A loader bucket on a CAT R3000H came down and crushed an employee while in use, resulting in a fatality. The injured employee was operating a UTV (gator) in Unit 43 near the feeder breaker (Stamler) when the incident occurred. This incident is still under investigation.
Production hoist blew a hydraulic line, making it inoperable.
PHoist did not pass pinion brake checks. A mechanic was called to adjust, and upon inspection, it was found that an electrical contact in the pinion brake caliper had corroded and was broken. An evac was called while repairs were being made.
Two employees were bolting in a narrow belt line area when the bolter tripped the e-stop cable. While discussing reset options, one employee attempted to squeeze through a tight area. While doing so, the bolter shifted, pinning them between the bolter and rib. They called for help, and the other employee moved the bolter to free them.
Lost power to the mine due to an outage from Cleveland Public Power (CPP). Reported issue to CPP
Faults were occurring on Phoist that could not be cleared at approximately 11:35 pm. EVAC was called at approximately 12:05 am since we were still troubleshooting the issue and did not have control of the hoist.
Loss of power due to transformer issue at neighboring business. Notified Cleveland Public Power (CPP) of issue.
Loss of power on surface and underground due to city outage. Reported to Cleveland Public Power (CPP) for repair.
Power failure due to loss of incoming power from city substation. Notified Cleveland Public Power to report outage.
An employee observed an electrician's golf cart that was parked near the Phoist control room was on fire and notified their supervisor. The supervisor contacted CFD and verified that the EVAC system was activated. The supervisor immediately traveled to the location of the golf cart and found that the fire had been extinguished by employees using fire extinguishers.
Lost operation of the PHoist due to a failed drive module
Lost use of PHoist due to drive fault/bad module caused by high moisture.
At approximately 10:30 PM, the number one main fan went down due to mechanical issues. Based on the inspection, it appears the impellers came off, the bearing locked up and it went high amps/temp.
During hoist checks, the tanks for the pneumatic system did not refill. Issue could not be resolved within allotted time frame, so EVAC was called. Cause of issue was found to be a rubber gasket from the oiler blew out and lodged itself in the #2 pneumatic valve.
An employee was cutting a zip tie off of a D-ring when the knife slipped and sliced the inside of EE's left forearm. The laceration was approximately 1"" in length and required 3 stitches. The employee was permitted to return to work with instructions to keep the wound covered. This incident did not result in any lost time.
Surface employee tripped/fell near rail yard and suffered minor abrasions/contusions to left hand, right knee/thigh & right chest. Medical attention was offered and declined. 3 days later (3/28/25), employee requested to be evaluated and was diagnosed with abrasions/contusion to right knee, left hand & right chest wall. *Became reportable on 3/28/25**
Transformer blew on surface, which caused power to drop on the surface and in the mine. Outage was reported to Cleveland Public Power (CPP) and mine was evacuated until power was restored.
Lost power to the site. Issue was related to Cleveland Public Power (CPP). Issue was being worked on and resolved by CPP.
Lost use of the Phoist. Troubleshooting found that there was a bad drive/fuse that needed to be replaced. Called evacuation while repairs were being made
PHoist brake not functioning properly. Brake switch needed to be adjusted
Mine EVAC was called due to liner issues on SHoist
Power outage dropped power on surface and in mine, no power to Phoist.
Inclement weather caused mine and part of surface operations to drop power. Generators were utilized and a mine evac was called.
Chipping concrete and a piece of concrete dropped and rolled towards employee cutting EE's leg.
Employee was working to repair an emergency lowering and jammed EE's finger while removing the guard. EE reported but declined medical attention. Employee reported swelling and discomfort 8 days later and was taken for medical evaluation. Diagnosed with a sprain/contusion and a splint was put on the finger. **Did not become reportable until 7/9/2024**
Employee shoveling and their shovel struck the cardboard/rocks surrounding, causing the shovel to stop abruptly. Employee felt a sharp pain in right shoulder and informed supervisor. Medical was offered and turned down. Employee returned next day and requested medical evaluation. **Became reportable on 5/15/24 - Diagnosed with shoulder strain is currently on restricted duty
Ground fault on PHoist, SVI or SVE fault codes
SHoist fault, believed to be an electrical issue with a sensor but we are trouble shooting to identify and repair.
Employee was working on 1928 screw replacement. EE was pulling on the screw & felt pain in left shoulder. The employee was offered and declined medical attention. On 4/16/24 the employee stated that the shoulder was still bothering EE, and wanted to get it checked. After evaluation, employee was put on restricted duty as of 4/17/24 ***DID NOT BECOME REPORTABLE UNTIL 4/17/24***
EE was shoveling salt onto the belt while cleaning 22 skip tail. While raising the shovel to dump the salt onto the belt, the EE felt a sharp pain in their right shoulder/arm. EE noticed a large bruise the next morning & noted that the area was sore & was experiencing pain & difficulty when moving their right arm. *Didn't become reportable until 3/5/24. EE will require surgery.
Drilling in unit 41, employee hit a methane bleeder. Initial readings were above permitted range, so a mine evacuation was called.
An electrician reported pain in their right knee while walking up and down stairs. The employee declined medical attention. The employee later reported that the knee was feeling worse, so we took them for medical evaluation. Employee was able to continue work but was told to avoid stairs, climbing etc. **Update** The employee was put on medical leave as of 3-15-24.
EE was lifting a steel bar attempting to load it into a roll of belt. During this process, the EE strained their left shoulder.
EE suffered 1st degree burn on right arm while checking coolant on piece of equipment.
Damaged brake line on P hoist making it inoperable until repaired.
Actuator mount on SHoist was loose, so maintenance tightened it up. When doing so, it threw the position sensor off. An electrician attempted to adjust the switch and the connection broke off making it inoperable.
P Hoist was not operable due to a blown hydraulic line.
PHoist had an alarm and would not function in auto or manual - South SPV1 pressure valve alarm would not reset.
Cleveland Public Power outage caused skip mine to drop power
Overtravel of SHoist, unable to correct in manual.
One of the hoist ABB drives was overheating needed to be replaced. While installing the new drive, the drive rocked back, pulling hard on the EE's left shoulder and striking EE's shin. The employee sustained an abrasion/bruise to the left shin, a cut on the right middle finger, and a sore left shoulder.
Production hoist was down due to blown drive module.
Loss of power feed from the utility company, Cleveland Public Power (CPP), that provides power to hoist.
Issue with the PHoist PLC causing problems with travel. Error message showed ""E-stop"". Called EVAC of mine while we were troubleshooting to repair.
EE's foot got caught on a chain and EE fell to the ground. EE put hands out to stopped self from falling. When EE hit the ground, EE injured finger.
An underground storeroom employee was working near a shelf when a pulley fell off the shelf and struck their right foot. Employee was given first aid by surrounding employees, transported out of the mine and to the hospital for further treatment.
EE USING AN OIL DRUM CART/DOLLEY TO MOVE A FULL 55 GALLON DRUM IN SURFACE LUBE ROOM. EE PICKED UP THE DRUM WITH THE CART, SLIPPED AND FELL. THE DRUM AND CART LANDED ON TOP OF EE, PINNING EE. EE WAS ABLE TO REACH EE'S CELL PHONE AND CALLED FOR HELP. EE WAS LOCATED IN A MATTER OF MINUTES; THE DRUM WAS LIFTED OFF OF EE AND EE WAS TRANPORTED VIA EMS TO THE HOSPITAL
Production Hoist Blew a brake hydraulic Hose and the brake would not release.
On first skip of the day, hoist kicked out at the landing. Electricians began troubleshooting. Found E house to be very cold. Found bad converter. Began replacement once evacuation was called.
Electrician called stating they had no control over the production hoist as it was tripping out on the ground fault. They were not able to clear the fault and regain control of the hoist within 30 minutes. Upon inspection, it was found that the drive unit was causing the ground fault. The drive unit was replaced, and the system was tested.
Hoist fault drive - water leaked from roof onto drive causing it to fault
One of the door hinges broke off on the door for the service hoist.
Got hot oil on the production hoist, tripped breaker. Reset breaker and let cool.
A seasonal worker was using an unapproved box cutter to cut up a bag when they cut their hand. The cut required stitches.
Lost power to production hoist because utility owned line went dead.
Lost power to production hoist because utility Own line went dead
Lost power from the utility company that powers our production shaft.
3 shaft inspectors were doing a shaft inspection in the production hoist when a drive and 2 fuses blew. The skip the inspectors were on was near the mine landing at the time the incident occurred.
Large piece of salt got stuck in head chute. Employee was jack hammering the salt piece loose, when the salt piece came loose the employee slipped causing their left hand ring finger to get pinched in between the chute and jack hammer handle.
70 ton feeder on the surface was full and a skip was loaded so it could not dump into the feeder. Hoist was still technically operational.
70 ton feeder on the surface was full and a skip was loaded so it could not dump into the feeder. Hoist was still technically operational.
An electrician was working to diagnose a problem with encoder faults on the production hoist. A service specialist remoted in and advised making a change in the diagnostic screen. This change took control away from the hoist operator and made it inoperable when in automatic.
Hoisting Manufacturer was preforming annual inspects they triggered a fault in the computer system that they were unable to manually clear.
During skip checks it was noticed that the skip was stopping 3 ft short while dumping in automatic mode. This was because of normal rope stretch that occurs over the life of the hoisting system. The computer program needed to be adjusted so that the skip was dumping at the correct height and limiting spillage.
Two employees were in close contact while powdering on 6/23/2022. One of these employees began to experience symptoms at the end of shift on 6/23 and went home and later tested positive for COVID 19. Based on contact tracing initial employee contracted COVID 19 from outside of work. The second employee who was in close contact began to have symptoms and test positive on 6/26/2022.
Power outage to the plant due to utility provider issue (Cleveland Public Power) causing main power supply for service hoist to be disrupted.
Employee was removing a guard when it swung down and cut their arm which required 6 stitches.
The 70 ton bin that the skip dumps into stopped running and the hoist continued to run and filled the 70 ton up and causing the belt it feeds into to become buried. The skips were fully loaded and had no where to dump the salt. It was determined that this happened because there was bad Diode on the motherboard of the 70 ton bin system.
While putting equipment on the lowering slide, a drill cylinder fell off. The employee went to lift it back in place. When lifting it in place they hurt their bicep and shoulder.
Employee was performing visual inspection of equipment while standing on step (attached to machine) elevated approximately 18 inches from ground level. Step failed/broke at the weld point causing the employee to fall on their left arm which led to a dislocation of the employees shoulder.
At start of production limit switch trip because the east skip did not make it all the way up to trip the switch.
Electrical fault resulting in the failure of the DC Motor for our Service Hoist.
There was an intermittent control fault and hoist could not be put back in to normal function.
There was a drive fault on the production hoist and for it would not set.
At approx. 10:00pm on 1/7/2022 an UG mechanic was traveling out of the mine when they discovered the a roof fall @ fault hill. The initial report estimated it to be 6'x4'x2'. Upon investigation it was determined that the roof fall was approximately 25'x 12'x 18/24"" at it's deepest and widest section.
Hoisting was commencing as normal until the hoist tripped out and ABB had to be called to trouble shoot computer issues remotely.
The Production hoist had a fault that could not be cleared, making it inoperable. Through diagnostic testing was done remotely by ABB and it was determined that the ethernet card was bad and needed to be replaced.
The Hoist Operator was preforming skip checks when they discovered that the track limit switch was not working properly.
EE was walking down a set of stairs and turned right at the bottom landing of the stairs and felt a pain in their right knee.
When performing production hoist daily checks the hoist consistently failed static and drag tests.
While entering the basket of a powder truck the employee reached over with left hand to close the lift arm. During this EE's hand slipped allowing for EE's left pinky finger to slide into a pinch point at the bottom of the lift arm. This resulted in the left pinky finger tip to become fractured and a laceration resulting in stitches.
Two maintenance employees were working on No 5 air door to remove the two bottom sections that had been previously damaged. While removing the rollers the door unexpectedly fell impacting the employees right index finger causing a laceration. The employee was taken for medical attention and received several stitches in the right index finger.
While performing repair work on a forklift, a maintenance employee pinched fingers on both hands between the first and second stages of the mast. The employee received 5 small (<1/2 inch) lacerations that required medical treatment. EE was released to return to work the same day.
Production hoist brakes set on a pressure fault and would not release.
A surface maintenance employee was working on an e-stop PM for the OCS gallery. Upon completion at 1 belt tail, the employee walked back to golf cart that was parked at 14 belt head. During the employee's walk back to golf cart, they slipped on ice that they did not see. The slip and fall resulted in an injured lower right leg.
Production hoist module 6 high temp fault as a result of inadequate cooling.
Hoist high temp fault tripped the production hoist out and could not be cleared.
Production hoist was getting brake pump faults and no hoisting functions would operate.
IE was assisting with lowering an apparatus into a reclaim tunnel. The IE pushed on the lowering cable when the load shifted causing the IE to fall toward the hole. The IE jumped across the corner of the hole and landed on ankle. IE's right ankle rolled backward causing a dislocation and a fracture of the lateral malleolus.
A gas bleeder was hit while bolting in Unit 40 C Right. Employees were removed from the unit, equipment was shut down, power was de-energized, and ventilation changes were made.
The connection point on one of the guide rope cheese weights of the production hoist failed. The cheese weight separated at the reliance clamp and no longer provided tension to the rope.
At 7am on 8/10/20 the production hoist went down due to a power feed failure from Cleveland Public Power. The initial power problem was remedied at approx. 1pm. However, during the process of resetting the production hoist a second power failure occurred at the CPP substation. This problem was also resolved by CPP and crews began heading back into the mine at approx. 4:15pm.
Production hoist tripped to manual on a brake fault that was unable to be reset. Pinion switch was cleaned and lubricated. Production hoist was reset and tested.
Production hoist went to manual on a safety circuit fault. E2 pinion break sensor would not clear.
Facility lost incoming power from supplier (CPP) to package warehouse and production hoist.
Public power electric supply failure. Production hoist lost one phase of the 4160 power to the production hoist.
City public power lost service to the grid providing power to the West side of the city. All site power was interrupted.
Overhead Line on Cleveland Public Power feed to Production Hoist failed.
Production Hoist brake pinions would not release and allow the conveyance to move.
A surface bulk handler contacted left knee on a rail switch component while walking in the rail yard. The impact with the steel structure resulted in an approx. 1 and ½ inch laceration directly above left knee. The employee was transported to a hospital where employee received treatment and was released for duty with no restrictions the same day.
Production hoist would not release for proper cycle.
Service hoist tripped out during lowering on a track limit switch fault.
The service skip over traveled approx 1-2 feet beyond the mine landing while lowering a fuel trailer.
Production hoist power supply board failed. Loaded skip was mid shaft at the time of the board failure. Board was replaced, skip was emptied, and test runs were performed.
Heartbeat fault occurred on production hoist and could not be cleared
Total site power loss as result of an area wide power interruption from Cleveland Public Power
Production hoist tripped out on a rope slip fault. Tach was replaced and test runs were performed.
Power dropped from the service provider to the facility. Power was restored to the site but upon testing the service hoist would not function properly. Investigation identified that the soft start on the mg set had failed.
The employee slid down a small slope and hit an obstruction forcing EE to stumble. EE tried to catch self with left arm, resulting in a dislocated left shoulder.
An employee working at the UG stacker slipped when stepping down from the loader EE was operating. The employee had one hand on the handrail when EE slipped, and as EE fell off balance, EE swung sideways into the machine and contacted EE's left shoulder on the frame of the equipment. Several months of diagnostics were performed until medical treatment was administered on 11-1-19
As a result of excess grease build up the production hoist pinion brakes would not set properly to perform the static test.
Production hoist head rope #4 was found to be out of spec during regularly scheduled NDT testing. The hoist was taken out of service and work is underway to replace the production head ropes.
Upon completion of repair work an employee rolled ankle while stepping down from the cab of a face drill. Upon follow up visit to a physician on 10/11/2018 the employee received restrictions and medical treatment that made the incident reportable.
Running generator test and drive unit faulted.
Communication fault on drive system of production hoist. Troubleshooting identified the problem as a defective communication cable. The cable was removed and replaced the hoist was tested and put back into service.
All plant power was lost due to an area wide blackout impacting the entire west side of Cleveland. Power was restored by CPP at approx 2 am.
Production hoist brake line failed and needed to be replaced. *After repair was made to brake line hoisting system could not clear a brake position fault. This was not a secondary issue it was part of the previously reported instance. No one was underground at the time this issue was identified during test runs.*
After receiving NDT test results it was determined that one of the production hoist tail ropes was at retirement criteria and needed to be changed.
All plant power was lost as a result of a Cleveland Public Power feed issue.
While working, an employee used left foot to slide a half full bucket of oil out of the way and felt pain in the left knee. Over the course of several months the employee worked through multiple diagnostic appointments with medical providers until a cause of the pain was identified. On Thursday March 21st treatment was administered that made the injury reportable to MSHA.
During a periodic inspection elevated methane and hydrogen sulfide levels were identified in an isolated area of the mine used to store water produced by the operation's drilling and grouting efforts. Although categorized as such by MSHA hotline personnel this was not an unplanned inundation of gas.
Service Hoist faulted while lowering materials and could not be reset.
Service hoist became inoperable due to an HMI communication fault and could not be reset.
Cleveland Public Power line failure. Power line down on backside of the production hoist control room, across railroad tracks.
A maintenance employee was using a lock back utility knife to remove the lid from an oil bucket. While in the process of cutting the lid free, the employee's hands slipped and the blade of the utility knife contacted the back of ee left thumb. The blade cut through ee glove and caused a small laceration.
Lost power to the entire site from the Cleveland Public Power electrical feed.
Service hoist tripped out on a brake fault and could not be reset. Leaking air valve was identified during trouble shooting. Valve was repaired, test runs were performed and the hoist was put back into service.
All power to all surface and underground operations were lost due to a Cleveland Public Power equipment failure at an offsite substation that supplies power to the west side of the city.
Production Hoist braking system would not release. The Hoist was deemed out of service, evac was called, and MSHA was notified.
The production hoist went down and could not be reset. Troubleshooting began and a fault in the #2 drive was identified. The fault was corrected, test runs were performed, and the hoist was put back into operation.
Core hole drilling was taking place at the unit 10 drill site. While an employee was in the process of reattaching the quill rod to the drill string a piece of core rock unexpectedly exited the end of the drill steel and ricocheted off of the drill structure contacting the employee in the left side of the neck causing a deep laceration that required treatment.
During normal operation of the hoisting system the deflection wheel broke free from its mounts and became displaced. This caused a misalignment of hoist head ropes.
The production hoist tripped out on a heartbeat fault and could not be reset.
Production hoist was out of service due to a PLC loss of communication.
Lost power feed from Cleveland Public Power to both Hoists.
A phase was lost on the power pole that supplies power to the production hoist. The loss of phase caused the production hoist cool fan motors for the hoist converters to fail.
The production hoist W2 pinion brake would not release.
A Hydraulic line on the south east brake unit of the production hoist failed.
An employee damaged the service cage header while unloading materials. The employee tried to make the repairs but when unable, ee reported the incident to the Mill operator. The Mill operator relayed the message to the on shift maintenance supervisor. The supervisor traveled to the area, inspected the damage, and decided to down the hoist for repairs.
While in the process of installing chain hangers an employee drilled into a small pocket of methane. The employee stopped work and called the supervisor. All work was stopped in the unit, power was de-energized, ventilation was increased, and MSHA was notified.
Electricians could not get the MG set to operate properly. It was identified that the brake control stick was not properly positioned. The brake controller was repositioned and the system was reset.
The feeder coil on the surface 70 ton bin failed. The bin was unable to feed material out and was too full to accept a load from one of the productions skips that had already been loaded. The feeder coil was replaced, the loaded production skip was emptied, and the hoist was able to once again be used for man hoisting.
Service Hoist tripped out on over speed due to receiving a faulty amp signal.
The Hydraulic pump would not reset on the production hoist pinion brakes. Employee replaced motor starter but the pump still would not run. Employee found blown control fuse replaced it and the hoist was back up and running.
At approx. 5:15 AM surface maintenance discovered that the PLC system for the production hoist had frozen preventing them from being able to operate the hoist controls. Trouble shooting was done, the PLC was reset, and the hoist was functional.
The 70 ton feeder was not running this allowed the 70 ton hopper to fill and stop hoisting. The west skip of the production hoist could not be emptied and because of that it could not be used an escape way if needed. The coil of the feeder was repaired and normal operation continued.
An operator was tramming the 750 cable truck in A main in intake air when the equipment stalled at M17 along the west rib line. The operator attempted to restart the equipment but it would not start. The employee turned to look at the engine to see if they could identify a problem and noticed flames coming from the engine compartment.
At approx 4:45 a problem was identified during normal testing of the production hoist main breaks. Trouble shooting began, repairs were made, and the hoist was opperational at approx 5:45 am.
At approx 4 PM a drill operator found a misfire in u27 d tunnel face. The drill operator attempted to use an inappropriate technique and utilize the face drill steel to clear the misfire. This action caused the misfired cap to unintentionally detonate. There was no injury and minimal property damage. The drill operator's actions did not follow approved misfire protocol.
The east production skip did not fully dump on surface. The east skip returned to the mine and was loaded a second time. Due to the additional weight the skip was not able to be hoisted. The production hoist was not avaliable until the additional salt was removed.
The South Transformer Main Breaker tripped at 8:25PM affecting the service hoist. The cause of the power trip could not be immediately identified and the mine was evacuated.
The Hydraulic pump would not reset on the production hoist pinion brakes.
As a Bolter operator was installing chain hangers in U15 83 panel C tunnel he began to see visible emmisions exiting the hole he was drilling. The unit was evacuated, power was dropped and a supervisor was called to check the air. At Approx 1:15 a supervisor performed a legal gas check at the hole and registered .45 % CH4. The Mine superintendent and MSHA was notified.
Hot work was performed on the fan during first shift, fire watch was performed with no issues. All employees exited the mine at 7PM. At approximately 11:45 pm third shift maintenance employees discovered the floor around the fans producing smoke. The employees used two extinguishers on the floor and called for a mine evac. No flames were ever observed.
While operating the walk behind Bobcat skid steer, performing clean up duties in the underground mill the employee pinched his hand near his pinky/ring finger between the piece of equipment and the surrounding steel structure causing a small laceration.
During the replacement of the lanyard switch at the service landing, it became impossible to reset the service hoist. The remote e-stop relay in the safety circuit would not close, thus not allowing reset.
While drilling in GH 20 drillers were encountering gas and water. During routine air monitoring per drilling procedures drillers detected .26% CH4 at the designated monitoring area at U2
The production hoist tripped to manual on a converter fault. The control board on the east converter was found to be bad. The board was replaced, power was restored, and test runs were performed.
During an inspection of the production hoist the employees tested the upper limit switch and the hoist tripped out but was unable to be reset. The employees remained on the inspection deck during troubleshooting of the hoist but were able to exit the work deck if needed via a ladder to the next level of the head frame. The brake switch was reset and the hoist became operational.
The pin that holds the link bar for the number tail 2 rope in place at the bottom of the east production skip had failed allowing the link bar, chase block, swivel and tail rope to fall to the bottom of the production shaft. The rope damaged the dividing timbers below the mine landing and came to rest in the loops of the remaining three tail ropes.
During routine inspection, a maintenance supervisor identified the presence on methane at the mouth of unit 6. MSHA was notified. Curtains were established in the west sub main to increase ventilation. Additional fan added to unit 8 D entry 35 panel.
Service Hoist would not moved and displayed a communication fault. Switch was rebooted and test runs were performed.
While conducting regular examinations a maintenance supervisor detected the presence of a small amount of methane at the mouth of Unit 6. Upon further investigation methane was being liberated from one of the drill site discharge lines in U8. The lines were closed in and the area was allowed to ventilate.
Employees tried to start the production hoist it would not operate and a communication error was received.
East motor of the production hoist failed due to a short in the armature impairing use of the production hoist.
While descending the LHD ladder way, the maintenance employee lost his balance as he stepped to the ground. He stumbled backwards, fell to his backside and contacted his head on the structure of a spare tail piece near where the LHD was parked. The employee received staples to close the wound to the back of his head.
Production hoist went to manual. Electricians investigated and performed trouble shooting. Problem was identified as brake caliper was out of adjustment. Caliper was adjusted properly and re-secured. Tests were then performed.
Service hoist kicked out because of a rope slip fault and could not be reset. Tach driver was replaced.
Employee was changing a bit on a roof bolter drill steel. He tripped and placed his right hand on the loaded bolt carousel to brace himself. His right pinky finger contacted the corner of a roof bolt plate causing a small laceration.
The employee noticed a piece of debris in his walking area at the gator pad. In an effort to prevent himself or someone else from tripping or injuring themselves he attempted to toss the chunk of salt to the nearest rib. In the process of throwing the chunk he contacted his right pinky finger on the lid of a nearby Knack box causing a laceration.
West loading pocket of the production hoist broke free at the flange connecting it to the butterfly gate. The pocket slid down damaging a cat walk and one of the nearby button timbers. The cat walk has been removed and the button timber has been cleared from the hoist way.
The service hoist tripped out while staged at the mine landing. Trouble shooting began and a bad magnetic switch was identified as the problem. The switch was replaced.
While inspecting the east production hoist motor, damaged bolts were identified between the coupler and the disc. Hoisting was stopped a mine evac was called and the damaged bolts were replaced.
An employee was sitting in his gator taking a break. He stood up to go get a drink and due to an underlying medical issue blacked out falling forward and contacting the lower half of his face with the floor. He was transported to Lutheran hospital and treated for a cut on his chin and a broken jaw. The employee is still under evaluation by personal physicians for medical condition.
The DC converter control card for the production hoist failed not allowing the hoist to function.
PLC processor card failed on the production hoist taking it out of service.
Hoist went into manual and could not be operated. Processor card lost program memory.
Service hoist went down at 4:15 am. PLC processor card failed. Processor needed to be replaced and software reinstalled.
At shift change the service hoist went down no personnel were in the mine. The drive control power and the track limit switch in the mine were repaired and the hoist was put back into operation
While bolting in U8 E tunnel 53 panel a small pocket of methane was breached and bled out within 20 minutes highest reading obtained was .9 percent.
Concrete rubble was observed on top of the service skip by DMC as they were preparing to begin the day's work in the shaft. Concrete from the shaft liner broke free and contacted the bonnet of the service hoist causing minimal damage.
Roll back fault occurred in the service hoist system. Hoist was reset and all checks were done. Hoist was placed back into service.
Miner had his finger smashed by a bolt driven out of a guide and pinching his finger against the shaft wall.
While attempting to shift approach rail away from the #6 scale rail, the joint bolts were removed and a steel wedge was driven into the gap to force joints to tighten the gap that opened up in the joint. The new bolts were installed and the wedge was hit with a 10-lb. sledge hammer. The wedge jumped out and flew into EE's leg causing the injury to occur.
Hoist Power feed failed at the transformer controlled by Cleveland Public Power. Feed was then repaired by CPP.
During motion on lower a vertical bent section, injured worked contacted the edge of an exposed angle iron. Injured worker received a laceration on his left forearm.
The hand brake of a rail car was stuck so the employee tried to jerk the wheel, it did not move and he felt pain in his left shoulder. The employee was diagnosed with a minor tear in the left shoulder. No work restrictions were given and the employee was prescribed physical therapy.
The voltage regulation transformer for the production hoist control circuit had and internal problem that would not allow it to provide full voltage to the system & a brake solenoid coil connector shorted internally and needed replaced.Both issues were evaluated and corrected.
Power was lost to the entire facility due to an accidental trip by Cleveland Public Power. CPP was contacted and the power to the site was restored.
The Prod hoist tripped and could not be reset. Upon investigation It was determined that an H strand on the SW guide rope of the west skip had separated from the rope and had coiled up between the shoeboxes for the entire length of the rope. The coiled H strand contacted and damaged the first limit switch as the skip reached the head frame.
TWO MECHANICS AND A SUPERVISOR WERE ATTEMPTING TO RAISE THE TRIPPER BRIDGE TO MAKE AN UPGRADE. WHILE THE SUPERVISOR WAS ASSISTING THE TWO MECHANICS BY OPERATING THE MANUAL JACK, MOVEMENT IN THE JACK ARRANGEMENT OCCURRED CAUSING THE MATERIAL USED AS AN EXTENT ION BETWEEN THE JACK AND THE TRIPPER BRIDGE TO BE THROWN OUT. THE EXTENSION STEEL STRUCK THE SUPERVISOR IN THE HEAD.
Hydraulic brake system for the production hoist was overheating and was unable to be reset. The problem was evaluated and correcting by replacing hydraulic brake system control valve.