Major Hazard Risk Assessment Applied To Pillar Recovery Operations

Iannacchione, A. T.
Organization: International Conference on Ground Control in Mining
Pages: 10
Publication Date: Jan 1, 2009
Recent fatal injuries occurring during pillar retreat coal mining call for better identification of the hazards and recognition of risks. Ground control hazards associated with room-and-pillar retreat mining tend to intensify with depth, requiring extra precautions in the form of additional controls. In many locations these activities are further complicated by local complexities often associated with unique or novel circumstances, such as over-mining or under-mining. One technique recently studied by NIOSH, Major Hazard Risk Assessment (MHRA), may help mine operators to mitigate the risks associated with pillar recovery operations. The approach was trialed at two underground coal mines in southern West Virginia that are currently practicing pillar recovery. The first step in the MHRA process involved reviewing the segments or parts of the pillar extraction mining system and identifying associated hazards and threats to the operation. Some of the high risk hazards at these two sites included: ? Rock fall during pillar extraction covers equipment and injury ? occurs during recovery operations, Rock fall above the roof bolt horizon, potentially injuring ? workers and/or requiring recovery action,Rib fall under deep cover, potentially injuring workers, and; ? Strata instabilities associated with subsidence of the ? interburden due to simultaneously mining two seams in close vertical proximity to one another. The mines? risk assessment teams then considered each threat individually in order to systematically identify potential unwanted events. The top unwanted events were examined individually using structured risk analysis tools. The output from the process includes a list of priority existing controls for monitoring and auditing, and a second list of potential new controls. These controls consisted of: ? Examples of best practices, ? Enhanced communication, ? Implementing standard operating procedures (SOP), ? Protocols for emergency response actions, ? Effective layouts, ? Efficient monitoring, and; ? Successful audits. This paper documents the process as it unfolded at the two mines, and analyzes the strengths and weaknesses of the MHRA technique as it applies to pillar recovery operations. This work was part of a larger NIOSH research project. NIOSH was responsible for: 1) facilitating the risk assessment process known as Major Hazard Risk Assessment (MHRA), 2) documenting the risk assessment process, and 3) providing mine management with a written draft summary of the risk assessment process. The results of the risk assessment represent the thoughts and opinions of the individual risk assessment teams and should in no way be construed as an endorsement of the risk assessment output by NIOSH or the University of Pittsburgh.
Full Article Download:
(1053 kb)

Additional chapters/articles from the SME-ICGCM book 28th International Conference On Ground Control In Mining

Evaluation And Design Considerations For Pillar/Roof Separat
Bolt Profile Configuration And Load Transfer Capacity Optimi
Stability Mapping To Examine Ground Failure Risk: A Field S
Application Of Hilti Onestep Bolts For Roadway Support In Ge
Design And Control Of Working Support In Polish Coal Mines B
Rib Support Innovation At Daw Mill Colliery
Ground Control Design Challenges At The El Boleo Copper Proj
Design And Backfill Installation Considerations For Cut-And-
Evaluation Of Tailgate Ground And Support Interaction In The
A Roof Quality Index For Stone Mines Using Borescope Logging
Weak Floor Stability During Perimeter Mining In The Illinois
Roof Bolter Rocker Pad Deflector Systems
Overmining In Kailuan, China Mining Area
In-Situ Testing Of Roofex Yielding Rock Bolts In Coal Ribs
Top Coal Failure Mechanism Of Extremely Thick Seam In Top Co
An Innovated Self-Screwed Tube Bolting System(STBS) To Reinf
Major Hazard Risk Assessment Applied To Pillar Recovery Oper
3D Dynamic Simulation Of Reinforced Concrete Seals For 120 P
Time Dependent Roof Deterioration At A Central Ohio Coal Min
Controlling Factors Of Outburst Potential At Sihe Coal Mine,
Techniques To Investigate Subsidence Events Over Inactive Ro
Regional Two-Seam Stress Analyses At The Deer Creek Mine
Control Of Mining-Induced Seismicity In The Western U.S. Roo
Deep Cover Pillar Recovery In The US
Cementitious Seal/Rock Interface Under Hydrostatic And Dynam
Geotechnical Assessment Of Skin Reinforcement In Underground
Multiple Seam Highwall Mining In Appalachia
Coal Pillar Strength Based On The Ground Reaction Curve - A
Determination Of Horizontal Stress Direction By Underground
Seismic Events In German Hard Coal Mining
Influence Of Cutting Sequence On Development Of Cutters And
Feasibility Study And Design Of A New Underground Coal Mine
An Application Of Energy Release Rate
Roof Falls: An Inherent Risk In Underground Coal Mining
Indian Experiences Of Mechanised Coal Pillar Extraction
Trail Mountain Mine: A Case Study For Improving Locations O
The Back Pressures Associated With Resin Rock Bolt Installat
Longwall Recovery At Bailey Mine - Ground Control Challenge
The Forensics Of Underground Roof Falls
Determination Of Coal Pillar Strength Based On In Situ Testi
Numerical Modelling of the Range of Rock Fracture Zone Aroun
New Developments In Headed Rebar Ground Support
Coal Bumps And Odd Dynamic Phenomena - A Numerical Investig
Roof Control In Longwall Faces - Geological And Geotechnical
Ultra-Thick High-Production And High-Efficiency Longwall Min
Application Of A Polymer-Based Sealing Material To Prevent R
Calibrating Numerical Model For Room-And-Pillar Coal Mining