Geotechnical risk management to prevent coal outburst in room-and-pillar mining

A coal outburst is a severe safety hazard in room-and-pillar mining under deep cover. It is more likely to occur during pillar retreating. Multi-seam mining dramatically increases the risk of coal outburst within the influence zones created by remnant pillars and gob-solid boundaries. Though coal ou...

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Bibliographic Details
Published in:International journal of mining science and technology 2016-01, Vol.26 (1), p.9-18
Main Authors: Zhang, Peter, Peterson, Scott, Neilans, Dan, Wade, Scott, McGrady, Ryan, Pugh, Joe
Format: Article
Language:English
Subjects:
Coal
Coal mines
Coal outburst
Mining
Outbursts
Pillar retreating
Pillar stability
Pillars
Risk analysis
Risk assessment
Risk management
多煤层开采
岩土
工程风险管理
开采煤层
煤柱下开采
煤突出
突出危险性
风险评估
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Summary:A coal outburst is a severe safety hazard in room-and-pillar mining under deep cover. It is more likely to occur during pillar retreating. Multi-seam mining dramatically increases the risk of coal outburst within the influence zones created by remnant pillars and gob-solid boundaries. Though coal outburst is gener- ally associated with heavy loading of coal pillars, its occurrence is difficult to predict. Risk management provides a proactive tool to minimize coal outburst in room-and-pillar mining under deep cover. Risk assessment is the first step in identifying and quantifying outburst risk factors. The primary risk factors for coal outburst are overburden depth, roof and floor strength, geological anomalies, mining type, multi-seam mining, and panel width. A risk assessment chart can be used to proactively screen out min- ing sections with high risk of coal outburst for further analysis. Gob-solid boundaries and remnant pillars are critical factors in evaluation of the coal outburst risk of multi-seam mining. Risk identification, risk assessment, geologic influence mapping, geotechnical evaluation, risk analysis, risk mitigation, and mon- itoring are essential elements of coal outburst risk management process. Training is an integral part of risk management for risk identification and communication between all the stakeholders including man- agement, technical and safety personnel, and miners.
ISSN:2095-2686
DOI:10.1016/j.ijmst.2015.11.003