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Assessment of ground instability risk of lower seam longwall panels during crossing overlying remnant pillars

机译：交叉覆盖覆盖柱横跨侧缝柱的地面不稳定风险的评估

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摘要

One of the most challenging safety problems is ground instability during crossing overlying remnant pillars (CORP). Ground instability not only causes injury to miners or fatalities, but also leads to interruptions in the mining operations and breakdowns in equipment. In this paper, 12 major parameters influencing the ground instability were firstly determined based on extensive international experience associated with CORP. The consequences of the ground instability were then assessed in terms of miners' health and financial losses. Afterwards, a practical method to assess the ground instability risk of lower-seam longwall panels during CORP was developed based on its probability and consequence. Finally, this method was successfully used to determine the best scheme for CORP of LW10-103 at Mugua coal mine. The main advantage of this method is that it enables mining engineers to easily use international experience for assessing the risk of ground instability and selecting reasonable supports during CORP.
机译：在穿越覆盖的剩余柱（CORP）期间，最具挑战性的安全问题之一是地面不稳定。地面不稳定性不仅对矿工或死亡人口造成伤害，而且还导致采矿业务的中断和设备故障。在本文中，基于与公司相关的广泛的国际经验，首先确定影响地面不稳定的12个主要参数。然后在矿工的健康和财务损失方面评估地面不稳定的后果。之后，基于其概率和后果，开发了一种评估了在CORP期间下缝长墙板面板的地下不稳定风险的实用方法。最后，该方法已成功地用于确定Mugua煤矿的LW10-103 Corp最佳方案。这种方法的主要优点是，它使挖掘工程师能够轻松使用国际经验来评估地面不稳定的风险，并在公司期间选择合理的支持。

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