Yanbei Coal Mine, Huating Coal Industry Group Co., Ltd.

冲击地压是井工煤矿开采中常见的灾害之一,通过控制工作面推进度和产能可在一定程度上降低冲击风险。针对综放工作面安全生产能力合理性评判,通过对推采过程中产生的微震事件频次和能量进行统计和多元回归分析,评判工作面安全能力以及未采区域计划产能的合理性。结果表明,综放工作面在推采速度和产量小于一定值时,推采速度和产量不是影响工作面冲击危险性的主要因素,工作面生产具有较高安全性,通过抓好防冲措施落实可以有效防控冲击地压的发生;当推采速度和产量大于一定值时,震动频次、震动能量急剧增加,推采速度和产量与之呈现明显正相关性,成为影响工作面冲击危险性的主要因素,通过局部卸压很难保证安全生产。该分析方法简单、有效,可指导工作面安全生产,降低冲击地压发生风险。

Rock burst is one of the common disasters in underground coal mining, the impact risk can be reduced to a certainextent by controlling the advancement and productivity of the working face. Aiming at the problem of judging the rationalityof the safety production capacity of fully mechanized caving face, through the statistical and multiple regression analysis ofthe frequency and energy of microseismic events generated during the push mining process, the safety capacity of the workingface and the reasonableness of the planned production capacity of the unmined area were judged. The result shows that whenthe push mining speed and output of fully mechanized caving face are less than a certain value, push mining speed and output are not the main factors affecting the impact risk of the working face. The production of the working face has high safety,through the implementation of measures can effectively prevent and control the occurrence of rock bursts; When the pushmining speed and output are greater than a certain value, the vibration frequency and vibration energy will increase sharply,and push mining speed and output will show a clear positive correlation with them, which become the main factor affectingthe impact risk of the working face. It is difficult to ensure safe production through local pressure relief. This analysis methodis simple and effective, and can guide the safe production of the working face and reduce the risk of rock burst.