深井复杂条件下巷道危险区域冲击地压防治研究:以唐口煤矿为例

唐口煤矿6305工作面煤层具有强冲击倾向性、顶底板具有弱冲击倾向性,巷道冲击地压问题显著。在综合分析地质因素的基础上,预测划分出工作面两巷道分别存在重度危险区域2个,中度危险区域2个。通过在巷道掘进过程中采用应力在线监测预警系统、微震监测系统和钻屑法检验,并重点监测预测危险区域,最终确定巷道冲击危险程度,并采取相应的预防措施。结果表明,逐级采用卸压爆破法与大直径钻孔卸压法对冲击地压进行防治,能有效降低冲击地压的危险性。

Prevention Study on Mining Dangerous Zone Under Complicated Conditions of Deep Roadway: A Case Study in Tangkou Coal Mine

The rock burst of No. 6305 coal mining face is remarkable in Tangkou Coal Mine, because of the strong burst trend coal and weak burst trend roof and floor. Based on comprehensive analysis of geological factors, dangerous assessments were got. The assessments indicate that there are two severe, and two moderate dangerous zones in every roadway, which are in line with actual observed rock burst situations. In order to determine the risk degree of rock burst, the methods including stress monitoring system, micro-seismic monitoring system, and method of drilling index were taken, meanwhile the dangerous zones were monitored mainly. Aiming at that, the corresponding preventive measures were put forward. The research results show that it can effectively reduce the danger of the rock burst occurred that using blasting method and large diameter borehole pressure relief method step by step.