华亭煤矿强矿压力学机制与防治对策

发布时间：2018-11-10 17:23

【摘要】：为从机理上认识和防治华亭煤矿强矿压,应用震源机制解答方法反演强矿压岩体破裂机制,结合现场地应力测量、微震监测、现场调查、采矿活动分析和理论分析等技术途径,验证震源机制解答方法的可靠性,分析强矿压成因,制定强矿压防治策略。研究得出如下认识:震源机制解答方法反演煤矿采动岩体破裂机制的应用效果较好;华亭煤矿强矿压频发的主要原因是水平应力强度高、最大主应力方向与巷道走向大角度相交、厚层砂岩大面积悬顶、底煤厚度大且冲击倾向性强;防治此类强矿压发生的主要途径是工作面设计应避开最大主应力方向与巷道走向大角度相交、先开采底板抗冲击性能较好的下分层、顶板预裂卸掉垂向采动应力和巷道钻孔、切槽断底。
[Abstract]:In order to understand and prevent the strong rock pressure in Huating Coal Mine from the aspect of mechanism, the source mechanism solution method is used to invert the fracture mechanism of the rock mass under strong rock pressure, which is combined with the technical approaches of in-situ stress measurement, microseismic monitoring, field investigation, mining activity analysis and theoretical analysis, etc. This paper verifies the reliability of the solution method of seismic source mechanism, analyzes the origin of strong rock pressure, and formulates the prevention and cure strategy of strong rock pressure. The main conclusions are as follows: the method of source mechanism solution is effective in inversion of fracture mechanism of mining rock mass in coal mine; The main reasons for the frequent occurrence of strong rock pressure in Huating Coal Mine are high horizontal stress intensity, large angle intersection between the direction of maximum principal stress and the direction of roadway, large area suspended roof of thick sandstone, large thickness of bottom coal and strong impact tendency. The main way to prevent the occurrence of this kind of strong mine pressure is that the working face design should avoid the intersection of the maximum principal stress direction and the roadway direction at large angles, first, the lower layer with better impact resistance of the floor is mined, and the roof pre-cracking removes the vertical mining stress and the roadway drilling. Cut the groove to the bottom.
【作者单位】：北京科技大学金属矿山高效开采与安全教育部重点实验室;北京科技大学土木与环境工程学院;甘肃华亭煤业集团有限责任公司华亭煤矿;
【基金】：国家自然科学基金资助项目(51274025)
【分类号】：TD32

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