针对孤岛工作面冲击地压事故频发的问题,通过在孤岛工作面高应力区域采用缺陷法防治冲击地压的技术,在孤岛工作面采用人为缺陷体转移应力场,在应力场转移过程中伴随着能量持续、缓慢的释放,并且能够形成卸压保护区,降低冲击地压危险性。采取卸压巷、爆破钻孔、大直径钻孔等人为缺陷技术方法,能够有效起到应力向工作面深部转移、能量释放的效果,并采用主动应力监测技术进行了效果检验。观测结果表明:通过缺陷体预先卸压,应力得到了有效降低与转移,工作面未出现应力积聚的现象。

According to the problems of the mine pressure bumping accident frequently occurred in coal mining face in the seam island, the defect method was app lied to prevent and control the mine pressure bumping in the high stress region of the coal mining face in the seam island, the artificial defect mass was applied to migr ate the stress field of the coal mining face in the seam island, the energy continuously and slowly releasing could form a pressure releasing and protection zone during t he stress filed migration process and thus the danger of the mine pressure bumping could be reduced.The pressure released gateway, blasting boreholes, large diamet er boreholes and other artificial defect technical method applied could effectively make the stress migration forward to the deep of the coal mining face and could have an energy released effect.An active stress monitoring and measuring technology was applied to the effect inspection.The observation results showed that based on the artificial defect mass pressure pre-release, the pressure was decreased and migratied efficiently, the coal mining face didnOt appear the phenomenon of stress accumul ation.

国家自然科学基金资助项目(51074101)；山东省科技发展计划资助项目(2011GSF12010)；