冲击危险煤层膨胀致裂卸压效果的数值模拟试验研究  

Numerical simulation test research on pressure relief effect of expansion-induced fracturing in shock-hazardous coal seams

作　　者：陈长鹏 王建华 Chen Changpeng;Wang Jianhua(School of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Xiaoyun Mine,Jining Mining Group Co.,Ltd.,Jining 272000,China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东青岛266590 [2]济宁矿业集团有限公司霄云煤矿,山东济宁272000

出　　处：《煤炭与化工》2022年第8期29-32,共4页Coal and Chemical Industry

摘　　要：为解决现有大直径钻孔卸压存在的巷帮深部煤体卸压能力不足和卸压效果提升程度有限的问题,基于霄云煤矿1318工作面,在分析常规大直径钻孔卸压前后煤粉监测数据的基础上,提出了膨胀致裂卸压方法,改善了大直径钻孔卸压技术。通过数值模拟手段,从塑性区分布和膨胀致裂后煤体所受应力差值2个角度,对比分析了不同膨胀力下膨胀致裂卸压的卸压效果。最终得出,实施膨胀致裂卸压能够有效提升巷帮深度5~10 m煤体卸压效果,卸压能力相较于常规大直径钻孔卸压最大提高136%,卸压效果明显。In order to solve the problems of insufficient pressure relief capacity of the deep coal body in the roadway and limited improvement of the pressure relief effect in the existing large-diameter boreholes for pressure relief, based on the basis of analyzing the coal powder monitoring data before and after the pressure relief of conventional large-diameter boreholes in No. 1318 Face of Xiaoyun Coal mine, a pressure relief method caused by expansion and fracturing was proposed and improved the pressure relief technology of large-diameter holes. By means of numerical simulation, the pressure relief effects of expansion-induced fracturing under different expansion forces were compared and analyzed from the perspectives of the distribution of plastic zone and the stress difference of coal after expansion-induced fracturing.Finally, it was concluded that the implementation of expansion-induced fracturing pressure relief could effectively improve the pressure relief effect of coal body with the roadway side depth of 5-10 m. Compared with the conventional large diameter drilling, the pressure relief ability was increased by 136 %, and the pressure relief effect was obvious.

关 键 词：冲击地压 膨胀致裂卸压 化学膨胀剂 大直径钻孔卸压 ABAQUS 矿山压力 

分 类 号：TD324[矿业工程—矿井建设]