急倾斜复合煤层采场裂隙演化规律及钻孔参数优化研究  

Research on crack evolution law and drilling parameter optimization of stopein steeply inclined compound coal seam

作　　者：王俊超[1] 朱传杰[2] 董太华 胡思佳 刘谦[2,3] 刘娜[2] 李龙 张智渊 WANG Jun-chao;ZHU Chuan-jie;DONG Tai-hua;HU Si-jia;LIU Qian;LIU Na;LI Long;ZHANG Zhi-yuan(Sichuan Guangwang Energy Development(Group)Co.,Ltd.,Guangyuan 628017,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;School of Resource Engineering,Longyan University,Longyan 364012,China)

机构地区：[1]四川广旺能源发展(集团)有限责任公司通防部,四川广元628017 [2]中国矿业大学安全工程学院,江苏徐州221116 [3]龙岩学院资源工程学院,福建龙岩364012

出　　处：《煤炭科技》2021年第3期87-92,共6页Coal Science & Technology Magazine

基　　金：国家自然科学基金资助项目(51874293);国家重点研发计划资助项目(2018YFC0807905)。

摘　　要：为解决赵家坝煤矿9号急倾斜煤层中1944工作面上隅角瓦斯超限的问题,通过数值模拟的方法对该矿覆岩"竖三带"以及裂隙演化规律进行了研究,依据数值模拟结果对瓦斯抽采钻孔布置方案进行优化,并考察了优化后的瓦斯抽采效果。结果表明,冒落带的最大高度为12.5 m,裂隙带最大高度为38.1 m。采用顶板斜交高位钻孔的方法来进行瓦斯抽放,通过结合模拟结果对高位钻孔布置进行优化。抽放结果表明,随着时间的延长,瓦斯抽采浓度增大,提高了瓦斯抽采效果,减少上隅角瓦斯超限风险。In order to solve the problem of over-limit gas in the corner angle of the 1944 working face in the No.9 steep coal seam of Zhaojiaba Coal Mine,the"three vertical zones"of the overlying rock and the evolution of fissures were studied by numerical simulation.Results the layout plan of gas drainage boreholes was optimized,and the optimized gas drainage effect was investigated.The results show that the maximum height of the caving zone was 12.5 m,and the maximum height of the fracture zone was 38.1 m.The method of top-sloping high-position drilling was adopted for gas drainage,and the layout of high-position drilling was optimized by combining simulation results.The drainage results showed that as time goes by,the concentration of gas drainage increased,which improved the effect of gas drainage and reduces the risk of over-limit gas in the upper corner.

关 键 词：采动覆岩 裂隙 “三带”高度 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]