深部煤层冲击地压机理与防治技术  

Mechanism and Prevention Technology of Rock Burst in Deep Coal Seam

作　　者：高新[1,2] 苗德俊 宋大川[2] GAO Xin;MIAO Dejun;SONG Dachuan(State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology,Shandong University of Science and Technology,Qingdao 265590,China;College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [2]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤矿安全》2018年第12期75-78,共4页Safety in Coal Mines

摘　　要：针对郓城煤矿深部主体结构复杂,地应力较高,煤矿投产开采期间冲击地压显现频繁的问题,综合现场调研,利用3DEC建立离散单元二维数值模型,同时进行相似模拟仿真,分析了郓城煤矿一采区回风四岔口冲击地压事故的致灾机制,结合巷道平动式动力失稳模型,探究深部煤层冲击地压致灾机理和防治方法。研究结果表明:深部煤层积聚的高应力是导致冲击地压发生的主要原因,提出以应力控制为中心,采取不同钻孔布置方式并合理布置爆破点进行卸压的防治方法,有效释放解危区内积聚的高应力,减弱应力连续传递能力,消散积聚的高能量,也可使巷帮煤体的应力得到释放,通过现场实践应用,卸压效果明显。In view of the problems of complex structure of deep body, high ground stress and frequent of impact ground pressure during coal production and mining in Yuncheng Coal Mine, combined with field investigation, 3 DEC is used to establish the numerical model of two-dimensional discrete element. At the same time, a similar simulation was carried out to analyze the disaster mechanism of rock burst in the fourth fork of return wind roadway of Yuncheng Coal Mine, combined with the dynamic instability model of the roadway, the disaster-causing mechanism and prevention method induced by deep coal seam rock burst are explored. The results show that: the high stress accumulated in deep coal seam is the main cause of the impact pressure. This paper proposes the prevention and treatment method of pressure relief by taking stress control as the center, adopting different borehole layout methods and rationally arranging blasting points. It can effectively release the accumulated high stress in the clearance area, weaken the continuous stress transfer capacity and dissipate the accumulated high energy, which can also release the stress of the roadway coal body. Through field practice and application, the pressure relief effect is obvious.

关 键 词：深部冲击地压 数值模拟 巷道 应力控制 钻孔爆破卸压 

分 类 号：TD324[矿业工程—矿井建设]