大寒岭倒转背斜复杂煤层结构冲击地压研究

The Study of the Rockburst of Dahanling Overturned Anticline Complex Coal Seam Structure

受大寒岭倒转背斜的影响,大安山煤矿14槽煤后槽形成了极为复杂的煤层结构,其轴部及附近和两翼形成的急倾斜煤层是高应力区,具有冲击倾向性。首先用ANSYS有限元软件建立了包括复杂煤层结构在内的矿山模型,利用单元生死技术模拟轴部及右翼开挖;在此基础上,分析了采场围岩的应力场和位移场,圈定了冲击地压发生的危险区域,分析了冲击地压发生的机理;预测了14槽煤后槽开采的冲击倾向性,并指出在实际开采时,必须采取防冲措施,为避免冲击地压事故的发生提供了技术支持,具有一定的参考价值。

Affected by Dahanling overturned anticline,complex structure developed in the hinterdeep of the fourteen coal seam,and the steeply inclined seam near axis and two wings of the anticline is the high stress section,with the preference of bursting.Firstly,mine model including complex coal seam structure is established using ANSYS finite element software,and the excavation of the right wing and the axis is simulated utilizing element birth and death technology,Secondly,the stress and displacement of the surrounding rock is analyzed.Thirdly,the dangerous section of rockburst is identified,and finally the occurrence mechanism of rockburst is studied.Result shows that the hinterdeep of the fourteen coal seam has the preference of bursting,so the work against rockburst must be carried out before mining.This research provides a theoretical technical support for avoiding rockburst accident,and is of important value for reference.