布尔台矿水力压裂对矿压显现影响分析  

Influence of Hydraulic Fracturing on Strata Behavior in Buertai Coal Mine

作　　者：任永强[1] 牛同会 REN Yongqiang;NIU Tonghui(Buertai Coal Mine,China Shenhua Shendong Coal Group Co.,Ltd.,Ordos 017209,China)

机构地区：[1]神东煤炭集团有限责任公司布尔台煤矿,内蒙古鄂尔多斯017209

出　　处：《煤矿安全》2020年第3期184-187,共4页Safety in Coal Mines

摘　　要：针对布尔台煤矿42106综放工作面回采期间发生多次动力灾害显现,为了分析水力压裂对强矿压显现的影响,采用了现场实测及理论分析方法,依据水力压裂卸压机理及矿压岩层控制理论,对该工作面回风巷上覆岩层实施水力压裂卸压。结合现场监测矿压显现变化情况对卸压机理及效果进行深入分析,其结果揭示了在强动压影响下的巷道顶板岩层中采取水力压裂可有效减弱顶板岩层中赋存的高应力,释放顶板储存的弹性能;弱化基本顶,避免采空区后方悬顶,降低超前支撑压力的影响;减小相邻采空区侧对工作面回采巷道的影响,有效缓解巷道围岩变形。In view of the multiple occurrences of dynamic disasters during the stoping of 42106 fully mechanized caving face in Buertai Coal Mine,in order to analyze the influence of hydraulic fracturing on strong pressure development,field measurement and theoretical analysis methods were adopted.Based on the mechanism of hydraulic fracturing and the theory of pressure control,the overburden strata in the return roadway of the working face were hydraulic fracturing and pressure relief.The mechanism and effect of pressure relief are analyzed in combination with the changes in the field monitoring of mine pressure.The results reveal that hydraulic fracturing under the influence of strong dynamic pressure can effectively weaken the high stress in roof strata and release the elastic energy stored in roof strata.Weaken the basic roof,avoid the rear hanging roof of goaf,and reduce the influence of leading support pressure;the influence of adjacent goaf on mining roadway of working face is reduced and surrounding rock deformation of roadway is alleviated effectively.

关 键 词：水力压裂 矿压显现 岩层控制 卸压 动压影响 

分 类 号：TD323[矿业工程—矿井建设]