沿空留巷工作面切顶卸压护巷技术研究  

Research on technology of cutting top and relieving pressure for roadway protection along gob retaining working face

作　　者：董志伟 DONG Zhiwei(Heshun new earth coal industry Co.,LTD,Yangquan Coal Industry Group,Jinzhong 030600,China)

机构地区：[1]阳泉煤业集团和顺新大地煤业有限公司,山西晋中030600

出　　处：《煤矿现代化》2025年第3期117-122,共6页Coal Mine Modernization

摘　　要：为有效解决新景煤矿采煤工作面沿空留巷变形量大的问题,利用高压水利压裂钻孔对留巷段煤壁顶板进行切顶卸压的措施。通过对顶板围岩的岩性分析及实验测定围岩物理特性参数,确定施工单排压裂钻孔进行卸压。经过应用效果检验,顶板上围岩浅部动压变化为14~16 MPa,围岩深部压力变化为19~21 MPa,且深部压力显现较集中,稳定时间更长,具有动压向岩层深部转移的显著效果;同时通过回采段巷道的围岩观测,在采取压裂切顶措施前,同等回采条件下巷道顶板移近最大值0.53 m,底鼓移近最大值1.4 m,帮鼓移近最大值0.67 m,采取切顶措施后,顶板移近量最大达到0.14 m,底鼓量达到0.22 m,两帮巷道最大移近量达到0.28 m,巷道变形量明显改善,留巷效果达到预期要求。In order to effectively solve the problem of large deformation of goaf retaining roadway in Xinjing Coal Mine,high-pressure hydraulic fracturing drilling is used to cut the roof of the coal wall in the retaining roadway section and relieve pressure.By analyzing the lithology of the surrounding rock of the roof and measuring the physical characteristics parameters of the surrounding rock through experiments,the construction of a single row of fracturing boreholes is determined for pressure relief.After application effect testing,the shallow dynamic pressure change of the surrounding rock on the roof is 14-16 MPa,and the deep pressure change of the surrounding rock is 19-21 MPa.Moreover,the deep pressure shows more concentration and has a longer stable time,which has a significant effect of transferring dynamic pressure to the deep rock layer;At the same time,through the observation of the surrounding rock in the mining section of the roadway,before adopting the fracturing and roof cutting measures,under the same mining conditions,the maximum displacement of the roadway roof is 0.53 m,the maximum displacement of the bottom bulge is 1.4 m,and the maximum displacement of the side bulge is 0.67 m.After adopting the roof cutting measures,the maximum displacement of the roof is 0.14 m,the maximum displacement of the bottom bulge is 0.22 m,and the maximum displacement of the two sides of the roadway is 0.28 m.The deformation of the roadway is significantly improved,and the effect of retaining the roadway meets the expected requirements.

关 键 词：沿空留巷 切顶卸压 水力压裂 巷道支护 

分 类 号：TD322.5[矿业工程—矿井建设]