摘要
孤岛工作面由于高应力存在,容易造成巷道、工作面大变形等问题。以山西晋煤集团翼城晟泰青洼煤业2102工作面为工程背景,为解决青洼煤业生产接续的问题,拟采用水力压裂技术对青洼煤业2103工作面运输顺槽进行切顶卸压,通过FLAC3D软件模拟不同切顶高度情况下对煤柱及巷道围岩的影响,选出合理的切顶高度;并分析2102工作面新掘进风顺槽在新提出的支护方案下巷道的围岩变形情况,验证方案的合理性。通过方案的实施和监测,证明切顶卸压可切断采空区顶板与留巷顶板间的应力传递,削弱采空区侧上覆岩层对2102工作面进风顺槽产生的附加应力,达到控制巷道变形以及维护其稳定性的目的。
Because of the high stress in the island working face,it is easy to cause large deformation of roadway and working face.Jin coal group in Shanxi Yicheng Shengtai Qingwa Coal 2102 working face as the engineering background,in order to solve the problems of the green depression in place of coal production,proposed using hydraulic fracturing technology to relieve 2103 mining face of Qingwa coal transport gateway roof.By FLAC3D,it is supposed to simulate different top height cases of coal pillars and the influence of the surrounding rock of roadway,select reasonable cut top height;the surrounding rock deformation of the roadway under the newly proposed support scheme for the wind chute of 2102 working face is analyzed to verify the rationality of the scheme.Through the implementation and monitoring of the scheme,it is proved that the stress transfer between the goaf roof and the retaining roadway roof can be cut off by cutting the pressure,and the additional stress generated by the overlying strata on the goaf side to the inlet channel of 2102 working face can be weakened,so as to control the roadway deformation and maintain its stability.
出处
《科技创新与应用》
2020年第5期1-6,9,共7页
Technology Innovation and Application
关键词
动压巷道
切顶卸压
水力压裂
数值模拟
dynamic pressure tunnel
cutting top pressure relief
hydraulic fracturing
the numerical simulation
