大兴煤矿大断面开切眼支护技术研究

Study on Support Technology of Large Cross Section Open-off Cut in Daxing Coal Mine

针对大断面切眼稳定性控制问题,以大兴煤矿2北303工作面切眼为研究对象,理论分析了围岩条件等开切眼稳定性的影响因素,采用FLAC^(3D)数值模拟软件研究了围岩破碎条件下大断面切眼的加强支护方案的可行性。现场实测数据表明,采用加强支护后,工作面切眼稳定性得到有效控制,围岩变形控制在200 mm以内。

Aiming at the stability control of large cross section cutting,taking the cutting of the No.2 North 303 working face in Daxing Coal Mine as the research object,the influence factors of open-off cut stability such as surrounding rock conditions are theoretically analyzed,and the feasibility of strengthening support scheme of large cross section cutting under the condition of broken surrounding rock is studied by using FLAC^(3D)numerical simulation software.The field measured data show that the stability of cutting hole in the working face can be effectively controlled and the deformation of surrounding rock can be controlled within 200 mm after strengthening support.