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综放工作面处于复杂构造应力区,为确定该区域地应力状况,采用空心包体应力解除法进行现场地应力实测,确定该区域为构造应力为主的高应力区。以地应力实测结果为依据,采用实测主应力大小和方向对数值计算模型进行初始地应力的加载,有效减小了由于不考虑构造应力导致模拟结果的误差;结合沿空巷道在掘进及回采过程的受力及变形演化机理,设计出沿空掘巷非对称支护方案,非对称支护中设计使用肩部锚索专用紧固构件,减小了锚索被剪断的几率,有效提高了锚索承载质量。工业性试验与矿压观测结果表明:在以构造应力为主的复杂应力区采用不对称支护技术,沿空掘巷支护效果良好,技术经济效益与社会效益显著。
The fully mechanized top coal caving face is located in complex tectonic stress area. In order to determine the geostress status of the area, the stress measurement of hollow enclave is used to measure the geo-stress of the site, and the tectonic stress is considered as the high stress area. Based on the measured results of in-situ stress, the initial stress is loaded on the numerical calculation model based on the measured principal stress magnitude and direction, which effectively reduces the error of the simulation results without considering the tectonic stress. Of the force and deformation evolution mechanism to design a roadway drivingway asymmetric support program, asymmetrical support designed to use the shoulder anchor dedicated fastening member, reducing the probability of being cut anchor, effectively improve the anchor Cable carrier quality. The results of industrial tests and strata pressure observations show that the asymmetrical support technology is adopted in the complicated stress zone with tectonic stress, and the support effect of roadway driving along next goaf is good and the technical economic benefits and social benefits are remarkable.