摘要
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。
When the working face is in the complex tectonic stress area,in order to determine the area ground stress condition,the method of stress relief is used to determine the region of high stress mainly constituted by tectonic stress. Based on the in-situ stress test results,the stress intensity and direction are used to load the initial ground stress in the numerical calculation model, which effectively reduces the error of the simulation results without considering the tectonic stress.Combined with evolution mechanism of deformation and stress along the empty roadway, asymmetric supporting parameters has been designed.Using special anchor fastening shoulder artifacts effectively can reduce the chances of fracture anchor cables and improve the quality of the anchor cable bearing quality.The results of the industrial test and the rock pressure indicates that the asymmetric support scheme supporting effect is good in the complex tectonic stress mining area and has a remarkable economic and social benefit.
出处
《采矿与安全工程学报》
EI
北大核心
2014年第6期901-906,共6页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(51174196)
关键词
复杂构造应力区
沿空掘巷
非对称支护
地应力测试
complex high stress mining area
gob-side entry driving
asymmetric supporting
in-situ stress test
作者简介
作者简介：周钢（1956-），男，北京市人，高级工程师，研究生导师，从事岩石工程性质、矿山压力与岩层控制方面的研究。E-mail：zg2299@163．comTel：0516-83885178
