临空区回采巷道优化布置防冲技术研究及应用

为提前预防临近采空区侧回采巷道发生的冲击矿压灾害,基于临空区回采巷道冲击破坏机理,提出了降低静载以避开支承应力集中区为原则、削弱动载以增大传播介质衰减指数为原则的临空区巷道优化布置方式,建立了力学模型,理论计算了外错布置的布置参数,并通过数值模拟方法对其进行验证,对比分析了2种不同布置方式的所受动静载情况.结果表明:采用外错布置方式后围岩稳定性好、抗矿震扰动能力强,结合现场工程实践,采用外错布置技术取得了明显有效的防冲效果,实证了其在冲击矿压防治方面的突出性.

Study on rock burst prevention of optimized roadway near the goaf and its application

In order to prevent rock burst hazard of roadway near the goaf in advance, the optimized layout mode of roadway near the goaf was purposed, to reduce static load of avoiding concentration area of bearing stress, and to weak dynamic load of increasing attenuation coefficient of the propagation medium, based on the mechanism of rock burst failure for roadway near the goaf. Mechanic model was built to calculate the layout. And with the numerical simulation method, the parameter was proved. The result show that stability of the surrounding rock and the ability of disturbance rejection with the roadway by lateral layout mode are enhanced. Then based on site practice, the technology is achieved obviously effect and the prominence to prevent rock burst is proved.