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为了解决厚硬覆岩下沿空留巷侧向爆破断顶施工难度大、工艺复杂的问题,研究充填体在动静载荷下适应性,拟采用巷旁充填柔性材料(矸石)实现留巷.通过刚、柔性约束矸石体试验,分析了不同粒径及横向支护应力对其承载力的影响,掌握了袋装矸石单轴压缩应力应变关系;基于建立的沿空巷旁侧向覆岩结构模型,得到了充填体动静载荷计算方法.研究结果表明:巷旁充填矸石能适应侧向悬顶旋转断裂产生的动静载荷,且施工简单,对厚硬及其类似覆岩下沿空留巷支护设计的确定提供了科学依据.
In order to solve the problem that the side blasting of the gob-side entry retaining roadway with thick and hard surrounding rock is difficult and complicated in technology, the adaptability of the filling body under the static and dynamic loads is studied and the laneway filling with flexible material (waste rock) , Flexible constraint gangue test, the effect of different particle size and lateral support stress on its bearing capacity was analyzed, and the uniaxial compressive stress and strain relationship of bagged gangue was mastered. Based on the model of lateral overburden beside gob-side entry, The calculation method of the dynamic and static load of the filling body is obtained.The results show that the roadside filling waste rock can adapt to the dynamic and static loads caused by the lateral suspended roof rotating fracture and the construction is simple. Determined to provide a scientific basis.