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为了实现坚硬直接顶板条件下沿空巷旁柔性充填体(充填矸石)承载留巷,试验得到了袋装矸石体的单轴压缩特征,结合建立的留巷巷旁侧向覆岩结构模型,定量计算了覆岩运动对巷旁充填体的静载荷;采用动力学的方法研究了顶板结构模型的动力效应,定量计算了动载荷。由此设计充填宽度为2 m时,充填体静载荷为816 kN/m,灰岩在煤壁附近断裂时的动载荷为257.3kN/m,柔性充填体能够满足覆岩静、动载荷支护要求。
The uniaxial compression characteristics of the bagged gangue body were obtained by experiment, in order to realize the flexible retaining body (filling waste rock) beside the gob next to the rigid direct roofing. Combined with the model of the lateral overburden structure beside the gob-side entry, the quantitative The static load of the roadside filling body was calculated. The dynamic effect of the roof structure model was studied by dynamic method, and the dynamic load was calculated quantitatively. From this, the dynamic load of limestone at the time of fracture near the coal wall is 257.3kN / m when the filling width is 2m, the static load of the filling body is 816kN / m, and the flexible filling body can meet the requirements of static and dynamic load supporting Claim.