为了实现坚硬直接顸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2m时,充填体静载荷为816kN/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。
In order to achieve gob-side entry retaining with flexible filling body (filling gangue) under condition of hard and direct roof, uniaxial compression characteristics of sacked gangue body are gained by experiment, combined with the establishment of lateral overlying strata's constructional model alongside gob side entry retaining, static load caused by overlying strata movement is quantitatively calculated. Dynamic effect of constructional model of roof is studied by means of dynamics, and dynamic load is quantitatively calculated. Thus, when filling width is designed as 2 meters, static load of filling body is 816 kN/m, and dynamic load is 257.3 kN/m with limestone's fracture near the coal wall. Supporting demand of static load and dynamic load are satisfied by flexible filling body.