新强煤矿沿空留巷巷旁充填体参数确定

The Parameter Determination of Roadside Packing Body in Gob-side Entry Retaining

通过对巷旁充填体内应力的分布分析,计算出沿空留巷顶板压力及浆液扩散半径;并对现场沿空留巷巷旁充填体进行试验观测,研究巷旁充填体参数及巷旁充填体承载特性,对充填体变形特征、充填体受力特征、巷道围岩变形特征进行了分析。结果表明:充填浆液的扩散半径大致为5 m左右;随着距离回采工作面距离的不同,巷旁充填体内载荷的变化趋势大致可分为3个阶段;留设巷道顶底板的活动剧烈程度与工作面距离有关,进而导致巷道顶底板移近量不同。

The serum diffusion radius and the roof pressure are calculated in retaining entry through the stress distribution analysis of roadside packing body.Then,the deformation and load characteristics of filling body and the deformation characteristics of roadway surrounding rock are analysised by the experimental observations,the parameter analysis and the bearing characteristics of roadside packing body.The results showed that the serum diffusion radius is approximately 5 m,the trend of load in roadside packing body can be divided into 3 stages as different distance with working face,the activity degree of roof and floor is related to the distance with working face.Furthermore,it lead to different displacement from roof to floor.