沿空留巷巷旁支护体宽度的合理确定

 巷旁支护体是沿空留巷围岩控制的关键，在充填材料力学性能和巷道高度确定的情况下，巷旁支护体的宽度就成了主要影响因数。本文以焦煤集团九里山煤矿巷旁充填沿空留巷为工程背景，采用理论分析、数值模拟和现场试验相结合的方法，得出巷旁支护体合理宽度的确定方法。现场试验表明，采用该方法确定的巷旁支护体宽度在沿空留巷围岩趋于稳定后，巷道围岩及充填体稳定、变形量较小，说明采用该方法确定的支护体宽度科学合理，对沿空留巷实践具有一定的指导意义。

Rational Determination on Width of Support Mass along Side of Gateway Retained Goaf

The support mass at the gateway side is the key to the surrounding rock control of the gateway retained along the goaf.Under the determination of the mechanics performances of the backfill material and the height of the gateway,the width of the support mass along the gateway side would be the major influence factor.Taking the gateway side backfill of the gateway retained along goaf in Jiulishan Mine of Jiaozuo Coal Mining Group as the project background,the theoretical analysis,numerical simulation and the site test combined method was applied to get the determination method of the rational width for the support mass along the gateway side.The site test showed that After the surrounding rock of the gateway retained along the goaf were stabilized when the support mass width determined with the method,the surrounding rock of the gateway and the backfill mass would be stabilized and the deformation value would be small.Those could show that the width of the support mass determined with the method was scientific and rational and could have certain guidance to the practices of the gateway retained along goaf.