沿空留巷巷旁控制技术及其适用条件分析

Analysis on roadside control technology of gob-side entry retaining and applicable conditions

为了研究目前我国沿空留巷巷旁控制技术及其适用条件,笔者对150个沿空留巷巷道典型案例进行了分析,结果表明:目前主要应用的巷旁控制技术有高水材料充填、混凝土材料充填、膏体材料充填、块体类充填、矸石类充填、冒落矸石自然充填、切顶成旁支护技术等,其中高水材料充填、混凝土材料充填使用率最高;各巷旁控制技术的应用范围在煤层埋深、倾角、煤厚等3个地质条件上差别较大,在直接顶岩性和直接顶厚度上的差别较小。另外发现,高水材料充填、混凝土材料充填、膏体材料充填适用于深部及厚煤层条件,冒落矸石自然充填适用于大倾角、急倾斜条件。

In order to study the roadside control technology of the gob-side entry retaining and the applicable conditions in China,an analysis was conducted on the typical cases of 150 gob-side entry retaining. The result showed that the present applied roadside control technology could be divided to a high water material backfill,concrete backfill,paste backfill,lump material backfill,coal refuse backfill,falling waste rock natural backfill,roof cutting backfill and other types and among them,the high water material backfill and concrete backfill had the highest utilization rate. The application scope of each gateway roadside control technology would have big difference in three coal conditions of the seam depth,inclination and thickness and would have less difference in the immediate roof lithology and thickness. Also the practices found that the high water material backfill,concrete backfill and paste backfill could be applied under the deep mine and thick seam conditions and the falling rock waste natural backfill could be applied under the high inclination and steep inclination conditions.