留设窄煤柱维护大巷技术

Narrow coal pillar left to facilitate trunk roadway maintenance

针对薄煤层开采中,沿煤层开掘的巷道留煤柱护巷造成大量的煤炭储量浪费问题,提出留设窄煤柱维护大巷技术,巷道采用锚喷网支护,延长了矿井服务年限和提高了矿井整体效益,可在类似条件下推广应用。

In mining in thin coal seams, coal pillars left along the drifts or roadways opened up in coal seams always waste large amount of coal reserves which is left to protect the coal drifts and roadways. In order to solve this problem, this paper proposes that narrow coal pillars are to be left to protect the main drift or roadways. On the other hand, bolt--net--shotcrete is used for roadway support, which improves the service life of the mine as well as the overall economic prof- itability of the mine. This practice is of value for spread use in coal mines with similar conditions.