Shanxi Coking Coal Xishan Coal Electricity Tunlan Mine

为增加煤炭资源回收率,减缓矿井采掘紧张的局面,对18403采煤工作面通过补强锚索支护、预裂切顶、挡矸支护和临时支护对留巷围岩进行综合控制,实现了无煤柱开采,煤炭资源回收率提高了7%,多回收煤炭资源78万t。

In order to increase the recovery rate of coal resources and ease the tight situation of mining and excavation in the mine, comprehensive control is carried out on the surrounding rock of the remaining roadway in the 18403 coal mining working face through reinforcement of anchor cable support, pre splitting and roof cutting, gangue retaining support and temporary support, realizing non coal pillar mining. The recovery rate of coal resources is increased by 7%, and 780000 tons of coal resources are recovered more.