急倾斜煤层护巷煤柱开采

Research on mining of protective pillar for steeply inclined coal seam

为有效回收急倾斜煤层开采时为保护巷道留设的煤柱,提高煤炭回收率和矿井经济效益,对长沟峪煤矿-140 m水平东一石门保护煤柱的开采进行理论研究和数值分析,实践成功地采出煤炭40余万吨,取得了较好的经济效益,为相似条件下保护煤柱的开采提供了理论依据,并具有借鉴作用。

In order to protect the coal pillar in the laneway, improve the coal recovery ratio and raise the mine economic effect, theoretical research and numerical analysis are researched based on mining of protective coal pillar in east-I cross-cut at-140m level in Changgouyu Colliery when inclined coal seam is mined. More than 40 million tons of coal has been excavated successfully with good economic benefit. It is provides theoretical basis for mining protective coal pillar under similar conditions and has reference uses.