摘要
麦捷煤业正在开采的15煤层顶板比较坚硬,回采巷道需要留设30 m煤柱支撑。为了减少巷道的变形和煤柱的预留量,决定对回采巷道进行切顶卸压。结合150505综放工作面的地质条件,对切顶的参数和施工工艺进行了设计。通过数值模拟可以发现,在切顶高度为17 m时,煤层坚硬顶板被完全切断,小煤柱巷道周边的应力明显降低,可以为综放工作面的切顶卸压设计提供一定的参考。
The roof of 15 coal seam under mining in Maijie Coal Industry is relatively hard, and the mining roadway needs to be supported by 30 m coal pillar. In order to reduce the deformation of the roadway and the reserved amount of coal pillar, the roof cutting and pressure relief of the mining roadway are decided. Combined with the geological conditions of150505 fully mechanized caving face, the parameters and construction technology of roof cutting were designed. Through numerical simulation, it can be found that when the roof cutting height is 17 m, the hard roof of coal seam is completely cut off, and the stress around the small coal pillar roadway is significantly reduced, which can provide certain reference for the roof cutting and pressure relief design of fully mechanized caving face.
作者
贺龙
He Long(Shanxi Shouyang Luyang Maijie Coal Industry,Jinzhong 045400,China)
出处
《煤炭与化工》
CAS
2022年第9期30-33,共4页
Coal and Chemical Industry
关键词
综放开采
切顶卸压
数值模拟
煤柱
fully mechanized caving mining
top cutting pressure relief
numerical simulation
coal pillar
