晋华宫矿大采高工作面临空小煤柱巷道变形规律研究

Research on Deformation Law of Small Coal Pillar Gob-side Roadway in Large Mining Height Face of Jinhuagong Mine

针对大同矿区坚硬顶板条件下大采高工作面临空小煤柱巷道回采过程中围岩变形问题,采用FLAC;数值模拟和工程实践方法,研究了6 m小煤柱工作面回采过程中煤柱应力场分布和临空巷道超前范围内位移变化,得到了小煤柱应力分布规律和临空巷道围岩位移规律,并通过现场实测进行了验证。

Aiming at the problem of surrounding rock deformation during the mining process of small coal pillar gob-side roadway in the large mining height work under the condition of hard roof in Datong mining area, using the methods of FLAC;numerical simulation and engineering practice, the stress field distribution of coal pillar and the scope of displacement change within the advance range of gob-side roadway in the mining process of 6 m small coal pillar working face are researched, the stress distribution law of small coal pillars and the displacement law of the surrounding rock of the roadway are obtained, and verified by on-site measurement.