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为解决综放开采沿空双巷和窄煤柱难维护问题,根据某矿3406综放工作面工程地质和开采技术条件,运用FLAC3D对采动影响下沿空双巷窄煤柱应力与位移的演化规律进行了数值模拟研究.结果表明,巷间煤柱应力随采动升高,采面推过时突然降低,应力峰值向瓦斯巷侧转移;沿空煤柱中心区应力因采动单调升高,应力峰值位于瓦斯巷侧;采面推过前两煤柱位移均较小,沿空煤柱水平位移中性线因采动而向瓦斯巷侧移动.根据研究成果和该矿工程地质条件,成功地进行了工程实践,解决了该矿综放沿空双巷难维护的问题,对综放开采技术的发展有深远意义.
In order to solve the difficult maintenance of double-lane and narrow pits in fully mechanized top-coal caving mining, according to engineering geology and mining technical conditions of No.3406 fully mechanized top caving mining face, the stress and displacement The results show that the stress of coal pillar in the lane increases with the mining operation, suddenly decreases when the mining face pushes over, and the stress peak shifts to the gas side of the roadway. The stress in the center of the coal pillar is monotonically increasing , And the stress peak is located on the gas side of the roadway.The displacement of the two coal pillars before passing the mining face is small and the horizontal displacement of the horizontal coal pillar moves to the gas side due to the mining.According to the research results and the engineering geological conditions, Successfully carried out engineering practice to solve the problem of difficult maintenance of the double-girded roadway in the fully mechanized top coal caving, which is of far-reaching significance for the development of fully mechanized caving mining technology.