水力压裂护巷煤柱卸压机理与工程应用

以新元公司9108工作面回风顺槽水力压裂卸压为工程背景,通过理论分析,得出了煤柱体上部基本顶悬伸部分长度过大是导致护巷煤柱变形的主要原因,然后通过水力压裂技术来对煤柱上部顶板进行压裂,使得顶板在工作面回采后能够及时垮落,不会形成悬顶效应,减小对煤柱体的压力,从而保护护巷煤柱,使得下一工作面在回采时巷道围岩变形量保持在可控范围之内,从而减少了巷道维护成本。

Pressure Relief Mechanism and Engineering Application of Coal Pillar in Hydraulic Fracturing Roadway

Based on the engineering background of Xinyuan company 9108 auxiliary air intake roadway coal pillar hydraulic fracturing pressure relief, through theoretical analysis, it is concluded that the length of the basic top overhang part of the upper part of the coal pillar is too large, which is the main reason for the deformation of the coal pillar of the roadway, and then through the hydraulic fracturing technology, the upper roof of the coal pillar is fractured, so that the roof can collapse in time after mining in the working face, and there will be no overhang the roof effect can reduce the pressure on the coal pillar, so as to protect the coal pillar and keep the deformation of the surrounding rock within the controllable range when the next working face is mined, thus reducing the maintenance cost of the roadway.