小煤柱沿空掘巷采动应力研究及支护对策

Study on Mining Stress and Support Measure of Gob-side Entry Driving with Small Pillar

以金晖万峰煤矿为研究背景,基于小孔径水压致裂法与钻孔触探法测得的研究区域原位地质力学参数,采用有限差分数值计算软件FLAC^(3D)模拟分析1201工作面进风顺槽(沿空掘巷巷道)7 m小煤柱条件下采动应力演化规律,并确定小煤柱中性面位置,从而提出针对性的支护措施,在井下进行工业试验,并取得较好效果。

Based on the geomechanical parameters of Jinhui Wanfeng coal mine measured by hydraulic fracturing in-situ stress measurement techniques and in-situ rock strength measurement techniques with contact detection method in small holes, the finite difference numerical calculation software FLAC3D was used to simulate the evolution law of mining-induced stress of 1201 gateway （roadway driving along goat） with 7 m small coal pillar. And the position of neutral plane was studied. Therefore, the support measure was put forward, and the field test proved the support measure was effective and was worth promoting.