采空区煤柱下沿空留巷围岩破坏特征和控制技术研究

Research on surrounding rocks failure characteristics and control technology of gob-side entry retaining under the coal pillar in gob

中兴煤矿1204下工作面开采2#下煤层,与2#煤层间距3m左右,巷道顶板薄、破碎,基于中兴煤矿1204下工作面材料巷沿空留巷工程实践,结合UDEC数值模拟对采空区煤柱下沿空留巷围岩破坏特征进行了研究,并提出用短锚索对巷道进行支护,取得了良好的效果。

The lower 2^# coal seam was mined in lower 1204 working face of Zhongxing Coal Mine, which was 3 meters away from 2^# coal seam, the roadway roof was thin and broken. Based on the gob-side entry retaining engineering practice of material roadway in the lower 1204 working face, and combined with UDEC numerical simulation, the surrounding rocks failure characteristics of gob-side entry retaining under the coal pillar in gob were studied, and proposed that short anchors should be adopted to support roadways, and this research had achieved a favorable effect.