综采工作面沿空留巷围岩稳定性控制技术

Stability control technique of surrounding rock of gob-side entry retaining on fully-mechanized working face

针对新景煤矿7211工作面生产地质条件,通过现场调研、理论分析、数值模拟及实验室测试等研究方法,对沿空留巷无煤柱护巷技术进行了深入分析研究,确定了以预应力锚杆锚索锚网巷内支护技术作为基本支护、锚索补强支护和充填体承载相结合的留巷支护方案,并在现场进行了工业性试验,取得了较好的效果。

Based on the production and geological conditions of 7211 working face of Xinjing Coal Mine,tech- nique of gob-side entry retaining without coal pillar porting was analysed in detail,the supporting scheme was al- so determined,including the basic supporting by using prestressed anchor and anchor cable, strengthening sup- porting by using anchor cable,and backfill bearing used in roadway.Industrial trials were carried out in the field, and achieved good effects.