深井三软煤层复合顶板下的沿空留巷

Gob-side Entry Retaining of Deep Mine Shaft Under Compound Roof and Three Soft Coal Seam

顾桥1115(1)工作面是典型的深井三软煤层,通过分析地质条件,采用锚杆锚索支护巷旁与顶板,使沿空留巷技术得以实现。结果显示,巷道前方顶板下沉量为257 mm,底鼓量为201 mm,两帮移近量在337 mm,后方顶板下沉量为238 mm,底鼓量为278 mm,两帮移近量为709 mm,移近量满足生产要求。

1115 （1） working face in Guqiao Coal Mine is typical deep mine shaft in three soft coal seam ,through the analysis of geolog- ical conditions, by using bolt and anchor cable to support roadside and roof, the field application about technology of gob-side entry re- taining was realized. Results have shown that,in front of the roadway,the sinkage of roadway roof is 257 mm,the amount of floor heave is 201 mm, the amount of two roadway moving is 337 mm, the rear roof subsidence is 238 mm, he amount of floor heave is 278 mm, the amount of two roadway moving is 709 mm. The quantity of these parameters have meet the needs of production requirements.