浅埋煤层旺采区下长壁开采压架机理及防治技术

Mechanism of Support Crushing and Prevention Technology of Shallow Depth Seam under Wongawilli Mining Goaf

依据对浅埋煤层开采下压架机理已有的认识,对大柳塔煤矿22103综采面旺采区下开采发生的3次较大范围来压事故原因进行分析,并提出相应的防治对策。结果表明:旺采区上部覆岩在一定的采高范围内存在叠合梁结构,上位悬臂梁与下位悬臂梁失稳的不同周期性是长壁工作面支架失稳的主要原因之一。

According to the understanding of the mechanism of support crushing of shallow depth seam,the cause of the three ground pressure accident occurring in a wide range in No.22103 fully mechanized coal mining face of Daliuta coal mine was analyzed. The relative prevention and control measures were provided. The results showed that upper overburden on the wongawilli mining goaf have composite beam structure in certain caving height range ,different instability periodicity of upper fixed beam and under cantilever beam is one of the main causes of support buckling in long-wall working face.