冲击危险性工作面巷道失稳原因及超前支护研究

Study on the Cause of Roadway Instability and Advance Support in Impact Dangerous Working Face

针对冲击危险性巷道稳定性差问题,采用理论分析、理论计算以及现场实测的研究方法,对小庄矿40207冲击危险性运输顺槽的失稳原因及超前支护展开研究。研究结果表明:回采期间,巷道受超前支承压力影响易产生巷道失稳现象;确定了超前150 m内采用超前防冲式液压支架。经现场实测,巷道顶底板移近量为48 mm,两帮移近量为43 mm。

Aiming at the poor stability of impact dangerous roadway, the causes of instability and advance support of the 40207 impact dangerous transportation channel in Xiaozhuang Coal Mine are studied by using the research methods of theoretical analysis, theoretical calculation and field measurement. The research results show that during the mining period, the roadway is easy to cause roadway instability due to the influence of leading abutment pressure,and the leading anti-impact hydraulic support is adopted within 150 m in advance. Through the field measurement,the approaching amount of the roof and floor of the roadway is 48 mm, and that of the two sides is 43 mm.