陈家沟煤矿冲击地压巷道支护抗震性能评估

Evaluation of roadway support system under rockburst in Chenjiagou Coal Mine

基于冲击地压能量理论,推导冲击地压巷道在震源扰动时失稳冲击破坏的能量判别准则,提出冲击地压巷道支护能量评估方法,以支护系统吸收能量与冲击发生后巷道围岩释放能量为评价指标,对陈家沟冲击地压巷道支护能力进行计算评估。通过能量评估方法,结合陈家沟煤矿8514工作面巷道支护工程实践,假设发生最大能量为9.81×10^(4) J矿震事件,验证其冲击产生的能量完全可由支护系统吸收,支护参数满足抗冲要求。

Based on the energy theory of rockburst,this paper deduced the energy rule for the failure subjected to rockburst and roadway surrounding structure destruction,and put forward the energy evaluation method of rockburst roadway support:taking the energy absorbed by the support system and the energy released by the surrounding rock of the roadway after the rockburst as the evaluation index,calculating and evaluating energy absorption of roadway supporting system in Chenjiagou Coal Mine.Through the energy evaluation method,combining with the 8514 working face of Chenjiagou Coal Mine roadway support engineering application,assuming the maximum shock energy due to the tremor was 9.81×10^(4) J,it was verified that the energy produced by the impact could be absorbed by the supporting system,and the supporting parameters meet the requirements of rockburst resistance.