残采煤柱工作面冲击地压危险性分析与防治技术

Danger analysis and prevention technology of mine pressure bump from residual coal pillar mining face

为有效防治田陈煤矿512残采煤柱工作面回采期间发生冲击地压,采用综合指数法和可能性指数法对冲击危险性进行了宏观预测,采用多因素耦合评价法划分了冲击危险区及危险程度,并提出了冲击地压防治措施。结果表明,512残采煤柱工作面具有"强冲击危险",发生冲击地压的可能性为"很可能",具有4个中度危险区和3个高度危险区;通过超前实施预卸压措施和回采过程中开展微震监测和应力动态监测,并对冲击危险预警区域实施煤粉检验和解危措施,实现了512残采煤柱工作面的安全回采。实践表明,通过对残采煤柱工作面冲击危险性进行宏观预测和划分冲击危险区及危险程度,并采取"预卸压—监测预警—检验—解危"的冲击地压治理程序,可有效防止残采煤柱工作面冲击地压的发生。

In order to effectively prevent the mine pressure bump occurred during the mining period of No. 512 residual coal pillar mining face in Tianchen Mine, the comprehensive index method and the possibility index method were applied to the macro prediction of the mine pressure bump danger. The multi factor coupling evaluation method was applied to divide the mine pressure bump danger area and danger degree and the mine pressure bump prevention and control measures were provided. The results showed that No. 512 residual coal pillar mining face would have ＂ strong pressure bump danger＂ ,the possibility to cause the mine pressure bump would be ＂ probable＂ with four medium danger zones and three high danger zones. With the advance conducted pressure pre-re[eased measures and the microseism moni- toring and the stress dynamic monitoring and measuring conducted during the mining process, with the coal dust detection and danger relea- sing measures conducted in the mine pressure bump early warning area, a safety mining of No. 512 residual coal pillar mining face was re- alized. The practices showed that the macro prediction on the mine pressure bump danger of the residual coal pillar mining face and the di- vision on the pressure bump danger zones and danger degree, a mine pressure bump control procedure with the ＂ pressure pre-released- monitoring,measuring and early warning-inspection-danger released＂ conducted could effectively prevent the mine pressure bump occurred in the residual coal pillar mining face.