深井煤柱区冲击地压危险性分析与防治技术

摘要

In order to effectively prevent the strata pressure bump occurred when No. 3below 322 coal mining face passed through coal pillar zone in No. 3up seam,a theoretical analysis,engineering analogy and other methods were applied to a study the mine strata pressure bump-ing danger of the coal pillar zone and the prevention measures in combination with a micro seismic monitoring and measuring and fine coal inspection data. The results showed that under comprehensive influences of a mining depth,coal pillar,mining operation and other fac-tors,the solid sidewalls of the transportation gateway in the coal pillar area was a danger area of the mine strata pressure bumping. During the mining and pushing forward process of the coal mining face,a micro-seismic event was abnormally distributed. The cutting value of a borehole drilling was 1.6 times higher than the designed coal cutting value. The pressure released with intensive seam boreholes in advance of 60 m in the danger zone could effectively prevent the mine strata pressure bump occurred. The practices showed that with the analysis on the mine strata pressure bump danger in the coal pillar zone and the pressure released with the advance intensive seam boreholes conduc-ted,the coal mining face with a successful passed through the coal pillar zone could be ensured.%为有效防止田陈煤矿3下322工作面穿越3上煤层煤柱区时发生冲击地压，采用理论分析、工程类比等方法，并结合微震监测、煤粉检验数据，对煤柱区冲击地压危险性、防治措施进行研究。结果表明，开采深度、煤柱、采动等因素综合影响下煤柱区运输巷内帮为冲击危险区，推采过程中煤柱区微震事件分布异常，钻孔排粉量为设计煤粉量的1.6倍，通过超前60 m对危险区实施密集煤层钻孔进行卸压，有效防止了冲击地压的发生。实践表明，通过分析煤柱区冲击地压危险性并超前实施密集煤层钻孔卸压，可确保工作面顺利穿越煤柱区。