保护煤柱卸压爆破技术研究及应用

Research and application of coal pillar pressure relief blasting technology

根据贺西煤矿实例,介绍煤矿卸压爆破技术研究及其应用。针对保护煤柱内高应力集中造成巷道支护后难以稳定的问题,应用卸压爆破控制巷道围岩变形机理,确定合理的爆破参数。通过卸压爆破,改变围岩应力分布,使围岩内高应力得到释放和转移,有效消除巷道围岩应力集中,保持巷道稳定。

This paper introduces research and application of pressure relief blasting technology based on case study in coal mines.Focusing on the instability of drifts and tunnels after support is done due to the concentration of high stress within coal pillars,the authors advocate pressure relief blasting to control the surrounding rock deformation and determining proper blasting parameters.By applying relief blasting,surrounding rock stress distribution is transformed,the high stress are released and transferred,thus the drift and tunnel stability is maintained.