CAJ | 학술논문

以乌东煤矿88°急倾斜特厚煤层水平分段工作面开采过程中发生的一起冲击地压案例为背景，依据微震监测结果，确定了B2－B3煤层之间岩柱活动是诱发冲击地压的主要危险源，采用岩层空间结构破断和强度弱化防冲思想，开展了岩柱地面爆破和井下注水的现场实践，对近百米厚、数百米高的岩柱进行了空间结构破断和回采水平强度弱化。实践表明，地面爆破有效改善了岩柱应力分布和集中程度，注水有效降低了岩柱能量积聚及其活动的剧烈程度，效果检验表明冲击地压得到了有效防治。
이오동매광88°급경사특후매층수평분단공작면개채과정중발생적일기충격지압안례위배경，의거미진감측결과，학정료B2－B3매층지간암주활동시유발충격지압적주요위험원，채용암층공간결구파단화강도약화방충사상，개전료암주지면폭파화정하주수적현장실천，대근백미후、수백미고적암주진행료공간결구파단화회채수평강도약화。실천표명，지면폭파유효개선료암주응력분포화집중정도，주수유효강저료암주능량적취급기활동적극렬정도，효과검험표명충격지압득도료유효방치。
For a rock-burstoccurred in horizontal slice mining face in steeply-inclined and extremely-thick coalseam of Wudong Collier-y, micro-seismic monitoring result showed that rock pillar between B2 coalseam and B3 coalseam was the main rockburst danger source.Applying rock strata structure breakage and strength weakening thinking, surface blasting and underground water injection of rock pillar was practiced.Monitoring results showed that surface blasting and underground water injection effectively reduced energy and stress concentration degree of rock pillar, and that rock-burst was prevented effectively.