CAJ | 학술논문

针对滨湖煤矿上覆遗留煤柱下方复杂不规则孤岛工作面冲击危险性提出了基于应力分析的冲击危险评价方法,根据煤岩冲击倾向性与破裂模式,制定了评价冲击危险的应力判别等级与指标,确定了滨湖煤矿冲击临界应力为70 MPa.将冲击危险性分为4级,小于50 MPa 为无冲击危险,50~70 MPa 为弱冲击危险,70~105 MPa 为中等冲击危险,大于105 MPa 为强冲击危险.模拟了孤岛工作面原岩应力与支承压力分布规律,对孤岛工作面冲击危险进行了评价与分区.工作面回采过程中,利用钻孔应力计与钻屑法进行监测,结果表明,利用应力分析法确定的冲击危险区域与危险等级精确度高.
침대빈호매광상복유류매주하방복잡불규칙고도공작면충격위험성제출료기우응력분석적충격위험평개방법,근거매암충격경향성여파렬모식,제정료평개충격위험적응력판별등급여지표,학정료빈호매광충격림계응력위70 MPa.장충격위험성분위4급,소우50 MPa 위무충격위험,50~70 MPa 위약충격위험,70~105 MPa 위중등충격위험,대우105 MPa 위강충격위험.모의료고도공작면원암응력여지승압력분포규률,대고도공작면충격위험진행료평개여분구.공작면회채과정중,이용찬공응력계여찬설법진행감측,결과표명,이용응력분석법학정적충격위험구역여위험등급정학도고.
Aiming at the rock burst danger evaluation in complex and irregular island workG ing face under overlying coal pillar in Binhu Coal Mine,rock burst danger evaluation methods based on stress analysis were put forward?? According to coal and rock burst tendentiousness and mode,the stress discrimination grade and index of rock burst danger was formulated,and conG firmed that the rock burst critical stress of Binhu Coal Mine was 70 MPa?? The rock burst danger was classified into 4 levels,there was no rock burst danger when the stress was less than 50 MPa,and there was a weak rock burst danger when the stress was from 50 MPa to 70 MPa,then there was a medium rock burst danger when the stress was from 70 MPa to 105 MPa,finally there was a strong rock burst danger when the stress was more than 105 MPa?? The distribution regularities of primary rock stress and support pressure in island working face were simulated, and the rock burst danger was evaluated and zoned?? In the mining process of working face,boreG hole stressmeter and drilling method were using to monitor,and the results showed that the acG curacy of rock burst dangerous zones and danger level determined by stress analysis method was high.