CAJ | 학술논문

长壁开采后遗留了大量的不规则块段，回收这部分煤炭资源主要是通过以连续采煤机为主的短壁块段式开采。区段保护煤柱的稳定与否是不规则块段安全开采的关键。根据同煤集团某矿2-2上煤层的地质条件，运用突变理论分析了煤柱失稳机理，推导出区段煤柱发生突变失稳的必要条件为煤柱屈服区宽度大于煤柱总宽度的86%，数值模拟计算结果验证了该结论，并直观地模拟了煤柱与采场变形破坏的动态演化过程。通过在该矿区段煤柱的应用实施，煤柱不发生突变失稳的理论计算结果为其塑性区宽度不得大于12.9 m，现场钻孔窥视实测结果验证了该结论。
장벽개채후유류료대량적불규칙괴단，회수저부분매탄자원주요시통과이련속채매궤위주적단벽괴단식개채。구단보호매주적은정여부시불규칙괴단안전개채적관건。근거동매집단모광2-2상매층적지질조건，운용돌변이론분석료매주실은궤리，추도출구단매주발생돌변실은적필요조건위매주굴복구관도대우매주총관도적86%，수치모의계산결과험증료해결론，병직관지모의료매주여채장변형파배적동태연화과정。통과재해광구단매주적응용실시，매주불발생돌변실은적이론계산결과위기소성구관도불득대우12.9 m，현장찬공규시실측결과험증료해결론。
A lot of residual coal pillars of irregular blocks coal resources were left after longwall mining. These coal resources are mainly exploited by the short-wall mechanized block mining technol-ogy, using continuous miner. Whether the section coal pillar is stable or not is the key to safety of irre-gular blocks coal mining. According to the geological production conditions of the 2-2 seam in Datong Coal Mine Group,catastrophe theory has been applied to analyze the catastrophe instability mechanism of section coal pillars. The essential condition for catastrophe instability of section coal pillars has been derived:when plastic zone width of coal pillar is more than 86%. The numerical simulation results will conform to the observations. The dynamic evolution process of failure in section coal pillars and stope has been simulated . Taking the section coal pillar in Datong Coal Mine as an example, the theoretical calculation results for catastrophe instability is that plastic zone width of coal pillar should be no more than 12.9 m, which is consistent with drilling peep experimental results.