CAJ | 학술논문

平朔一矿为近距离4号及9号煤共采,研究了9号煤层巷道底板发生底鼓的主要原因,发现4号煤层高强度开采造成的采动应力导致采场围岩应力重新分布, 煤壁前方及底板应力集中的动态变化导致9号煤层出现应力集中,巷道围岩发生不同程度的破坏变形.
평삭일광위근거리4호급9호매공채,연구료9호매층항도저판발생저고적주요원인,발현4호매층고강도개채조성적채동응력도치채장위암응력중신분포, 매벽전방급저판응력집중적동태변화도치9호매층출현응력집중,항도위암발생불동정도적파배변형.
In No.1 Pingshuo Mine, close distance No.4 and No.9 coal seams are co-mined. The floor heave of the No.9 coal seam was studied. The results show that high-intense mining in the No.4 coal seam causes the mining stress and the redistribution of surrounding rock stress. Then the stress accumulated in front of coal walls and floor causes the stress concentration of the No.9 seam, with different levels of failure deformation of the surrounding rock.