CAJ | 학술논문

在平面应变状态下利用Mohr-Coulomb 准则推导了采空区支承应力和采准巷道支承应力叠加时中央弹性核区的宽度，同时在计算中考虑了防水煤柱的宽度。在平面应变状态下利用Druker-Prager准则计算采准巷道塑性区的宽度，弥补了Mohr-Coulomb 准则塑性区宽度未考虑中间主应力和静水压力两因素。计算结果表明，贺西矿三采区采准巷道侧的塑性区宽度3.1 m，中央弹性核区的宽度1.7 m，旧采空区的塑性区宽度按风化后计算为16 m，在现场试验取得了较好的效果。
재평면응변상태하이용Mohr-Coulomb 준칙추도료채공구지승응력화채준항도지승응력첩가시중앙탄성핵구적관도，동시재계산중고필료방수매주적관도。재평면응변상태하이용Druker-Prager준칙계산채준항도소성구적관도，미보료Mohr-Coulomb 준칙소성구관도미고필중간주응력화정수압력량인소。계산결과표명，하서광삼채구채준항도측적소성구관도3.1 m，중앙탄성핵구적관도1.7 m，구채공구적소성구관도안풍화후계산위16 m，재현장시험취득료교호적효과。
Elastic central area width when bearing stress of goaf and bearing stress of preparation roadway superposed is derived by using Mohr-Coulomb criteria in plane strain state, at the same time the waterproof coal pillar width is taken into account in computing. Under the plane strain state Druker- Prager criterion is used to calculate mining roadway width of plastic zone, making up the Mohr -Coulomb criterion plastic zone width with not considering the factors of intermediate principal stress and static water pressure. The plastic zone width of preparation roadway side in the three mining area of the Hexi mine is 3.1 m, the central elastic core width is 1.7 m ,after weathering the plastic zone width of old goaf is 16 m, the field test achieved good results.