CAJ | 학술논문

针对强膨胀性极破碎围岩半煤岩巷出现的大底臌、折帮和顶板下沉等变形破坏和支护困难的问题，运用力学理论分析、数值模拟分析和现场试验研究相结合的方法，研究了巷道变形破坏机理及其控制策略。研究表明：在原以工字钢拱架为主的被动支护条件下，巷道变形破坏受到吸水膨胀、软弱夹层、节理等弱结构面多重影响，巷道变形破坏严重。提出了“全断面锚索＋金属网、钢带、梯子粱”联合支护，经过现场实践，掘进巷道在新方案支护183天后，两帮、顶底板收敛变形明显减小，变形处于相对稳定状态，达到了支护效果。
침대강팽창성겁파쇄위암반매암항출현적대저고、절방화정판하침등변형파배화지호곤난적문제，운용역학이론분석、수치모의분석화현장시험연구상결합적방법，연구료항도변형파배궤리급기공제책략。연구표명：재원이공자강공가위주적피동지호조건하，항도변형파배수도흡수팽창、연약협층、절리등약결구면다중영향，항도변형파배엄중。제출료“전단면묘색＋금속망、강대、제자량”연합지호，경과현장실천，굴진항도재신방안지호183천후，량방、정저판수렴변형명현감소，변형처우상대은정상태，체도료지호효과。
Aiming at the problems of deformation and failure such as large floor heave , rib spall and roof fall exist-ing in half coal rock roadway under extremely fractured surrounding rock with strong dilatability and difficult sup -port , the deformation mechanism and control strategy of roadway were researched by the combination of mechanical theory analysis , numerical simulation and field test .The results showed that under the original passive support form of arch beam , the deformation and failure of roadway were influenced by multiple effects of water absorption expan-sion, weak interlayer, joints and so on, and the deformation and failure of roadway were serious .The combined support scheme of "full section cable+metal net, steel strip and ladder beam"was put forward .Through the field test by the new scheme , the convergence and deformation in two sides , roof and floor of excavation roadway reduced significantly 183 days later , the deformation was in a relatively stable state , and the support effect was achieved .