CAJ | 학술논문

深部大跨度硐室在高应力下常出现明显的围岩变形破坏，严重的会影响矿井的正常生产甚至引发事故。以新庄煤矿机头硐室受围压破坏变形为工程背景，分析机头硐室巷变形破坏的地质因素，提出采用顶部卸压法进行硐室维护的方案，并模拟卸压前后围岩应力及变形的变化。数值模拟结果表明顶部卸压后，硐室围岩应力重新分布，围岩应力下降和向深部转移；硐室顶底板围岩铅垂应力及两帮水平应力均减小，顶板围岩铅垂应力平均减少61.5％，底板浅部0-2 m区间内围岩铅垂应力接近0，水平应力平均减小75.4％。从模拟结果看，顶部卸压实施后有利于机头硐室的长期稳定。
심부대과도동실재고응력하상출현명현적위암변형파배，엄중적회영향광정적정상생산심지인발사고。이신장매광궤두동실수위압파배변형위공정배경，분석궤두동실항변형파배적지질인소，제출채용정부사압법진행동실유호적방안，병모의사압전후위암응력급변형적변화。수치모의결과표명정부사압후，동실위암응력중신분포，위암응력하강화향심부전이；동실정저판위암연수응력급량방수평응력균감소，정판위암연수응력평균감소61.5％，저판천부0-2 m구간내위암연수응력접근0，수평응력평균감소75.4％。종모의결과간，정부사압실시후유리우궤두동실적장기은정。
The obvious displacement and deformation occurs often in deep chamber under high stress , which maybe affect the normal production , and what ’ s worse , cause safety accident when displacement and deformation are se-vere in coal mine .In this paper , on the background of displacement and deformation in head chamber of Xinzhuang Coal Mine , the geologic factors that effect the displacement and deformation of head chamber were analyzed , the design precept by applying top pressure relief of large-span chamber was put forward , and the stresses on the sur-rounding rocks and deformation of chamber were simulated before and after the pressure relief .Numerical simula-tion results showed that the stresses on the surrounding rocks were redistributed , which decreased and transferred to the deep rock;both horizontal stresses and vertical stresses were declined on roof and floor of chamber , the vertical stress of the roof rock was reduced by 61.5%and the stress was close to zero on the surface in 0-2 m depth of the floor , the horizontal stress of surrounding rock in two sides were reduced by 75.4%.The results of numerical simu-lation show that it is useful for long-term stability of the chamber .