同煤科技
同煤科技
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SCIENCE AND TECHNOLOGY OF DATONG COAL MINING ADMINISTRATION
2015年
1期
8-11
,共4页
煤矿开采%巷道支护%高应力软岩巷道%矿压显现%壁后充填%FLAC 3D数值模拟
煤礦開採%巷道支護%高應力軟巖巷道%礦壓顯現%壁後充填%FLAC 3D數值模擬
매광개채%항도지호%고응력연암항도%광압현현%벽후충전%FLAC 3D수치모의
coal mining%roadway support%high stress and soft rock of roadway%mine pressure behavior%backwall infilling%FLAC 3D numerical simulation
随着林南仓矿开采深度的增大，巷道所处应力水平不断增大，巷道矿压显现剧烈，围岩变形严重，尤其是高应力条件下的泥质软岩巷道支护变得越来越困难。通过对林南仓矿高应力下深部软岩巷道破坏机理，巷道围岩矿物成分和主要围岩物理力学性质的分析，提出了采用拱顶锚杆前期临时后期永久支护、金属拱形支架、壁后混凝土充填、墙体补强锚索和注浆锚杆耦合协调支护，对巷道变形进行有效控制。通过FLAC 3D数值模拟，确定了林南仓矿深部高应力软岩巷道围岩的变形破坏特征，并验证支护设计的可行性和优化支护参数。通过巷道变形监测，表明新型支护体系有效地控制了深部软岩巷道围岩的大变形和底臌，维持了巷道的长期稳定，取得了良好的技术经济效果。
隨著林南倉礦開採深度的增大，巷道所處應力水平不斷增大，巷道礦壓顯現劇烈，圍巖變形嚴重，尤其是高應力條件下的泥質軟巖巷道支護變得越來越睏難。通過對林南倉礦高應力下深部軟巖巷道破壞機理，巷道圍巖礦物成分和主要圍巖物理力學性質的分析，提齣瞭採用拱頂錨桿前期臨時後期永久支護、金屬拱形支架、壁後混凝土充填、牆體補彊錨索和註漿錨桿耦閤協調支護，對巷道變形進行有效控製。通過FLAC 3D數值模擬，確定瞭林南倉礦深部高應力軟巖巷道圍巖的變形破壞特徵，併驗證支護設計的可行性和優化支護參數。通過巷道變形鑑測，錶明新型支護體繫有效地控製瞭深部軟巖巷道圍巖的大變形和底臌，維持瞭巷道的長期穩定，取得瞭良好的技術經濟效果。
수착림남창광개채심도적증대，항도소처응력수평불단증대，항도광압현현극렬，위암변형엄중，우기시고응력조건하적니질연암항도지호변득월래월곤난。통과대림남창광고응력하심부연암항도파배궤리，항도위암광물성분화주요위암물리역학성질적분석，제출료채용공정묘간전기림시후기영구지호、금속공형지가、벽후혼응토충전、장체보강묘색화주장묘간우합협조지호，대항도변형진행유효공제。통과FLAC 3D수치모의，학정료림남창광심부고응력연암항도위암적변형파배특정，병험증지호설계적가행성화우화지호삼수。통과항도변형감측，표명신형지호체계유효지공제료심부연암항도위암적대변형화저고，유지료항도적장기은정，취득료량호적기술경제효과。
With the increasing of the mining depth and roadway stress level in Linnancang Coal Mine, roadway mine pressure appear drastically, surrounding rock deformation is serious, especially the pelitic soft rock of the roadways support is becoming more and more difficult under the condition of high stress. By analyzing on the fracture mechanism of the deep soft rock roadways under high stress, the mineral composition of surrounding rock and the main physical and mechanical properties of surrounding rock for Linnancang Coal Mine, the roadway deformation under effective control by using early temporary and later permanent vault anchor support, metal arch support, backwall concrete infilling, wall supplement anchor cable and coupling coordination support with grouted anchor is put forward. By the FLAC 3D numerical simulation, deformation and failure characteristics of surrounding rock in deep high stress soft rock roadway are determined, and the feasibility of supporting design is verified and the supporting parameters are optimized.Through the roadway deformation monitoring, it shows that the new supporting system can effectively control the large deformation and the rise of working surface of surrounding rock in deep soft rock roadway, the long-term stability of the roadway is maintained,and good technical and economic effect is achieved.
