中国煤炭
中國煤炭
중국매탄
CHINA COAL
2015年
4期
72-76
,共5页
衡多%王鹏翔%马文强%江姣姣
衡多%王鵬翔%馬文彊%江姣姣
형다%왕붕상%마문강%강교교
大倾角煤层%开采工作面%沿空掘巷%煤柱宽度%数值模拟
大傾角煤層%開採工作麵%沿空掘巷%煤柱寬度%數值模擬
대경각매층%개채공작면%연공굴항%매주관도%수치모의
deeply inclined coal seam%mining face%gob-side entry driving%coal pillar width%numerical simulation
为确定大倾角煤层沿空掘巷预留小煤柱合理宽度,通过理论计算对护巷煤柱宽度进行了分析；运用UDEC模拟软件对不同煤柱宽度下巷道的变形量和煤柱应力进行了数值模拟。结果表明：理论计算的煤柱合理宽度应为5m；综合数值模拟中煤层顶板支承压力分布、巷道变形量和煤柱应力集中情况选取煤柱宽度为5 m,与理论计算相符；将所得结果应用于21071工作面回风巷的掘进,即留设5 m煤柱沿空掘进巷道,回采期巷道变形量能满足矿井正常生产需求,无需返修。
為確定大傾角煤層沿空掘巷預留小煤柱閤理寬度,通過理論計算對護巷煤柱寬度進行瞭分析；運用UDEC模擬軟件對不同煤柱寬度下巷道的變形量和煤柱應力進行瞭數值模擬。結果錶明：理論計算的煤柱閤理寬度應為5m；綜閤數值模擬中煤層頂闆支承壓力分佈、巷道變形量和煤柱應力集中情況選取煤柱寬度為5 m,與理論計算相符；將所得結果應用于21071工作麵迴風巷的掘進,即留設5 m煤柱沿空掘進巷道,迴採期巷道變形量能滿足礦井正常生產需求,無需返脩。
위학정대경각매층연공굴항예류소매주합리관도,통과이론계산대호항매주관도진행료분석；운용UDEC모의연건대불동매주관도하항도적변형량화매주응력진행료수치모의。결과표명：이론계산적매주합리관도응위5m；종합수치모의중매층정판지승압력분포、항도변형량화매주응력집중정황선취매주관도위5 m,여이론계산상부；장소득결과응용우21071공작면회풍항적굴진,즉류설5 m매주연공굴진항도,회채기항도변형량능만족광정정상생산수구,무수반수。
To ascertain the reasonable width of coal pillar of gob-side entry driving in deeply inclined coal seam,theoretical calculation was applied to analyze the width of the protection coal pillar;the deformation of roadway and the stress on coal pillar under the conditions of different pillar width were simulated by UDEC and the results showed that the reasonable width of coal pillar through theoretical calculating was supposed to be 5 meters. According to the support pres-sure distribution,deformation of roadway and the condition of coal pillar stress concentration in comprehensive numerical simulation,the pillar width was 5 meters,which conformed to the the-oretical calculation. Applying the results to the return airway of 21071 working face,the deform-ation of roadway could meet the requirement of the regular production of the mine without repair during the mining period.
