煤矿现代化
煤礦現代化
매광현대화
COAL MINE MODERNIZATION
2012年
4期
50-52,49
,共4页
混凝土块砌墙%沿空留巷%围岩稳定性%数值模拟
混凝土塊砌牆%沿空留巷%圍巖穩定性%數值模擬
혼응토괴체장%연공류항%위암은정성%수치모의
The concrete blocks wall-buih,%Gob-side entry retained,%the stability of surrounding rock,%Numerical simulation
采空区顶板岩层分层垮落、岩层的旋转下沉和平移下沉造成巷道围岩次生应力场重新分布,围岩变形严重,因此,掌握沿空留巷采动支承压力影响下顶板岩层运动规律非常必要。针对某矿浅埋煤层、宽巷掘进、预掘留巷位置混凝土砌块沿空留巷的实际情况,通过三维数值模型对留巷围岩应力场、位移场、破坏场进行反演,揭示了留巷围岩矿压活动规律,对巷旁支护墙体受力变形特点、与顶板运动协调变形关系进行了分析,得出工作面轨顺留巷前后巷道围岩变形规律,为沿空保留巷道围岩控制提供了理论依据和技术支持。
採空區頂闆巖層分層垮落、巖層的鏇轉下沉和平移下沉造成巷道圍巖次生應力場重新分佈,圍巖變形嚴重,因此,掌握沿空留巷採動支承壓力影響下頂闆巖層運動規律非常必要。針對某礦淺埋煤層、寬巷掘進、預掘留巷位置混凝土砌塊沿空留巷的實際情況,通過三維數值模型對留巷圍巖應力場、位移場、破壞場進行反縯,揭示瞭留巷圍巖礦壓活動規律,對巷徬支護牆體受力變形特點、與頂闆運動協調變形關繫進行瞭分析,得齣工作麵軌順留巷前後巷道圍巖變形規律,為沿空保留巷道圍巖控製提供瞭理論依據和技術支持。
채공구정판암층분층과락、암층적선전하침화평이하침조성항도위암차생응력장중신분포,위암변형엄중,인차,장악연공류항채동지승압력영향하정판암층운동규률비상필요。침대모광천매매층、관항굴진、예굴류항위치혼응토체괴연공류항적실제정황,통과삼유수치모형대류항위암응력장、위이장、파배장진행반연,게시료류항위암광압활동규률,대항방지호장체수력변형특점、여정판운동협조변형관계진행료분석,득출공작면궤순류항전후항도위암변형규률,위연공보류항도위암공제제공료이론의거화기술지지。
Layered roof strata pieces fell, The rotation sinking and panning sinking of the roof strata the lead to distributing afresh of sur- rounding rock stress, surrounding rock deformation is serious, therefore, mastering roof movement rules caused by abutment pressure influence of gob-side entry retained is very necessary. According to actual situation of the shallow seam, due getting wide tunneling, gob-side entry re- tained of concrete blocks, through to three dimensional numerical model to studying surrounding rock stress field, displacement field and dis- ruption field inversion of retained roadway, reveals mine pressure mobile rule of the surrounding rock of retained roadway, stress and deforma- tion characteristics of Lane supporting beside, and roof movement coordinated deformation relationship is analysed, it provides theoretical ba- sis and technical support surrounding rock control of gob-side entry retained.
