岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2013年
10期
2847-2856
,共10页
李为腾%李术才%王琦%阮国强%左金忠%刘文江%王德超%王洪涛
李為騰%李術纔%王琦%阮國彊%左金忠%劉文江%王德超%王洪濤
리위등%리술재%왕기%원국강%좌금충%류문강%왕덕초%왕홍도
厚顶煤巷道%让压型锚索箱梁%模型试验%变形破坏%机制%关键部位
厚頂煤巷道%讓壓型錨索箱樑%模型試驗%變形破壞%機製%關鍵部位
후정매항도%양압형묘색상량%모형시험%변형파배%궤제%관건부위
roadway with thick top coal%pressure relief anchor cable box beam%model test%deformation and failure%mechanism%key position
为研究深部厚顶煤巷道围岩变形破坏特性及其机制，以赵楼煤矿千米深井厚顶煤巷道为工程背景，开展了大比尺地质力学模型试验，对让压型锚索箱梁支护系统作用下的巷道围岩位移、应力演化规律进行的研究表明：巷道顶底板围岩竖向应力释放较两帮剧烈，水平应力释放反之，巷道顶板中部围岩是顶板竖向应力释放的主要部位。通过与现场试验结果对比验证，总结出深部厚顶煤巷道围岩变形破坏的3个主要特征：顶板变形破坏较两帮和底板严重、顶板围岩变形破坏主要发生在煤岩交界面以下的煤体中、巷中是顶板变形破坏的关键部位，并进一步分析了相应机制：顶板煤岩松软破碎、自承能力差、顶板及其巷中竖向应力释放相对更为剧烈、矩形巷道顶板受力状态差等因素，导致顶煤所受径向应力低，碎胀变形剧烈，且弯曲变形、离层严重，顶板受力结构恶化，最终导致顶板控制困难。
為研究深部厚頂煤巷道圍巖變形破壞特性及其機製，以趙樓煤礦韆米深井厚頂煤巷道為工程揹景，開展瞭大比呎地質力學模型試驗，對讓壓型錨索箱樑支護繫統作用下的巷道圍巖位移、應力縯化規律進行的研究錶明：巷道頂底闆圍巖豎嚮應力釋放較兩幫劇烈，水平應力釋放反之，巷道頂闆中部圍巖是頂闆豎嚮應力釋放的主要部位。通過與現場試驗結果對比驗證，總結齣深部厚頂煤巷道圍巖變形破壞的3箇主要特徵：頂闆變形破壞較兩幫和底闆嚴重、頂闆圍巖變形破壞主要髮生在煤巖交界麵以下的煤體中、巷中是頂闆變形破壞的關鍵部位，併進一步分析瞭相應機製：頂闆煤巖鬆軟破碎、自承能力差、頂闆及其巷中豎嚮應力釋放相對更為劇烈、矩形巷道頂闆受力狀態差等因素，導緻頂煤所受徑嚮應力低，碎脹變形劇烈，且彎麯變形、離層嚴重，頂闆受力結構噁化，最終導緻頂闆控製睏難。
위연구심부후정매항도위암변형파배특성급기궤제，이조루매광천미심정후정매항도위공정배경，개전료대비척지질역학모형시험，대양압형묘색상량지호계통작용하적항도위암위이、응력연화규률진행적연구표명：항도정저판위암수향응력석방교량방극렬，수평응력석방반지，항도정판중부위암시정판수향응력석방적주요부위。통과여현장시험결과대비험증，총결출심부후정매항도위암변형파배적3개주요특정：정판변형파배교량방화저판엄중、정판위암변형파배주요발생재매암교계면이하적매체중、항중시정판변형파배적관건부위，병진일보분석료상응궤제：정판매암송연파쇄、자승능력차、정판급기항중수향응력석방상대경위극렬、구형항도정판수력상태차등인소，도치정매소수경향응력저，쇄창변형극렬，차만곡변형、리층엄중，정판수력결구악화，최종도치정판공제곤난。
In order to research the surrounding rock deformation and failure mechanism of deep thick top coal roadway, taking Zhaolou coal mine in Juye mining area as engineering background, a large scale model test is carried out, the stress and displacement evolution laws of surrounding rock supported by pressure relief anchor cable box beam supporting programs are researched. And the results show:the vertical stress release is more intense in roof and floor of the roadway than that in the side wall, while the horizontal stress is the opposite;central of roadway roof is the main position of vertical stress release. By being compared with field test results, three main deformation and failure characters of the surrounding rock of deep thick top coal roadway are summarized: the deformation and failure of roof is more serious than that of side wall and floor; deformation and failure of roadway roof occurrs mainly in the coal below coal-rock interface; central of roadway roof is the key position of the deformation and failure. The corresponding mechanism is analyzed: the factors such as soft and broken features of roof coal, its poor self-supporting ability, vertical stress releasing more severe in roof and its central, poor force state of rectangle roadway, cause low radial stress of surrounding rock in roof, serve bulking deformation, bending deformation and roof separation, and worsen the roof force structure, finally, they lead to controlling trouble of roadway roof.
