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宽巷掘进沿空留巷矿压规律数值模拟研究 被引量:1
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作者 林东才 魏夕合 《煤矿现代化》 2012年第4期50-52,49,共4页
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... 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。 展开更多
关键词 混凝土块砌墙 沿空留巷 围岩稳定性 数值模拟
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Experimental Study on Improving Seismic Behavior of Load-Bearing Masonry Wall Made of Autoclaved Aerated Concrete 被引量:1
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作者 于敬海 曹建锋 费添慧 《Transactions of Tianjin University》 EI CAS 2013年第6期419-424,共6页
To investigate the seismic behavior of autoclaved aerated concrete load-bearing masonry wall(AACLMW), a piece of control block wall without constructional measures and five pieces of block walls with different constru... To investigate the seismic behavior of autoclaved aerated concrete load-bearing masonry wall(AACLMW), a piece of control block wall without constructional measures and five pieces of block walls with different constructional measures were tested under low reversed cyclic loading which imitated low to moderate earthquake force. The seismic behavior of AACLMW with different constructional measures in terms of failure mode, hysteretic curve, deformation capacity and displacement ductility was studied and compared with that without constructional measures. The experimental results indicate that the constructional measures comprising constructional columns and horizontal concrete strips are effective for improving the seismic behavior of AACLMW. The study in this paper can provide a reliable experimental basis for further analysis and engineering application of AACLMW in the future. 展开更多
关键词 autoclaved aerated concrete(AAC) load-bearing masonry wall(LMW) seismic behavior constructional column concrete strip
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