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矸石充填沿空护巷技术的试验与应用 总被引:1,自引:0,他引:1
介绍了双沟煤矿北-巷道矸石充填沿空护巷技术的试验成果及推广应用注意事项。 相似文献
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Coal mining under buildings certainly causes surface movement and deformation, therefore, it brings about deformation even fracture for buildings. It is an important task to evaluate correctly the buildings‘ damage grade caused by coal mining. Fuzzy comprehensive evaluation, considering some factors of buildings‘ fracture, has been applied to analyze the masonry structure buildings‘ damage grade after coal mining in this paper. It provides a scientific basis for buildings‘ reinforcement before mining and maintenance or compensation after mining. 相似文献
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选取兖州、淮北、新汶等矿区的多组矿井水水样进行悬浮物的ζ电位测试,并对矿井水净化处理中常用的聚合氯化铝和聚合硫酸铁两种混凝剂的混凝效果进行了对比试验.结果表明:矿井水中悬浮物属于半胶态体系,带负电荷,其ζ电位介于-20~~30mV.聚合硫酸铁的电中和能力较强,其混凝效果优于以吸附架桥和网捕为主的聚合氯化铝. 相似文献
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Introduction Groundsubsidenceduetoundergroundcoalminingmaycausedamagetosurfacestructuresandfarmlandandchangesurfaceandsurfacedrainagepatters.Duringthepastfewdecades ,anumberofsubsidencepredictiontechniqueshavebeenproposed .Currently ,theinfluencefunctionmethodisthemostwidelyusedforpredictionoflong wallcoalminingsubsidence .Butthesemethodscanbeonlyusedtocalculatethegroundsubsidence .Theycannotbeusedtoanalyzestressofminingimpactstratum .Finiteelementmethodmaybeusedtocalculatethestressanddisp… 相似文献
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