【摘 要】
：
The control distance of backfilling mining of superhigh-water material is an important parameter to control the roof and surface subsidence.The plastic limited equilibrium method was used in this pape
【机 构】
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Hunan Provincial Key Laboratory of Clean Coal Resources Utilization and Mine Environmental Protectio
【出 处】
：
2012国际矿山测量学术论坛(proceedings of the joint international worksh
论文部分内容阅读
The control distance of backfilling mining of superhigh-water material is an important parameter to control the roof and surface subsidence.The plastic limited equilibrium method was used in this paper to analyze different boundary support of two-way plate,which obtained the limited span and the location of plastic hinge line of each boundary condition.It also pointed out the limited falling distance can be expressed by i m l ?K ?wi,where m K is plastic span criterion,which represents the beam stability of the main roof and the shape coefficient i w,represents the effect oflength ratio and boundary conditions.At last,combining with the characteristic of superhigh-water backfilling,the criterion of backfilling distance was deduced and the application conditions of open-up and bag filling were analyzed.
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