兰山采场挂帮矿开采对运输平硐的安全影响分析

Analysis of Safety Impact of Hanging Wall Mining on Transportation Adit in Lanshan Stope

兰山采场1 080 m水平以上挂帮矿工业矿石(Fe_(1+2+3))资源量7 323万t,为最大限度回收矿石资源,延长矿山服务年限,该部位挂帮矿可采用露天转地下开采方式进行回收利用。主要结合兰山采场挂帮矿矿体赋存形态、开采方式及中段运输平硐布置情况,利用Midas GTS NX软件建立数值模拟模型,并结合FLAC^(3D)计算分析挂帮矿开采对围岩及中段运输平硐的安全影响。分析结果表明,挂帮矿开采将影响中段运输平硐的稳定性并使其出现破坏。模拟结果对兰山采场露天转地下开采回收挂帮矿资源过程中矿山的安全生产具有一定的指导意义,下一步在生产实际中应加强中段运输平硐的支护及安全管理。

The resources of the ore mining industry ore(Fe1+2+3) above the 1 080 m level in the Lanshan stope are 73.23 million tons. In order to maximize the recovery of ore resources and extend the service life of the mine, the site can be used for open pits. Mining methods are recycled. Mainly combined with the occurrence form, mining mode and the layout of the middle section of the Lanshan mining site, the Midas GTS NX software is used to establish the numerical simulation model and combined with the FLAC3 D calculation to analyze the surrounding rock and the middle section of the mining. The analysis results show that the hanging mining will affect the stability of the middle section of the transportation and cause damage. The simulation results have certain guiding significance for the safe production of the mine during the process of converting the underground mining to the underground mining and recycling resources. The next step is to strengthen the support and safety management of the middle transportation flat in the actual production.