红旗铁矿老露天坑和渗流场对井下开采稳定性的影响

以池州市贵池区红旗铁矿为例,通过现场调查、取样、试验确定岩体质量等级,结合有关方法进行强度折减用于稳定性计算,并结合矿山的实际情况进行现状渗流场分析,在此基础上通过有限单元法计算矿区井下开采现状稳定性,矿区露天采坑对井下稳定性的影响,最后对矿山存在的安全隐患提出了对应的防治措施。

Effect on Stability of Underground Mining of Old Open-pit and Seepage Field of Hongqi Iron Mine

Taking the Hongqi Iron Mine in Guichi district in Guizhou province as a case,the rock mass quality classifica-tion is determined by adopting the filed investigation,sampling and testing method,the strength reduction is done by using the relevant methods to conduct the stability calculation,combined with the actual situation of the iron mine,the mine status seep-age filed analysis is done,based on the above analysis results,the mining area status stability is calculated by adopting the fi-nite element method,besides that,the influence of the open mining pit to underground mining area are conducted stability anal-ysis and evaluation. According to the established analysis calculation model,the stability of the later mining of the iron mine is analyzed and predicted,the corresponding control measured of the mining security risks of the iron mine are proposed.