地下矿山岩体质量分级三维可视化应用研究

Study on Three-dimensional Visualization Application of Rock Mass Quality Classification in Underground Mines

以某矿山勘探钻孔获得的岩体RQD值为基础,应用Surpac软件的三维建模可视化技术,通过三维块段估值计算,构建了矿区岩体质量分级分区三维模型。统计分析岩体质量的空间分布状态。结果表明,矿体Ⅰ级岩体占比29.4%、Ⅱ级岩体占比41.2%、Ⅲ级岩体占比24.4%、Ⅳ级和Ⅴ级岩体仅占5%,在-260 m中段以上以Ⅱ、Ⅲ级为主,在-260 m中段以下以Ⅰ、Ⅱ级岩体为主。根据岩体质量分级结果,建议该矿区岩体质量Ⅲ级及以下的矿体回采采用进路充填采矿法,Ⅰ、Ⅱ级岩体采用分段充填或阶段空场嗣后充填采矿法,井下溜井或硐室布置根据岩体质量的空间分布避开Ⅲ级以下的岩体,深部矿体回采的采场结构参数可以适当加大,宽度为15~18 m,长度为45~75 m,阶段高度为60 m。岩体质量分级分区三维模型可为矿山的生产建设提供重要的指导。

Based on the RQD value of rock mass obtained by exploration drilling in a mine,the three-dimensional modeling visualization technology of Surpac software was applied,a three-dimensional model of rock mass quality classification in mining area was constructed through evaluation and calculation of three-dimensional block.The spatial distribution of rock mass quality was statistically analyzed.The results show that the rock mass accounts for 29.4%of grade 1,41.2% of grade Ⅱ,24.4%of grade Ⅱ,and only 5%of grade Ⅳ and Ⅴ rock mass.Above the-260 m middle section,the rock mass is mainly grade Ⅰ and grade II,below the-260 m middle section,the rock mass is mainly grade Ⅰ and grade Ⅱ.According to the results of rock mass quality classification,it is suggested that the drift filling mining method should be adopted for the mining of ore bodies with rock mass quality below grade Ⅱ,and the sublevel flling or stage open stoping with subsequent filling mining method should be adopted for rock mass of grade Ⅰ to grade Ⅰ.The arrangement of underground chute or chamber should avoid the rock mass below grade Ⅱ according to the spatial distribution of rock mass quality.The stope structure parameters of deep ore body mining can be appropriately increased,with a width of 15-18 m,a length of 45-75 m and a stage height of 60 m.The three-dimensional model of rock mass quality classification can provide important guidance for the production and construction ofmines.