某矿山地下开采对地表河流安全性影响的研究

Research on the influence of underground mining of a mine on the safety of the rivers on the surface

以某地下开采矿山为研究对象,在对其进行地质条件和开采技术条件综合分析的基础上,选取典型勘探线剖面作为研究对象,采用有限差分软件Flac 3D建立数值计算模型,研究不同开采方案地下开采对地表河流安全性的影响,并将其应用于现场,对其合理性进行验证。研究结果表明:-100~-400 m矿体可采用分段空场嗣后充填采矿法进行安全开采,-40~-100 m的矿体应采用分层充填采矿法或留保安矿柱的方法对其进行开采;目前地表河流稳定性较好,后期应加强对地表河流安全性的监测。该研究结果可为类似矿山进行安全和高效开采提供理论依据,对保护地表河流的安全具有重要的意义。

In a case study of one underground mine,based on the comprehensive analysis of the geological conditions and mining conditions,the typical exploration line section is taken as the research subject.A numerical model is established according to the finite difference software Flac 3D,and the influence of underground mining with different schemes on the safety of the rivers on the surface is studied.The results are applied on-site and verified.The research results show that the ore bodies buried between-100 m and-400 m can be extracted by sublevel open stope and subsequent mining methods for safe mining,and the ore bodies between-40 m and-100 m can be extracted by the cut-and-fill method or security pillar reservation mining method.At present,the stability of rivers on the surface is good.Later on,the monitoring of the safety of the rivers on the surface should be enhanced.The research results can provide a theoretical basis for the safe and efficient mining of similar mines,also it is of significance in protecting the safety of the rivers on the surface.