金川深部高应力采场工程地质研究与岩体质量评价

金川矿区1#矿体是金川矿区主要矿体,也是二矿区二期开采的矿体。由于矿体埋藏深、地压大,矿区地应力高,岩体节理裂隙发育,围岩稳定性极差。随着开采延深、采场面积扩大,采场地压活动剧烈。因此,采场地压控制和巷道稳定性维护是二期深部开采中的关键技术难题。它不仅直接关系到二期工程的安全生产,而且还决定了深部采矿的生产成本。因此,探索最佳采场地压控制措施和巷道支护技术和采场系统分析与参数优化,是二矿区深部采矿的重要研究课题,而工程地质研究与岩体质量评价是这一研究的基础。本文在进行了深部工程围岩的现场调查、分析与研究的基础上,进行了工程围岩分类和质量评价,给出了可以用于深部地压控制和系统分析的地质基础。

RESEARCH OF ENGINEERING GEOLOGY AND QUALITY EVALUATION OF ROCK MASSES FOR DEEP STOPE WITH HIGH STRESS IN JINCHUAN MINE

1# ore body is a main one in Jinchuan mine and is also mining ore body of the second period mining for Mine No,2 Jinchuan mine. Because the embedding depth of the ore is larger, joints is more development and geological structural stress is higher the stability of surrounding rock masses of the deep stop is lower. As increase of the depth of mining depth and extending of mining area the activity of underground pressure of the stope is intensive, then the problems of stability of roadways and stope is more serious. So it is necessary for us to explore a reasonable measures and optimizing design parameters. The research of engineering geology is the above study. This paper gives the results of the conditions of the surrounding rock masses and quality evaluation based on investigation in site, analysis and researches. The results had been used into controlling underground pressure and support design of the roadways.