金川二矿区深部工程地质研究与岩体质量评价

RESEARCH ON DEEP ENGINEERING GEOLOGY AND EVALUATION ON ROCK QUALITY IN NO.2 DIGGINGS OF JINCHUAN

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。由于矿体埋藏深而地压大,矿区地应力高,岩体节理裂隙发育,围岩稳定性极差。随开采延深、采场面积扩大,采场地压控制和巷道稳定性维护是二期开采中的关键技术问题,为了探索最佳采场地压控制措施和巷道支护技术,进行二期采场系统分析与参数优化,工程地质研究与岩体质量评价是深部开采的基础。为此,金川矿区对此进行了深入研究。首先,开展了深部工程围岩的现场调查、分析与研究,在此基础上,进行工程围岩分类和质量评价。

No.1 deposit body is the main deposit body of Jinchuan mine. It is also the body of the second exploitation period in the second mining zone. Because of deep embedding,great geopressure,high in-situ stress,many joints in rock and poor stability of wall rock,the geopressure control and maintenance of laneway stability become a key technological issue during the exploitation. In selecting the best control measure of stope and the timbering technology of laneway,the system analysis and parameter optimization,geological engineering research and rock quality evaluation are the basis of underground work. Thorough research and an on-the-spot investigation are carried out in Jinchuan deposit. On this basis,the engineering wall rocks are classified and the quality of the rocks are evaluated.