金川矿区原岩应力场与软弱层带构造的关系

Relationship between In-Situ Rock Stress Field and Weak Intercalation in Jinchuan Mine

受青藏高原持续隆起的影响,处于一对区域性共轭断层之间的龙首山断块强烈抬升。F_1深大断层为共轭断层中的2断层之一,整个矿区就位于F_1西南面的影响区域之中。龙首山断块中纵横分布着2个断层系统,因受其影响,矿区岩体中发育出2组优势节理面。对一个断层活动性较强的区域,其中的断层和岩体节理面相对于地应力场而言,应该接近临界滑移状态。根据实测的金川矿区地应力资料和实测的岩体节理面间的摩擦系数,计算给出岩体节理面间的摩擦力水平确实约等于最大静摩擦力,力学计算与地学观点取得一致,可见在金川矿区,软弱层带构造对地应力的积累程度和分布状态起着决定作用。

The continual uplift of the Qinghai-Tibet Plateau results in the strong uplift of the fault block of Lonshou Mountain between a pair of regional conjugated faults.In the fault block,there are two fault systems in longitudinal and hor- izontal distribution,under the effect of which,two groups of superior joint planes are developed in the rockmass.For a zone with strong fault activity,its faults and the joint planes of the rockmass,to the ground stress field,should approach the crit- ical sliding state.The ca...