金川矿区原岩应力场与软弱层带构造的关系

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。F₁深大断层为共轭断层中的2断层之一，整个矿区就位于F₁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。

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

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 horizontal 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 critical sliding state.The calculation of the friction force between the joint planes, which is made according to the practically measured stress data and the friction coefficient between the joint planes of the rockmass, does equal the maximum static friction force.Thus the mechanical calculation result conforms to the geoscienctific viewpoint and it can be seen that the weak intercalations in Jinchuan Mine have decisive effect on the accumulation degree and distribution state of the ground stress.