金川二矿区地应力测量及研究新进展

MEASUREMENT AND RESEARCH ON IN-SITU STRESS IN JINCHUAN NO.2 ORE DISTRICT

金川镍矿是我国著名的有色金属矿山,工程地质条件复杂,矿山开采难度大。近年来由于矿山开发的深入,开采强度、深度、广度的增加,导致了各类工程地质问题恶化。地应力的测量与研究是进行工程地质问题研究的基础,本文总结了主力矿区二矿区地应力研究的历史,根据最新的实地测量数据,对于二矿区的地应力进行了系统研究与分析,总结了最新的矿区地应力分布规律,更新了应力与深度的计算公式,通过分析,1 000m水平为垂直应力逐渐占据主导地位的过渡带,主应力与最大水平应力增加的幅度变缓,带内的应力状况将变得十分复杂,同一深度,不同工程区域可能会出现不同的应力状态,并且随着最大主应力与最小主应力差值的增加,其剪应力将逐渐加大,这对于地下工程施工和采矿都是十分不利的。

Jinchuan nickel mine is one of China-famous multi-metal with complicated geological condition and high difficulty mining level. In order to make a guideline for mining production and construction, in-situ stress in this mining campus should be investigated. In recent years, all kinds of engineering geological problems worsened, which are occurred by mining development and increasing of mining intensity, depth and breadth. While the in-situ stress measurement and research can be considered as the bases of engineering geology. This essay will review the history of crustal stress research in the second mine block in Jinchuan mine, and will systematically examine the crustal stress in the second mine block in Jinchuan mine based on its new field of measurement data. In addition, the new regular pattern of the in-situ stress distribution will be summarized for this mining campus, and therefore to guide mining production and construction activities.