Designing an underground lead and zink mine using in-situ initial state of stresses
Designing an underground lead and zink mine using in-situ initial state of stresses
复制标题
使用原位初始应力状态设计地下铅锌矿
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
M. Stefenelli
中科院分区：
文献类型：
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作者：
T. Walter;G. Khatibi;M. Nelhiebel;M. Stefenelli
在地下工程开孔设计中，最重要的参数之一是初始应力状态，在此基础上确定开孔的几何尺寸和所需支架的体积。为了评估地表以下平均深度120米处的地应力，利用钻孔Slotter进行了一系列试验。利用Kirsch和Hooke定律，在相同的巷道和钻孔中进行了膨胀试验，以找到计算应力所需的模量。结果表明：最大主应力为水平方向，约为5.2MPa，中间主应力为垂直方向；这些结果已成功地用于控制几何尺寸、开口方向和超前周期的设计。
One of the most important parameters in designing the openings in underground works is the initial state of stresses, based on which the geometrical dimensions of the openings and the volume of required supports are determined. A number of tests have been conducted to evaluate in-situ stresses at the mean depth of 120 meters below the surface by means of Borehole Slotter. Dilatometer tests in the same galleries and boreholes were performed in order to find the required modulus for calculating the stresses, using Kirsch and Hooke Laws. The results show that the maximum principal stress is horizontal with the magnitude of about 5.2MPa while the intermediate one was in vertical direction. These results have been successfully used for controlling the design of geometrical dimensions, orientation of openings and advance periods.