淮南矿区地应力场作用特征研究
he Characteristic of In-situ Stress Field in Huainan Ming Area
利用空芯包体地应力测量方法对淮南矿区的地应力进行了实测。通过对淮南矿区实测地应力数据的分析，获得了矿区的地应力场分布特征。研究表明，淮南矿区地应力场具有如下作用特征：(1) 总体上来看，所有测点的两个主应力近水平，一个主应力近垂直。垂直主应力与上覆岩体的重力具有良好的相关性；水平主应力随深度的增加而增加，不同区域增加的梯度不同；(2) 最大水平主应力与最小水平主应力的比值与测点深度没有明显的关系，50%以上的测点水平主应力差异显著；(3) 最大水平主应力作用方位为北东向，局部区域受构造等影响，水平主应力发生变化。总体上，淮南矿区受北东向的挤压应力作用。根据三个主应力量值的关系，确定淮南矿区地应力场类型属于大地动力场型和准静水应力场类型。以不同岩石的泊松比差异引起的地应力量值的相对变化阐明了应力场类型的转换是由于主应力量值的相对变化引起的，处于临界状态的应力场极易受到岩性变化的影响而发生类型的转换。分析认为地应力场的以上特征对于淮南矿区煤与瓦斯突出的发生具有重要作用，提出了在进行瓦斯抽放钻孔参数设计时应考虑地应力场特征的建议。
Using the hollow included technique to measure the in-situ stress of Huainan mining area. According the analysis of the measurement data, the characteristic of in-situ stress field is obtained. The result shows that: (1) two principal stresses are nearly horizontal and one is nearly vertical among three principal stresses on all sites. The magnitude of vertical stress is equal to the weight of overburden rock mass. The horizontal principal stress is increased with the depth. (2) The ratio of major principal stress to minor principal stress is not increased with depth evidently. The ratio of major principal stress to minor principal stress is more than 1.4 on 50% sites. (3) The orientation of major principal stress is NE. it has some deflection in local. According the relation of three principal stresses, considered that the type of Huainan mining area is dynamic stress field and quasi static stress field. The transition of in-site stress field’s type is induced of the relative change of principal stress’s magnitude. It is easily to transit because of difference of rock mass’s Poisson\\\\\\\
韩军、张宏伟
矿山地质、矿山测量矿山压力、矿山支护
地应力场临界状态转换岩性突出瓦斯抽放
in-situ stress fieldcritical statetransitionlithologyoutburstgas drainage
韩军,张宏伟.淮南矿区地应力场作用特征研究[EB/OL].(2007-11-01)[2025-08-03].http://www.paper.edu.cn/releasepaper/content/200711-26.点此复制
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