阳城煤矿地应力测量及分布特征研究
Research on Geostress Measurement and Distribution Characteristics in Yangcheng Coal Mine
何建新 1孔令猛 1李强1
作者信息
- 1. 山东济矿鲁能煤电股份有限公司阳城分公司,山东 济宁 272610
- 折叠
摘要
为指导阳城煤矿井巷工程合理设计及安全开采,采用应力解除法对矿区进行了三维地应力测量,对数据进行分析计算.结果表明:阳城煤矿六采区地应力场整体以水平应力为主,属于水平应力场类型,此类型地应力场主要对巷道顶底板的稳定性产生影响.经测量,六采区 1 号、2 号监测点处最大主应力值分别为 17.2 MPa、16.9 MPa,最大水平主应力的大小约为最小水平主应力的 1.21～1.22 倍,应力场特征基本呈现为σH＞σh＞σV.地应力测量表明,采区水平以水平应力较大,但最大主应力与中间主应力、最小主应力虽有一定差别,但相差不大,监测点的最大水平主应力σH方位角处于 150°区域,主应力方向与巷道轴向存在42°～44°的夹角,水平应力对巷道、硐室的稳定性会存在一定影响.
Abstract
In order to guide the rational design and safe mining of the mining area well roadway engineering of Yangcheng Coal Mine,the stress relief method is adopted to measure the three-dimensional geostress of the mining area,and the data is conducted to be analyzed and calculated.The results show that the overall stress field in the sixth mining area of Yangcheng Coal Mine is mainly horizontal stress,belonging to the type of horizontal stress field.This type of stress field mainly affects the stability of the roadway roof and floor.According to measurements,the maximum principal stress values at No.1 and No.2 monitoring points in the sixth mining area are 17.2 MPa and 16.9 MPa,respectively.The magnitude of the maximum horizontal principal stress is approximately 1.21-1.22 times than that of the minimum horizontal principal stress,and the stress field characteristics generally show as σH>σh>σV.The measurement of geostress shows that the horizontal stress in the mining area level is relatively large,but although there is a certain difference between the maximum principal stress and the intermediate principal stress,as well as the minimum principal stress,the difference is not significant.The azimuth angle of the maximum horizontal principal stress σH at the monitoring point is in the 150° region,and the direction of the principal stress is at an angle of 42°-44° with the axial direction of the roadway.The horizontal stress will have a certain impact on the stability of the roadway and chamber.
关键词
三维地应力/现场实测/地质构造/巷道布置Key words
three-dimensional geostress/on-site actual measurement/geological structure/roadway layout引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据