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地应力场是煤层渗透性优势发育方位重要影响因素,准确获取地应力场主应力方向信息可以为煤矿瓦斯抽采工程设计与煤层气井网布置提供理论指导。系统总结了巷道变形破坏特征与地应力场类型、井下应力痕迹特征与地应力场最大水平主应力方向之间关系,提出了利用围岩变形破坏特征预测煤矿区地应力场主应力方向的方法。在焦作古汉山矿进行了现场应用,预测矿井地应力场为σH>σv>σh型、地应力场最大主应力方向应为NE向,预测结果与地应力实测结果基本吻合,证明了该方法有效性。
The geostress field is an important influencing factor for the favorable developmental orientation of coalbed permeability. Accurately obtaining the principal stress direction information of the geostress field can provide theoretical guidance for the design of coalmine gas drainage engineering and the layout of the coalbed methane well. The relationship between the deformation and destruction characteristics of roadway and the types of ground stress field, the characteristics of underground stress traces and the maximum horizontal principal stress direction of the ground stress field are summarized, and a method of using the deformation and failure characteristics of surrounding rock to predict the principal stress direction of the in-situ stress field is proposed. The field application of the Guhanshan Mine in Jiaozuo has been carried out. It is predicted that the stress field of the mine is σH> σv> σh, the direction of the maximum principal stress of the ground stress field should be NE, and the prediction results are in good agreement with the measured results of ground stress. Effectiveness.