ABSTRACT
The geological conditions of deep-buried roadway are complex and the horizontal stress is large, resulting in severe deformation, difficult support, and frequent repair of the working face along the trench. Therefore, it is of great significance to carry out in-situ stress measurements in deep mining areas and analyze the distribution characteristics of the in-situ stress field for roadway optimization design and maintenance. Taking the 2407 working face of Yuhua Coal Mine as an example, the core stress relief method is used to measure the three-dimensional in-situ stress of the south wing roadway, obtain the parameters such as the magnitude and direction of the in-situ stress in the horizontal section, and provide in-situ stress parameters for the support design. The support optimization scheme is put forward, and the field industrial test is carried out to verify the rationality of the support scheme. The results show that the main stress direction of the Yuhua Coal Mine is east-west, and the tectonic movement has a great influence on the in-situ stress, which belongs to the control area of tectonic movement; the included angle between the maximum principal stress direction and the axial direction of 2407 working face is large, which has a significant impact on roadway excavation; the field industrial test shows that the application effect of the support optimization scheme is good, the deformation of roadway surrounding rock is effectively controlled, and the safe production of the working face is ensured.
