Research on Intelligent Coupling Control Technology Between Caving Hydraulic Support and Surrounding Rock

Based on the interaction between hydraulic support and surrounding rock, this paper considers that the coupling relationship between hydraulic support and surrounding rock mainly includes three parts: The strength coupling, stiffness coupling and stability coupling between the support and the surrounding rock, wherein the strength of the surrounding rock determines the load formed by the fracture and instability of the overlying strata on the working face, while the support strength and structural strength of the hydraulic support can adapt to and change the size and position of the surrounding rock load. On this basis, the instability mechanism of hydraulic support topple in fully mechanized caving face of inclined coal seam is analyzed, and the simplified model of hydraulic support ultimate topple is established. This paper analyzes the mechanism of hydraulic support dumping in the process of moving the hydraulic support in the fully mechanized caving face of inclined coal seam and establishes the critical model of hydraulic support dumping in the fully mechanized caving face of inclined coal seam. Taking No. 4101 working face of Hemei No.3 Mine and No. 2125 working face of Hemei No.6 Mine as engineering background, the hydraulic support falling control technology of fully mechanized caving face of inclined coal seam is put forward. In order to realize the intelligent coupling between hydraulic support and surrounding rock and realize intelligent attitude adjustment, inclination sensor and pressure sensor are arranged in the corresponding position of hydraulic support. By calculating and comparing the measured data, the automatic adjustment of hydraulic support attitude is realized, and then the intelligent coupling with surrounding rock top coal is realized.