Abstract:The deformation and destruction of roadway surrounding rock is one of the main factors restricting the safe and efficient production of coal. Effective roadway surrounding rock deformation detection means and supporting technology are important guarantees for the normal mining of underground coal resources. In order to ensure the safe and efficient production of coal resources, it is particularly important to study the deformation and control technology of roadway surrounding rock. Combined with in-situ monitoring, theoretical analysis, data processing and numerical simulation, the lithology analysis of roadway surrounding rock was carried out, and the internal causes of roadway deformation were deduced. Then the roof separation instrument and borehole stress sensor were used for multi-source monitoring of roadway surrounding rock, and the monitoring data were analyzed remotely. According to the analysis results of data monitoring, a scientific and reasonable roadway surrounding rock control scheme is designed, and the control effect is tested by FLAC3D numerical simulation method. The borehole stress gauge data show that the surrounding rock stress increases first and then decreases along the side wall away from the roadway. The data of roof separation instrument show that the mining influence does not cause serious roof separation phenomenon in the area of roadway stress increase. The numerical simulation results show that the surrounding rock control scheme can reduce the original deformation of roadway by 50%, so as to effectively control the deformation of surrounding rock. The study on monitoring and control of roadway surrounding rock deformation provides a theoretical basis for roadway surrounding rock deformation control.
