Abstract:
Aiming at the difficulty in controlling the surrounding rock and the high degree of deformation and damage of the dynamic pressure roadway in the extra thick coal seam of Buliangou Coal Mine, a strong support-pressure relief-grouting technology for the dynamic pressure roadway in the thick coal seam was proposed through practice.By improving the strength and stiffness of anchor rod(cable)support, the bearing capacity of the surrounding rock was enhanced; Transfer stress peaks in the roadway and coal pillar through hydraulic fracturing to relieve pressure; By grouting and modifying the coal pillar, the integrity was restored, the strength was improved, the internal movement was restricted, and the squeezing effect on the roof was reduced; Three technological means work together to boost control effects.After the application of the technology, compared with single anchor(cable)support, the deformation of the surrounding rock in the roadway was significantly reduced, and maintenance was not required during the excavation-mining period, achieving the effective control of the surrounding rock throughout the entire service cycle of the roadway.