Analysis of Surrounding Rock Control Technology and Its Application on a Dynamic Pressure Roadway in a Thick Coal Seam

The deformation control of roadways surrounded by rock in the fully mechanized amplification sections extra-thick coal seams is problematic. To analyze failure and characteristics a support frame, as well processes surrounding rock, through theoretical analysis industrial tests, conditions return airway caving face an seam Yangchangwan Coal Mine, Ningdong mining, area were examined. Combined with limit equilibrium theory roadway section size, width pillar air at 130,205 working was calculated to be 6 m. layout scheme implementation parameters roof blasting pressure relief, grouting modification, bolt (cable) designed. Based on analysis, “Coal optimization–roof cutting destressing–routing modification–rock bolting” system for synergy enlarged mining proposed, monitored, along stress body effect site. Field experiments show that after roadway, maximum subsidence top plate 55 mm, bottom heave values upper lower side drums 30 mm 70 respectively, breaking rate reduced more than 90% 70%, respectively. effective performance observed well. practice method indicated effectively controlled, successful application this technology able provide reliable technical mines similar conditions.