The application of grouting reinforcement to the broken surrounding rock of 1366 stoping roadway

This study proposes a fractional grouting reinforcement scheme of the roadway with full section to tackle surrounding rock breakage in the stoping roadway of 1366 working face and roadway deformation, floor heave and support failure.The infiltration grouting process is adopted to determine reasonable grouting pressure and grout diffusion radius for full section reinforcement.The stress, plastic zone distribution and surface displacement of surrounding rock before and after grouting are forecast through numerical simulation.Field application and monitoring show that: after the full section fractional grouting scheme is used to reinforce the mining roadway, the roadway deformation is considerably reduced, the roadway force is balanced, and the stress concentration is alleviated, which is basically consistent with the numerical simulation results.The grouting reinforcement scheme works to strengthen the surrounding rock of 1366 mining roadway, maintain the stability of surrounding rock of roadway, and provided references for the control of surrounding rock of roadway under similar conditions.