Floor Heave Mechanism and Control of South Waiting Chamber in Auxiliary Shaft of Zhujixi Coal Mine

For controlling the floor heave in deep soft rock roadway, the paper analyzes the serious floor heave mechanism of the waiting chamber in Zhujixi Coal Mine, the physical and water management mechanical properties of soft rock and the roadway floor supporting strength are the main factors of floor heave. So, the design adopts shallow grouting the first step, and then adopts bolt-grouting reinforcement. The deformation of mine became slow after 60 days monitoring, and the pressure of floor became stable. So, the results indicate that this process could control the occurrence of floor heave in soft rock surrounding roadway.