Mechanism and Control of Floor Heave in Soft Rock Roadways under Tectonic Stress

To solve the serious floor heave in return-air alley of No.2 seam in Xindingtai Mining Co., the paper analyzed influential factors of the floor heave and determined it as squeeze-fluidity heave. Tectonic stress, surrounding rock properties, and unreasonable support plan are the main factors of the floor heaves. Therefore, we proposed the combined support with anchor-cable-mesh and double U29 steel ring. The results showed the successful...