Control Technology of Surrounding Rock Deformation by Tunneling Gateway Along Gob With Small Coal Pillars in Geological Structural Belt

Through analyzing technical control difficulties in 7602 return airway; the surrounding rock deformation characteristics are studied. It is identified that the coal pillar width of 7 m is reasonable, and the pre-stressed full-length anchoring system is proposed to control surrounding rock deformation, the control scheme is designed. The application results show that the control scheme can control the deformation effectively, which reduces roadway two-side displacement by 40 percent and ensures the mining face normally.