Research of Surrounding Rock Control of Gob-Side Entry Retaining Based on Deviatoric Stress Distribution Characteristics

In view of the difficulty surrounding rock control retaining a roadway along goaf, this paper takes 5504 working face Hongshuliang Coal Mine as engineering context. The uniaxial compressive strength and tensile concrete filling material in retained are determined by laboratory tests. Through theoretical analysis, field investigation, numerical simulation measurement, distribution characteristics deviatoric stress damage zone mining process studied here. Based on failure mass element caused tensors, study shows that thickness wall is 2.2 m can reach 10.87~11.64 MPa 3 days to 4 days, which meet support roadway. From position 90 front 100 behind face, form is: symmetrical butterfly shape → single narrow oblique strip 8 wide shape. When distance between 49 m, tends be stable. outline line rock, divided into three regions, combined technology “bolt + anchor cable pillar reinforcement with steel plate strengthen wall” proposed. practice, maximum displacement roof, floor, solid coal side 136.6 mm, 78.8 62.3 mm 43.3 respectively, effect good.