Validation study of no?pillar mining method without advance tunneling: A case study of a mine in China

Studies regarding the reuse of a gob-side roadway formed by N00 longwall mining method are scarce. To investigate mine pressure behavior characteristics during reuse, anchor cable force, roof-to-floor deformation, and working resistance hydraulic support obtained from verification face were analyzed. Test results show that influence range mining-induced was 0-90 m in front face. The ratios first periodic weighting steps between entry-retaining non-roof-cutting sides 20.25 1.94, respectively. However, ground strengths at two 1.07 1.31, indicate monitored can be classified into three deformation zones based on severity behavior: large, intermediate, creep. main roof adjacent faces exhibited failure type comprising “O-X” “O-Y” states, which resulted an unconventional behavior. This study provides insights as well important guidance for tackling similar geological conditions when using this method.