LIU S W, MI C, HE D Y,et al.Surrounding rock control technology and its application based on synergistic roof cutting and support in advanced mining roadways of thick coal seams under three-soft conditions[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(2):76-85.

doi:10.16186/j.cnki.1673-9787.2024060008

Received:2025/06/05

Revised:2025/09/23

Published:2026/01/28

Surrounding rock control technology and its application based on synergistic roof cutting and support in advanced mining roadways of thick coal seams under three-soft conditions

Liu Shaowei1,2, Mi Chao1, He Deyin1, Li Xiaopeng1

1.School of Energy Science and Engineering， Henan Polytechnic University， Jiaozuo  454003， Henan， China；2.State Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization， Jiaozuo  454003， Henan， China

Abstract: Objectives To address the problems of severe surrounding rock stress concentration， complicated advance support procedures with poor effectiveness， and slow working-face advancement in advanced mining roadways of thick coal seams under three-soft conditions， a study on synergistic surrounding rock control technology integrating roof cutting and support was conducted.  Methods Taking the belt transportation roadway of the 12203 working face in Zhaojiazhai Coal Mine as the engineering background， numerical simulations combined with field industrial tests were employed to analyze the factors influencing surrounding rock stress concentration in the advanced roadway section. The optimal roof-cutting scheme and advanced anchor-cable reinforcement support scheme were investigated. Results The results indicate that the superposition of the advanced and lateral abutment pressures of the working face with the lateral abutment pressure induced by roadway excavation has a significant influence on surrounding rock stress concentration in the advanced support zone. Numerical simulations demonstrate that roof cutting can effectively alleviate stress concentration by transferring surrounding rock stress， modifying the load distribution of the mining area， and relieving pressure. The optimal roof-cutting parameters were determined as a cutting angle of 10° and a cutting depth of 18 m， and the corresponding advanced anchor-cable reinforcement support scheme was established. Field application of the synergistic “roof cutting-support” technology in the belt transportation roadway of the 12203 working face shows that stress concentration in the shallow surrounding rock of the advanced zone was effectively mitigated， advance passive support was eliminated， and safe roadway operation was ensured. Conclusions The synergistic surrounding rock control technology integrating roof cutting and support can effectively relieve stress and reinforce support， ensuring the safety and stability of advanced mining roadways while enabling safe and efficient working-face advance. This technology provides a valuable technical reference for surrounding rock control in similar thick coal seam mining roadways under three-soft conditions.

Key words: roof cutting and pressure relief; stress transfer; advance support; surrounding rock control; thick coal seams under three-soft conditions