关键词: 深部巷道, 倾斜煤层, 沿空掘巷, 控制技术

Abstract: The paper has analyzed the stress field and displacement field of surrounding rock of gob-side entry driving in deep inclined coal seam at driving stage and mining stage, and revealed the asymmetric large deformation characteristics of such roadway. The deformation amount of narrow coal pillar rib and floor was greater than that of solid coal mass rib and roof, and the convergence rate of whole roadway section is large. Reasons contributing to such deformation and failure characteristics have been pointed out as below：1) As the roadway is buried in great depth, the surrounding rock is located in high stress environment; 2) The width of roadway protection is not enough and the supporting resistance is too small, which make the surrounding rock enter the residual bearing stage too early; 3) Unsupported floor as the main releasing channel for deformation and failure energy, has intensified the whole subsidence of roof surrounding rock. The paper has reasonably determined the width of roadway protecting coal pillar and the supporting technology and parameters of testing roadway. Engineering practice has showed that after adopting new supporting technology, the asymmetric large deformation of narrow coal pillar and floor has been controlled effectively, which has maintained the long term stability of the testing roadway.

Key words: deep roadway, inclined coal seam, gob-side entry driving, control technology