Abstract:

Abstract: Under thick mudstone roof circumstance,large span and high rib heading stability of enclosing rock was more inferior,and support was more difficult. Based on analyzing geological conditions of enclosing rock, in accordance with relevant design criterion，reasonable support parameter was determined，then construction methods and technology was designed. The in-situ experiment result showed that enclosing rock of reloading heading appeared less deformation, the support was effective.

Key words: Key words: Large span, High rib, Thick mudstone, Support parameter, Corbel