关键词: 深井, 大断面硐室, 联合支护, 理论分析, 监测

Abstract: In order to keep the stability of large-section chamber in the Deep Mine，and based on totally grasping the physical and mechanical properties and the engineering geological conditions of the surrounding rock of the central distribution chamber in the southeast orebody of a copper mine in Africa，the area around the chamber is divided into four regions，including the fractured region，the cracked zone， the elastic zone and the plastic zone according to elastic-plastic theory. Combined with the theoretical formula and the engineering analogy method，the combined support scheme of "anchor bolt + anchor cable + steel mesh +sprayed concrete" was proposed，and the supporting parameters were determined by the empirical formula method and monitored on-site. Engineering practice showed that the surface displacement and deep displacement of chamber are less，which means that the deformation of surrounding rock has been effectively controlled. This method has good supporting effect and can provide references for similar chamber engineering.

Key words: Deep well, Large section chamber, Combined support, The theoretical analysis, Monitoring