Abstract:

By the multiple faults affect Chen four floor coal mine 21501 working face ending work during the construction period, working surface structure affected lots obvious pressure appearance, broken roof, the ending work has been seriously affected. Considering comprehensivly about the surface mine pressure regularity, hydrogeololgy, blasting parameters , support parameter ,back line , and other factors, Many techniques have been adopted such as broken zone of bottom grouting strengthening, Strengthen the management of broken roof, select blasting parameters reasonably, strengthen the state management support operation, Increase channel support strength、optimize back line other control measures to administrate the ending work of fully mechanized mining face under complex structure. Good results were gained after the innovation . this study provides valuable experiences for fully mechanized mining face under the complex geological conditions.

Key words: ending work, roof fracture, complicate structure, bottom grouting, blasting, supporting parameters