DOI: 10.11799/ce201805017
Research on super-deep hole pre-splitting blasting technology in steep working face with hard roof
ZHANG Jun-hui
LIU Hong-lin
GUAN Wei-ming
Abstract：To improve a series of safety questions caused by large areas of hanging arch on steep working face, based on the engineering background of 26221 face in 2130 Coal Mine in Xinjiang Province, the accidents are analyzed, such as abnormal pressure increase of mining face roof and roadway surrounding rocks, frequent occurrence of roof falling and rib spalling accidents, hydraulic support slipping and falling on working face. The idea and principal of hard roof control in steep working face is mainly analyzed, main program and parameters of super-deep hole advance presplitting blasting is determined. In field construction, maximum length of the hole in transportation tunnel was 95m, strata pressure action law and roof caving effect showed the program was safe and reliable.
Keywords：steeply inclinedhard roofpre-splitting blasting of super-deep holeslarge areas of hanging roofroof control
Publication Date：2018-01-01
Pages：4( 60-63 )