Research on the Technology of Weakening Hard Coal Mass Strength through Hydraulic Fracture
Technologic problems and possible inducing disaster in fully mechanized top coal carving for hard thick coal seam were analyzed in this paper. The technical principle of hydraulic fracture weakening for hard coal-rock mass and its multifunction effect including strength weakening, reducing dust, pre-releasing gas and preventing coal spontaneous combustion were analyzed. It was presented that hydraulic fracture weakening strength for hard coal-rock mass is an effective technology insuring safe and high efficient mining under hard thick and high gas coal seam. Current research of the technology was analyzed. It was put forward that crack expanding law of hydraulic fracture in coal-rock mass, structure alteration of fissured rock mass by seepage pressure and its macromechanics response and envelop bore technology of fissured rock mass hydraulic fracture weakening are the key technique and direction to further research.
hard top-coal (roof) hydraulic fracture crack expanding mescoscopic structure
Huang Bingxiang Liu Changyou Cheng Qingying
The State Key Laboratory of Coal Resource and Safe Mining, China University of Mining and Technology, Xuzhou 221008, Jiangsu, China
国际会议
The 2007 International Symposium on Safety Science and Technology(2007采矿科学与安全技术国际学术会议)
河南焦作
英文
104-110
2007-04-17（万方平台首次上网日期，不代表论文的发表时间）