INVESTIGATION OF THE COAL BUMP LIABILITY THROUGH MICROSCOPIC EXPERIMENTS
The investigation on the mechanism of coal bumps is always one of the hot topics in the field of mining and rock mechanics all over the world. Coal mine bumps are sudden failures near mine entries which may expel large amounts of coal and rock into the face area and cause damages to underground openings and to equipments. Persistent bump problems not only threaten the safety of mine workers, but also have caused the abandonment of large coal reserves. Researchers have made a large effort to understand, anticipate, and control this kind of hazard and achieved lots of helpful results. This paper describes a series of microscopic experiments finished to analyze the relationship between bump-prone property and microstructureal characteristics of coal. The micro-process of unstable cracking in coal and the development process of coal bumps induced by propagation of fractures were analyzed systematically. Moreover, a bump liability indices based on the microstructure parameters of coal was proposed to determine the bump potential of coal.
YAO-DONG JIANG YI-XIN ZHAO JIE ZHU
State Key Lab of Coal Resources and Safe Mining, School of Mechanics, Architecture and Civil Engineering, China University of Mining and Technology, Beijing, 100083, P.R.China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
223-228
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）