THE ROCKBURST MECHANISM AND PREVENTING TECHNOLOGY OF UNDERGROUND PROJECTS AT HIGH GROUND STRESSES
With the constant development of economic construction, the exploitation and utilization of the underground spaces are developed into the deep strata, and the geological conditions become more and more complicated. The deep underground projects, located at the special geological environment of high ground stress and brittle rock mass, are apt to rockburst. It is proved that the rockburst is a geological disaster which happens in hard brittle rock mass with lots of energy accumulated. Based on the analysis of stress state of the underground engineering, the possibility of occurrence of rockburst can be estimated by combination with the criterion of tangential stress. For forecasting the occurrence of rockburst accurately, the factors of elastic strain energy and rock brittleness should be considered, and the corresponding criteria are summarized. With the consideration of the accumulative and eruptible characteristics of strain energy and stress distribution in rockmass, the rockburst types and their intensity classification is summarized. Four engineering measures are put forward for preventing and curing the rockburst. The four measures involves stress relieves by blasting, enhances of physical-mechanical properties of rock, improve of the stress conditions of surrounding rock and the reinforcement of rockmass.
XIAO-CONG LV JIN-YU XU JUN-ZHONG LIU
The Engineering college, Air Force Engineering University Xian, Shaanxi, 710038, 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
763-768
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）