Seismic effort of blasting wave transmitted in coal-rock mass associated with mining operation

被引:22
作者
Cao An-ye
Dou Lin-ming [1 ]
Luo Xun [2 ]
Zheng Yi-dong [1 ]
Huang Jun-li [3 ]
Andrew, K. [2 ]
机构
[1] China Univ Min & Technol, State Key Lab Coal Resource & Mine Safety, Sch Mines, Xuzhou 221116, Peoples R China
[2] CSIRO, Explorat & Min, Brisbane, Qld 4069, Australia
[3] China Univ Min & Technol, Fac Safety Engn, Xuzhou 221116, Peoples R China
关键词
seismic effort; blasting wave; transmission and attenuation rule; fracture zone; intensity weakening; geophone station;
D O I
10.1007/s11771-012-1317-6
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Microseismic effects during the transmission of seismic waves in coal and rock mass associated with mining operation were studied by on-site blasting tests and microseismic monitoring in LW704 of Southern Colliery, Australia, by using spread velocities, amplitudes and frequency contents as the main analysis parameters. The results show that the average P-wave velocity, mean values of combined maximal amplitudes and frequencies of the first arrivals are all reduced significantly along with goaf expanding and intensity weakening of overlying strata during mining process. A full roof fracturing can make the average P-wave velocities, combined maximal amplitudes and frequencies of first arrivals reduce to about 69.8%, 92.2% and 60.0%, respectively. The reduction of the above seismic parameters reveals dynamic effects of the variation of strata structure and property to the wave transmission and energy dissipation of blasting wave. The research greatly benefits further study on stability of surrounding rock under the destructive effort by mine tremor, blasting, etc, and provides experimental basis for source relocation and parameter optimization of seismic monitoring as well.
引用
收藏
页码:2604 / 2610
页数:7
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