Application of hole spacing design of presplitting blasting in prevention and control of rockburst
Strong strata behavior appeared in Yinhua Mining 30209 working face during mining period.In order to solve the problem,the roof deep hole pre-splitting is introduced to carry out pressure relief.We analyze the range of fracture zone with 96 kg explosive blasting,simulate the hole spacing of 8 m,10 m and 15 m,respectively,by numerical simulation means,and study the development range of plastic zone under different hole spacing.The new parameter design scheme is tested in the field,and the statistical results of microseismic monitoring data are obtained.The comparison of the pressure relief effect at different hole spacing proves that the designed parameter scheme has better pressure relief effect.
rock burstpre-splitting blastinghole spacingparameter designmicroseismic monitoring
国家科技期刊平台
NSTL
万方数据
维普
