Risk assessment and prevention of rock burst based on seismic wave CT detection
In order to solve the uncertainty of the impact danger area existing in the mining process of the working face and the fuzziness of the static load distribution inside the coal and rock mass,this paper adopts the seismic wave CT detection technology,carries out impact risk assessment on the mining face,re-determines the impact danger area,and makes a targe-ted pressure relief plan.The prevention and control effect of rock burst during mining is improved.The results show that dur-ing the mining period of Xiaozhuang Mine 40302 face,there are 9 moderate danger areas,14 weak danger areas,and other areas are no impact danger areas.The fracturing technology of L-shaped horizontal well on the surface,large diameter pres-sure relief drilling of coal seam,coal seam blasting and roof pre-cracking blasting are used to relieve pressure in the impact danger area,which effectively reduces the impact risk during the mining of the working face and provides a guarantee for the safe mining of the working face.
rock burstseismic wave CTstatic load detectionsectional fracturingpressure relief drillingpre-cracking blasting
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