Research On Blasting Technology Of Goaf Overlying Rock In Wu Jiata Open Mine

Due to the open mining by small coal mines alley interference, there exists explosive consumption high,degree of rock lumpiness uneven,blasting parameters not reasonable, blasting hazard level high, explosive shock hazard in the alley personnel problems in blasting operation. seriouly influence open mine production efficiency and economic benefits. Therefore, it is necessary to goaf overlying rock blasting for further research.Aiming at the WuJiata open mine goaf overlying rock of the actual conditions, the analysis of the WuJiata in the goaf of the geological conditions and characteristics of goaf size based on, using the site survey, theory analysis and calculation, method of combining the numerical simulation, to WuJiata open mine goaf overlying rock blasting technology problems and empty lane in explosion wave to human body and equipment safety distance on further research. According to the goaf blasting theory, puts forward a suitable goaf overburden step hole blasting process and parameters, determine the blasting shock wave produced to empty lane personnel in equipment safe distance. For both WuJiata open mine goaf safety blasting provides scientific basis, but also for other open mine appear similar situation provides a reference value.