Optimization of blasting parameters for rock roadway excavation in Sangshuping Coal Mine
In order to effectively protect the drilling unit,improve the efficiency of slag removal,and reasonably increase the circulating footage,on the basis of thorough investigation of existing blasting techniques,a blasting test plan based on"hol-low hole straight hole cutting"was proposed.Through explosion-forming hollow hole double seven hole cutting blasting test,and direct cut blasting test in the lower stage double cut area,the optimal blasting parameters for rock roadway excavation in Sangshuping Coal Mine were determined by experiments such as the three-step initiation blasting test in the lower stage sin-gle cut area and the optimization of the three-step initiation method,to realize the goal of blasting flying stones being less than 15 m and increasing the monthly excavation footage by 20～30 m.The scheme has effectively solve the issues of low ef-ficiency of rock roadway tunneling and the long-throwing distance of blasting flying rocks,thus providing reference for appli-cation of the fast tunneling comprehensive technology in mine rock roadway.
万方数据
维普
