Experimental research on energy enhancement effect of annular hole radial blasting
In view of the strong mining influence in the development and extension of close-range sym-biotic minerals,it is necessary to overcome the technical problems of low-damage,shock-absorbing and high-efficiency blasting excavation in the development of shaft and roadway,so as to shorten the influ-ence time of coordinated mining dynamic pressure on sinking and driving engineering.At present,annu-lar blasting is a new high-efficiency and low-carbon blasting method.In view of the lack of quantitative research on annular hole radial blasting stress field,energy field,this paper mainly explored energy en-hancement effect of annular hole radial blasting through the blasting test.The superdynamic strain test system was used to test and analyze the stress field of the single layer charge explosion in the concrete test model.Compared with the equivalent single hole,the rock breaking characteristics of the annular hole with greater stress,stronger energy and longer time in the middle and far region of blasting were obtained quantitatively.The research results revealed quantitatively the enhancement effect of radial blas-ting energy of annular hole single-layer charge,and verified the technical characteristics and environ-mental protection advantages of annular hole with high efficiency and low energy consumption.It provid-ed theoretical basis and technical support for optimizing design of blasting parameters of annular hole charge.
万方数据
维普
