Field Test of Blasting Cutting Mode of Small Section Geological Carving
[Purposes]In order to research on the influence of different cutting methods on the blasting ex-cavation.[Methods]The blasting effects of two different cutting schemes in the actual blasting excava-tion of geological caving are statistically analyzed under the premise of same layout of the auxiliary hole and the peripheral hole.The drilling workload,blasting penetration and blasting block degree are respec-tively compared.[Findings]The statistical results show that in the hard rock stratum,the 14-hole cut-ting scheme drilled 4 holes more than the 10-hole cutting scheme,accounting for 4.4%of the whole working cycle time,and the average penetration was 14.9%higher than the latter,but the former was more stable and more uniform.[Conclusions]Comparing the blasting effect of two different cutting meth-ods,this paper can provide reference for the cutting arrangement of small section blasting under the con-dition of hard surrounding rock.
caving and excavationsmall section excavationcutting modeexcavation footage
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