Study On Water Depth Effect On Rock Blasting Explosive

When the hydrostatic pressure remains constant, Using10gTNT equivalent underwater explosion vessel which was developed by WUST and CRPCEC to simulatedifferent water environmental by changing the water pressure at the surface of the rock.Studing the impact of depth on the quantity of rock explosive. Exploring therelationship between water depth, the dose and rock crushing degrees.Keep the consumption unchanged, the plus pressure was0MPa、0.5MPa、1MPa、1.5MPa、2MPa, respectively, a plurality of underwater explosion experiments oflarge and small block have done. Through rock chunks distribution, we found chunksrate increases with water depth. And got the relationship of depth and chunks.Under conditions of0.5MPa and1MPa Plus pressure, we have donemultigroup experimental study of underwater explosion with0.679kg/m3、0.514kg/m3、0.348kg/m3、0.182kg/m3consumption, respectively. Through the fragmentsStatistics of specimen mass We obtained the optimal consumption under the0.5MPa pressure was0.514kg/m3distribution, and the optimal consumption under1MPa pressure was0.679kg/m3.Keep the Depth unchanged, uniformity index n increases, both of fractalDimension D and crushing increases and the probability f increases with an increasein consumption charge,the relative proportion of chunks of content part in reduced rockfragmentation increases, and fit the fractal dimension D and explosives consumptionrelationship,formula, in line with similar rates of underwater explosion, fractaldimension prediction formula and the derivation of the actual underwater blastingconsumption calculation have some reference significance.