Evaluation of technical and economic indicators of mine blasting
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(1) Explosive unit consumption refers to the weight of explosives consumed by blasting 1m3 or 1t rock ore, in units of kg/cm2 or kg/t.
(2) The amount of unexploded or not, refers to the average volume or weight of rock (or ore) that can be collapsed by the 1m blasthole, in m3/3 or t/m.
(3) The utilization of the blasthole is generally used for blasting in the roadway, which refers to the ratio of the footage of the primary blasting cycle to the average depth of the blasthole, in units of %.
(4) Large-scale and root-bottom ratios refer to the ratio of unqualified large blocks and roots generated in the total blasting rock ore after one blasting in the mine, in units of %.
(5) Blasting cost refers to the cost of materials, labor, equipment and management related to blasting operations consumed by blasting 1n (or 1t) rock mines. Many mines often use piercing costs including perforation operations.
In addition to the index, but also widely stack bulk mining of coals and the geometry of the overall cost of coal used to evaluate the effect of blasting. With the development of systems engineering science and computer application in the mining industry, blasting optimization problems are being studied at home and abroad. The blasting with the lowest comprehensive mining cost including perforation, blasting, loading, transportation and crushing is called optimal blasting. .