The study on mining technical scheme of No.4#EE orebody in 530m level Tongkuangyu Mine
Under the influence of ore-body shape,occurrence condition and rock mass cavability,the underground mining of metal deposit must be scientifically and rigorously demonstrated,and the mining scheme should give consideration to high safety,strong feasibility and good economic benefit.The main mining method of Tongkuangyu Mine is block caving mining method,in order to fully recover mineral resources,4#EE ore body in the middle section of 530m level outside the mining scope of the main ore body,according to the occurrence conditions of the ore body,the combined mining technical scheme of"upper'pre-extraction'+lower block caving mining method+caving method with bottom pillar on the side"is selected after full demonstration and comparison.This scheme takes into account the advantages of different caving mining processes,reduces the adverse factors such as complex ore body shape,relatively small scale and poor rock mass cavability,greatly improves technical reliability,significantly improves recovery rate and economic benefits,and realizes safe,economic and efficient mining.The successful application of this joint mining technical scheme has a strong reference significance for the underground mining of metal ore bodies with similar characteristics,and the technical measures mentioned in the paper such as"pre-extraction,pre-cracking blasting,waste rock separation"to expand the scope of application of block caving mining method are worthy of promotion and reference.
underground mining of metal depositblock caving pre-extractioncaving method with bottom pillarjoint mining technical scheme
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