Study on Safe and Efficient Mining Technology of Three-step Panel Pillar in Gently Inclined Thick and Large Orebody
Panel pillar mining of gently inclined thick ore body is of great significance to maintain mine productivity.Taking Dongguashan copper deposit as the industrial application stope,through optimiz-ing the mining method,using the existing engineering to arrange the mining roadway,optimizing the blast-ing parameters,the technical scheme of safe and efficient mining of ore pillars in the panel of gently in-clined thick and large ore bodies is formulated.The engineering practice shows that the stope blasting fully meets the design requirements,the roof and two sides of the chamber are not obviously broken,and the in-tact rate of blasting holes reaches more than 90%.The ore recovery rate of the ore pillar in the panel area is more than 75%,and the economic benefit is remarkable.The research results provide a reference for similar mines.
gently inclined thick and large orebodypanel pillarmining roadwayblasting parame-ters
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