The Research Of Mining Technology In Dayin’ Gezhuang Gold About Slowly Inclined And Broken Deposit

In recent years, gold prices rising gold prices, but also continuously breaking record, thegold enterprises constantly reduce milling grade of ore body, at the same time have a higherdemand about the recovery of orebody under this opportunity. Dayin’gezhuang gold wants toimprove the mining method in order to increase the amount of mine and to improve theefficiency of the economy, at the same time for mining reasonable gold resources.Dayin’gezhuang gold has a broken plate, and small area allowed exposure of the ore bodyroof. The ore body are slower, average inclination angle about30°,The surface does not allowcollapse around, so Dayin’gezhuang gold must use filling method mining. The height of themiddle, the change of orebody boundary and shape are big, the average level of the thickness ofthe thick orebody is20m, metal grade is lower, and the average grade is3g/t or so.Because of the thickness, grade and the broke genesis, at present Dayin’gezhuang gold arein difficult situation. In the past, Dayin’gezhuang gold use to the layered filling mining method.In mining process, because the broken stope roof, a lots of ore are lossed. Loss rate of oreachieve50%above. Because there are often landslides happened, workers under the big risk,these bring a lot of work personnel security problems. The mine mining method of the currenthas a low production capacity, high cost of mining relatively. With the increase of mining depth,the changes of ore body shape is more complex, ore body is more broken, orebody dip anglechange to slow, supporting cost and mining, transportation, ascension, ventilated are increasing.Mining cost increased corresponding. So choose a kind of mining method which is economy,efficiency and safety is the main issue of this paper.According to the present situation of the Dayin’gezhuang gold, comprehensive variousfactors about consideration of the ore body bearing conditions, the equipments, worker’s safety,production efficiency, economic benefit and so on, this paper puts forward three feasibilityschemes, and makes analysis comprehensive the three mining schemes, select the best one that isscheme-staged segmentation extrusion caved ore mining method with filling continuous.