Inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method

Abstract

The invention discloses an inclination fragmentation ore body segment top board reconstruction middle-deep hole ore break down filling mining method. According to the method, an intermediate section on an ore body direction is divided into several backstopping units; an intermediate section transport tunnel is arranged at the bottom of the intermediate section, a segment transport gallery is arranged in the segment; the segment transport gallery is connected to the intermediate section transport tunnel through a winze, the segment transport gallery is communicated to a stope; a slip-casting cavern chamber along the ore body direction is excavated at the contact position of each segment top ore body and the surrounding rocks; the fragmented surrounding rocks can be performed with slip-casting and reinforcing in the slip-casting cavern chamber to construct an artificial top board; the ore break down by blasting is carried out on a rock drilling platform under the artificial top board, the blasted ore is sent to a well, and is transported through the intermediate section transport gallery; lower layer segment backstopping is finished and then filling is carried out, and the artificial top board of the layer is taken as a base plate of an upper layer segment for backstopping work of the upper layer segment. The mining method is adapted to exploitation of fragmented inclination ore body, and has the characteristics of high production efficiency, strong security of the backstopping work, excellent index of ore dilution and good economic benefit.

Description

technical field [0001] The invention relates to a mining method, in particular to a mining method for obliquely broken ore body segmented roof reconstruction and deep hole falling ore filling, which is suitable for mining oblique ore bodies in underground metal mines. Background technique [0002] For the mining of inclined orebodies where the surrounding rocks on the hanging wall or the surrounding rocks on the upper and lower walls are very broken, under the condition that the ground collapse is not allowed, the filling method represented by the downward layered filling method is mainly used at present. However, due to the limitation of layer height, this kind of mining method has complicated mining process, high cost of mining and filling, and poor filling and top connection. Therefore, the mine has problems of low mining efficiency and great safety hazards. At the same time, in order to maintain the stability of the upper and lower walls of the ore body and the roof of t...

AI Technical Summary

Problems solved by technology

However, due to the limitation of layer height, this kind of mining method has complex mining process, high cost of mining and filling, and poor filling and top connection. Therefore, there are problems of low mining efficiency and large safety hazards in mines.

At the same time, in order to maintain the stability of the upper and lower walls of the ore body and the roof of the stope, a large number of ore pillars need to be left during the mining process. Destruction and blasting damage during mine recovery lead to lower production efficiency, poorer safety, higher cost and greater loss of ore resources in later recovery

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