Mining method for bottom ore breaking and ore removal

Abstract

The invention discloses a mining method for bottom ore breaking and ore removal. The mining method comprises the following steps that ore chambers and ore pillars are arranged according to the trend of an ore body; mining preparation cutting work is carried out, and a stage haulage way can be arranged inside or outside a vein; stoping and ore breaking are carried out; and ore removal is carried out, and plain tailings are used for filling and roof contact. According to the mining method for bottom ore breaking and ore removal, the stoping height of the chambers and the pillars is changed, bottom ore removal structures of the ore chambers and the ore pillars are evenly distributed in raw rock, namely, ore removal bottom structures of the ore chambers are distributed in the ore pillars, oreremoval bottom structures of the ore pillars are distributed in the ore chambers, the procedure of constructing a manual false roadway is omitted, ore removal is flexible, labor intensity is low, andore removal efficiency is high; by forming a staggered top pillar structure, high-proportion cement tailings are adopted for cemented filling, and after stoping of a whole ore block is finished, recovery is carried out through a drift method, so that top and bottom pillar stoping is achieved; and the problems that the one-time mining height of mining of a layered filling method is small, ore is prone to being mixed into filling bodies, and the ore dilution loss is large are also avoided.

Description

technical field [0001] The invention belongs to the technical field of mining, and more specifically relates to a mining method for bottom-fall ore extraction. Background technique [0002] The mining method is the general term for mining, cutting, and mining. It includes three tasks: mining, cutting, and mining. The mining is arranged according to the size of the elements of the ore block. , transportation of equipment and materials, ventilation and communication issues; cutting creates the necessary free surface and ore-dropping space for mining; after these two tasks are completed, large-scale mining will be carried out directly. In the space, these three tasks are connected and organically coordinated in time and space in turn. This work is collectively called the mining method. In the mining method, the three tasks of ore falling, ore handling and ground pressure management are completed. The specific process of the main operations and their mutual cooperation in time ...

AI Technical Summary

Problems solved by technology

[0003] For pillar mining of thick and large ore bodies, most mines adopt the low-efficiency upward layered filling mining method or upward approach mining method. Because the ore pillar is affected by the damage and cutting of medium and deep hole blasting during mine recovery, The stability of the rock mass has dropped significantly, and the mining conditions of the ore pillars have deteriorated extremely. The long strip-shaped ore pillars are surrounded by filling bodies on both sides, and the mining sequence is from bottom to top. When the bottom of the ore pillars is exposed, the ore pillars completely rely on the filling on both sides The combined action of the cohesive force of the body, the tensile stress of the rock stratum itself, and the cantilever beam of the upper and lower rock strata can be supported. When the stability of the pillar is poor, the upper pillar may sink as a whole or collapse in a large area, causing major safety accidents. , using the upward layered filling mining method or the approach method for mining, the mining process is complicated, the labor intensity of the workers is high, the labor organization is complicated, the production capacity of the stope is small, the mining cost is high, and the loss rate is high