Mechanized Combined Mining Method of Steeply Inclined Multilayer Thin Orebody

Abstract

The invention discloses a mechanical combined mining method for steep multi-layer thin ores. The multi-layer thin ores are combined into a vein, stope rooms are arranged in the direction of the vein,cap sill pillars of stope are reserved, and intermediate pillars are not reserved; a middle-section conveying roadway is arranged on the heading side of the vein, and a middle-section transverse driftis excavated in the direction perpendicular to the direction of the vein; panel ramps are arranged to connect an upper-section conveying roadway, a lower-section conveying roadway and the middle-section conveying roadway; segmented roadways parallel to the direction of the vein are excavated along the panel ramps, and layered cross gateways are excavated in the direction perpendicular to the direction of the vein; layered transverse drifts are excavated along the layered cross gateways; a vertical drop shaft is arranged on the heading side of the vein, and drop shaft cross gateways are excavated to be connected with the mining layered cross gateways; according to the different thicknesses of the ores, different mining methods are adopted for mining simultaneously, and completed access roads are filled in time; and air-return filling courtyards are excavated in the ores, and filter wells are erected along with layered filling. The mechanical combined mining method can adapt to mining of ore rock with poor stability and has the characteristics of high mechanization degree and low dilution and loss ratio.

Description

technical field [0001] The invention belongs to the technical field of underground mining, and in particular relates to a mechanized combined mining method for steeply inclined multi-layer thin ore bodies. Background technique [0002] With the continuous mining of metal mines, some complex and difficult-to-mine ore bodies have gradually become the mining targets of mining companies. Among them, the steeply inclined multi-layer thin ore body belongs to the complex difficult-to-mine ore body. Since the formation of the steeply inclined multi-layer ore body is often due to the fault structure being filled by the mineralized body, the ore body and the surrounding rock near the mine are usually relatively broken. . If the distance between ore veins is small (less than 2m), joint mining can be considered under the premise of considering the economic and technical indicators of the ore. The main disadvantage of joint mining is that the ore dilution rate is high; if the distance b...

AI Technical Summary

Problems solved by technology

The shallow hole ore retention method belongs to the open-field method, which requires relatively high stability of ore rocks. Its advantages are simple process, but its disadvantages are high dilution loss rate, poor working environment, high labor intensity, and low production efficiency; ) to the horizontal layered filling method belongs to the filling method, which has low requirements for the stability of ore rocks (the downward horizontal layered filling method can be used if the ore rock is extremely unstable), and its advantages are low dilution loss rate and good working environment. The disadvantage is that the process is cumbersome. In addition, due to the thin ore body, in order to control the mining and cutting ratio, the panel ramp and segmented roadway are often not used alone, so the degree of mechanization and production efficiency are relatively low; The advantage is that the dilution loss rate is low, and the disadvantage is that the working environment is poor and the process is cumbersome. Similar to the upper (lower) horizontal layered filling method, its degree of mechanization and production efficiency are relatively low.

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