A downward concave-convex unreinforced mosaic continuous layered filling mining method

Abstract

The invention relates to a downward concave-convex rib-free inlaying continuous layered filling mining method which comprises the following steps: (1) dividing an ore body into stages, and dividing the stages into a plurality of layers of middle sections in the height direction; (2) arranging a first-step stope in an ore room, arranging a second-step stope in an ore pillar, and enabling every 5-7stopes in rooms / columns to form a panel area; (3) adopting an extrapulse trackless accurate mining system, transferring mined ores of a central drift of each middle section and an upper wing ore bodyand an lower wing ore body to a panel draw shaft through a transfer layer connection channel, and completing the ore removal process of the stopes; and (4) guaranteeing that the stope of the middle section of each layer is composed of a central drift, a first layer and a second layer, completing the stoping work of each layer of the ore body of the first-step stope of the stope of the panel area,and conducting stoping on the second-step stope of the ore pillar of the panel area under the lateral protection of a first-step stope filling body. The filling mining method has the remarkable advantages that the production capacity of a panel stope is high, the ore drawing time is short, the mining safety is high, the resource loss is small, and the mining and filling process circulation substitution is reasonable.

Description

technical field [0001] The invention relates to a safe and low-loss mining method for broken ore bodies with extremely unstable ore rocks, high ore grades, and high economic value, and specifically relates to a downward concave-convex non-reinforced mosaic continuous layered filling mining method. Background technique [0002] For ore bodies with high grade and high economic value, especially under the technical conditions of extremely unstable ore rocks and extremely broken ore bodies, how to realize safe, efficient and low-loss mining of ore bodies is a global mining technology problem. On the one hand, the economic value of this type of ore body is large, and unreasonable mining methods will directly lead to a large loss rate and dilution rate in the mining process of mineral resources, resulting in an extreme waste of mineral resources; on the other hand, the ore rocks are extremely broken. The method cannot guarantee the effective cementation between each filling layer,...

AI Technical Summary

Problems solved by technology

On the one hand, the economic value of this type of ore body is large, and unreasonable mining methods will directly lead to a large loss rate and dilution rate in the mining process of mineral resources, resulting in an extreme waste of mineral resources; on the other hand, the ore rocks are extremely broken. The method cannot guarantee the effective cementation between each filling layer, and the strength of the layered filling body cannot meet the production requirements.

At the same time, it is difficult to effectively control the pressure of the stope, and the management of the stope roof is difficult. During the mining process, the problem of large-area caving of the filling roof often occurs, which brings major safety hazards to mining safety production.

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