Non-solid waste filling mining method for gently inclined medium-thick ore bodies based on ellipsoid drawing structure

Abstract

The invention relates to a filling mining method without solid waste of a gentle dip medium-thickness ore body based on a spheroid ore drawing structure. According to the method, based on a bulk solidore drawing theory, a segmented spheroid ore structure is established, a two-step filling technology of gravel and full milltailing cementation is applied to solve the technical problems that the existing mining method of the gently dip medium-thickness ore body, mining ore removal is high in loss rate, ore removal has great difficulty, surface subsidence is caused by mining, and the ecological environment is polluted by stockpiling waste rocks and milltailings, and the like. According to the method, the mining loss can be effectively controlled, the ecological environment can be protected, the two-step filling technology of the gravel and full milltailing cementation can be used comprehensively to eliminate surface subsidence, and a no-solid-waste mining technology that waste rocks whichdo not come out vaults and the milltailings which fill into the underground empty area is realized in the mining process.

Description

technical field [0001] The invention relates to a non-solid waste filling mining method of a gently inclined medium-thick ore body based on an ellipsoid ore drawing structure in the field of underground mining. Background technique [0002] Underground mining refers to the technological process of mining underground mineral resources through reasonable mining methods. Due to the variability of ore body shape, inclination, thickness, and physical and mechanical properties of ore rocks in underground mines, underground mine mining faces many challenges in terms of safety, mining efficiency, and ecological environment. For a long time, how to realize the safe and efficient mining of gently inclined medium-thick ore bodies (inclination angle 20~45°, thickness 10~15m) and ensure that the earth's ecological environment is not damaged is a world mining technology problem. A review of related literature shows that there are currently the following problems in the mining of gently i...

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Problems solved by technology

[0003] (1) The mining of mineral resources has a large loss: for gently inclined ore bodies, since the inclination angle of the ore body is smaller than the natural repose angle of the caving ore, it is impossible to realize the self-sliding ore release of the ore

On the one hand, some mines adopt segmented mining method, but in the process of practice, it is found that a large amount of ore will still be retained in the stope segment, and the ore loss rate in the stope reaches 20~35%.

On the other hand, some mines use blasting and throwing to achieve strong ore extraction. In practice, there are problems such as poor blasting effect and complicated blasting design parameters. It often occurs that the blasting effect cannot meet the design requirements and cannot achieve normal ore extraction.

Therefore, at the present stage, no matter adopting the segmented mine room method or blasting and throwing, the mining problems of this type of ore body have not been well solved.

[0004] (2) Ecological and environmental protection issues: During the mining of mineral resources, the damage to the ecological environment is mainly concentrated in the following three aspects. One is mining subsidence; or agricultural land, and at the same time, due to the sun and rain, it indirectly affects the groundwater system; the third is the tailings accumulation problem caused by the beneficiation process

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