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Mining method of thin minor ore body

A mining method and technology for small ore bodies, which are used in surface mining, earth-moving drilling, underground mining, etc., can solve the problems of subsidence and cracks in surface industrial sites, threatening the safety of surface structures, and high ore loss and dilution rate, so as to reduce ore The effect of loss, reducing ore dilution rate and improving recovery rate

Active Publication Date: 2015-08-19
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology

[0002] For the ore body with an average thickness of less than 2.5m, the mine used the shallow hole retention method for mining in the past. During the mining process, the hanging wall rock collapsed seriously, the amount of temporary support was large, the safe operating conditions were poor, and the ore loss and dilution rate was high. ;The empty areas formed in the mining process are generally not treated, resulting in partial subsidence and cracks in the surface industrial sites, threatening the safety of surface structures and not conducive to safe production

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  • Mining method of thin minor ore body
  • Mining method of thin minor ore body
  • Mining method of thin minor ore body

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Embodiment Construction

[0032] A method for mining a thin ore body, specifically comprising the following steps;

[0033] 1) Accurate cutting:

[0034] a. If figure 1 , 2 As shown, the inclined or sharply inclined thin ore body is divided into several mining areas according to the length of the strike. Generally, the length of a mining area is 100m, the height of the stage is 50m, and the height of the segment (layer) is 7m. The manpower shaft 8 also enters the wind shaft, and the ore body footwall is designed to arrange the filling shaft 10 from the surface to the mining area, and the ore chute 9 from the mining area to the next stage, and connects with the mining area through the connecting road 13.

[0035] b. On the top of the mining area, along the ore body, excavate the upper subsection mining transportation roadway 3 and the return air lane in the mining area, and excavate the lower subsection mining transportation tunnel 4, from the lower subsection mining transportation tunnel 4 to the up...

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Abstract

The invention discloses a mining method of a thin minor ore body, which comprises the steps of ore recovery and goaf filling, which are alternatively circularly performed from bottom to top in a horizontal layering manner, propelling is performed along with a work surface, lime, loess, dead rock and the like are adopted and mixed layer by layer to fill a goaf, a filling body supports hanging wall and heading wall surrounding rocks, and serves as a work platform of upper layering recovery and ore removal, the ore is conveyed to an ore chute with a mechanical method, spallation ore removal of each recovery spallation step length and the filling procedure of the goaf are performed alternatively, when the uppermost horizontal layer of a chamber is recovered, mechanical and manual fill tightening are performed. The method solves the problem of discharge of tunneled dead rocks, effectively processes the goaf, prevents surface subsidence, accords with requirements of circular economic development and green ore construction. Compared with a shallow hole shrinkage method, the mining method has the advantages of improving ore recovery rate, reducing ore dilution rate and improving ore removal grade and ore removal efficiency through production practice.

Description

technical field [0001] The invention relates to underground mining of metal mines, in particular to a mining method for thin and small ore bodies. Background technique [0002] For the ore body with an average thickness of less than 2.5m, the mine used the shallow hole retention method for mining in the past. During the mining process, the hanging wall rock collapsed seriously, the amount of temporary support was large, the safe operating conditions were poor, and the ore loss and dilution rate was high. ; The empty areas formed in the mining process are generally not treated, resulting in partial subsidence and cracks in the surface industrial sites, threatening the safety of surface buildings and structures, which is not conducive to safe production. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a mining method for thin and small ore bodies. [0004] The present invention adopts followi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22
CPCE21C41/22
Inventor 李德忠王建军蔡立丰王多成王永智
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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