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An underground mining method

A mining method and ore body technology, applied in underground mining, surface mining, mining equipment, etc., can solve problems such as layered ore body caving, upper layer production layout damage, low strength of phosphate rock body, etc., to improve recovery The effect of improving the efficiency, improving safety, and reducing the exposed area

Active Publication Date: 2021-12-14
贵州开磷有限责任公司
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] The mining method of gently inclined medium-thick and thick phosphate ore bodies has always been an international mining problem, and the strength of the phosphate ore body itself is not high. When the thickness of the phosphate ore body becomes thicker, the stratified ore body will cause natural caving during the mining process , the production layout of the upper layer is severely damaged, and the traditional roof drilling roadway mining has high requirements for rock drilling equipment and workers' skills, and the loss of the triangular ore in the floor part cannot be effectively controlled

Method used

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  • An underground mining method
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Effect test

Embodiment 1

[0041] As mentioned above, an underground mining method, the steps are as follows:

[0042] (1) Firstly divide the middle section along the ore body tendency, the height of the middle section is 80-100m, and divide the panel area along the ore body trend, the panel area length is 600m.

[0043] (2) A layer is divided every 10m along the inclination in the panel.

[0044] (3) Divide a stope every 20m along the strike in the stratification.

[0045] (4) The upper and lower layers in the stope will drill 24m of rock-drilling roadway along the roof construction vein, and the support method is combined support of bolt + anchor net + anchor cable.

[0046] (5) The upper layer is set back 6.25m from the end of the rock-drilling roadway in the vein to form a middle-up construction cutting groove with a length of 8-10m. The cutting groove section is 5.4m wide, 4.5m wide at the bottom, and 3.5m high. It is the combined support of anchor rod + anchor net + anchor cable.

[0047] (6) T...

Embodiment 2

[0056] Take the mining of the S3# mining house at layer 510 in the south third panel area of ​​the 480 middle section of the Shaba soil mine of Guizhou Kailin Group as an example:

[0057] The inclination angle of the ore body in this mine is 30-32°, and the thickness of the ore body is 10-15m. It is a typical gently inclined thick ore body, with a geological reserve of 14,350 tons. Before mining, the upper and lower layers are cut at the corresponding position of the rock drilling roadway in the vein. When mining, the upper part of the ore body is first recovered, and then the ore body is mined from the cutting groove to the end of the rock drilling roadway in the vein, and finally the ore body is mined from the cutting groove to the opening of the rock drilling roadway in the vein. The ore recovery rate is 97%, and the dilution rate is 5 %, tailings cemented filling is used for filling.

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Abstract

The invention provides an underground mining method. Firstly, the middle section is divided along the ore body tendency, and the panel area is divided along the ore body trend. In a stope, along the roof of the upper and lower layers, the rock drilling roadway and the cutting groove in the vein are constructed. In the present invention, after the upper layer is cut and constructed for 6-8 meters, the personnel and equipment work under the effective support when the lower layer is lifted to provide a good free surface for the mining operation; The exposed area of ​​the roof of the stope is reduced, the working time of personnel and equipment in the goaf is reduced, and the safety of personnel and equipment in the mining process is greatly improved; at the same time, the upper part of the mining can be recovered efficiently. the recovery rate of ore.

Description

technical field [0001] The invention relates to an underground mining method, which belongs to the technical field of mining, in particular to an underground mining method for gently inclined medium-thick and thick phosphate ore bodies. Background technique [0002] The mining method of gently inclined medium-thick and thick phosphate ore bodies has always been an international mining problem, and the strength of the phosphate ore body itself is not high. When the thickness of the phosphate ore body becomes thicker, the stratified ore body will cause natural caving during the mining process , the production layout of the upper layer is severely damaged, and the traditional roof drilling roadway mining requires high technical requirements for rock drilling equipment and workers, and the loss of the triangular ore in the floor part cannot be effectively controlled. Contents of the invention [0003] In order to solve the above technical problems, the present invention provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/22E21C37/00E21F15/00
CPCE21C41/22E21C37/00E21F15/005E21F15/00
Inventor 杨杰王停张寿沈海亮陈汉廷
Owner 贵州开磷有限责任公司
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