Underground mining method

A mining method and ore body technology, applied in underground mining, surface mining, mining equipment, etc., can solve the problems of layered ore body caving, upper layer production layout damage, low strength of phosphate rock body, etc., to improve safety performance, improve recovery rate, and reduce exposure area

Active Publication Date: 2020-10-13
贵州开磷有限责任公司
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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

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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. The underground mining method comprises the following steps that a middle section is divided along the tendency of an ore body, a panel is dividedalong the trend of the ore body, a plurality of layers are divided along the tendency of the panel, a plurality of stopes are divided in each layer along the trend, and an in-vein rock drilling roadway and a cutting groove are constructed along top plates of the upper layer and the lower layer. According to the underground mining method, after 6-8 meters of cutting construction of the upper layer,personnel and equipment operate under effective support when the bottom of the lower layer is lifted, and a good free surface is provided for stoping operation; original thick ore bodies are dividedinto two parts during stoping, the exposed areas of the top plates of the stopes are reduced, the operation time of personnel and equipment in a goaf is shortened, and the safety of the personnel andthe equipment in the stoping process is greatly improved; and meanwhile, the upper part is stoped firstly so that the bottom plate delta ore can be efficiently recycled, and the ore recycling rate isgreatly improved.

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 Applications(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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