Downward single-drift type layered filling mining preparation layer arrangement method and arrangement structure

A layer layout and road type technology, which is applied in the field of preparation layer layout method and layout structure of downward single-entry layered filling mining, can solve problems such as easy instability and collapse, low operation safety, and difficulty in roadway formation

Pending Publication Date: 2021-12-24
北京金诚信矿山技术研究院有限公司 +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the preparation layer project is arranged along the vein, due to the fractured ore and rocks, the joints and fissures are relatively developed along the vein, it is easy to lose stability and collapse when the road is excav

Method used

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  • Downward single-drift type layered filling mining preparation layer arrangement method and arrangement structure
  • Downward single-drift type layered filling mining preparation layer arrangement method and arrangement structure
  • Downward single-drift type layered filling mining preparation layer arrangement method and arrangement structure

Examples

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Effect test

Embodiment 1

[0066] The 770-878mL section of a copper mine has an average dip angle of 70° between the 2040-2700 exploration line, the thickness of the ore circle is 6m at a grade of 1.5%, and the geological grade of Cu is 2.81%. There is about 2m thick rich ore in the footwall of the ore body, and the Cu grade is 3%-6%. There are generally three to four dominant joint groups in the ore body, and the poor quality is easy to collapse. Adjacent to the footwall of the ore body is an extremely unstable and weak rock formation with a thickness of 0.5-2m. The design adopts the reinforced concrete false roof downward layered filling mining method for mining, and the preparatory layer works are arranged along the veins. During the construction process, due to the broken ore rock, the roof and side wall rocks are easy to collapse, and the working environment of workers cannot be guaranteed. In addition, , the preparatory layer project is arranged along the vein, the support strength is relatively ...

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Abstract

The invention relates to a downward single-drift type layered filling mining preparation layer arrangement method. The method comprises the following steps that S1, after a section connection roadway is constructed from an opening of a vein outer section roadway to an ore body footwall by a certain distance, a short vein connection roadway is constructed along one side of a vein; S2, a short vein is tunneled from the short vein connection roadway to an ore body hanging wall, and then a reinforced concrete artificial false roof and bottom is constructed in the short vein; S3, after the strength of the reinforced concrete artificial false roof and bottom meets the requirement, a retaining wall is constructed on the reinforced concrete artificial false roof and bottom, and the reinforced concrete artificial false roof and bottom is filled with paste for roof connection; and S4, a next short vein is constructed, and the step S2 is repeated. According to the method, construction is easy and convenient, the stability in the tunneling process is good, and the safety performance is better.

Description

technical field [0001] The invention relates to the technical field of mining in non-ferrous mines, in particular to a downward single-entry layered filling mining preparation layer arrangement method and arrangement structure. Background technique [0002] The downward single-entry layered filling mining method is a relatively mature mining method. The ore body mined has the characteristics of instability, fragility, and high value. It is widely used in non-ferrous mines with unstable ore rocks in my country. [0003] A certain mine has well-developed rock joints and fissures, and is extremely unstable. The ore body is distributed in layers, with a dip angle of 65°-87°, with an average dip angle of 75°. The average thickness of the ore body is about 6m, and the average grade is 2.35%. [0004] Downward single-entry layered filling method is adopted for mining. When the preparation layer project is arranged along the vein, due to the fractured ore and rocks, the joints and ...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/15E21D11/18E21D20/00E21D20/02E21D21/00
CPCE21D11/10E21D11/152E21D11/18E21D20/00E21D21/0026E21D20/02
Inventor 王红心李占炎杨清平尚继林李辉陈志强祝泽辉袁平勇梁权宇秦帅余乐明
Owner 北京金诚信矿山技术研究院有限公司
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