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Flat-bottomed pillar sublevel caving method of reinforced concrete structure artificial roof

A segmented caving method and artificial false roof technology, which is applied in ground mining, mining equipment, earth square drilling, etc., can solve the problems of lack of research on waste rock funnel control, improve ore recovery rate, reduce ore dilution, and solve The effect of loss impoverishment

Active Publication Date: 2012-01-04
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

[0005] The waste rock funnel formed in the ore drawing process is the most direct cause of the ore loss rate and dilution rate, but there is a lack of research on the control of the waste rock funnel at home and abroad

Method used

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  • Flat-bottomed pillar sublevel caving method of reinforced concrete structure artificial roof
  • Flat-bottomed pillar sublevel caving method of reinforced concrete structure artificial roof
  • Flat-bottomed pillar sublevel caving method of reinforced concrete structure artificial roof

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Embodiment Construction

[0028] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] like figure 1 , figure 2 As shown, the flat-bottomed structure of the artificial false roof with steel-concrete structure of the present invention has the segmental caving method of the bottom column, including segmental mining under the cover rock stratum, the upper and lower segmental mining approaches are rhombus-shaped and staggered, and the mining approach is arranged with chisel The rock roadway 1 and the bottom structure adopt electric rake to extract the ore. The electric rake out ore bottom structure is composed of the ore-receiving roadway 2 and the electric rake roadway 3. The retreating mining is carried out from the end of the mining approach, and the rock-drilling roadway 1 and the receiving In the mine roadway 2, the pre-concentrated rock drilling method is adopted to arrange the upward fan-shaped medium-dee...

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Abstract

The invention relates to a flat-bottomed pillar sublevel caving method of a reinforced concrete structure artificial roof. The method comprises the following steps of: performing sublevel stoping under a covering rock formation, wherein upper and lower sublevel stoping inlet passages are arranged in a diamond-shaped staggered mode in space, and provided with mining tunnels and bottom structures; and adopting scraper ore removal. The method is characterized in that: a scraper ore removal bottom structure adopts a flat-bottomed scraper bottom structure; before ore-bearing tunnels in all inlet passages under which the stoping inlet passages are formed are blasted to form bottom structures, along with the stoping of a stoping working surface, the reinforced concrete structure artificial roof with the same width as that of the ore-bearing tunnels is continuously paved at waste rock funnel control points of the ore-bearing tunnels; and all the inlet passages just above which the artificial roofs are arranged perform the ore removal under the covering of the reinforced concrete structure artificial roofs. The method has the advantages that: during ore removal, the artificial roofs can effectively prevent the formation of waste rock funnels, the ore stoping rate is improved, and the problem of loss and dilution is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of underground mining methods, in particular to a flat-bottomed structure with a steel-concrete artificial false roof [0002] Column subsection caving method. Background technique [0003] The segmental caving mining method with pillars is one of the high-intensity mining methods, and has been widely used at home and abroad. This method has a variety of mining schemes, which can be used to mine various ore bodies with different conditions. It is flexible and adaptable Widely used, it has become a mining method that occupies a considerable position in non-ferrous mines. The segmental caving mining method with pillars is to divide the ore body into stages, and the stages are further divided into several segments. When mining thicker ore bodies, it is necessary to arrange multiple mining routes. The upper and lower segmental mining routes are diamond-shaped in space. Arranged in a staggered manner, from top ...

Claims

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Application Information

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IPC IPC(8): E21C41/22E21D19/00
Inventor 邵安林
Owner ANSTEEL GRP MINING CO LTD
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