Non-pillar sublevel caving mining method for discharging ores from side part of electric rake roadway

A technology of electric raking roadway and sub-caving, which is applied in surface mining, underground mining, special mining, etc., can solve the problem of high one-time investment, and achieve the effect of reducing mining cost and high rock drilling efficiency.

Active Publication Date: 2014-03-26
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to propose a sub-column sub-caving mining method using electric rakes to extract ore from the side of the roadway, which can effectively improve the ventilation effect of the approach, has the characteristics of safety and reliability, and can be replaced by cheap and practical mine electric rakes. Expensive front loaders to solve the problem of high investment at one time, greatly reducing mining costs

Method used

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  • Non-pillar sublevel caving mining method for discharging ores from side part of electric rake roadway
  • Non-pillar sublevel caving mining method for discharging ores from side part of electric rake roadway
  • Non-pillar sublevel caving mining method for discharging ores from side part of electric rake roadway

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Embodiment

[0029] Taking a certain mine as an example, the segmental connection roadway described in the present invention has a height × width of 3 m × 3m; the mining approach height × width is 3 m × 2m; The height × width of the mine chute is 2 × 2m; the height × width of the upper wall exhaust roadway is 0.8 m × 1.5m or 1 m × 1.5m. The size of the approach can be reduced, but considering that if the size of the mining approach is small, it is very unfavorable to release the ore that collapses in the approach, so the mining approach still chooses a large section. With this method of mining, the amount of mining and cutting work will increase relatively, but the increased electric rake roadway and the ore-sliding horizontal roadway connected in the middle will bring a considerable amount of ore, which offsets the cost of mining and cutting. At the same time, the self-propelled rubber-tyred front-end loader, which is expensive in price, operation and maintenance, is replaced by a cheap a...

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Abstract

The invention relates to a non-pillar sublevel caving mining method for discharging ores from a side part of an electric rake roadway. The method comprises the following steps: dividing an ore body into phases, and dividing each phase into segments; arranging segmented accesses in a rhombic staggered manner; excavating a way shaft and an ore chute from a foot-wall phase haulage way to an upper phase foot-wall haulage way along one end of an ore block; then, initially excavating a segmented connection roadway in a first segment of the current phase. The method is characterized in that the rhombic staggered arrangement refers to an arrangement manner of recovering accesses among segments; after the excavation of recovering accesses of the current segment is completed, an electric rake roadway is excavated between the two recovering accesses of the segment and parallel to the recovering accesses; ore crosscuts are excavated at certain intervals between the recovering accesses and the electric rake roadway; a hanging-wall exhausting roadway communicated with the electric rake roadway is excavated from the inner end of the electric rake roadway to the outer side of a mineral vein. Compared with the traditional non-pillar sublevel caving mining method, the non-pillar sublevel caving mining method, provided by the invention, has the advantages of high safety, low cost, good blasting effect, and high rock-drilling efficiency.

Description

technical field [0001] The invention belongs to the technical field of underground mining, and in particular relates to a pillarless segmental caving mining method using an electric rake to extract ore from the side of a roadway. Background technique [0002] In the past 30 years, in our country, many metal and non-metal underground mines have applied the sub-level caving mining method without pillars. [0003] The pillarless segmented caving mining method is to divide the ore body into stages and then divide it into segments with segmented roadways, and then divide the segments into sections. Each section has a mining approach, and each section has There is no special ore-drawing bottom structure, but the ore is directly dropped and transported in the mining route. The strips are mined in a certain order, and the segments are mined from top to bottom. With the recovery of segmented ore, the upper covering rock falls and fills the goaf. Strip mining is to excavate upward ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22
Inventor 张建柴青平赵亮
Owner ANSTEEL GRP MINING CO LTD
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