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Arrangement method for initial mining sublevel stoping drift with sublevel caving method

A technology of subsection caving method and layout method, which is applied to the layout field of the first mining subsection mining approach of the subsection caving method without bottom pillars, can solve the problems of large construction volume, low mining recovery rate and high construction cost, and achieves The effect of saving engineering volume and engineering costs, increasing the amount of ore collapsed, and reducing mining costs

Inactive Publication Date: 2010-08-18
宝钢集团上海梅山有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional design method is: according to the occurrence conditions and shape of the ore body and the production scale of the mine, determine the stage height, segment height and approach distance. Segment height = 1.0~1.2 approach spacing. With the advancement of mining theory, that is, the application of large-space pillarless mining technology, the approach spacing = 1.0~1.5 segment height is currently used. On this basis, the first mining is completed. The mining design of the subsection and the second subsection and the roof treatment plan of the goaf, referring to Figure 1, below the ore boundary line 4 are the first mining subsection 5, the second subsection 6, the third subsection 7 and the fourth subsection Segment 8, referring to Figures 2 and 3, the mining approach 3 is set at the junction of the segments, and is set at intervals of 2 and 1, and the mining blast hole 1 is fan-shaped to control the range of the caving body, which is slightly larger than the ellipse when mining and discharging Emitting body 2, the subsection height of the first mining subsection is the same as that of other subsections, resulting in a large amount of capital construction and high construction costs of the mine. Poor economic benefit

Method used

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  • Arrangement method for initial mining sublevel stoping drift with sublevel caving method
  • Arrangement method for initial mining sublevel stoping drift with sublevel caving method
  • Arrangement method for initial mining sublevel stoping drift with sublevel caving method

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Effect test

Embodiment 1

[0022] Embodiment 1: For a new mine, according to the occurrence conditions and the form of the ore body (the boundary line of the ore rock is about +186m), the stage height is 120m, the segment height is 12m, and the approach distance is 15m. Below the rock boundary line 4 are the first mining segment 5, the second segment 6, the third segment 7 and the fourth segment 8 in sequence. Blasthole 1 controls the range of the caving body in a fan shape, which is slightly larger than the elliptical discharge body 2 during mining and drawing. The original design floor elevation of the first mining section approach is +174m, and the second section approach floor elevation is +162m. And so on. According to the present invention, the floor elevation of the first mining section 5 approach is +162m (in order to reduce the difficulty of mining and cutting work, a cutting roadway can be designed on the floor elevation of the original first mining section +174m to pull the cutting groove), t...

Embodiment 2

[0023] Embodiment 2: For a certain production mine, according to the occurrence conditions and forms of the ore body, the stage height is 120m, the segment height is 15m, and the approach distance is 20m. As the mining work is carried out, when the mining work is carried out At -243m, the shape of the caving body (slightly larger than the emanating body 2) changes, and new caving bodies (slightly larger than the emanating body 2) are added in a large range between -243m and -228m, and the caving body (slightly larger than the emanating body 2) is added above -243m The height is about 10~12m. The original design normally arranges the mining approach at -243m (the floor elevation of the mining approach is -243m). The elevation of the road floor is -258m, which is the second subsection for the mining of newly added caving bodies (slightly larger than the discharge body 2), and the mining blast hole 1 is designed and constructed at -243m and -258m respectively. According to the p...

Embodiment 3

[0024] Embodiment 3: For a certain production mine, according to the occurrence conditions and forms of the ore body, the stage height is 120m, the segment height is 15m, and the approach distance is 15m. As the mining work is carried out, when the mining work is carried out The shape of the ore body changes at -198m, and caving bodies (slightly larger than discharge body 2) are added in a large range between -213m and -198m, and the height of caving bodies (slightly larger than discharge body 2) above -198m is about 2~3m . The original design normally arranges the mining approach at -213m (the floor elevation of the mining approach is -213m). The elevation of the road floor is -228m, which is the second subsection for the mining of newly added caving bodies (slightly larger than discharge body 2), and mining blastholes are designed and constructed at -213m and -228m respectively. According to the present invention, for large-scale newly-added caving bodies between -213m~-198...

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Abstract

It relates to a method of drift slicing sublevel stopping without bottom post with reduced working load, expenses, construction cycle, and improved exploration ratio and return rate. It decides the stage height, section height, in path distance through the conditions and forms of the reserve, production scale of the ore, two times of sublevel height.

Description

technical field [0001] The invention relates to an underground mining technology, in particular to a layout method for the first-mining and segmented mining approach of the pillarless segmental caving method, which is suitable for the traditional segmental segmental caving method without pillars and the new technology of large-space pillarless mining. Background technique [0002] Pillarless segmented caving method is a mining method with simple structure, high safety and high efficiency, and convenient management. It is widely used in underground mines in metallurgy, nonferrous metals, and chemical industries in my country. For a long time, the mining design of pillarless mines in my country has been mainly based on the relevant technical regulations of the domestic mining industry, the occurrence conditions of the ore body, and the level and progress of mining technology at home and abroad, and the stage height, segment height, progress Road spacing and layout. In order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/16
Inventor 范庆霞金闯
Owner 宝钢集团上海梅山有限公司
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