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Method for recovering disc ore on incline ore block

A recovery method and ore body technology, applied in ground mining, earth square drilling, underground mining, etc., can solve problems such as low production efficiency, increased cutting blast holes, loss of triangular column ore bodies, etc., achieving flexible and convenient construction and simple methods easy effect

Inactive Publication Date: 2009-05-06
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

Since the cutting roadway is located within the ore-rock contact zone of the hanging wall, some triangular column ore bodies 9 may remain outside the cutting roadway without engineering control. If the first method is followed, the height of a section is considered when arranging the cutting work in the next section. Then cause the loss of the triangular column ore body 9, if the triangular column ore body 9 is recovered in the next segment, the depth of the cutting blast hole must be increased
The third method is: when the inclination angle of the ore body is large, usually around 45°~60°, the cutting roadway is arranged on the ore-rock contact zone (such as Figure 7 , 8 , 9), in the cutting roadway 1 along the direction of the ore body boundary line, construct the cutting blast hole 5 according to the row spacing of 1.5m to 2.5m, and construct the vertical or The forward-sloping upward fan-shaped mining medium-deep hole, after the cutting groove is formed, the mining operation is carried out in a backward order, and the production efficiency is low due to the shallow blast hole in the early stage of mining

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  • Method for recovering disc ore on incline ore block
  • Method for recovering disc ore on incline ore block
  • Method for recovering disc ore on incline ore block

Examples

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Embodiment 1

[0025]Example 1: In a production mine, the ore body has a strike length of 240m, a width of 45m, and an inclination angle of 45°. According to the occurrence conditions and shapes of the ore body, the mining method of segmental caving without pillars is adopted. The stage height is 120m, and the segment height is 120m. is 12m, and the approach distance is 10m. When the mining production progresses to -138m~-150m section, the mining approach 3 is constructed according to the layout of 1-2-1 on the section plane, and the construction progress of the prospecting roadway is ahead of other roadways, and the prospecting roadway is excavated The ore-rock boundary line is about 2m; the position of the cutting roadway is determined according to the ore-rock boundary line revealed by the roadway excavation. The body height can be smaller), carry out the excavation work of the cutting roadway; according to the requirements of the mine production process and parameters, set the vertically...

Embodiment 2

[0026] Example 2: In a large underground iron mine, the ore elevation is -89m. Above -186m, the plane projection of the ore body is in the direction of NE20°, the strike length of the ore body is 300m, the dip angle is 45°-60°, and the thickness varies greatly. According to the occurrence conditions of the ore body, the sub-section caving mining method without pillars is adopted, the sub-section height is 12m, and the approach distance is 10m. The first section is -90~-100m, which is used as the caving section in the initial stage of mine production, and the second section is -100~-112m, which undertakes the normal mining production tasks of the mine. When mining -100~-112m segmented ore, according to the traditional method, all the mining routes will be excavated from the ore body, and the cutting roadway will be arranged on the boundary of the upper wall ore rock to provide accurate excavation, mining rock drilling, and mining blasting. Waiting for work has brought a lot of...

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Abstract

The invention relates to a method for recovering hanging wall ores of a slant ore body, which mainly solves the technical problems of low ore recovery rate, large mining difficulty, low production efficiency and the like existing in the process of recovering the hanging wall ores of the prior slant ore body. When the slant ore body is exploited, an extracting drift is arranged according to the construction layout of a hanging wall prospecting drift, an ore rock boundary line and a hanging wall cutting tunnel, wherein the prospecting drift is dug out 1.5 to 3 meters from the ore rock boundary line, and the hanging wall cutting tunnel is arranged within the ore rock boundary line; the ore body height above the position of the hanging wall cutting tunnel is taken as a subsection, and a vertical upward cutting blast hole is arranged along the direction of the hanging wall cutting tunnel; and vertical or pitching upward back production fan-pattern holes are arranged according to ore caving step pitch and rock drilling row space in the back production direction. The method is suitable for the prior sublevel caving method without sill pillar and a novel technology of large space mining without the sill pillar.

Description

Technical field: [0001] The invention relates to a method for recovering hanging wall ore in underground mining, in particular to a method for recovering ore on the hanging wall of an inclined ore body, which is suitable for the traditional segmental caving mining method without pillars and the new technology of mining with large intervals and pillars without pillars. Background technique: [0002] Pillarless segmental caving method is a highly efficient mining method introduced from Sweden in the early 1960s in my country. Due to the advantages of simple structure and convenient management, this mining method was quickly adopted in underground mines in metallurgy, nonferrous metals, and chemical industries. promoted. The main technical parameters of the non-pillar segmental caving method include segmental height, approach distance, ore-caving step distance, etc. Its mining characteristics are: for mines that are constructed and mined in stages, in order to carry out excavati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22
Inventor 范庆霞李学海
Owner 宝钢集团上海梅山有限公司
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