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Pillarless sublevel caving method based vertical partitioning and combined ore drawing extraction technology of gently inclined ore bodies

A segmented caving method and vertical zoning technology, which is applied in ground mining, earth square drilling, underground mining, etc.

Inactive Publication Date: 2012-05-09
SOUTHWEAT UNIV OF SCI & TECH +1
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Problems solved by technology

[0004] Purpose of the invention: In order to meet the needs of the application of the pillarless segmental caving method in the gently inclined medium-thick ore body, solve the effective mining of the triangular ore body in the upper and lower walls of the segment A series of problems, such as the effective recovery of segmental ore volume, the effective recovery of residual ore in the footwall, and the realization of timely replenishment and caving, etc., according to the special movement law of the caving rock and the movement law of the caving overburden in the non-pillar sub-caving method, the design A new mining technology of "vertical division and combined ore drawing" without pillar-less segmental caving method is proposed, the purpose of which is to reduce the loss and dilution index of the non-pillar segmental caving method in the application of gently inclined medium-thick ore bodies, and improve the Technical and economic benefits of mining

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  • Pillarless sublevel caving method based vertical partitioning and combined ore drawing extraction technology of gently inclined ore bodies
  • Pillarless sublevel caving method based vertical partitioning and combined ore drawing extraction technology of gently inclined ore bodies
  • Pillarless sublevel caving method based vertical partitioning and combined ore drawing extraction technology of gently inclined ore bodies

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Embodiment Construction

[0012] The mining technology of "vertical partition and combined ore drawing" mining technology of gently inclined ore body without bottom pillar caving method is characterized by "vertical partition and combined ore drawing; timely supplementary caving and full coverage of footwall residue".

[0013] A. Take the vertical line at the junction point of the mining approach and the ore body hanging wall boundary, and the ore body range between the two vertical lines between two adjacent segments is a "vertical partition". For actual ore bodies with irregular shapes, the range of vertical partitions can be appropriately adjusted according to the boundary between the mining approach and the upper and lower walls of the ore body. The principle is to facilitate the layout of mining blast holes and the full recovery of ore.

[0014] B. In the loose ore drawing and pressure relief section (Ⅰ) of the upper wall, fan-shaped blastholes with rectangular rows are arranged ( figure 1 As sho...

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Abstract

The invention discloses a pillarless sublevel caving method based extraction technology used under the condition of gently inclined ore bodies. A series of problems of the pillarless sublevel caving method under the condition of gently inclined ore bodies such as efficient extraction of sublevel hanging wall and footwall triangle ore bodies, sublevel transition ore quantity, efficient recovery of footwall residual ores, timely supplementing and caving realization and the like are solved by the technical measures such as vertical partitioning, combined ore drawing, timely supplementing and caving, footwall residue full covering and the like. By designing the new pillarless sublevel caving method based vertical partitioning and combined ore drawing extraction scheme suitable for the condition of gently inclined ore bodies, the loss and dilution indexes when the pillarless sublevel caving method is applied under the condition of gently inclined ore bodies can be substantially reduced and the technical and economic benefits of mining can be increased.

Description

technical field [0001] The invention relates to an underground mine mining method, which belongs to the engineering technical field of reducing ore loss and dilution in the mining process by using a new mining technology. Background technique [0002] The pillarless segmented caving method with vertically laid out mining approaches is an underground mining method widely used in steeply inclined thick and large ore bodies. In recent years, it has also been gradually applied to gently inclined medium-thick ore bodies. When this method is applied to a gently inclined ore body, the following unfavorable situations will occur: ① The proportion of the triangular ore body in which the upper and lower walls are mined with mixed rocks increases significantly; The segmental "transition ore volume" such as the residual ridge cannot realize the complete transfer to the downward segment; ③The residual ore in the footwall is difficult to fully recover due to the slow dip angle. The emerg...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22
Inventor 张志贵陈忠华陈星明韩方建苏华友叶青谭宝会孙文勇
Owner SOUTHWEAT UNIV OF SCI & TECH
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