Medium-length-hole room-and-pillar method of synchronically forming barrier pillars

A fan-shaped medium-deep hole and ore pillar technology, which is applied in ground mining, underground mining, special mining, etc., can solve the problems of high ceiling in the stope, inability of ore to slide by itself, and difficulty in roof management, so as to achieve large production capacity and shorten the production time. The recovery cycle and the effect of improving the ore recovery rate

Inactive Publication Date: 2016-12-21
NORTHWEST RES INST OF MINING & METALLURGY INST
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Problems solved by technology

The inclination angle of the ore body is slow, and the ore cannot slide by itself, so it needs to be transport

Method used

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  • Medium-length-hole room-and-pillar method of synchronically forming barrier pillars
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  • Medium-length-hole room-and-pillar method of synchronically forming barrier pillars

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Embodiment 1

[0020] A phosphate mine is a national key construction project. The mine has successively tested the inclined fan-shaped medium-deep hole room-and-pillar mining method, the gently inclined segmented open field method, and the medium-deep hole room-and-pillar method of the present invention that synchronously forms spaced pillars. The orebody dip angle of the test site is 35~39°, the thickness is 10~11m, and the hardness coefficient is 8~12. 5m wide continuous ore pillar 1, one ore block is arranged every 20m in the panel; in the ore block, the span of the mine room is 15m, the width of the interval pillar 3 is 5m, and the size of the interval pillar 3 is 5×6~5×8m , the top column 2 is 3m thick, and the vertical height of the bottom structure is 8~12m.

[0021] The mining and cutting work of this mine is as follows: a, transport level roadway 7 is arranged in the surrounding rock of the ore body floor, excavates a mine shaft 8 from the transport level roadway 7 to each ore bloc...

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Abstract

The invention belongs to the technical field of mining methods and particularly relates to a medium-length-hole room-and-pillar method of synchronically forming barrier pillars. In the method, an ore body is divided into a plurality of panels by each 100 m, wherein continuous pillars being 5 m in width are reserved between the panels; in the panels, a plurality of ore blocks are arranged by each 20 m, height of the ore blocks being 25-35 m; in each ore block, ore room span is 15 m, width of the barrier pillar is 5 m, size of the barrier pillar is 5*6 - 5*8 m, top pillar is 3 m in thickness and vertical height of a bottom structure is 8-12 m. In the invention, two rock drilling slope heading structures are drilled along the two sides of the ore room, so that the boundary of the ore room is controllable and barrier pillars are convenient to stope. Meanwhile, a goaf has a regular form so that stoping rate of ore is increased. All of the stoping is carried out with the medium-length holes, and medium-length-hole drilling is completed all before the ore break down of the ore blocks, thereby reducing stoping period of the ore blocks; the method achieves the synchronic stoping of the ore in the ore room and the ore in the barrier pillars; along with the advance of the working face, the barrier pillars are formed gradually.

Description

technical field [0001] The invention belongs to the technical field of mining methods, and in particular relates to a medium-deep hole room-and-pillar method for synchronously forming spaced ore pillars. Background technique [0002] The mining of gently inclined medium-thick ore bodies with a dip angle of 15°-35° and a thickness of 6-20m has always been a difficult problem at home and abroad. The inclination angle of the ore body is slow, and the ore cannot slide by itself, so it needs to be transported mechanically or manually. However, the open roof of the stope is high, and the roof management is difficult. According to the statistics of domestic gently inclined medium-thick orebody mines. The room-and-pillar mining method accounts for 50%; while foreign ore bodies of this type mainly use the room-and-pillar method, and its proportion reaches 61%. Therefore, the continuous application of new techniques, new materials, new technologies and new equipment in practice, and...

Claims

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Application Information

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IPC IPC(8): E21C41/00
CPCE21C41/00
Inventor 焦满岱刘武团张海磊雷明礼严文炳郭生茂柴衡山秦剑伟孟慧媚刘财林张睿高忠赵文奇
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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