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Dilapidation method of horizontal ore pillar after stage room mining method extraction

A mining method and pillar technology, which is applied in the caving field of horizontal pillars, can solve the problems that horizontal pillars cannot be drilled, and achieve the effects of reducing construction cost and construction time, reducing the number of drilling holes, and reducing construction difficulty

Inactive Publication Date: 2020-02-14
FUJIAN HAIXIA KEHUA FUXING CONSTR ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is: how to solve the problem that the horizontal ore pillar cannot be drilled when the ore exiting route is not cleared after the recovery of the stage mining method

Method used

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  • Dilapidation method of horizontal ore pillar after stage room mining method extraction
  • Dilapidation method of horizontal ore pillar after stage room mining method extraction
  • Dilapidation method of horizontal ore pillar after stage room mining method extraction

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Embodiment 1

[0029] A caving method of the horizontal ore pillar 5 after the recovery of the stage mine mining method, specifically comprising the following steps:

[0030] Step 1: The vertical ore pillar 6 on both sides of the horizontal ore pillar 5 is provided with an ore-exiting approach 1 and an ore-exiting roadway 2, and a rock drill is arranged in the ore-exiting roadway 2 on the opposite side of the ore-exiting approach 1, facing the horizontal ore pillar 5 Direction Use a rock drill to drill inclined long holes 3;

[0031] Step 2: Fill explosives into the long hole 3 to collapse the horizontal pillar 5; the long hole 3 includes a charge section and an empty hole section, the charge section is located in the horizontal pillar 5, and the long hole 3 is a non-through hole.

[0032] In this embodiment, the length of the 14-5# mining house is 80m, the thickness of the horizontal ore pillar 5 is 8.62m, and the processing volume is about 19052.8m 3 . The drilling and charging paramete...

Embodiment 2

[0034] The difference between embodiment 2 and embodiment 1 is that in embodiment 2, when the vertical ore pillar 6 on the opposite side of the vertical ore pillar 6 on one side is also provided with the ore passage 2, two additional a long hole 3.

[0035] Table 1

[0036]

[0037]

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Abstract

The invention discloses a dilapidation method of a horizontal ore pillar after stage room mining method extraction, and belongs to the mining technology field. The dilapidation method of the horizontal ore pillar after the stage room mining method extraction includes the following steps: arranging an extracted ore drift and an extracted ore roadway in vertical ore pillars on two sides of the horizontal ore pillar, arranging a rock drill in the extracted ore roadway in the opposite side of the extracted ore drift, and using the rock drill to drill a slant long hole in the extracted ore roadwayand in the direction towards the horizontal ore pillar; and filling the long hole with explosive, and dilapidating the horizontal ore pillar. The dilapidation method of the horizontal ore pillar afterthe stage room mining method extraction does not need to drill holes in the extracted ore drift, then does not need to clean ore accumulated in the extracted ore drift, does not need to clear brokenrock on a bottom plate in the extracted ore drift, and can perform extraction for the horizontal ore pillar by arranging the slant long hole in the extracted ore roadway in the opposite side of the extracted ore drift; and can substantially reduce the quantity of drilled holes, reduce construction difficulty, reduce the quantity of invalid holes, improve utilization rate of the holes, reduce construction cost and shorten construction time on the premise of meeting explosion treatment requirements of the horizontal ore pillar.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a method for caving horizontal ore pillars after back mining by a stage mine mining method. Background technique [0002] Underground mining usually adopts the large-diameter deep-hole stage mining method. After mining, a large number of goafs (goafs) are formed in the upper and lower stages, and the horizontal ore pillars and vertical ore pillars between the two middle sections are left to support the surrounding rock together. Subsequent needs Continue mining the pillar. For the mining of horizontal pillars, the mining roadways in the vertical pillars on both sides of the horizontal pillars are used as rock drilling roadways, and a row of medium-deep holes are drilled from the rock drilling roadways on both sides to the direction of the horizontal pillars to form left, right and left. The middle and deep holes in the two rows on the right are arranged in a fan shape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22F42D3/04
CPCE21C41/22F42D3/04
Inventor 张福隆
Owner FUJIAN HAIXIA KEHUA FUXING CONSTR ENG CO LTD