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Combined mining medium-length hole drilling and blasting method

A combined, deep-hole technology, which is applied in blasting and other directions, can solve the problems that are not conducive to improving the matching relationship between blasting body and emitted body, not conducive to optimizing and adjusting rock drilling and blasting parameters, and high mining loss rate in mines, so as to improve mine loss and poverty. The effect of improving the index, reducing the mixing rate of waste rock, and improving the recovery rate of mining

Pending Publication Date: 2022-07-29
海南矿业股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the diameters of each row of blastholes are the same, it is not conducive to optimizing and adjusting rock drilling blasting parameters, and is not conducive to improving the matching relationship between the blasting body and the ejected body (when blasting one row at a time, the blasting body is too small; when blasting two rows at a time , the blasting body is too large), which leads to high mining loss rate and high waste rock mixing rate

Method used

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  • Combined mining medium-length hole drilling and blasting method
  • Combined mining medium-length hole drilling and blasting method

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Embodiment 1

[0017] The northern ore body of Meishan Iron Mine is a branch of the main ore body. The ore-seeing elevation of the ore body is -89m. The mining method of slope development and sub-pillar-free subsection caving is adopted. The stope structure parameters of the test block at the end of the ore body are as follows: 16m×15m, the access section is 4.5m×3.8m, there are two kinds of rock drilling and blasting parameters for deep hole 3 in mining, among which: the diameter of the blast hole of N6# and N7# mining access 5 is φ78mm, the row spacing is 2.2m, The hole bottom distance is 2.0~2.2m, the side hole angle is 55°, the diameter of the blast hole of N8# and N9# mining access 5 is φ72mm, the row spacing is 2.0m, the hole bottom distance is 2.2~2.6m, and the side hole angle is 55 °. The CTC-141 pneumatic rock drilling rig and YG90 rock drill are used for the mining medium and deep hole 3 operation, and the BQF-100 type charging device is used for the mining medium and deep hole 3 c...

Embodiment 2

[0020] Shilu Iron Mine is a large-scale mine that turns from open-pit to underground. It adopts the joint development of shafts and slopes, and the mining method of sub-section caving without bottom pillars. The rock drilling parameters of 3 deep hole in 60m staged mining are: the diameter of the blast hole is φ87mm, the row spacing is 2.2m, the hole bottom distance is 3.2-3.4m, the side hole angle is 50°, the height of the rotation center is 1850mm, and each row is 8 a gun hole. The SimbaH1354 full hydraulic rock drilling rig and the cop1838 rock drill were used for mining medium and deep hole 3 operations, and the BQF-100 type charging device was used for mining medium and deep hole 3 charging operations.

[0021] According to the present invention, in the design of the deep holes 3 in mining, several groups of deep holes 3 in mining are arranged in the same mining approach 5 according to the requirements of rock blastability, ore collapsing step distance, etc. The interval...

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Abstract

The invention discloses a combined type mining medium-length hole drilling and blasting method, and relates to the technical field of underground mining, after mining medium-length holes are constructed in a subsection plane stoping drift, charge blasting is carried out, the mining medium-length holes are integrally arranged in a fan-shaped or parallel manner in a grouping manner, and two rows of blast holes with different diameters are alternately formed in each group of mining medium-length holes; according to different arrangement forms, charging blasting of one group of blast holes is carried out every time, the large-diameter blast holes close to the muck pile are firstly detonated, and the small-diameter blast holes far away from the muck pile are then detonated.

Description

technical field [0001] The invention relates to the technical field of underground mining, in particular to a method for deep hole rock drilling and blasting in combined mining. Background technique [0002] The underground mining methods of metal deposits are mainly divided into three categories: open field mining method, caving mining method, and filling mining method. Rock drilling and blasting is the main method for mining ore, among which large-scale mines use medium and deep hole rock drilling and blasting. [0003] Take the sub-column caving method without bottom column as an example to illustrate. The sub-pillar-free caving method is a mining method with simple structure, convenient management, safety and efficiency, and is widely used in underground mines at home and abroad. At present, this mining method is developing in the direction of large structural parameters and large mining equipment, and high-section and large-spacing stope structural parameters have app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 范庆霞何青松
Owner 海南矿业股份有限公司