Method for processing large-scale underground goaf

A goaf, large-scale technology, applied in mining equipment, mining equipment, earth-moving drilling, etc., can solve problems such as labor and time-consuming, hidden safety hazards left by shovel loading in goaf, and impact on blasting effect.

Inactive Publication Date: 2014-10-01
TAIYUAN IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The traditional goaf survey technology can only give two-dimensional results, which requires experience to analyze and identify, and is costly, dangerous, labor-intensive and time-consuming. In many cases, it is not practical or feasible; Handling without understanding the cavity shape of the gob will leave hidden dangers to safe production;
[0004] 2. The thickness of the security layer on the roof of the goaf is mostly based on the personal experience of the goaf treatment technicians,

Method used

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  • Method for processing large-scale underground goaf
  • Method for processing large-scale underground goaf
  • Method for processing large-scale underground goaf

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] Embodiment: take 1740-10-empty 7 as an example.

[0033] 1. Understand the shape of 1740-10-Kong 7 through the 3D laser scanning report.

[0034] From the 3D modeling composite diagram, it can be seen that the goaf is a gourd-shaped multi-layer goaf, and the parameters of the goaf are shown in Table 1:

[0035] Table 1 Goaf parameters

[0036]

[0037] 2. Determine the reasonable security layer thickness and the timing of empty area treatment according to the ore rock structure.

[0038] According to the "Summary Report on the Research on the Stability of Open-pit Mining in the Upper Goaf of Yuanjia Village Iron Mine of Taiyuan Iron and Steel Co., Ltd. and the Research on Goaf Treatment Technology" provided by Changsha Mining Research Institute, hematite is mainly hematite, followed by magnetite. The formula for calculating the thickness of the security layer :

[0039] h=0.683b-0.944

[0040] In the formula, h is the thickness of the security layer, m; b is the ...

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PUM

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Abstract

The invention provides a method for processing a large-scale underground goaf. The method comprises the following steps that: 1, an ultra-deep hole is drilled in a discovered goaf top plate, and the form of a goaf is known in detail through laser three-dimensional scanning; 2, through on-the-spot engineering geological investigation in a mining district and the ore rock mechanical parameter tests, the stability of various kinds of rock bodies is studied, and the safety technical parameters of an open pit mine side slope safety layer under different goaf distribution conditions and rock layer conditions are determined; and 3, for the thicker top plate, layered one-step processing is adopted, and the lower part layer collapses earlier than the upper part layer. Fifteen goafs are processed from the application to the Yuanjia village iron mine of the Tisco (Group) Lan County Mining Company, the processing effect is good, and the potential safety hazards are eliminated. The method has greater guidance significance on the open pit metal mine goaf processing, particularly the goaf processing with the thicker top plate, and the method is worthy of being popularized and applied.

Description

technical field [0001] The invention relates to a method for processing a goaf with a thicker roof in a metal open-pit mine, in particular to a method for filling a goaf with a caving roof by deep hole blasting of open steps. Background technique [0002] At present, most metal open-pit mines in China use the deep hole blasting caving method to deal with the goaf. The purpose of dealing with gobs. The deficiencies are: [0003] 1. The traditional goaf survey technology can only give two-dimensional results, which requires experience to analyze and identify, and is costly, dangerous, labor-intensive and time-consuming. In many cases, it is not practical or feasible; Handling without understanding the cavity shape of the gob will leave hidden dangers to safe production; [0004] 2. The thickness of the security layer on the roof of the goaf is mostly based on the personal experience of the goaf treatment technicians, and there is no security layer security thickness based o...

Claims

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Application Information

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IPC IPC(8): E21F17/00
Inventor 米子军白俊臧龙贾传鹏张士磊冯文青韩良德杨兆林
Owner TAIYUAN IRON & STEEL GROUP
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