Handling method for mining quality accident

A kind of accident handling and quality technology, applied in ground mining, mining equipment, underground mining, etc., can solve the problems of failure to reach the upper section, poor blasting effect, high mining loss rate, etc., achieve reasonable matching of blasting parameters, and improve mining recovery The best effect of rate and blasting effect

Inactive Publication Date: 2018-11-20
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Description
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  • Application Information

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Problems solved by technology

A common mining quality accident is that the caving height of this section does not reach the position of the upper section, and the part of the ore rock that has not collapsed forms a shape similar to a floor slab, which cuts off the waste rock covering layer of the upper section and cannot fill the area that has already collapsed; The accident was caused by inadequate design and construction of medium and deep holes, and poor blasting effect.
[0003] After a mining quality accident occurs, the traditional method is to mine ore in the small empty field formed by the accident. In order to prevent the roof of the empty field from collapsing and ensure safe production, most of the collapsed ore is left in the small empty field. Mining a small amount of ore, continuing to carry out blasting and mining in the back row of medium and deep holes, resulting in a mining loss rate of up to 60-70%, and a mining recovery rate of only 30-40%, which not only causes waste of resources but also causes instability in the roof of the empty field , there is a possibility of collapse and fall at any time, which will cause harm to safety production and cannot meet the needs of mine safety production

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  • Handling method for mining quality accident
  • Handling method for mining quality accident
  • Handling method for mining quality accident

Examples

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Embodiment 1

[0027] Such as Figure 1 to Figure 3 A kind of mining quality accident processing method is shown, the first row of medium-deep holes 3, the second row of medium-deep holes 4, and the third row of medium-deep holes 5 are sequentially set on the inside of the top rock formation accident area 2 of the mining roadway 1, and each row The medium-deep holes are arranged in a fan shape to form a fan-shaped medium-deep hole. The face angle of the first row of 3 rows of medium-deep holes is 60°, the face angle of the second row of 4 rows of medium-deep holes is 70°, and the third row of 5 rows of medium-deep holes The angle is 90°, and the fan-shaped middle and deep holes should meet the following requirements: the side hole angle is 50°, the hole depth is 6 meters, the diameter of the middle and deep holes is 60 mm, and the row spacing w of the middle and deep holes in adjacent rows is 0.3 meters. The bottom distance a of the deep holes in the row is 13d, and the density factor is 2. ...

Embodiment 2

[0030] Such as Figure 1 to Figure 3 A kind of mining quality accident treatment method shown, in the top stratum of mining roadway 1, the first row of deep holes 3, the second row of middle and deep holes 4, the third row of middle and deep holes 5 are arranged successively, and the middle and deep holes of each row are in the form of The fan-shaped arrangement forms fan-shaped medium-deep holes. The face angle of the first row of 3 rows of medium-deep holes is 60°, the face angle of the second row of 4 rows of medium-deep holes is 70°, and the face angle of the third row of 5 rows of medium-deep holes is 90°. , the fan-shaped middle and deep holes should meet the following requirements: the side hole angle is 60°, the hole depth is 9 meters, the diameter of the middle and deep holes is 65 mm, the row distance w of the middle and deep holes in adjacent rows is 0.4 meters, and the middle and deep holes in the same row The hole bottom distance a is 19d, and the density factor i...

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Abstract

The invention belongs to the technical field of mining and particularly discloses a handling method for a mining quality accident. The handling method interacts with a blasting device; a caved ore body formed by blasting introduces a top barren rock covering layer at an accident site into a small vacant field, so that normal ore removing conditions are achieved and the quality accident is thoroughly handled. Compared with a traditional method, the ore loss rate is reduced to 6 to 9 percent from 60 to 70 percent, the mining recovery rate is greatly improved to 91 to 94 percent from 30 to 40 percent and the operation safety is ensured.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a method for handling mining quality accidents. Background technique [0002] The segmental caving mining method, the stage height is 50-60 meters, the segmental height is 10-12 meters, and the mining approach distance is 10-11 meters. During the mining process, with the release of caving ore in this section, the waste rock covering layer in the upper section is released accordingly. When the ore drawing is completed, the caving area is full of waste rock covering layer. A common mining quality accident is that the caving height of this section does not reach the position of the upper section, and the part of the ore rock that has not collapsed forms a shape similar to a floor slab, which cuts off the waste rock covering layer of the upper section and cannot fill the area that has already collapsed; The accident was caused by inadequate design and construction of medi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F11/00
CPCE21C41/16E21F11/00
Inventor 王建军李德忠王志远蔡立丰张国勇朱甜高闻宇牟业龙刘亭王林
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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