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A layer-by-layer extrusion and smooth blasting mining method in underground mines

A technology of smooth blasting and mining method, which is applied in the field of smooth blasting mining and layer-by-layer extrusion in underground mines, which can solve the problems of high construction cost, high safety risk of operators, high block rate, etc., and achieve low filling cost and improved The effect of ore transport efficiency

Active Publication Date: 2019-12-10
周伟永
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional upward layered filling mining method, each shift of workers enters the stope to drill rocks to drop ore. It is difficult to guarantee the local stability of the stope roof, and the rate of large pieces is high. Secondary crushing is required, which poses a greater risk to the safety of the operators. Low efficiency and high construction cost

Method used

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  • A layer-by-layer extrusion and smooth blasting mining method in underground mines
  • A layer-by-layer extrusion and smooth blasting mining method in underground mines
  • A layer-by-layer extrusion and smooth blasting mining method in underground mines

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Embodiment Construction

[0027] See attached picture.

[0028] The ore body is irregular, and the stability of the ore rock is good. A mining method of layer-by-layer extrusion blasting and smooth blasting is adopted. The specific implementation steps are as follows:

[0029] Stope layout

[0030] The ore block is divided into ore chambers and pillars along the direction of the ore body. The middle shaft 7 is arranged on the other side of the footwall along the vein 1, parallel to the ore body along the vein, and the two ends of the stope are piercing veins 2, which are arranged in In the ore pillar, a pedestrian patio 3 is arranged at both ends of the stope, a stope chute 5 is arranged by the ore body footwall, a vibrating ore-drawing machine 11 is installed at the bottom of the chute, and a mining roadway 4 is constructed near the stope chute. A filling well 9 is arranged in the middle of the stope. The length of the stope is 66m, the width is 16.5m in thickness of the ore body, and the height of...

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Abstract

The invention discloses a layer-by-layer extrusion and smooth blasting mining method for an underground mine. The method includes the steps of: arranging a hanging wall air return way and a footwall following-vein transportation way along the ore body trend. The footwall following-vein transportation way is parallel to the ore body trend, and an orepass is disposed on the other side. Transverse drifts perpendicular to the ore body trend are disposed at both ends of an ore block. The length of stope is 40-100m, the width is the ore body thickness 5-20m and the height is 40-60m. The stope miningadopts a bottom-up layer-by-layer extrusion and smooth blasting way. By means of the layer-by-layer extrusion and smooth blasting technology, extrusion blasting is firstly carried out, then stope roof smooth blasting is carried out, through layer-by-layer extrusion, the lump ore rate is small, and the blasting cost is low. Layer-by-layer smooth blasting reduces disturbance to surrounding rock andmaintains the stability of surrounding rock, the stope roof is relatively flat, and workers are safe during construction in the stope. Layer-by-layer upward full tailing filling is low in filling cost.

Description

Technical field: [0001] The invention relates to the technical field of mining in underground mines, and mainly relates to a layer-by-layer extrusion and smooth blasting mining method in underground mines, which is mainly suitable for not thick and irregular ore bodies, and the ore rocks are moderately stable. Background technique: [0002] In mining, the upward layered filling mining method is widely used. This mining method has the characteristics of simple structure, convenient operation, and low dilution and loss rate. In the traditional upward layered filling mining method, each shift of workers enters the stope to drill rocks to drop ore. It is difficult to guarantee the local stability of the stope roof, and the rate of large pieces is high. Secondary crushing is required, which poses a greater risk to the safety of the operators. The efficiency is low and the construction cost is high. Invention content: [0003] The purpose of the present invention is to make up ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/16E21F15/00E21F13/04F42D3/04
CPCE21C41/16E21F13/04E21F15/00F42D3/04
Inventor 周伟永
Owner 周伟永
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