Method for injecting retarder to coal body

A technology of chemical inhibitor and coal body, which is used in earth-moving drilling, safety devices, mining equipment, etc., can solve the problem that the inhibitor is not successful enough to prevent fire, the inhibitor cannot evenly wet and wrap the coal body, and the inhibitor cannot completely Play the role of inhibition and other problems to achieve the effect of reducing concentration, prolonging the natural ignition period, and enhancing the effect of dust reduction

Inactive Publication Date: 2010-06-02
康怀宇 +1
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  • Abstract
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Problems solved by technology

The fatal shortcoming of this method is that it cannot guarantee that the inhibitor will wrap the coal evenly, and the inhibitor cannot fully exert its inhibitory effect.
In addition, the floating coal in the goaf of the fully mechanized top-coal caving face is relatively thick, and the resistance of the coal body surface cannot prevent the spontaneous combustion and ignition of the floating coal at the lower part. satisfy
The cases of domestic coal mines using inhibitors for fire prevention are not successful, all of which are caused by the inhibitors not being able to evenly wet and wrap the coal body

Method used

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  • Method for injecting retarder to coal body
  • Method for injecting retarder to coal body
  • Method for injecting retarder to coal body

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Embodiment Construction

[0044] The method of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0045] like figure 1 Shown, the inventive method comprises the following steps:

[0046] 1. Drill several boreholes 3 in parallel in the middle of the coal seam 2 of the top-coal caving working face 1 in the coal mine. The diameter of the boreholes 3 is 65-75mm. The depth is 90 meters. In order to facilitate the discharge of drilling cuttings, the borehole 3 has an elevation angle of 1 to 2°; in order to prevent the coal walls at both ends of the fully mechanized caving face 1, the two ends of the working face 1 and the adjacent nearest borehole 3 The distance 5 is not less than 10m.

[0047] 2. Use an emulsion pump to inject inhibitor solution into each coal seam borehole 3;

[0048] The amount of inhibitor solution injected into each borehole 3 is determined according to the following formula:

[0049] Q=L·B·M·γ·ΔW·K (1)

[0050]...

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Abstract

This invention relates to a method for injecting stopping agent to coal including: 1, drilling several holes parallel at the middle part of a coal seam of a coal mining working face, 2, injecting stopping agent solution into the drill holes with an emulsion liquid pump, 3, sealing the holes automatically with a high pressure rubber quick sealing device, and the concentration of the stopping agentis 4-20% and selected from water glass, Ca(OH)2, NaOH, NaHCO3, CACl2 or MgCl2, which can prolong the natural flaming period of coal and eliminates sulfureted hydrogen in coal by injecting stopping agent solution into high sulfur coal.

Description

technical field [0001] The invention relates to a method for preventing spontaneous combustion of coal during coal mining, in particular to a method for injecting inhibitors into coal bodies. Background technique [0002] Coal has a high chemical activity due to its large surface area, and it is a substance that can generate heat through oxidation under normal temperature and pressure to cause self-combustion. In the process of coal mining, inhibitors are generally used in coal mines at home and abroad to prevent spontaneous combustion of coal. The method is to spray high-concentration (20%) inhibitors on the coal left in the goaf. The fatal shortcoming of this method is that it cannot guarantee that the inhibitor will wrap the coal body uniformly, and the inhibitor cannot fully exert its inhibitory effect. In addition, the floating coal in the goaf of the fully mechanized top-coal caving face is relatively thick, and the resistance on the surface of the coal body cannot pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/08
Inventor 康怀宇
Owner 康怀宇
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