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Pressure-sensitive material for monitoring goaf suspension area and preparation method thereof

A technology of pressure sensitivity and goaf, applied in the field of mine safety, can solve the problems of high equipment cost and later maintenance cost, failure of monitoring process, easy to be destroyed, etc., to avoid air leakage in the air, reduce input cost, and monitor process Accurate and effective effect

Active Publication Date: 2021-11-19
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the monitoring line is easily damaged by the crushed stones in the goaf, resulting in the failure of the monitoring process. On the other hand, this method requires a large investment, high equipment costs and post-maintenance costs

Method used

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  • Pressure-sensitive material for monitoring goaf suspension area and preparation method thereof
  • Pressure-sensitive material for monitoring goaf suspension area and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A pressure-sensitive material for monitoring the suspended area of ​​a goaf, comprising a hollow spherical shell and a tracer material perfluoropentanone filled inside the shell; the hollow spherical shell is made of the following weight percentage Silicone resin compounded with silane material and curing agent: 8.3% trimethoxyphenylsilane, 13.9% methyltrichlorosilane, 33.3% methyltriethoxysilane, 44.5% curing agent; The hollow spherical shell ruptures under pressure to release the internal tracer material perfluoropentanone; the curing agent is a mixture of ethyl orthosilicate and silicon dioxide, and ethyl orthosilicate and dioxide The mass ratio of silicon is 1:7.

[0022] The above-mentioned preparation method of the pressure-sensitive material used for monitoring the suspended area of ​​the goaf comprises the following steps:

[0023] S1. Weighing 11.25g of trimethoxyphenylsilane, 18.75g of methyltrichlorosilane and 45g of methyltriethoxysilane, the three silane m...

Embodiment 2

[0029] A pressure-sensitive material for monitoring the suspended area of ​​a goaf, comprising a hollow spherical shell and a tracer material perfluorom-dimethylcyclohexane filled inside the shell; the hollow spherical shell is made of It is a silicone resin compounded by the following weight percentages of silane materials and curing agents: 5.6% of trimethoxyphenylsilane, 8.9% of methyltrichlorosilane, 41.1% of methyltriethoxysilane, 44.4% % curing agent; the hollow spherical shell ruptures under pressure and releases the internal tracer material perfluoromethylene dimethylcyclohexane; the curing agent is tetraethyl orthosilicate and silicon dioxide Mixture, the mass ratio of ethyl orthosilicate to silicon dioxide is 1:5.

[0030] The above-mentioned preparation method of the pressure-sensitive material used for monitoring the suspended area of ​​the goaf comprises the following steps:

[0031] S1. Weighing 7.5g trimethoxyphenylsilane, 12g methyltrichlorosilane and 55.5g me...

Embodiment 3

[0037]A pressure-sensitive material for monitoring the suspended area of ​​a goaf, comprising a hollow spherical shell and a tracer material perfluorodimethylcyclobutane filled inside the shell; the material of the hollow spherical shell is A silicone resin compounded by the following weight percentages of silane materials and curing agents: 4.4% trimethoxyphenylsilane, 11.1% methyltrichlorosilane, 40.0% methyltriethoxysilane, 44.5% A curing agent; the hollow spherical shell ruptures under pressure to release the internal tracer material perfluorodimethylcyclobutane; the curing agent is a mixture of tetraethyl orthosilicate and silicon dioxide, The mass ratio of ethyl orthosilicate to silicon dioxide is 1:9.

[0038] The above-mentioned preparation method of the pressure-sensitive material used for monitoring the suspended area of ​​the goaf comprises the following steps:

[0039] S1, weighing 6g trimethoxyphenylsilane, 15g methyltrichlorosilane and 54g methyltriethoxysilane ...

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Abstract

The invention discloses a pressure-sensitive material for monitoring a goaf suspension area and a preparation method thereof. The material comprises a hollow spherical shell and a tracer material, wherein the shell is filled with the tracer material; the material of the hollow spherical shell is prepared by compounding the following silane materials and a curing agent in percentage by weight: 4.4 to 8.3 percent of trimethoxy phenyl silane, 8.9 to 13.9 percent of methyl trichlorosilane, 33.3 to 41.1 percent of methyl triethoxy silane and 44.4 to 44.5 percent of a curing agent. The preparation method comprises the following steps: preparing an organic silicon resin prepolymer from a silane material and an organic solvent, adding a curing agent, curing to form a hollow spherical shell, filling the shell with a tracer material, and performing curing and hole sealing. The method is simple in preparation process, low in equipment and material cost and small in investment, the suspended area in the goaf can be accurately and stably monitored, specific position information is provided for subsequent and timely air leakage blocking and coal spontaneous combustion prevention, and the long-time suspended air leakage situation in the goaf is avoided.

Description

technical field [0001] The invention relates to a pressure-sensitive material and a preparation method thereof, in particular to a pressure-sensitive material for monitoring the suspended area of ​​a goaf and a preparation method thereof, and belongs to the technical field of mine safety. Background technique [0002] In the process of coal mining, coal spontaneous combustion is one of the main natural disasters that threaten the safety of coal mining. According to statistics, about 80% of the coal seams that have been mined in my country have a high tendency to spontaneous combustion. The spontaneous combustion of coal not only damages and wastes coal resources, but also produces toxic and harmful gases that pose a serious threat to the physical and mental health of personnel. Major and serious accidents such as coal dust explosions seriously threaten the safe production of mines. [0003] Gobs in coal mines refer to the cavities or cavities left after the mining of undergr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K5/07C08K5/02C08K5/5415C08K3/36
CPCC08K5/07C08K5/02C08K5/5415C08K3/36C08L83/04
Inventor 戚绪尧陈良舟张亚博饶宇轩辛海会黄志安魏宏阳
Owner CHINA UNIV OF MINING & TECH
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