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Analytical device and analytical method for simulating coal gas change during coal cutting of coal cutter

An analysis device, a gas change technology, applied in the direction of measuring devices, analysis materials, instruments, etc.

Active Publication Date: 2014-11-05
四川省科建煤炭产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of gas analysis in the existing coal production process, and propose an analysis device and analysis method for simulating the change of coal body gas in the coal cutting process of a coal shearer

Method used

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  • Analytical device and analytical method for simulating coal gas change during coal cutting of coal cutter
  • Analytical device and analytical method for simulating coal gas change during coal cutting of coal cutter
  • Analytical device and analytical method for simulating coal gas change during coal cutting of coal cutter

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Actual downhole: the coal thickness of the working face is 1.2m, and the recovery air volume is 576m 3 / min; when the section size of the working face is S 采小 5.19M 2 , the wind speed is 1.85m / s, when the section size of the working face is S 采大 6.78M 2 , the wind speed is 1.42m / s, (when the coal is mined back, the section of the working face will change, the mining is more, the cross-sectional area is large, the wind speed is small, the mining is small, the cross-sectional area is small, the wind speed is large, and the wind speed is within this range Variety).

[0064] An analysis method for simulating the change of coal body gas in the process of coal cutting by a shearer, which includes the following steps:

[0065] A. Unbroken coal is made into a block coal sample with a volume of 20cm×20cm×10cm;

[0066] B. Put the lumpy coal sample in the crushing chamber 14, and control the air volume at 0.401292-0.52281m by air intake system A 3 / s (that is, the air veloc...

Embodiment 2

[0072] The difference between Embodiment 2 and Embodiment 1 is that the temperature is controlled at 25° C. by the temperature control system C through the heating resistance wire 6 , and the rest are the same as Embodiment 1. The analysis results are as follows:

[0073] Table 2: Results of Gas Composition of Cut Coal Blocks at 25°C

[0074]

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Abstract

The invention discloses an analytical device and analytical method for simulating the coal gas change during coal cutting of a coal cutter. The analytical device is composed of an air intake system, a crushing system, a temperature control system, an air extraction system and an analysis system. The method comprises the steps of: A. making unbroken coal into a lump coal sample with a volume larger than 20cm*20cm*10cm; B. placing the lump coal samples in a crushing chamber, controlling the air quantity by the air intake system, at the same time letting the temperature control system control the temperature at 25-800DEG C through a heating resistance wire, and then starting a motor to drive a pick to cut the coal at a rotation speed of 20-40r / min; and C. extracting the gas in the crushing system every other 20-30s by the air extraction system, and transporting the extracted gas to the analysis system to conduct gas component analysis. With the device and the method provided by the invention, the gas change situation of coal in the production process can be obtained, thereby better guiding the governance of methane and carbon monoxide gases in coal mines.

Description

technical field [0001] The invention relates to an analysis device and analysis method for simulating the change of coal body gas during the coal cutting process of a coal shearer. Background technique [0002] At present, the main coal mining method at home and abroad is comprehensive mechanized coal mining, that is, using shearer picks to break coal. In the process of coal mining, the gas composition of the working face has undergone great changes, among which methane and carbon monoxide gas and other gases have greatly increased. However, it is stipulated in the "Coal Mine Safety Regulations" and "Gas Control Regulations" that: carbon monoxide in the mine air The maximum allowable concentration of methane is 0.0024% (24ppm), and the methane concentration in the mine working face does not exceed 1%. [0003] There are many scholars and methods at home and abroad to study the original methane and carbon monoxide gas components in coal, but most of them are static and isola...

Claims

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Application Information

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IPC IPC(8): G01N33/00
Inventor 蒋志刚伍厚荣王寿全陈曦陈显坤李连云
Owner 四川省科建煤炭产业技术研究院有限公司