Gas constant pressure desorption simulation test method and device for coal containing gas in overpressure environment

A simulation test, gas coal technology, applied in the direction of measuring devices, fuel oil testing, instruments, etc.

Active Publication Date: 2016-09-28
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on the gas desorption characteristics and laws of coal under overpressure environment, which is an urgent research problem to be solved.

Method used

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  • Gas constant pressure desorption simulation test method and device for coal containing gas in overpressure environment

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Embodiment Construction

[0020] Such as figure 1 As shown, it is an overpressure environment gas-containing coal gas constant pressure desorption simulation test method and device of the present invention. Before using the device, it is necessary to detect the airtightness of the overpressure environment gas-containing coal gas constant pressure desorption simulation test device and close all valve;

[0021] Put the dried coal sample in the coal sample tank 1, adjust the temperature of the super thermostat to 30°C and keep it warm until the temperature in the coal sample tank is constant, turn on the vacuum pump 11, valve 12 and valve 29, and vacuum the coal sample tank 17 Degassing, when the composite vacuum gauge 27 shows that the pressure drops below 10Pa, close the valves 12, 29 and the vacuum pump 11, and complete the degassing treatment of the coal sample tank and the connected pipeline; Charge methane in 21, close valve 23 and record pressure gauge 22 pressure P 0 (i.e. reference tank 21 pres...

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Abstract

The invention belongs to the technical field of coal mine safety, and relates to a gas constant pressure desorption simulation test method and device for coal containing gas in an overpressure environment. The gas constant pressure desorption simulation test device for the coal containing the gas in the overpressure environment comprises a coal sample tank located in an ultra thermostat, the coal sample tank is connected with a degassing unit, a methane charging unit and a constant pressure desorption unit, coal samples are put in the coal sample tank, adsorption equilibrium is achieved through degassing and methane charging, constant-temperature and constant-pressure desorption is conducted under the action of the ultra thermostat and the constant pressure desorption unit, and data is collected according to the gas constant pressure desorption simulation test method for the coal containing the gas in the overpressure environment. According to the gas constant pressure desorption simulation test method and device for the coal containing the gas in the overpressure environment, overpressure desorption of underground gas can be accurately simulated, a gas desorption mechanism is well recognized in the coal bed coring process and the gas extraction process, research techniques and technical ways are provided for improving reliability of calculation of the leaked gas quantity in the coal core in the coring process through a geological exploration desorption method and prediction of a gas extraction capacity of pre-extraction gas drilling, and the dangerous degree prediction of mine gas and pertinence of gas control are improved.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and relates to a constant-pressure desorption simulation test method and device for gas-containing coal gas in an overpressure environment. Background technique [0002] my country is the country with the largest coal output in the world, and it is also one of the countries with the most serious coal mine gas problem in the world. In the prevention and control of gas disasters, the gas content of coal seams is the basis for calculating gas reserves and gas emission, and it is also one of the important parameters for predicting the risk of coal and gas outburst. The accuracy of gas content measurement not only restricts the prediction of mine gas hazard degree Reliability, and affect the effectiveness and economy of gas prevention and control measures based on the prediction of gas hazard level, and may even endanger mine safety production. [0003] Coal seam gas content measurement meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22
CPCG01N33/222
Inventor 王兆丰顾熠凡陈金生柯巍马向攀董家昕陈滔岳基伟樊亚庆王俏
Owner HENAN POLYTECHNIC UNIV
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