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A Method of Reversing Coal Temperature in Gob Area Using Index Gas Concentration

A technology for gas concentration and goaf, which is used in instrumentation, chemical machine learning, measurement devices, etc.

Active Publication Date: 2021-12-28
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, based on statistics and other content, there are few literature reports on the change of gas concentration in gobs and the functional relationship between index gas and coal temperature.

Method used

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  • A Method of Reversing Coal Temperature in Gob Area Using Index Gas Concentration
  • A Method of Reversing Coal Temperature in Gob Area Using Index Gas Concentration
  • A Method of Reversing Coal Temperature in Gob Area Using Index Gas Concentration

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] 1. Coal low-temperature adiabatic oxidation experiment

[0033] The coal samples come from 88 groups of coal samples from 88 mines in my country. Refer to the National Safety Production Testing Center of China University of Mining and Technology, and conduct experiments on the detailed steps of coal low-temperature index gas testing: (1) The coal sample is crushed, and the particle size of 50g is 40~ 80 mesh particles; (2) put the coal sample in the coal sample tank 1 in the program temperature control box 2, connect the inlet and outlet gas paths and the temperature probe, and check the air tightness. The air used is 50ml / min dry Air; (3) When the temperature in the coal sample tank 1 reaches the specified test temperature, take a gas sample at a constant temperature for 5 minutes, and use the chromatographic analyzer 4 to analy...

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Abstract

The invention discloses a method for inverting the coal temperature in a goaf by using the index gas concentration. 2 h 4 and C 2 h 2 Concentration data, and then use the Logistic model to fit CO, C 2 h 4 The relationship between temperature and temperature, and then determine the four parameters A1, A2, x0, p of the Logistic model based on statistics, and substitute them into the constitutive equation of the Logistic model to obtain CO, C 2 h 4 The mathematical model of concentration and coal temperature, while C 2 h 2 The initial temperature range of the gas is 191°C to 317°C. Once the gas is detected, it means that the coal temperature exceeds 191°C, and it is directly determined that the coal has been burned. The present invention provides index gas CO, C 2 h 4 Substituting the on-site gas concentration into the mathematical relationship with the coal temperature can inversely calculate the coal temperature and provide data support for the early warning of coal spontaneous combustion.

Description

technical field [0001] The invention relates to the technical field of coal spontaneous combustion prevention, in particular to a method for inverting the coal temperature in a goaf by using the index gas concentration. Background technique [0002] China is a major coal-producing country, and coal accounts for more than 70% of energy consumption. Combustion is a natural attribute of coal. Controllable combustion can provide energy for development. Uncontrollable coal spontaneous combustion is a major disaster for coal mining safety. It not only releases toxic and harmful gases, pollutes the environment, but also causes coal dust-gas explosions. Monitoring and monitoring is the key to the prevention and control of coal spontaneous combustion, and the index gas is the most widely used and most important characteristic parameter of coal spontaneous combustion early warning, which covers most of the information of coal spontaneous combustion, so the characteristics of the key g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16C20/70G16C20/10G01N30/00
CPCG16C20/70G16C20/10G01N30/00
Inventor 任万兴郭庆贾慧霖石晶泰刘鑫杨样
Owner CHINA UNIV OF MINING & TECH