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Coal particle gas emission amount prediction system and method based on real gas state

A technology of real gas and gas content, applied in the direction of prediction, instrumentation, data processing applications, etc., to achieve the effect of improving the matching degree

Active Publication Date: 2021-11-16
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there are obviously problems in using the ideal gas state equation for gas under high pressure and normal temperature conditions.

Method used

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  • Coal particle gas emission amount prediction system and method based on real gas state
  • Coal particle gas emission amount prediction system and method based on real gas state
  • Coal particle gas emission amount prediction system and method based on real gas state

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Embodiment Construction

[0082] The present application will be described in detail below with reference to the accompanying drawings and embodiments. Each example is provided by way of explanation of the application, not limitation of the application. In fact, those skilled in the art will recognize that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Accordingly, it is intended that the present application cover such modifications and variations as come within the scope of the appended claims and their equivalents.

[0083] exemplary method

[0084] During the mining process of coalbed methane, the adsorbed gas in the coal matrix / coal particles is continuously desorbed and transformed into free gas, and then diffuses and flows into the fractures, and finally seeps into the...

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Abstract

The invention belongs to the technical field of testing or analyzing materials by means of measuring chemical or physical properties of materials, and provides a coal particle gas emission amount prediction system and method based on a real gas state, and the method comprises the following steps: correcting an ideal gas state equation by a compression factor to obtain a real free gas state equation; taking the free gas density as an independent variable, correcting a conventional Langmuir monomolecular layer adsorption isothermal equation taking the pressure as an independent variable, and calculating the gas content in an adsorption state; combining the gas content with the free-state gas content to obtain a simplified Langmuir equation of the coal particle total gas content; differentiating the simplified equation to obtain a desorption and diffusion model driven by the coal particle free state gas density gradient; and based on a finite difference numerical method and a Gaussian-Seidel iteration method, solving the desorption and diffusion model driven by the coal particle state gas density gradient to obtain a prediction curve of the accumulated gas desorption amount of the coal particles so as to predict the gas diffusion amount of the coal particles.

Description

technical field [0001] This application relates to the technical field of testing or analyzing materials by means of measuring their chemical or physical properties, in particular to a coal particle gas emission prediction system and method based on real gas states. Background technique [0002] In the process of coal mining, gas disaster is a huge disaster, which seriously threatens the safe production of coal mines. At the same time, the gas in the coal seam can be extracted and utilized as a coalbed methane resource, which can reduce the risk of gas disasters and make reasonable use of unconventional clean resources. As we all know, coal seam gas content is an indispensable basic parameter for the evaluation of coal mine gas hazard degree, gas disaster control and coal seam gas resource exploration and development in China. Gas content testing methods include direct method and indirect method. [0003] When the gas content of the coal seam is directly measured by sampli...

Claims

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Application Information

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IPC IPC(8): G01N7/14G16C10/00G16C20/10G06Q10/04G06Q50/02
CPCG01N7/14G16C10/00G16C20/10G06Q10/04G06Q50/02
Inventor 徐浩刘伟秦跃平张凤杰毋凡褚翔宇闫林晓郭铭彦韩东阳赵政舵刘晓薇
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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