Method and device for quickly determining coal seam gas parameter for underground coal mine

A rapid measurement, coal seam gas technology, applied in the direction of analysis of materials, instruments, etc., can solve the problem that the measurement method cannot accurately measure the parameters of coal seam gas

Active Publication Date: 2017-06-23
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method and device for quickly measuring coal seam gas parameters under

Method used

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  • Method and device for quickly determining coal seam gas parameter for underground coal mine
  • Method and device for quickly determining coal seam gas parameter for underground coal mine
  • Method and device for quickly determining coal seam gas parameter for underground coal mine

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Experimental program
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Effect test

preparation example Construction

[0048] (1) Preparation and establishment of laboratory database

[0049] Take fresh coal samples and seal them and send them to the laboratory to measure the apparent density and porosity of the coal. At the same time, pulverize the coal samples according to the regulations and sieve the coal samples with a particle size of 1-3mm and put them into the coal sample tank, and then carry out 20 The isothermal adsorption experiment was carried out at ℃, and then the isothermal desorption experiment was carried out at 15℃, 20℃ and 25℃ respectively, and the desorption data of multiple groups of coal samples were summarized, and the desorption laws of the three temperatures were obtained respectively, and the temperature correction was carried out. , solve the corresponding relationship between the desorption curve and the gas parameters, and finally establish a database based on the conditions of fresh coal samples at 20°C and a particle size of 1 to 3 mm. range of parameters.

[00...

Embodiment 1

[0074] Embodiment 1: the measuring device is provided with a coal sample tank 1, a coal seam gas parameter rapid measuring instrument 9, and the coal sample tank 1 is connected with the air inlet 3 of the coal seam gas parameter rapid measuring instrument 9 through the air guide pipe 2, and the air inlet 3 Connect with one end of the flowmeter, which is used to collect the desorption data of drilling cuttings; the other end of the flowmeter is connected with the air outlet 4 through a hose, and at the same time connected with the single-chip microcomputer through a wire, and the collected desorption data is transmitted to the single-chip microcomputer and analysis; the single-chip microcomputer is provided with a data storage device for storage of database and desorption data; the display 8 is installed on the upper side of the single-chip microcomputer for real-time observation; the single-chip microcomputer is also connected with an intrinsically safe control circuit to provid...

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Abstract

The invention discloses a method and a device for quickly determining a coal seam gas parameter for an underground coal mine, and belongs to methods and devices for determining coal seam gas parameters. The method comprises: establishing a database about a gas parameter and a desorption curve by utilizing a one-to-one correspondence, determined by a lab, between the coal seam gas parameter and the desorption curve; matching underground field desorption data with the desorption curve in the database to acquire the coal seam gas parameter thereof. A coal seam gas parameter quick determinator of the determination device is provided with a flow meter, a single-chip computer, a display, a data storage device, a lithium battery power supply, and an intrinsic safety control circuit, and is connected with a coal sample tank through a gas guide pipe to determine values of coal seam gas pressure, gas content and drillings gas desorption indexes (K1 and K2). The advantages are as follows. The method can determine multiple coal seam gas parameters simultaneously, the needed time is short, the workload is small, the manufacturing cost is low, the operation is simple, the determination result is high in reliability, a judgment index is provided for outburst coal seam danger evaluation, and the method is of great significance for the development of an outburst prevention technology for a workface.

Description

technical field [0001] The invention relates to a method and a device for measuring coal seam gas parameters, in particular to a method and a device for quickly measuring coal seam gas parameters underground in a coal mine. Background technique [0002] With the increase of mining depth, the gas content and in-situ stress in coal seams increase, and the degree of outburst danger becomes more serious, which has become a restrictive factor affecting coal mine safety production more and more. Coal seam gas pressure is an important index to evaluate the coal seam outburst risk and determine the coal seam gas content, and it ranks in the forefront of the coal seam outburst risk index and importance ranking. At the same time, coal seam gas pressure is also the basic parameter that determines the gas flow dynamics and the potential of gas dynamic phenomena, and has guiding significance in the research and evaluation of gas reserves, gas gushing, gas flow, gas drainage and gas outbu...

Claims

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Application Information

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IPC IPC(8): G01N7/04
CPCG01N7/04
Inventor 王飞王振洋王海亮程远平李伟毋首杰聂雷
Owner CHINA UNIV OF MINING & TECH
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