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Method for detecting coal spontaneous combustion fire source position by polonium-210 method

A technology of po-210-a and coal spontaneous combustion, applied in the field of radiochemical analysis, can solve problems that have not been applied, and achieve high sensitivity, scientific and efficient prevention and control effects

Pending Publication Date: 2020-05-12
CHINA INST FOR RADIATION PROTECTION
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Problems solved by technology

[0005] Utilizing polonium-210 abnormal reflection, our country has used the polonium-210 method to detect hidden faults in coal mines (Fangezhuang Mine Eastern Boundary Fault, Kailuan Mining Bureau), hidden collapse columns (1266 working face and Xishan Mine, Guoerzhuang Mine, Handan Bureau) Diagnosis of the 18217 working face of Juximing Mine), Laoyao goaf (the Laoyao goaf of the second pit of Guoerzhuang Mine, Handan Bureau), and the development of water-containing fractures on the coal seam floor (Fangezhuang Mine working face), the results show that Its geological effect is good and its economic benefits are obvious, but polonium-210 method has not been applied in the detection of coal spontaneous combustion fire source position

Method used

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  • Method for detecting coal spontaneous combustion fire source position by polonium-210 method
  • Method for detecting coal spontaneous combustion fire source position by polonium-210 method
  • Method for detecting coal spontaneous combustion fire source position by polonium-210 method

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] In the demarcated detection range, the measuring point spacing is 10*10m and the shape is a square grid. During the measurement process, the measuring points are increased or decreased according to the actual measurement situation. Each point is numbered in advance to determine the relative position. The GPS locator is used on site to find and arrange measuring points. Dig a pit about 30cm wide and 40cm deep at each numbered measuring point, and collect about 20g of soil in a ziplock bag. Bring the collected solid samples back to the laboratory for indoor analysis and testing.

[0026] Put 0.5g soil sample in a 100mL beaker, add 30mBq Po-209 standard source, soak it with 20ml 6mol / L HCl on the heating plate for about 1h, collect the filtrate after centrifugation, then soak it once with 10mL6mol / L HCl, centrifuge Separate and...

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Abstract

The invention discloses a method for detecting the position of a coal spontaneous combustion fire source through a polonium-210 method. The method comprises the steps of arrangement of detection points, sampling, treatment of a soil sample, polonium-210 analysis, data value analysis and the like. The method provided by the invention is not easily interfered by factors such as interference seasons,weather, sunlight and the like, is obvious in abnormal reaction, has relatively high sensitivity, and has potential application value in the field of accurate detection of the coal spontaneous combustion fire source position.

Description

technical field [0001] The invention relates to the technical field of radiochemical analysis, in particular to a method for detecting the position of a coal spontaneous combustion fire source by using the polonium-210 method. Background technique [0002] The coal industry is an important basic industry related to the lifeline of the national economy, and has a long-term, stable and irreplaceable basic position in the national economy. 56% of the mines in my country mine combustible coal seams. According to data, more than 70% of the mines in my country have spontaneous combustion fire areas or areas with spontaneous combustion fire hazards. Fires caused by coal spontaneous combustion account for more than 90% of the total number of mine fires. Coal mine gas and coal dust explosions caused by natural fires occur from time to time. At the same time, the harmful gases released by coal spontaneous combustion will seriously affect the regional ecological environment and direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V5/00
CPCG01V5/00
Inventor 宋丽娟王俊峰戴雄新
Owner CHINA INST FOR RADIATION PROTECTION
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