测氡法在小煤窑采空区勘察中的应用研究

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Abstract The small coal pit goaf has the characteristics of long time, mostly private, no information which is available and so on. But deformation and uneven settlement of small coal pit goaf will pose a big threat and danger to railway construction and operation. To identify the production scale and influence scope of goaf rely on survey and drilling with a long cycle, high cost, difficult to ascertain, some geophysical methods has serious interference by human factors. This paper studied how to use radon measurement technology, and give full play to its factors beyond electromagnetic, vehicles and other interference advantages, combined with a small amount of drilling data, for the purpose of the identification of goaf and the solution of small coal goaf survey problem.Research conclusions:Through the application of radon measurement technique in the sample survey of small coal pit goaf known that: (1) The concentration of radon gas in small coal goaf and the resulting crack place significantly increases. (2)The abnormal concentration of radon gas has no direct relations with the length of time. (3) In the small coal mining air radon concentration curve shows a single, unusually large peak high ratio. (4)Radon measurement technique has a good effect to the survey work of small coal pit goaf which has the characteristics of long time, mostly private, no information which is available.

Key words： the small coal pit goaf radon measurement curve characteristic the principle of explain

Received: 10 March 2014

PACS:

U213.1

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	Articles by authors
	ZHANG Ji-zhen
	WANG Yin
	TANG Hai-min
	ZHOU Hai-bin

Cite this article:

ZHANG Ji-zhen,WANG Yin,TANG Hai-min, et al. Research on Application of Radon Measurement in Detection of Small Coal Pit Goaf[J]. 铁道工程, 2014, 31(10): 21-25.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2014/V31/I10/21

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