New Technology of Directly Measuring Gas Content of Stress-Releasing and Sealed Coal Core
There are some problems about the technology of directly measuring gas content. These problems mainly include: the quantity of gas loss is bigger, and compensating computation is indeterminacy, and mensuration accuracy is lower. Aimed at these problems, the direct measurement gas content new technology was brought forward, and after the coal core was fetched, it will be stress-releasing and sealed. It may reduce the quantity of gas loss compensating computation, and it can drill the coal core by the tailor-made sampling implement, and it may collect the emission gas from coal core by making use of the vacuum stress-releasing chamber in the progress of boring. After the coal core was fetched, the sealing fluid that was in the sampling implement was squeezed by some outside force, and the jaws of coal core sampling implement was sealed, and it may reduce the gas loss in the process of fetching the coal core. After the coal core was taken out from the bore, the aiguille was unloaded, and the sealing lid was set. The gas desorption quantity of coal core was mensurated by the valve in the vacuum distressing chamber, and the gas loss quantity that coal core was transferred from the sampling implement to the coal sample jar was reduced. The locale contrast trial shows: the summation of coal core desorption quantity and remanet quantity mensurated by this technology is 16% and 9% higher than those of traditional drilling cuttings method and common coal core method. Therefore, the technology may be used to mensurate coal seam gas content, and its reliability and accuracy are higher.
CHEN Xue-xi ZHOU Shi-ning QI Li-ming
School of Safety Engineering, North China Institute of Science and Technology, Beijing, China School of Safety Engineering, China University of Mining and Technology, Xuzhou, China
国际会议
International Mining Forum 2010(2010年国际采矿论坛 IMF 2010)
合肥
英文
38-42
2010-09-20（万方平台首次上网日期，不代表论文的发表时间）