Improved Prediction Model for Determining the Lost Gas Content of Extreme-soft and Outburst-prone Coal Seam
Xu Dong-fang1, Feng Tao2, Qin Zuo-ya3, Yang Jing3
Identifiers and Pagination:Year: 2014
First Page: 119
Last Page: 124
Publisher Id: TOPEJ-7-119
Article History:Received Date: 16/09/2014
Revision Received Date: 23/12/2014
Acceptance Date: 31/12/2014
Electronic publication date: 31/12/2014
Collection year: 2014
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Few study has been carried out on the desorption rules of extreme-soft and outburst-prone coal in south of China, especially coal from Hunan Province of which the value of “f” is normally less than 0.2. Desorption experiments are conducted on the coal samples from Hongwei and Jiahe Mines in Hunan Province, and the following phenomena can be observed: the calculating mean error by √t method and power function method of Hongwei coal samples are 29.68% and 68.33%, 28.55% and 70.28% of Jiahe , the calculating result by the two methods is always lower. After comparison we find that the √t method is more precise than power function method, so calculation method is improved based on √t method, mean error of gas content determination by the new method in experiment and coal mine are 6.88% and 5.24%, both less than 10%.