文献类型：期刊文献

英文题名：Determination of the sensitivity index and its critical value for outburst risk prediction: A case study in Fuxiang mine, China

作者：Wang, Fakai Liang, Yunpei Sun, Zhongguang Li, Lei Li, Xuelong

第一作者：王法凯

通信作者：Li, XL[1]

机构：[1]Guizhou Inst Technol, Coll Min Engn, Guiyang, Peoples R China;[2]Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Shandong, Peoples R China

第一机构：贵州理工学院矿业工程学院

通信机构：corresponding author), Shandong Univ Sci & Technol, Coll Energy & Min Engn, Qingdao 266590, Shandong, Peoples R China.

年份：2020

卷号：38

期号：9-10

起止页码：502-527

外文期刊名：ADSORPTION SCIENCE & TECHNOLOGY

收录：;EI(收录号：20204909587288);Scopus(收录号：2-s2.0-85097146042);WOS:【SCI-EXPANDED(收录号:WOS:000583461400001)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work is financially supported by the National Science and Technology Major Project of China (Grant No. 2016ZX0504004), the State Key Research Development Program of China (Grant No. 2016YFC0801404 and 2016YFC0801402), the National Natural Science Foundation of China (51674050), the mechanism of coal bed gas desorption and induced dynamic disasters in Guizhou Karst area (KY[2015]353) and the experimental study on coal bed adsorption capacity and improvement of gas recovery rate (LH[2015]7107), which are gratefully acknowledged.

语种：英文

外文关键词：Coal and gas outburst; sensitivity index; desorption index of drill cuttings; fuzzy clustering method

摘要：Gas occurrence in coal seams shows zonation, and the outburst risk prediction index is significantly affected by coal seam gas. For different coal mine, the sensitivity of prediction index of outburst risk is inconsistent, and the different area of the same coal mine can present different sensitivities to the same index. In this study, we measured the industrial analysis of coals and determined the degree of outburst risk of each coal seam using coal samples with the particle size of 1 similar to 3 mm. The relationships between the equilibrium gas pressure and gas desorption index of drill cuttings, between the desorption index of drill cuttings and the adsorption pressure, and between the critical values of the indexes of drill cuttings were also analyzed using the fuzzy clustering method. Based on the analysis of the particle size distribution of coal samples, the influence of grain size on the critical value of the drill cuttings desorption index was studied. The results showed that the critical values of the desorption index of drill cuttings were different under different adsorption equilibrium gas pressures, and those critical values increased with increasing adsorption equilibrium gas pressure. The desorption index of drill cuttings and adsorption equilibrium gas pressure had a linear relationship, and the higher the degree of outburst risk was, the greater the slope of the fitting function and the smaller the intercept; under the same gas pressure of adsorption equilibrium, there was a linear relationship between Delta h(2) and K-1, and the higher the outburst risk of coal seam was, the smaller the slope of the fitting function and the greater the intercept. The drill cuttings desorption index Delta h(2) was more sensitive than the index K-1. Under the same test pressure, the smaller the particle size of the coal samples was, the greater the value of desorption index of drill cuttings and the higher the outburst risk of coal seam. The research results have significant theoretical importance and practical value for the prediction and prevention of coal and gas outbursts in coal mines with similar occurrence conditions of coal seams.