Research on the mechanism of coal and gas outburst and the screening of prediction indices
Research on the mechanism of coal and gas outburst and the screening of prediction indices
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DOI：
10.1016/j.proeps.2009.09.029
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发表时间：
2009-09
期刊：
影响因子：
--
通讯作者：
Shiyue Wu;Yong-yi Guo;Yuan-xing Li;Guo-liang Yang;Y. Niu
中科院分区：
文献类型：
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作者：
Shiyue Wu;Yong-yi Guo;Yuan-xing Li;Guo-liang Yang;Y. Niu
根据煤与瓦斯突出机理、实验室和现场实测结果，结合寺河煤矿的实际情况和《煤与瓦斯突出防治规程》的有关规定，分析了突出预测的主要静态指标之间的相关性。利用煤体破坏类型、煤体坚固系数、瓦斯初始扩散速率、瓦斯压力、瓦斯含量、煤层埋深、煤层产状变化、地质构造、岩屑解吸指数K1等多源信息，筛选出寺河煤与瓦斯突出预测的静态敏感性指标体系。可靠性和准确性高。因此，在采用单一指标进行突出预测时，应首选K1。《煤与瓦斯突出防治规程》第34条对同一预测方法的钻孔直径、钻孔深度和试验内容的规定与第38条不同。这将导致在实际应用中的模糊性。研究表明，文章中应作如下修改：预测孔径应由工程钻具确定，湿岩屑和干岩屑的K1值均可作为预测指标。
According to coal and gas outburst mechanisms, lab and field measurement, actual situations of Sihe coal mine and articles in Prevention Regulations of Coal and Gas Outburst, the relevancy among chief static indices of outburst prediction are analyzed. The static sensitivity index system is screened out to predict coal and gas outburst by multi-source information in Sihe, such as destruction type of coal, coal’s consistent coefficient, initial rate of methane diffusion, gas pressure, gas content, depth of coal seams, occurrence change of coal seams, geological structure, cuttings desorption index K1, etc. K1has the characteristics of easy measurement, strong generalization, high reliability and accuracy. So K1should be firstly chosen when a single index is adopted to predict outburst. The provision of article 34 in Prevention Regulations of Coal and Gas Outburst about the drilling holes’ diameter, depth and test contents for the same prediction method are different from article 38. These will lead to ambiguity in practical applications. The research shows that articles should be revised as follows: prediction drilling apertures should be determined by engineer drilling tool, and K1of wet or dry cuttings each can be used as prediction index.