摘要
为探讨钻孔煤屑-瓦斯-水耦合的解吸规律,采用压风排渣取样测定煤屑解吸瓦斯量,方法简单快速,减少了瓦斯损失量。钻孔煤屑解吸瓦斯规律在120 min内符合对数方程。对单个煤样和多个煤样瓦斯含量测定结果进行误差分析与不确定度评定。结果表明:钻孔煤样的瓦斯含量测定相对误差仅为1.27%;统计数据为基础的煤层瓦斯含量测定的相对误差仅为1.34%,扩展相对不确定度为2.33%,符合工程实践要求。该研究为煤层瓦斯含量测定结果的可靠性提供了理论依据。
This paper introduces desorption law behind drilling coal-gas-moisture coupling.The determination of drillings desorption gas volume, using pressure air slagging method is a simple and rapid method reducing the amount of gas loss.The coupling trend of the coal-gas-moisture complies with the logarithmic equation within 120 minutes.The study involves error analysis and uncertainty evaluation of single coal sample and plurality.The results demonstrate that the relative error of gas content of coal sample is only 1.27％;the relative error of gas content of coal sample based on statistical data is only 1.34％;and the relative expanded uncertainty of the measuring error of the total gas desorption amount is 2.33％, adequate for the requirements of engineering practice.The research could provide a theoretical basis for the reliability of coal gas content determination.
出处
《黑龙江科技大学学报》
CAS
2017年第5期462-467,共6页
Journal of Heilongjiang University of Science And Technology
基金
国家自然科学基金项目(U1361102)
