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邻近煤层受采动影响瓦斯排放率数值模拟研究
供稿: 刘高峰;王怀玺;宋志敏 时间: 2018-11-19 次数:

作者:刘高峰王怀玺;宋志敏

作者单位 :河南理工大学资源环境学院河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地);中原经济区煤层(页岩)气河南省协同创新中心;河南工程学院资源与环境工程系

摘要:邻近煤层受采动影响瓦斯排放率与层间距的数值关系尚不明确,在预测和确定瓦斯排放率时,工作量大且精度难于保证。针对上述问题,根据邻近层瓦斯排放率与层间距的关系曲线,进行栅格化处理,得到了邻近煤层瓦斯排放率与层间距之间对应的原始数据。根据原始数据,对邻近煤层瓦斯排放率进行数值模拟,分别建立了上邻近层、缓倾斜煤层下邻近层和倾斜、急倾斜煤层下邻近层瓦斯排放率数学模型,并且对数学模型进行了误差分析和精度考察。研究表明,建立的邻近层瓦斯排放率预测数学模型精度高,可以为邻近层瓦斯涌出量预测、突出煤层开采保护层的条件选择和开采保护层的保护效果检验工程应用方面提供便利。

基金:国家自然科学基金资助项目(41302126);河南省基础与前沿技术研究计划项目(132300413204);河南省瓦斯地质与瓦斯治理重点实验室(省部共建国家重点实验室培育基地)基金资助项目(WS2012B08);

关键词:邻近层;瓦斯排放率;数值模拟;

DOI:10.16186/j.cnki.1673-9787.2015.04.001

分类号:TD712.61

Abstract:As long as the numerical relationship between the gas emission rate of adjacent coal seams owing to coal mining and layer spacing is not clear,it is workload and difficult to ensure accuracy in predicting and identifying gas emission rate. In response to these problems,the original data had been obtained by rastering the curve of the gas emission rate of adjacent coal seams and layer spacing. According to the original data,the mathematical model for the gas emission rate of adjacent coal seams was established by numerical simulation,and the error analysis and precision inspection on the mathematical model were completed. The studies show that the mathematical model for the gas emission rate of adjacent coal seams has high precision and it can predict the gas emission quantity in the adjacent layer,and select the conditions for the protection layer of the coal seam,and provide convenience for protection effect test to facilitate the engineering application.

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