深埋煤层群上被保护层卸压瓦斯精准溯源量化模型与方法

doi:10. 11799/ ce202506019

摘要/Abstract

摘要：

为解决突出深埋煤层群采用保护层开采时上被保护层卸压瓦斯分布规律难以精准确定的问题，基于碳、氢同位素质量守恒原理，构建三端混源瓦斯精确量化溯源模型。通过采集丁5-6、戊8、戊9-10煤层母本瓦斯气样及距开采层不同高度的混合瓦斯气样，开展碳、氢同位素测试分析。研究结果表明：回采工作面上隅角埋管抽采的混合瓦斯中，丁5-6、戊8、戊9-10煤层瓦斯占比分别为16%、78%、6%；在戊9-10煤层顶板8倍、10倍、12倍、14倍采高处，丁5-6煤层卸压瓦斯占比依次为26%、31%、37%、45%，戊8煤层卸压瓦斯占比则分别为72%、66%、61%、53%。该研究成果实现了开采空间内被保护层卸压瓦斯分布的量化分析，不仅可为保护层回采工作面邻近层卸压瓦斯的精准抽采提供指导，还能为评估被保护层的卸压保护效果提供重要参考依据。

关键词:

保护层开采 , 碳氢同位素 , 三端溯源模型 , 卸压瓦斯 , 瓦斯抽采

中图分类号:

TD712

卫德俊, 陈学习, 刘照辉, 等.

深埋煤层群上被保护层卸压瓦斯精准溯源量化模型与方法 [J]. 煤炭工程, 2025, 57(6): 150-157.

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