考虑裂隙迂曲度与滑脱效应的瓦斯多场开采评估预测Assessment and Prediction for Multi-field Gas Extraction Considering Conditions of Fracture Tortuosity and Slippage Effect
常博,李伟,刘彦青,赵尤信,朱澍成,李瑞卿
摘要(Abstract)：
煤层裂隙作为瓦斯运移的主要通道，其变化受地应力和瓦斯渗流等因素的影响，进而直接影响到瓦斯的抽采效率。本研究基于裂隙网络幂律分布特性，提出了一种适用于多场耦合条件下的煤层瓦斯开采流-固耦合模型。该模型依据多孔介质强度理论创新性地引入了裂隙幂律指数、裂隙长度最值比和最大裂隙长度来定量描述煤岩裂隙结构。通过有限元分析得出以下主要结论：将瓦斯渗流模拟结果与现场数据进行对比，使得模型的准确性得到了验证；滑脱效应和裂隙迂曲度对渗透率有重要影响；裂隙幂律指数、裂隙长度最值比和最大裂隙长度能够从不同角度对裂隙行为进行量化分析，最大裂隙长度对裂隙渗透率的影响最为显著。
关键词(KeyWords)： 裂隙迂曲度;滑脱效应;多场耦合;瓦斯开采
基金项目(Foundation): 煤炭科学技术研究院重点项目天地科技创新创业资金专项（2024-TD-ZD011-01）
作者(Author): 常博,李伟,刘彦青,赵尤信,朱澍成,李瑞卿
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