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OALib Journal期刊
ISSN: 2333-9721
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考虑水分含量的煤岩渗透率动态变化特征
Keywords: 水分含量,渗透率模型,反弹压力,恢复压力,动态变化
Abstract:
？为探索考虑水分含量的煤岩渗透率模型描述渗透率动态变化特征的准确性以及渗透率在排采过程中的恢复程度，采用考虑水分含量的渗透率模型、p-m模型和s-d模型，研究了该3种渗透率模型的反弹压力prb值和恢复压力prc值以及渗透率的动态变化过程，研究结果表明：①考虑水分含量的渗透率模型、p-m模型和s-d模型计算的prb值和prc值中，p-m模型计算的值偏小，s-d模型与考虑水分含量的渗透率模型计算的值比较接近；②3种模型中考虑水分含量的渗透率模型预测的渗透率变化率与现场试井测得的渗透率变化率基本一致，说明考虑水分含量的渗透率模型预测值更接近实际值；③当恢复压力prc值小于0时，会出现渗透率降低后在开采过程中无法恢复到初始渗透率的现象。
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