ty -jour au -Zhang，hongwei au -wan，Zhijun au -feng，zijun au -wu，jinwen py -2018 da -2018/2018/12/23 ti-剪切诱导的砂岩裂缝SP -2416481 vl -2018 ab -2018 ab -2018 ab -2018 ab -2018 ab -2018 ab- 在地下煤矿中，剪切诱导的区域流体流量是导致缺陷到工作面的水的主要因素。沿液压压裂期间沿着先前裂缝的剪切滑动往往会被激活，并且这种运动可以增强或降低液压压裂效率。为了防止水泛滥和进一步的水力压裂，了解剪切诱导的沉积岩石裂缝渗透性的演变非常重要。在这项研究中，通过进行三轴剪切测试并检查未切除和剪切的裂缝表面的3-D地形，研究了剪切诱导的锯切砂岩裂缝中剪切诱导的渗透性的演变。结果允许得出几个重要的结论。（1）裂缝的渗透性遵循三阶段的剪切偏位依赖性进化。在第一个稳定阶段，渗透性保持不变。之后，随着剪切位移的增加，渗透率急剧降低。最后，渗透性进入了第二个稳定阶段。 (2) The shear stress versus shear-displacement curves can also be divided into three stages, namely, a stress adjustment stage, a stage of increasing stress, and a stable stage. During the experiments, the fractures always experienced stick-slip shear in the stable stage. The oscillations of the shear stress in the stick-slip stage had a higher frequency for fractures with rougher surfaces. In addition, the rougher surfaces exhibited a greater permeability drop after shearing than that shown by smoother fracture surfaces. (3) The 3-D scanning results imply that the coupled effects of grinding (plus scraping) and sealing lead to decreased permeability. During shearing, the fracture walls grind and scrape against each other resulting in partial flattening of the fracture surface and the production of fault gouge in the fracture. This leads in turn to the flow pathways being partially sealed by crushed mineral grains. SN - 1468-8115 UR - https://doi.org/10.1155/2018/2416481 DO - 10.1155/2018/2416481 JF - Geofluids PB - Hindawi KW - ER -