| 岩体交叉裂隙水流分配特性研究 |
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| 引用本文： | 桑盛,刘卫群,宋良,章统,沈汉栋.岩体交叉裂隙水流分配特性研究[J].实验力学,2016(5):577-583. |
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| 作者姓名： | 桑盛 刘卫群 宋良 章统 沈汉栋 |
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| 作者单位： | 1. 中国矿业大学力学与建筑工程学院,江苏徐州221116;中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221116;2. 烟台大学机电汽车工程学院,山东烟台,264005;3. 中国矿业大学力学与建筑工程学院,江苏徐州,221116;4. 浙江东南网架股份有限公司,浙江杭州,310000 |
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| 基金项目： | 国家973计划(2015CB251602;2009CB219605)，国家自然科学基金(41074040;50774083)，江苏省自然科学基金(BK20141125) |
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| 摘 要： | 岩体交叉裂隙的水流分配特性对揭示水体运移规律、人工疏导地下水、优化水力压裂方案等具有指导作用。文章利用自制裂隙渗流实验装置测试了常见"一进两出""人"字裂隙开度、交叉角度变化时的流量分配特性。利用交叉控制体模型和雷诺输运方程分析了产生流量差异的原因。结果表明,偏流来自惯性力与裂隙壁面法向力作用产生的漩涡;流量分配只受进口和旁路裂隙开度的影响,与交角和水力梯度无关;旁路流量比(旁路流量与进口流量之比)与裂隙开度间存在实验幂次定量关系。
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| 关 键 词： | 交叉裂隙 交叉角度 裂隙开度 流动状态 流量分配 |
On the Flow Distribution Characteristics of Cross Cracks in Rock Mass |
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| Abstract: | Flow distribution characteristics of cross cracks in rock mass play a guiding role in revealing the water movement pattern,groundwater artificial channeling and optimization of hydraulic fracturing scheme,etc.In this paper,using a home-made crack seepage experimental device,the flow distribution characteristics of common herringbone cracks (so called "one way in two ways out") with different crack openings and different cross angles were experimentally measured.Taking advantage of cross control volume model and Reynolds transport equation,the reason of flow difference was analyzed.Results show that bias current is caused due to the vortex produced by the interaction between inertia force and normal force of crack surface.Flow distribution is only affected by inlet and bypass crack opening,and has nothing to do with the angle and hydraulic gradientd.The bypass flow ratio (the ratio of the bypass flow and inlet flow) has the experimental power of quantitative relation with crack opening. |
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| Keywords: | cross cracks cross angle crack opening flow state flow distribution |
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