| 一种用于水压致裂试验的水压供给装置研制及应用 |
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| 引用本文： | 张波,李垚,杨学英,朱飘扬,朱春帝,刘子豪,刘文杰,罗志恒.一种用于水压致裂试验的水压供给装置研制及应用[J].岩土力学,2019,40(5):2022-2028. |
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| 作者姓名： | 张波 李垚 杨学英 朱飘扬 朱春帝 刘子豪 刘文杰 罗志恒 |
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| 作者单位： | 1. 山东大学 土建与水利学院，山东 济南 250061；2. 山东城市建设职业学院，山东 济南 250014 |
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| 基金项目： | 国家自然科学基金面上项目(No.51879151, No. 51879148)，国家自然科学基金委联合基金(No. U1806226)。 |
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| 摘 要： | 为研究水压致裂过程中水力裂缝的起裂、扩展规律及机制，研制了一种新型水压供给控制装置。该装置由水泵、增压泵、空气压缩机和导水钢垫板等组成。该装置的主要特点是易于与目前广泛存在的压力伺服机相配合，共同完成水压致裂试验，具有操作简便、效率高、成本低、组装方便等优点，使水压致裂试验更易大面积推广。利用该试验装置对类岩石试块进行了水压致裂试验，研究了不同围压下含预置裂隙试件的水力裂缝扩展规律，并与无预置裂隙试件水力裂缝扩展规律进行了对比。试验结果表明，对于含预置裂隙试块，当水平应力差较小时，预置裂隙裂尖对水力裂缝扩展影响较大，水力裂缝起裂后向预置裂隙裂尖方向扩展；随着水平应力差的增大，水力裂缝向最大水平应力方向偏转。试验证明该装置可靠性高，试验过程稳定。该研究对水压致裂试验具有促进意义。
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| 关 键 词： | 水压致裂 水压供给装置 裂纹扩展方向 预置裂隙 水平应力差 |
| 收稿时间： | 2018-07-23 |
Design and application of a hydraulic pressure supply device for hydraulic fracturing experiments |
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| ZHANG Bo,LI Yao,YANG Xue-ying,ZHU Piao-yang,ZHU Chun-di,LIU Zi-hao,LIU Wen-jie,LUO Zhi-heng.Design and application of a hydraulic pressure supply device for hydraulic fracturing experiments[J].Rock and Soil Mechanics,2019,40(5):2022-2028. |
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| Authors: | ZHANG Bo LI Yao YANG Xue-ying ZHU Piao-yang ZHU Chun-di LIU Zi-hao LIU Wen-jie LUO Zhi-heng |
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| Institution: | 1. School of Civil Engineering, Shandong University, Jinan, Shandong 250061, China;
2. Shandong Urban Construction Vocational College, Jinan, Shandong 250014, China |
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| Abstract: | To investigate the initiation and propagation of hydraulic fracturing, a new type of hydraulic pressure supplying and controlling device and its operational approach are developed. The device consists of water pump, booster pump, air compressor, water guiding steel subplate and other components. This device is prone to combine with the pressure servo machine to complete the hydraulic fracturing experiment. It has the advantages of simple operation, high efficiency, low cost, and easy assembly, which makes the hydraulic fracturing experiment easier to be popularized in a wide range. The hydraulic fracturing test of rock-like specimens are carried out by using this test device. Hydraulic fracture propagation of specimens with pre-existing flaws under different confining pressures are studied and compared with that of specimens without pre-existing flaws. The experimental results show that when the horizontal stress difference is low, the pre-existing flaw tip exposes great influence on hydraulic fracture propagation, and the hydraulic fracture propagates towards it. With increasing the horizontal stress difference, the hydraulic fracture deflects towards the direction of the maximum horizontal stress. The experiment shows that the device developed in this research has high reliability and stability. This study has a promoting significance for the hydraulic fracturing test. |
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| Keywords: | hydraulic fracturing water pressure supply device fracture propagation direction pre-existing flaw horizontal stress difference |
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