| 定向水力压裂裂隙扩展动态特征分析及其应用 |
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| 引用本文： | 徐幼平,林柏泉,翟成,李贤忠,孙鑫,李全贵.定向水力压裂裂隙扩展动态特征分析及其应用[J].中国安全科学学报,2011,21(7). |
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| 作者姓名： | 徐幼平 林柏泉 翟成 李贤忠 孙鑫 李全贵 |
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| 作者单位： | 中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116;中国矿业大学安全工程学院,江苏徐州221116 |
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| 基金项目： | 国家自然科学基金资助(51074161); 国家重点基础研究发展计划资助(2011CB201205); 煤炭资源与安全开采国家重点实验室自主研究课题(SKLCRSM08X03); 国家科技支撑计划项目(2007BAK00168-1) |
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| 摘 要： | 为减少煤矿井下水力压裂卸压盲区,扩大压裂影响范围,提高卸压增透效果,在分析水力压裂起裂机理和裂隙发展特征的基础上,提出定向水力压裂技术,分析定向水力压裂过程中煤体的裂隙发展分布规律,并利用RFPA2D-Flow软件模拟了压裂的起裂、扩展和延伸过程,对定向压裂与非定向压裂的效果进行了比较。最后将定向水力压裂技术在平煤集团十二矿己15-31010工作面进行了现场应用,得出在27 MPa的水压下,单孔压裂有效影响半径达6 m;单孔瓦斯抽放平均浓度较未压裂时提高80%,平均流量上升了382%,取得了显著的效果,具有良好的推广应用价值。
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| 关 键 词： | 穿层 定向水力压裂 卸压增透 RFPA2D-Flow软件 声发射 |
Analysis on Dynamic Characteristics of Cracks Extension in Directional Hydraulic Fracturing and Its Application |
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| XU You-ping,LIN Bai-quan,ZHAI Cheng,LI Xian-zhong,SUN Xin,LI Quan-gui.Analysis on Dynamic Characteristics of Cracks Extension in Directional Hydraulic Fracturing and Its Application[J].China Safety Science Journal,2011,21(7). |
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| Authors: | XU You-ping LIN Bai-quan ZHAI Cheng LI Xian-zhong SUN Xin LI Quan-gui |
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| Institution: | XU You-ping1,2 LIN Bai-quan1,2 ZHAI Cheng1,2 LI Xian-zhong1,2 SUN Xin1,2 LI Quan-gui1,2(1 State Key Laboratory of Coal Resources & Mine Safety,China University of Mining & Technology,Xuzhou Jiangsu 221116,China 2 School of Safety Engineering,China) |
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| Abstract: | In order to reduce roof-floor blind area of hydrofracture in underground mines,expand influenced range of fracturing,and improve the effect of hydrofracture,a directional hydraulic fracturing technique was proposed on the basis of analyzing the mechanism of crack initiation and the characteristics of fracture development.And the process of crack starting,extending and elongating was simulated with RFPA2D-Flow.The effect of directional hydraulic fracturing and the effect of non-directional hydraulic fracturi... |
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| Keywords: | cross layer directional hydraulic fracturing pressure relief and permeability increase RFPA2D-Flow software acoustic emission |
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