| 割缝钻孔水压致裂增透过程的数值模拟 |
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| 引用本文： | 王勇,杨毕,姚荐达.割缝钻孔水压致裂增透过程的数值模拟[J].煤炭技术,2014(9):45-47. |
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| 作者姓名： | 王勇 杨毕 姚荐达 |
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| 作者单位： | 贵州民族大学建筑工程学院;六盘水市能源局 |
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| 基金项目： | 贵州省科学技术厅、贵州民族大学科技联合基金(黔科合J字LKM[2013]09);贵州民族大学校科研项目(2014(17)) |
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| 摘 要： | 利用岩石破裂过程渗流-应力耦合分析系统RFPA2D-Flow,对比分析了单孔和割缝钻孔水力压裂失稳破裂过程。结果表明:割缝钻孔预制缝槽转移集中应力达到卸压效果,诱导高压水流沿缝槽形成主裂隙向外扩展,有效削弱煤岩的强度和整体性达到水压致裂增透的效果;水压致裂裂隙路径的粗糙度和不规则展布受围岩非均匀性的影响十分显著。
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| 关 键 词： | 割缝钻孔 水压致裂 增透过程 数值模拟 |
Numerical Simulation of Process of Hydraulic Fracturing of Slotted Drilling |
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| WANG Yong;YANG Bi;YAO Jian-da.Numerical Simulation of Process of Hydraulic Fracturing of Slotted Drilling[J].Coal Technology,2014(9):45-47. |
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| Authors: | WANG Yong;YANG Bi;YAO Jian-da |
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| Affiliation: | WANG Yong;YANG Bi;YAO Jian-da;Architecture and Civil Engineering College,Guizhou National University;Energy Bureau of Liupanshui; |
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| Abstract: | Using the coupled seepage and stress of rock failure process analysis system RFPA2D-Flow,analysis of the single drilling and slotted drilling hydraulic fracturing buckling failure process.The results showed that the slotted drilling precast slot transfer unloading effect of stress concentration,induction of high pressure water flow along the slot form the main crack extension outward,effectively weaken the strength of the coal and rock and integrity to achieve the effect of hydraulic fracturing increase through; hydraulic fracturing fracture roughness of the path and irregular distribution affected by surrounding rock heterogeneity is significant. |
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| Keywords: | slotted drilling hydraulic fracturing anti-reflection process numerical simulation |
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