| 深埋隧道岩爆规模现场快速估算方法 |
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| 引用本文： | 刘国锋,李志强,王晓明,段淑倩,丰光亮,晏长根.深埋隧道岩爆规模现场快速估算方法[J].中国地质灾害与防治学报,2020,31(1):57-64. |
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| 作者姓名： | 刘国锋 李志强 王晓明 段淑倩 丰光亮 晏长根 |
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| 作者单位： | 长安大学公路学院;中交隧道工程局有限公司;郑州大学土木工程学院;中国科学院武汉岩土力学研究所 |
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| 基金项目： | 中央高校基本科研业务费项目(300102218108,300102218412);陕西省自然科学基础研究计划项目(2019JQ-171);中国博士后科学基金面上项目(2018M632806);长安大学研究生科研创新实践项目(300103002006) |
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| 摘 要： | 以岩爆破坏的洞壁面积及爆落的岩体体积作为衡量岩爆灾害规模的重要指标,提出一种基于现场测量信息的爆坑几何形态快速建模及岩爆规模估算方法,该方法的重要组成部分包括:爆坑形态类型的概化、爆坑测量断面的选取、控制测点的确定及坐标记录、爆坑纵横断面轮廓线线型的拟合、洞壁破坏面积与爆坑体积估算公式的推导。针对工程中常见的窝型与V型爆坑,分别建立了适用于隧道直线形与拱形洞壁的岩爆规模估算公式,探讨了非典型窝型与V型爆坑,岩爆规模估算的近似处理方法。将所提出的方法应用于我国西南锦屏二级水电站深埋引水隧洞工程的岩爆规模估算,典型案例验证结果表明,利用该估算方法所给出的结果与现场实际的岩爆规模接近一致,估算误差约为15%以内。研究成果能够为岩爆烈度等级划分及严重程度的评定提供重要的基础性指标。
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| 关 键 词： | 深埋隧道 岩爆 爆坑体积 灾害规模 锦屏二级水电站 |
Field rapid estimation method for the scale of rockburst in deep tunnels |
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| LIU Guofeng,LI Zhiqiang,WANG Xiaoming,DUAN Shuqian,FENG Guangliang,YAN Changgen.Field rapid estimation method for the scale of rockburst in deep tunnels[J].The Chinese Journal of Geological Hazard and Control,2020,31(1):57-64. |
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| Authors: | LIU Guofeng LI Zhiqiang WANG Xiaoming DUAN Shuqian FENG Guangliang YAN Changgen |
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| Affiliation: | (School of Highway,Chang’an University,Xi’an,Shaanxi 710064,China;CCCC Tunnel Engineering Company Limited,Beijing 100102,China;School of Civil Engineering, Zhengzhou University,Zhengzhou,Henan 450001, China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China) |
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| Abstract: | Considering the area of wall surface damaged by rockburst and the volume of rock mass ejected as two important indexes to measure the scale of rockburst disaster,a method for rapid modeling of rockburst pit and estimating of rockburst scale based on field data is proposed.The important components of this method are type generalization of rockburst pit,selection of measured sections of rockburst pit,determination and coordinate record of the control points,fitting of the contour line of rockburst pit,derivation of estimation formulas about the wall area damaged by rockburst and volume of rockburst pit.For the rockburst pits of fossa-type and V-type which are common in engineering,the estimation formulas of the rockburst scale are proposed,which can be suitable for the linear and arched walls of the tunnel respectively.Besides,a disposal method applied to approximately estimate the scale of the a typical fossa-type and V-type rockburst pits is discussed.The method was applied to estimate the rockburst scale of deep-buried diversion tunnel project of Jinping-ⅡHydropower Station in southwest China.The results of typical cases given by using this estimation method are close to the actual rockburst scale in the field and the estimation error is about 15%.This research can provide fundamental indexes to classify the intensity and evaluatethe severity of rockburst. |
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| Keywords: | deep buried tunnel rockburst volume of rockburst pit disaster scale Jinping-II Hydropower Station |
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