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学者姓名:黄真萍
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Abstract :
假定岩体随机结构面形状为薄圆盘,为能科学合理估算其平均直径,基于半迹长测线法,在未对分布形式作任何假设的条件下,通过理论推导获得与测线交切半迹长和岩体随机结构面直径之间的普适关系式.为便于工程应用,假设岩体随机结构面直径服从负指数分布,推导出其平均直径和与测线交切平均半迹长的关系式,基于该式提出一种岩体随机结构面平均直径的估算方法.采用岩体随机结构面三维网络模拟技术对此方法进行应用检验,结果表明,该方法具有较高的准确性与较强的工程适用性.
Keyword :
三维网络模拟 三维网络模拟 半迹长 半迹长 岩体 岩体 平均直径 平均直径 测线法 测线法 随机结构面 随机结构面
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GB/T 7714 | 曹洋兵 , 谢浩 , 张遂 et al. 基于与测线交切半迹长的岩体随机结构面平均直径估算 [J]. | 福州大学学报(自然科学版) , 2023 , 51 (1) : 133-139 . |
MLA | 曹洋兵 et al. "基于与测线交切半迹长的岩体随机结构面平均直径估算" . | 福州大学学报(自然科学版) 51 . 1 (2023) : 133-139 . |
APA | 曹洋兵 , 谢浩 , 张遂 , 黄真萍 , 邱冬冬 , 关慰清 . 基于与测线交切半迹长的岩体随机结构面平均直径估算 . | 福州大学学报(自然科学版) , 2023 , 51 (1) , 133-139 . |
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揭示裂隙岩体纵波速度变化规律对工程岩体质量分级与稳定性评价具有重要意义.以某地下水封洞库无充填型单裂隙花岗岩为研究对象,基于钻孔电视成像、水压致裂法地应力测试与声波全波列测井,获取了 384组单裂隙花岗岩的几何特性、受力状态与纵波速度,构建起了预测单裂隙花岗岩纵波速度的进化-神经网络模型,分析了关键指标影响下单裂隙花岗岩纵波速度的变化规律.研究表明:该水封洞库单裂隙花岗岩纵波速度分布于4 300~5 330 m/s之间,82.3%的纵波速度在4 700~5 200 m/s之间;选取裂隙法向应力、平均张开度与倾角作为单裂隙花岗岩纵波速度的预测指标是合理可行的;将现场测试数据分为训练样本与测试样本,基于遗传算法优化神经网络权值、阈值的进化-神经网络模型构建出单裂隙花岗岩纵波速度预测模型,其测试误差最大仅为2.9%,85%的样本测试误差不超过1.5%,预测模型精度较高.分析了纵波速度变化规律,发现单裂隙花岗岩纵波速度随裂隙法向应力增大而增大,但当法向应力增至5 MPa后的纵波速度增大速率逐渐减小,纵波速度随裂隙张开度增大而逐渐减小,纵波速度在裂隙倾角小于40°时无明显变化,此后纵波速度随倾角增大而增大.
Keyword :
单裂隙花岗岩 单裂隙花岗岩 声波测试 声波测试 水封洞库 水封洞库 神经网络模型 神经网络模型 纵波速度 纵波速度
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GB/T 7714 | 曹洋兵 , 吴阳 , 张朋 et al. 地下水封洞库单裂隙花岗岩纵波速度变化规律与预测模型 [J]. | 地质科技通报 , 2023 , 42 (6) : 12-20 . |
MLA | 曹洋兵 et al. "地下水封洞库单裂隙花岗岩纵波速度变化规律与预测模型" . | 地质科技通报 42 . 6 (2023) : 12-20 . |
APA | 曹洋兵 , 吴阳 , 张朋 , 江志豪 , 张思怡 , 黄真萍 . 地下水封洞库单裂隙花岗岩纵波速度变化规律与预测模型 . | 地质科技通报 , 2023 , 42 (6) , 12-20 . |
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Granite in underground water-sealed storage caverns has usually been immersed for a long time. The immersion affects the mechanical properties and failure mechanism of granite with maximum free water absorption; therefore, it is crucial to study the behavior of granite under different confining pressures for engineering construction. A triaxial compression test with maximum free water absorption was conducted on granite and its mechanical properties were analyzed. A fracture scanning electron microscope test was carried out to analyze the microstructural characteristics and reveal the failure mechanism. The test results showed that the differential stress-axial strain curve can be divided into the initial compaction stage, the elastic deformation stage, the plastic deformation stage, and the post-peak strain-softening stage. With an increase in confining pressure, the duration of the initial compaction stage decreased, while the plastic deformation stage and the peak strength and peak strain stages increased. For the confining pressure range of 0-20 MPa, the peak stress difference of granite with maximum free water absorption was between 146.0 and 307.6 MPa. The elastic modulus was between 31.36 and 44.18 GPa. The cohesion (c) of the rock sample studied was 26.84 MPa and the internal friction angle (phi) was 51 degrees. The failure mechanism of granite is tensile-shear composite failure, predominantly with tensile failure under low confining pressure regimes, and the inclined fracture surface is mainly due to shear failure under high confining pressure conditions. These research results provide updated reference data for rock engineering involving granitic mechanical properties and failure mechanisms in submerged caverns.
Keyword :
confining pressure confining pressure failure mechanism failure mechanism granite granite mechanical properties mechanical properties water absorption water absorption
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GB/T 7714 | Zhang, Yaoyao , Cao, Yangbing , Li, Zhijun et al. Mechanical Properties and Failure Mechanism of Granite with Maximum Free Water Absorption under Triaxial Compression [J]. | APPLIED SCIENCES-BASEL , 2022 , 12 (8) . |
MLA | Zhang, Yaoyao et al. "Mechanical Properties and Failure Mechanism of Granite with Maximum Free Water Absorption under Triaxial Compression" . | APPLIED SCIENCES-BASEL 12 . 8 (2022) . |
APA | Zhang, Yaoyao , Cao, Yangbing , Li, Zhijun , Chen, Yangtao , Huang, Zhenping . Mechanical Properties and Failure Mechanism of Granite with Maximum Free Water Absorption under Triaxial Compression . | APPLIED SCIENCES-BASEL , 2022 , 12 (8) . |
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The instability of jointed rock mass is usually the shear process of the rock mass along discontinuities under the influence of groundwater flow. By conducting laboratory tests and numerical experiments on the shear-flow coupling of rock joints under constant normal stiffness (CNS) and constant normal stress (CNL) boundary conditions, the influence of normal boundary conditions and seepage pressure on the shear mechanical and flow characteristics of joints were investigated. The test results were as follows: The joint shear stiffness, peak, and residual shear strength under the CNS boundary condition were predominantly larger than those under the CNL boundary condition. Overall, these parameters were positively correlated with the initial normal stress sigma(n0). When sigma(n0)> 2 MPa, the postpeak shear stress of the CNS boundary condition showed a sharp decrease, whereas that of the CNL boundary condition changed from a slowly decreasing type (sigma(n0)=4 MPa, 6 MPa) to a sharply decreasing type at sigma(n0)=8 MPa. The peak dilation rate under the CNS boundary condition at all levels of normal stress was lower than that of CNL, and the strain softening in postpeak of the latter was more remarkable. In the process of joint shear, the hydraulic aperture displayed a four-stage variation law of "steady-sudden increase-slow increase-basically stable. " Moreover, the hydraulic aperture under the CNS boundary condition was always lower than that under the CNL boundary condition. The seepage pressure increased from 0.5 MPa to 1.5 MPa, and the average hydraulic aperture in the stable stage under normal stress at all levels increased from 0.146 mm to 0.187 mm. In addition, the average peak shear stress and average shear stiffness decreased by 0.9 MPa and 0.83 GPa/m, respectively. We also established a numerical model of a real rough three-dimensional joint, compiled a calculation program for the shear-flow process of a joint under CNS boundary conditions, and visualized the flow channel inside the joint. The seepage flow bypassed the area where the joints contacted each other, forming obvious flow channels. The flow rate increased at the intersection of the flow channels.
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GB/T 7714 | Cao, Yangbing , Wu, Yang , Zhang, Xiangxiang et al. Experimental Study on the Influence of Hydromechanical Boundary Conditions on Shear-Flow Coupling Characteristics of Granite Joints [J]. | GEOFLUIDS , 2022 , 2022 . |
MLA | Cao, Yangbing et al. "Experimental Study on the Influence of Hydromechanical Boundary Conditions on Shear-Flow Coupling Characteristics of Granite Joints" . | GEOFLUIDS 2022 (2022) . |
APA | Cao, Yangbing , Wu, Yang , Zhang, Xiangxiang , Liu, Zhi , Gong, Weiguo , Huang, Zhenping . Experimental Study on the Influence of Hydromechanical Boundary Conditions on Shear-Flow Coupling Characteristics of Granite Joints . | GEOFLUIDS , 2022 , 2022 . |
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本发明涉及一种用于薄层倾斜矿体顶板支护的掩护支架底座,包括底板、对称设置在底板上的两个水平导轨,水平导轨上设置有与其滑动配合的滑动块,滑动块上端铰接有液压支柱,水平导轨上设置有滑轨钳制器,滑轨钳制器与滑动块连接固定,本底座结构简单,设计合理,滑动块在水平导轨上滑动以带动液压支柱转动,从而调整支架整体高度,适应矿体厚度和倾角变化,保证开采活动的顺利进行和人员安全。
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GB/T 7714 | 曹洋兵 , 鲍闽 , 张遂 et al. 用于薄层倾斜矿体顶板支护的掩护支架底座 : CN202121644346.7[P]. | 2021-07-20 . |
MLA | 曹洋兵 et al. "用于薄层倾斜矿体顶板支护的掩护支架底座" : CN202121644346.7. | 2021-07-20 . |
APA | 曹洋兵 , 鲍闽 , 张遂 , 沈红钱 , 李兵磊 , 刘成禹 et al. 用于薄层倾斜矿体顶板支护的掩护支架底座 : CN202121644346.7. | 2021-07-20 . |
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本实用新型涉及一种用于矿体顶板支护的液压掩护支架前梁与顶梁间伸缩结构,包括伸缩结构前部与伸缩结构后部,伸缩结构前部的内部固连有伸缩体,伸缩结构后部安装有用以驱动伸缩体前后伸缩的驱动机构。本实用新型为液压掩护支架前梁与顶梁之间的可伸缩连接装置,可以对液压掩护支架的宽度进行伸缩调整,适应采矿现场的支护需求,提高了安全系数,确保了开采安全。
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GB/T 7714 | 张遂 , 鲍闽 , 曹洋兵 et al. 用于矿体顶板支护的液压掩护支架前梁与顶梁间伸缩结构 : CN202121644904.X[P]. | 2021-07-20 . |
MLA | 张遂 et al. "用于矿体顶板支护的液压掩护支架前梁与顶梁间伸缩结构" : CN202121644904.X. | 2021-07-20 . |
APA | 张遂 , 鲍闽 , 曹洋兵 , 沈红钱 , 李兵磊 , 刘成禹 et al. 用于矿体顶板支护的液压掩护支架前梁与顶梁间伸缩结构 : CN202121644904.X. | 2021-07-20 . |
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本实用新型提供了一种用于支护矿体顶板的液压掩护支架的安全棚,包括左右对称设置的横梁,所述横梁一端下设置有升降装置,所述横梁的另一端安装有用于与液压掩护支架相连的连接结构,两个横梁之间连接有防护钢板。本实用新型设计合理,可以及时对裸露的顶板进行支护,提高了安全系数,确保了开采安全。
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GB/T 7714 | 张遂 , 鲍闽 , 曹洋兵 et al. 用于支护矿体顶板的液压掩护支架的安全棚 : CN202121648356.8[P]. | 2021-07-20 . |
MLA | 张遂 et al. "用于支护矿体顶板的液压掩护支架的安全棚" : CN202121648356.8. | 2021-07-20 . |
APA | 张遂 , 鲍闽 , 曹洋兵 , 沈红钱 , 李兵磊 , 刘成禹 et al. 用于支护矿体顶板的液压掩护支架的安全棚 : CN202121648356.8. | 2021-07-20 . |
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花岗岩在不同含水率条件下的变形破坏特征和机制对此类工程岩体稳定性评价具有重要的意义。开展不同含水率黑云母二长花岗岩单轴压缩试验,分析破坏特征和应力-应变曲线特征,开展断口扫描电镜试验,分析微观形貌特征,研究破坏机制。试验结果表明:黑云母二长花岗岩具有明显的应变软化特征;随含水率增大,曲线上微裂隙压密阶段长度逐渐增加,稳定破裂阶段及非稳定破裂阶段长度均逐渐缩短,但所占比例增大,曲线上峰前阶段涨落交替现象加剧;饱和时单轴抗压强度和弹性模量相比干燥时分别降低了40.68%,20.3%;变形破坏过程可大致分为以下5个阶段:平静期、裂纹萌生期、裂纹扩展伴随颗粒弹射期、片状碎片剥落伴随颗粒弹射期及崩落式破...
Keyword :
力学特性 力学特性 含水率 含水率 破坏机制 破坏机制 破坏特征 破坏特征 黑云母二长花岗岩 黑云母二长花岗岩
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GB/T 7714 | 曹洋兵 , 陈玉华 , 张朋 et al. 单轴压缩条件下不同含水率黑云母二长花岗岩破坏特征与机制 [J]. | 地质科技通报 , 2021 , 40 (03) : 163-172 . |
MLA | 曹洋兵 et al. "单轴压缩条件下不同含水率黑云母二长花岗岩破坏特征与机制" . | 地质科技通报 40 . 03 (2021) : 163-172 . |
APA | 曹洋兵 , 陈玉华 , 张朋 , 黄真萍 , 张向向 , 陈杨涛 . 单轴压缩条件下不同含水率黑云母二长花岗岩破坏特征与机制 . | 地质科技通报 , 2021 , 40 (03) , 163-172 . |
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本发明涉及一种用于薄层倾斜矿体开采支护的掩护支架及施工方法,包括支架本体、安全棚;支架本体包括前梁、顶梁、掩护梁、底座,所述掩护梁下端与底座后部铰接,掩护梁上端连接顶梁后端,顶梁前端经伸缩装置连接前梁,前梁前端连接安全棚;底座包括底板、对称设置在底板上的两个水平导轨,水平导轨上设置有与其滑动配合的滑动块,滑动块上端铰接有液压支柱,水平导轨上设置有滑轨钳制器,滑轨钳制器与滑动块连接固定,液压支柱上端与顶梁中部铰接,本支架整体高度可调,伸缩装置使得支架的宽度可调,为开采工作面上方裸露顶板提供支护,在支架前方安装有安全棚,在开采工作面提供支护,保证开采工作的安全性,为开采后裸露顶板提供支护。
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GB/T 7714 | 曹洋兵 , 鲍闽 , 张遂 et al. 用于薄层倾斜矿体开采支护的掩护支架及施工方法 : CN202110816577.X[P]. | 2021-07-20 . |
MLA | 曹洋兵 et al. "用于薄层倾斜矿体开采支护的掩护支架及施工方法" : CN202110816577.X. | 2021-07-20 . |
APA | 曹洋兵 , 鲍闽 , 张遂 , 沈红钱 , 李兵磊 , 刘成禹 et al. 用于薄层倾斜矿体开采支护的掩护支架及施工方法 : CN202110816577.X. | 2021-07-20 . |
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以某在建工程线路经过老城区主干道的地质与环境调查为研究对象,采用地质雷达探测方法,在路面合理布设探测剖面和观测系统;通过对采集的地质雷达记录进行有效处理和地质雷达图像的分析,研究如何在地铁隧道勘察中根据场地条件和探测的目标物,综合识别未知涵洞.研究结果表明:通过设计纵横跟踪布设地质雷达探测剖面,选择恰当的资料处理参数和模块,能够有效探测未知涵洞的具体位置和规模,为工程设计与施工提供合理建议,降低施工风险.
Keyword :
地下工程 地下工程 地质雷达 地质雷达 地铁勘察 地铁勘察 探测 探测 涵洞 涵洞
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GB/T 7714 | 黄真萍 , 吴阳 , 邱宗新 et al. 地质雷达探测地铁沿线未知涵洞的研究与应用 [J]. | 福州大学学报(自然科学版) , 2021 , 49 (02) : 254-260 . |
MLA | 黄真萍 et al. "地质雷达探测地铁沿线未知涵洞的研究与应用" . | 福州大学学报(自然科学版) 49 . 02 (2021) : 254-260 . |
APA | 黄真萍 , 吴阳 , 邱宗新 , 李萍 , 林之航 . 地质雷达探测地铁沿线未知涵洞的研究与应用 . | 福州大学学报(自然科学版) , 2021 , 49 (02) , 254-260 . |
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