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Dynamic evolution in mechanical characteristics of complex supporting structures during large section tunnel construction
Hua Jiang, Jianhua Mu, Jinxun Zhang, Yusheng Jiang, Chongyang Liu, Xiaoyan Zhang
发布时间：2023-01-06
关键词：large section tunnel, mechanical characteristics, on‐site monitoring, supporting structure,the shallow tunnelling method
摘要：Based on the mechanical characteristics of the support system, some engineering suggestions were proposed for large section tunnel construction. These research results can provide reference for the design and construction of similar large section tunnels.
阅读全文 PDF 引用Potential triggers for large earthquakes in open-pit mines: A case study from Kuzbass, Siberia
Gevorg Kocharyan, Chengzhi Qi, Svetlana Kishkina, Vladimir Kulikov
发布时间：2023-01-06
关键词：anthropogenic impact, Coulomb stress variations, fault, induced seismicity,open pits
摘要：By measuring seismic vibrations at different quarries and mines in Russia, the dynamic effect at the supposed depth of the source occurrence could be reliably estimated. As is shown, the ultimate anticipated dynamic deformations are noticeably lower than corresponding values produced by seismic waves of distant earthquakes in the case when the effects of dynamic triggering were observed. Accordingly, the seismic effect of explosions cannot trigger a large earthquake with deep source occurrence. Operations in open-pit mines can only bring forward the moment of an earthquake at a potentially seismogenic fault. At the same time, the numerical calculations reveal that a branching network of underground tunnels located at several horizons can noticeably reduce the effective shear modulus of the host rock. This effect can even provoke a dynamic movement at a previously aseismic fault.
阅读全文 PDF 引用Coal rock image recognition method based on improved CLBP and receptive field theory
改进原CLBP算法 满足采煤工作智能需求
Chuanmeng Sun,Ruijia Xu,Chong Wang,Tiehua Ma,Jiaxin Chen
发布时间：2022-12-12
Effect of joints on microwave fracturing of the Bukit Timah granite using an open-ended antenna
Zhongjun Ma,Yanlong Zheng,Lei He,Jianchun Li
发布时间：2022-12-08
关键词：Effect of joints on microwave fracturing the Bukit Timah granite using an openended antenna
摘要：AbstractMicrowave fracturing of rocks before mechanical breakage could improve the performance of mechanical excavators and reduce environmental impacts. Previous research focused on the microwave fracturing of intact rock blocks. By using an open-ended antenna, this paper investigates the effect of pre-existing joints on the microwave fracturing of the Singapore Bukit Timah granite blocks. The...
阅读全文 PDF 引用Evaluation of rockburst proneness considering specimen shape by storable elastic strain energy
岩爆倾向性研究取得新进展
Song Luo, Fengqiang Gong
发布时间：2022-12-08
Hydrogeological feasibility of mine water deep geological storage in Baotashan coarse sandstone: A case study in Ordos Basin
鄂尔多斯-矿井水深部地质封存迫在眉睫
Ge Chen, Yajun Sun, Zhimin Xu, Xin Li
发布时间：2022-12-08
Numerical simulation of zonal disintegration of surrounding rock in the deep-buried chamber
SU模型模拟分区破裂影响规律，有力揭示深埋围岩失稳机制
Yukai Wang, Xiaoli Liu, Yanlin Xiong
发布时间：2022-12-08
Exploring the frontiers of deep underground sciences and engineering—China Yunlong Lake Laboratory is striving to be the best
探索深地科学与工程前沿——中国云龙湖实验室正在前行
Lihua Hu, Jianguo Wang, Ali Karrech, Xiaozhao Li, Peng Zhao, Lulu Liu
发布时间：2022-12-08
关键词：fluid matter migration, large spatial scale, long time scale, multi‐lithology, research laboratory andfacility, underground space
摘要：本文旨在介绍深地科学与工程云龙湖实验室（云龙湖实验室）设立的科学背景、主要科学目标、总体建设格局和具体进展。首先，简要回顾了世界范围内深地科学与工程领域代表性实验室和科技设施及其主要研究内容。随后，介绍了云龙湖实验室揭牌（2021年10月22日于徐州成立）的总体建设格局，包括：三大研究领域、及其“1总部、3国家重点实验室、1山体原位试验基地、1江苏省重大科技基础设及1产业孵化园”。然后，着重介绍了江苏省重大科技基础设施——“深地空间流态物质运移综合实验设施”，及其科学目标、工程目标和目标用户群。该重大科技基础设施旨在解决未来地球深部能源资源开发、能源物资深地存储、二氧化碳及危废地下封存等领域的共性基础科学问题——“深地空间流态物质运移规律”，力争在不久的将来建成中国首个深地领域重大科技基础设施。最后，介绍了云龙湖实验室在平台基地、科研攻关、人才团队等方面的建设进展。期望得到社会各界的关怀和支持，经过我们的持续努力，云龙湖实验室将建成中国乃至世界在深地科学与工程领域一个大型、多功能的综合研究中心和前沿研究攻关公共平台。我们竭诚与全世界范围内的专家、学者交流，也欢迎您们加入，云龙湖实验室将伴随您们取得辉煌！
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Advancing deep underground research through integration of engineering and science
Heping Xie, Chunfai Leung, Jianguo Wang, Xiaozhao Li
发布时间：2022-12-08
关键词：EDITORIAL
摘要：Deep underground provides enormous resources for mankind, such as energy, minerals, and water. It can also provide effective solutions for pollutant disposal, such as nuclear waste disposal and CO2 geosequestration, as well as storage spaces. In addition, deep underground is of great necessity because it provides an ultra-quiet environment for scientific research facilities for advanced experim...
阅读全文 PDF 引用Frictional Stability of Longmaxi Shale Gouges and Implications for Deep Seismic Potential in the Southeastern Sichuan Basin
四川盆地东南部龙马溪页岩摩擦稳定性及其对深部地震潜力的启示
张丰收，崔力，安孟可，Derek Elsworth，何昌荣
发布时间：2022-09-15
关键词：deep shale reservoir, hydraulic fracturing, hydrothermal condition, induced seismicity, mineralcomposition, shale fault stability
摘要：页岩气开采过程中发生的微地震凸显了理解页岩摩擦稳定性的重要性。本文用x射线衍射(XRD)法测定了收集的5个龙马溪页岩样品的矿物组成，完成了11组页岩断层泥剪切实验，并探讨了矿物组成和温度对四川盆地东南部泸州区块龙马溪页岩摩擦稳定性的影响。结果发现：矿物组成和温度都会影响龙马溪页岩的摩擦强度和稳定性；页岩断层泥的摩擦强度和不稳定性随架状硅酸盐和碳酸盐含量的增加而增加；随着温度升高，页岩断层泥在200°C的临界温度下出现了由速度强化到速度弱化的转变；温度和矿物组成的综合影响对页岩断层的摩擦响应具有重要的控制作用。
阅读全文 PDF 引用Additive manufacturing technology in mining engineering research
增材制造技术在采矿工程中的应用
冯晓巍，Valter Carvelli
发布时间：2022-09-14
关键词：3D printing system, additive manufacturing, coal mine supports, mining engineering, physical model
摘要：增材制造技术俗称3D打印技术，该技术是传统制造技术的革新，目前在多个领域已有广泛应用，但是这一技术在矿业工程领域中的应用尚处于起步阶段。本研究探讨了3D打印技术在矿业工程研究中的应用，提出了金属粉末3D打印成型技术、ABS/PLA材料3D打印成型技术、混凝土3D打印成型技术。基于金属粉末成型技术，本研究制造了可变尺度的成套矿用金属支护构件，构件几何细节和力学强度均得以高度还原。 基于ABS/PLA材料成型技术，本研究在相似物理模型中实现了精准巷道定位、精准支护系统植入、精准地质结构复制。基于混凝土材料成型技术，本研究复制了工程模型的室内物理模型，在高缩尺比下实现了巷道模型和支护构件的双重还原，并基于多重监测手段验证了其科学合理性。 最后，本研究提出了矿山相似物理模型的双喷嘴增材制造搭建系统，并建立了工作机理和概念模型。本研究率先将增材制造技术拓展至矿业工程领域研究中，促成了高精度平行试验和多手段联合监测的应用，突破了以往技术瓶颈，为实现高精度、平行化、可控化、智能化的矿业工程试验技术奠定了基础。
阅读全文 PDF 引用Fracture distribution in overburden strata induced by underground mining
Wenli Yao, Enzhi Wang, Xiaoli Liu, Ran Zhou
发布时间：2022-12-08
关键词：groundwater seepage, mining‐induced fracture, numerical simulation, rock mass deformation, TEM
摘要：AbstractCoal-mining activities give rise to a series of ecological environmental problems, such as ground settlement and groundwater pollution. In fact, they are mainly caused by mining-induced fractures. Hence, it is necessary to study the mining-induced fracture distribution to identify the behavior of rock mass movement. However, the fractures in overburden strata cannot be directly measured...
阅读全文 PDF 引用Wear mechanism and life prediction of the ripper in a 9-m-diameter shield machine tunneling project of the Beijing new airport line in a sand-pebble stratum
北京地铁新机场线砂卵石地层9m直径土压平衡盾构撕裂刀磨损机理及寿命预测
江华，朱家辰，张小燕，张晋勋，李宏亮，孟令丰
发布时间：2022-09-14
关键词：9‐m‐diameter shield, long‐distance shield driving, optimum driving distance, sand‐pebble stratum,tool wear, wear prediction model
摘要：北京市砂卵石地层具有稳定性差、磨蚀性强、空间分布不均等特征，盾构在该类地层掘进过程中经常会出现刀具磨损严重、换刀频繁、地层变形难控制等问题，而解决此类问题的关键在于探究刀具的切削机理及磨损规律。 本研究以北京新机场线盾构工程为背景，采用了楔犁-松动-剥落的开挖理论，分析了砂卵石地层中9m直径盾构多梯次撕裂刀的磨损特性。采用理论分析及磁1区间现场原位磨损数据测量的手段，分析了撕裂刀五个耐磨块和底座侧面的磨损值。随着切削轨迹长度的增加，耐磨块磨损值通常随着安装半径的增加而增大。190-撕裂刀的磨损分为五类：底座磨损、耐磨块崩坏、均匀磨损、耐磨块脱落和侧面磨损。耐磨块均匀磨损和撕裂刀侧面磨损是190-撕裂刀的两种典型磨损类型。在190-撕裂刀的保护下，155-撕裂刀的绝大部分耐磨块保持着较完整的切削能力。基于建立的190-撕裂刀磨损预测模型，提出了砂卵石地层中盾构一次性不换刀最佳掘进距离。换刀前后190-撕裂刀的平均磨损系数拟合效果良好，分别为0.045 mm/km和0.066 mm/km。该研究结果为类似地质条件下盾构施工中的刀具磨损预测提供了理论参考。
阅读全文 PDF 引用The theory of compression–shear coupled composite wavepropagation in rock
岩石中压剪耦合复合波传播理论
陆建华，徐松林
发布时间：2022-09-29
关键词：compression–shear coupling, high pressure constitutive relation, rock dynamic, wave propagation,wave velocity
摘要：本研究提出了与岩石在高压作用下的力学性质一致的，岩石在压剪耦合载荷作用下的本构关系。得到了波动方程平面波数值解和首波和次波波速的解析解，研究了岩石的压剪耦合特性，包括应力路径效应和压剪耦合波效应。结果表明，在K1、K2、G1和G2的不同参数值下，二次波的波速从低于弹性剪切波速转变为高于弹性剪切波速。研究结果有望为超剪切波和亚瑞利波的物理机制提供有意义的解释，为岩土成分检测和地震波观测提供指导。
阅读全文 PDF 引用Stress wave propagation and incompatible deformation mechanisms in rock discontinuity interfaces in deep-buried tunnels
地震波物理传播模型 护航深埋隧道安全
Cong Zhang, Zhende Zhu, Shanyong Wang, Xuhua Ren, Chong Shi
发布时间：2022-12-08
High-performance computing of 3D blasting wave propagation in underground rock cavern by using 4D-LSM on TianHe-3 prototype E class supercomputer
基于天河三号原型机和4D-LSM的三维爆破波传播高性能计算
富锰，赵高峰
发布时间：2022-09-29
关键词：domain decomposition method, lattice spring model, parallel computing, wave propagation
摘要：岩土工程和地下工程的数值模拟的模型规模通常很大，并行计算有着广泛的应用。通过将数值模型的原始区域划分为多个子分区，可有效减少计算时间或内存需求，即区域分解法。本文采用立方体等体积区域分解策略，实现了基于MPI的四维格构弹簧模型（4D-LSM）分布式存储系统并行计算。本文引入了更高效的通信策略，旨在于超级计算机平台上运行10亿颗粒模型。在国家超级计算天津中心的天河3号E级超级计算原型机上进行了数值计算，运行了两个现场尺度三维爆破波传播模型，其数值结果验证了并行化4D-LSM在模拟大型三维模型中的计算能力和优势。
阅读全文 PDF 引用Influence of cooling speed on the physical and mechanical properties of granite in geothermal-related engineering
Longchuan Deng,Xiaozhao Li,Yun Wu,Fuqing Li,Zhen Huang,Yukun Ji,Chunjiang Zou,Zuxi Liu
发布时间：2022-09-29
关键词：cooling methods, granite, high temperature, physical and mechanical properties, thermal damage
摘要：It is found that more AE signals and large-scale cracks are accounted for based on the b-value method when the specimens are cooled by water. Furthermore, the microscopic observation by polarized light microscopy indicates that the density, opening degree, and connectivity of the cracks under water cooling mode are higher than that under natural cooling mode. In addition, the XRD illustrates that there is no obvious change in mineral content and diffraction angle at different temperatures, which confirms that the change of mechanical properties is not related to the chemical properties. The present conclusion can provide a perspective to assess the damage caused by different cooling methods to hot rocks.
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