检索结果-南通市图书馆

Deformation mechanism and NPR anchor cable truss coupling support in tunnel through fault fracture zone

Journal of Mountain Science 2025年第1期22卷 354-374页

作者： HUO Shusen TAO Zhigang he manchao WANG Fengnian XU Chuang State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China

To address the issue of extensive deformation in the Tabaiyi Tunnel caused by the fault zone,nuclear magnetic resonance(NMR)technology was employed to analyze the physical and mechanical properties of waterabsorbing *** analysis aimed to understand the mechanism behind the significant *** from the principle of excavation stress compensation,a support scheme featuring NPR anchorcables and an asymmetric truss support system was *** validate the scheme,numerical analysis using a combination of the Discrete Element Method(DEM)-Finite Element Method(FEM)was ***,similar material model tests and engineering measurements were carried *** experiments were also performed to evaluate the NPR anchor-cable and truss support system,focusing on anchor cable forces,pressures between the truss and surrounding rock,pressures between the initial support and secondary lining,as well as the magnitude of settlement and convergence deformation in the surrounding *** results indicate that the waterinduced expansion of clay minerals,resulting from damage caused by fissure water,accelerated the softening of the mudstone's internal structure,leading to significant deformations in the Tabaiyi Tunnel under high tectonic *** original support design fell short as the length of the anchor rods was smaller than the expansion depth of the plastic *** a result,the initial support structure bore the entire load from the surrounding rock,and a non-coupled deformation contact was observed between the double-arch truss and the surrounding *** adoption of NPR asymmetric anchor-cable support effectively restrained the expansion and asymmetric distribution characteristics of the plastic *** the mechanical degradation caused by water absorption in mudstone,the rigid constraint provided by the truss proved crucial for controlling the stability of the surrounding *** research findings hold significant implicatio

关键词： Fault fracture zone Large deformation Nuclear magnetic resonance NPR anchor cable truss support Coupled simulation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of a multi-monitoring system and its temperature correction

引用

Journal of Mountain Science 2025年第2期22卷 681-694页

作者： LIU Songyuan YANG Peixi he manchao TAO Zhigang State Key Laboratory for Tunnel Engineering China University of Mining and Technology-BeijingBeijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology-BeijingBeijing 100083China College of Mining Engineering North China University of Science and TechnologyTangshan 063210China

The Dazu Rock Carvings in Chongqing were inscribed on the World heritage List in *** recent years,the Dazu Rock Carvings have faced environmental challenges such as geological forces,increased precipitation,pollution and tourism,which have led to rock deterioration and structural *** multi-source monitoring system for the protection of the rock carvings,based on the Internet of Things,includes Global Navigation Satellite System(GNSS)displacement monitoring,static level displacement monitoring,laser rangefinder displacement monitoring,roof pressure sensor monitoring and environmental damage *** paper analyses data from each sub-monitoring system within the multi-source monitoring system applied to Yuanjue Cave in the Dazu Rock ***,a correlation analysis between climate monitoring data and roof displacement data was carried out to assess the effect of *** on the results of the analysis,a temperature correction equation for the laser rangefinder was derived to improve the laser rangefinder displacement monitoring *** improved system was then used to monitor Cave 168,revealing the deformation and erosion patterns of the *** research results demonstrate that the multiparameter monitoring system is capable of accurately measuring and analyzing the stability of the Dazu stone carvings,as well as the effects of environmental conditions on *** use of the Internet of Things(IoT)and real-time data collection to monitor rock deformation and environmental conditions is an innovative application of technology in cultural heritage *** of the monitoring system and statistical correlation analysis of temperature and laser rangefinder data highlight the thoroughness of the methodology in this paper and its relevance to sustainable mountain *** the future,multi-source monitoring systems will have a broader application in the conservation of other UNESCO World heritage Sites.

关键词： Multi-source Monitoring System Data Fitting Dazu Rock Carvings Rock Cave Protection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact fracturing of rock-like material using carbon dioxide under different temperatures and pressures

引用

Journal of Rock Mechanics and Geotechnical Engineering 2025年第1期17卷 370-384页

作者： Shaobin Hu Zhengyong Yan Chun Zhu manchao he Shuogang Pang College of Civil and Transportation Engineering Hohai UniversityNanjing210098China Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing210098China School of Earth Sciences and Engineering Hohai UniversityNanjing210098China National Key Laboratory for Disaster Prevention Controland Intelligent Construction and Maintenance of Tunnel EngineeringChina University of Mining and Technology(Beijing)Beijing100083China School of Mechanics and Civil Engineering China University of Mining and TechnologyBeijing100083China

Unconventional resources (oil, gas, and geothermal) are often buried deep underground within dense rock strata and complex geological structures, making it increasingly difficult to create volumetric fractures through conventional hydraulic fracturing. This paper introduces a novel method of supercritical energetic fluid thermal shock fracturing. It pioneers a CO_(2) deflagration impact triaxial pneumatic fracturing experimental system, using high-strength similar materials to simulate deep, hard rock masses. The study investigates the rock-breaking process and crack propagation patterns under supercritical CO_(2) thermal shock, revealing and discussing the types of thermal shock-induced fractures, their formation conditions, and discrimination criteria. The research indicates that higher supercritical CO_(2) thermal shock pressures and faster pressure release rates facilitate the formation of radial branching fractures, circumferential cracks, and branch cracks. Typically, CO_(2) thermal shock generates 3–5 radial main cracks, which is significantly more than the single main crack formed by hydraulic fracturing. The formation of branched cracks is often caused by compression-shear failure and occurs under relatively harsh conditions, determined by the confining pressure, rock properties, peak thermal shock pressure, and the pressure sustained post-decompression. The findings are expected to offer a safe, efficient, and controllable shockwave method of supercritical fluid thermal shock fracturing for the exploitation of deep unconventional oil and gas resources.

关键词： Cracking mechanism Supercritical CO_(2) True triaxial experimental Impact fracturing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Identification of failure behaviors of underground structures under dynamic loading using machine learning

引用

Journal of Rock Mechanics and Geotechnical Engineering 2025年第1期17卷 414-431页

作者： Chun Zhu Yingze Xu manchao he Yujing Jiang Murat Karakus Lihua Hu Yalong Jiang Fuqiang Ren School of Earth Sciences and Engineering Hohai UniversityNanjing210098China State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing UniversityChongqing400044China State Key Laboratory for Geomechanics&Deep Underground Engineering Xuzhou221116China Graduate School of Engineering Nagasaki UniversityBunkyoNagasaki852-8521Japan School of Civil Environmental and Mining EngineeringThe University of AdelaideAdelaide5005SAAustralia State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure East China Jiaotong UniversityNanchang330013China School of Civil Engineering University of Science and Technology LiaoningAnshan114051China

Understanding the dynamic responses of hard rocks is crucial during deep mining and tunneling activities and when constructing nuclear waste repositories. However, the response of deep massive rocks with openings of different shapes and orientations to dynamic loading is not well understood. Therefore, this study investigates the dynamic responses of hard rocks of deep underground excavation activities. Split Hopkins Pressure Bar (SHPB) tests on granite with holes of different shapes (rectangle, circle, vertical ellipse (elliptical short (ES) axis parallel to the impact load direction), and horizontal ellipse (elliptical long (EL) axis parallel to the impact load direction)) were carried out. The influence of hole shape and location on the dynamic responses was analyzed to reveal the rocks' dynamic strengths and cracking characteristics. We used the ResNet18 (convolutional neural network-based) network to recognize crack types using high-speed photographs. Moreover, a prediction model for the stress-strain response of rocks with different openings was established using Deep Neural Network (DNN). The results show that the dynamic strengths of the granite with EL and ES holes are the highest and lowest, respectively. The strength-weakening coefficient decreases first and then increases with an increase of thickness-span ratio (h/L). The weakening of the granite with ES holes is the most obvious. The ResNet18 network can improve the analyzing efficiency of the cracking mechanism, and the trained model's recognition accuracy reaches 99%. Finally, the dynamic stress-strain prediction model can predict the complete stress-strain curve well, with an accuracy above 85%.

关键词： Dynamic mechanical response Cracking mode Hole shape/location effect Deep Neural Network(DNN) Stress-strain prediction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rock dynamics in deep mining

引用

International Journal of Mining Science and Technology 2023年第9期33卷 1065-1082页

作者： manchao he Qi Wang State Key Laboratory for Geo-mechanics and Deep Underground Engineering China University of Mining&Technology-BeijingBeijing 100083China

Rock mass dynamics disasters caused by excavations and mining occur frequently in deep *** order to establish a theoretical system and control technologies for such disasters,we first classify and define dynamic disasters,such as rock bursts,coal bursts,mine pressure bumps,and mine *** to the occurrence mechanism of different types of dynamic disasters,we establish a compensation control theory based on excavation and mining *** the basis,we propose three key technologies:high prestress compensation technology for the roadway,pressure relief technology using directional roof cutting,and the goaf filling technology using broken rock *** three technologies constitute the compensation control method for dynamic disasters in deep ***,this method was successfully applied in a deep coal mine with high stress,with monitored results suggesting its *** work provides a new concept and control method for the prevention of rock dynamic disasters in deep mines.

关键词： Rock burst Coal burst Mine pressure bump Mine earthquake Excavation compensation control Mining compensation control

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Rockburst mechanism research and its control

引用

International Journal of Mining Science and Technology 2018年第5期28卷 829-837页

作者： manchao he Fuqiang Ren Dongqiao Liu State Key Laboratory for Geomechanics & Deep Underground Engineering School of Mechanics and Civil Engineering China University of Mining & TechnologyBeijing

A new rockburst classification, innovative works in developing a ‘‘strainburst test machine" and an‘‘impact-induced rockburst test machine" that can reproduce rockbursts in laboratory were *** concepts were proposed regarding the stress paths that take into account both the static and dynamic stresses analogous to that at excavation boundaries for generating artificially-induced strainburst and impact-induced rockburst. As an important method for rockburst control, a novel energyabsorbing bolt was developed, which has a constant-resistance under both static and impact loadings and a large-elongation capacity for containing large deformations of rock masses under burst-prone conditions.

关键词： Rockburst Stress paths Energy-absorbing bolt Rockburst control

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Innovation and future of mining rock mechanics

引用

Journal of Rock Mechanics and Geotechnical Engineering 2021年第1期13卷 1-21页

作者： manchao he Qi Wang Qunying Wu Key Laboratory for Geo-mechanics and Deep Underground Engineering China University of Mining and TechnologyBeijing100083China Research Institute for Deep Underground Science and Engineering of Beijing China University of Mining and TechnologyBeijing100083China Shanbei Coal Industry Co. Ltd.Shaanxi Shanmei GroupYulin719000China

The 121 mining method of longwall mining first proposed in England has been widely used around the *** method requires excavation of two mining roadways and reservation of one coal pillar to mine one working *** to considerable excavation of roadway,the mining roadway is generally destroyed during coal *** stress concentration in the coal pillar can cause large deformation of surrounding rocks,rockbursts and other disasters,and subsequently a large volume of coal pillar resources will be *** improve the coal recovery rate and reduce excavation of the mining roadway,the 111 mining method of longwall mining was proposed in the former Soviet Union based on the 121 mining *** 111 mining method requires excavation of one mining roadway and setting one filling body to replace the coal pillar while maintaining another mining roadway to mine one working ***,because the stress transfer structure of roadway and working face roof has not changed,the problem of stress concentration in the surrounding rocks of roadway has not been well *** solve the above problems,the conventional concept utilizing high-strength support to resist the mining pressure for the 121 and 111 mining methods should be *** idea is to utilize mining pressure and expansion characteristics of the collapsed rock mass in the goaf to automatically form roadways,avoiding roadway excavation and waste of coal *** on the basic principles of mining rock mechanics,the“equilibrium mining”theory and the“short cantilever beam”mechanical model are *** technologies,such as roof directional presplitting technology,negative Poisson’s ratio(NPR)high-prestress constant-resistance support technology,and gangue blocking support technology,are developed following the“equilibrium mining”***,the 110 and N00 mining methods of an automatically formed roadway(AFR)by roof cutting and pressure releasing without pillars are *** mining metho

关键词： Mining rock mechanics Equilibrium mining theory Short cantilever beam model Automatically formed roadway without pillars Intelligent mining

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Latest progress of soft rock mechanics and engineering in China

引用

Journal of Rock Mechanics and Geotechnical Engineering 2014年第3期6卷 165-179页

作者： manchao he State Key Laboratory of Geomechanics and Deep Underground Engineering China University of Mining & Technology

The progress of soft rock mechanics and associated technology in China is basically accompanied by the development of mining engineering and the increasing disasters of large rock deformation during construction of underground engineering. In this regard, Chinese scholars proposed various concepts and classification methods for soft rocks in terms of engineering practices. The large deformation mechanism of engineering soft rocks is to be understood through numerous experiments; and thus a coupled support theory for soft rock roadways is established, followed by the development of a new support material, i.e. the constant resistance and large deformation bolt/anchor with negative Poisson’s ratio effect, and associated control technology. Field results show that large deformation problems related to numbers of engineering cases can be well addressed with this new technology, an effective way for similar soft rock deformation control.

关键词： Rock mechanicsSoft rock engineeringLarge deformation failureDeformation mechanismControl countermeasures

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Excavation compensation theory and supplementary technology system for large deformation disasters

引用

Deep Underground Science and Engineering 2023年第2期2卷 105-128页

作者： manchao he Qiru Sui Zhigang Tao State Key Laboratory for GeoMechanics and Deep Underground Engineering China University of Mining and Technology(Beijing)BeijingChina School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)BeijingChina Institute for Deep Underground Science and Engineering China University of Mining and Technology(Beijing)BeijingChina

Given the challenges in managing large deformation disasters in energy engineering,traffic tunnel engineering,and slope engineering,the excavation compensation theory has been proposed for large deformation disasters and the supplementary technology system is developed *** theory is based on the concept that“all destructive behaviors in tunnel engineering originate from excavation.”This paper summarizes the development of the excavation compensation theory in five aspects:the“theory,”“equipment,”“technology,”the design method with large deformation mechanics,and engineering ***,the calculation method for compensation force has been developed based on this theory,and a comprehensive large deformation disaster control theory system is ***,a negative Poisson's ratio anchor cable with high preload,large deformation,and super energy absorption characteristics has been independently developed and applied to large deformation disaster *** intelligent tunnel monitoring and early warning cloud platform system are established for remote monitoring and early warning system of Newton force in landslide geological ***,the double gradient advance grouting technology,the two-dimensional blasting technology,and the integrated Newton force monitoring--early warning--control technology are developed for different engineering ***,some applications of this theory in China's energy,traffic tunnels,landslide,and other field projects have been analyzed,which successfully demonstrates the capability of this theory in large deformation disaster control.

关键词： energy engineering excavation compensation large deformation NPR anchor cable slope engineering traffic tunnel engineering

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

State of the art review of the large deformation rock bolts

引用

Underground Space 2022年第3期7卷 465-482页

作者： Qiru Sui manchao he Pengfei he Min Xia Zhigang Tao State Key Laboratory for GeoMechanics and Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China Institute for Deep Underground Science and Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Mechanics and Civil Engineering China University of Mining and Technology(Beijing)Beijing 100083China

Rock bolting technique is an important reinforcement measure in the geotechnical engineering *** rock bolts have been continuously emerging through the development of rock supporting *** conditions,such as high crustal stress,extremely soft rock,and strong mining disturbance often occur in the deep mining,resulting in large deformation of the surrounding rock *** the deformation of traditional rock bolts is generally below 200 mm,failure often occurs to the rock bolts because of insufficient *** effectively control the large deformation of surrounding rock masses caused by complex conditions,it is necessary to develop large deformation rock bolts with high constant resistance,also called energy-absorbing *** paper systematically reviews the development of large deformation rock bolts and the structure,energy absorption mechanism,anchorage performance,and mechanical properties of several typical large deformation rock *** advantages and disadvantages of existing large deformation rock bolts are compared and the concept of constant resistance large deformation support is introduced.

关键词： Rock bolt Energy absorbing Constant resistance Large deformation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：