检索结果-南通市图书馆

Response characteristics of gas pressure under simultaneous static and dynamic load:Implication for coal and gas outburst mechanism

引用

International Journal of Mining Science and Technology 2023年第2期33卷 155-171页

作者： Longyong Shu Liang Yuan Qixian Li Wentao Xue Nannan Zhu Zhengshuai Liu School of Energy and Mining Engineering China University of Mining and Technology-BeijingBeijing 100083China Mine Safety Technology Branch China Coal Research InstituteBeijing 100013China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science&TechnologyHuainan 232001China China Coal Research Institute Beijing 100013China

Coal and gas outbursts are dynamic disasters in which a large mass of gas and coal suddenly emerges in a mining space within a split *** interaction between the gas pressure and stress environment is one of the key factors that induce coal and gas *** this study,first,the coupling relationship between the gas pressure in the coal body ahead of the working face and the dynamic load was investigated using experimental observations,numerical simulations,and mine-site *** was observed that the impact rate of the dynamic load on the gas-bearing coal can significantly change the gas *** faster the impact rate,the speedier the increase in gas ***,the gas pressure rise was faster closer to the impact ***,based on engineering background,we proposed three models of stress and gas pressure distribution in the coal body ahead of the working face:static load,stress disturbance,and dynamic load ***,the gas pressure distribution and outburst mechanism were *** high concentration of gas pressure appearing at the coal body ahead of the working face was caused by the dynamic *** gas pressure first increased gradually to a peak value and then decreased with increasing distance from the working *** increase in gas pressure plays a major role in outburst initiation by resulting in the ability to more easily reach the critical points needed for outburst ***,the stronger the dynamic load,the greater the outburst initiation *** results of this study provide practical guidance for the early warning and prevention of coal and gas outbursts.

关键词： Coal and gas outburst Gas pressure Dynamic load outburst mechanism

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

mechanism of gas pressure action during the initial failure of coal containing gas and its application for an outburst inoculation

引用

International Journal of Mining Science and Technology 2023年第12期33卷 1511-1525页

作者： Chaojie Wang Lutan Liu Xiaowei Li Changhang Xu Kai Li Department of Safety Science and Engineering China University of Petroleum(East China)Qingdao 266580China School of Safety Engineering China University of Mining and TechnologyXuzhou 221116China

Faced with the continuous occurrence of coal and gas outburst(hereinafter referred to as“outburst”)disasters,as a main controlling factor in the evolution process of an outburst,for gas pressure,it is still unclear about the phased characteristics of the coupling process with in situ stress,which induce coal damage and ***,in the work based on the mining stress paths induced by typical outburst accidents,the gradual and sudden change of three-dimensional stress is taken as the background for the mechanical reconstruction of the disaster *** the true triaxial physical experiments are conducted on the damage and instability of coal containing gas under multiple stress ***,the response characterization between coal damage and gas pressure has been clarified,revealing the mechanism of action of gas pressure during the initial failure of *** the main controlling mechanism during the outburst process is elucidated in the coupling process of in situ stress with gas *** results show that during the process of stress loading and unloading,the original gas pressure enters the processes of strengthening and weakening the action ability *** the strengthening effect continues to the period of large-scale destruction of *** mechanical process of gas pressure during the initial failure of coals can be divided into three stages:the enhancement of strengthening action ability,the decrease of strengthening action ability,and the weakening action *** entire process is implemented by changing the dominant action of in situ stress into the dominant action of gas *** failure strength of coals is not only affected by its original mechanical strength,but also by the stress loading and unloading paths,showing a particularly significant *** stages can be divided during outburst inoculation *** is,firstly,the coals suffer from initial damage through the dominant action of in situ stress w

关键词： Coal and gas outburst outburst mechanism Main controlling mechanism Coal damage Mining stress Dilatation phenomenon

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

mechanism investigation on coal and gas outburst: An overview

引用

International Journal of Minerals,Metallurgy and Materials 2020年第7期27卷 872-887页

作者： Yan-kun Ma Bai-sheng Nie Xue-qiu He Xiang-chun Li Jun-qing Meng Da-zhao Song State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology(Beijing)Beijing 100083China Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology(Beijing)Beijing 100083China Xinjiang Institute of Engineering Urumqi 830023China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 10083China

Coal and gas outburst is a frequent dynamic disaster during underground coal mining *** about 150 years of exploration,the mechanisms of outbursts remain unclear to *** on outburst mechanisms worldwide focused on the physicochemical and mechanical properties of outburst-prone coal,laboratory-scale outburst experiments and numerical modeling,mine-site investigations,and doctrines of outburst *** mechanisms are divided into two categories:single-factor and multi-factor *** multi-factor mechanism is widely accepted,but all statistical phenomena during a single outburst cannot be explained using present *** topics about outburst mechanisms are proposed by summarizing the phenomena that need precise *** most appealing research is the microscopic process of the interaction between coal and *** physical-chemical methods can help characterize the natural properties of outburst-prone *** experiments can compensate for the deficiency of first-hand observation at the *** the original outburst scene by constructing a geomechanical model or numerical model and reproducing the entire outburst process based on mining environment conditions,including stratigraphic distribution,gas occurrence,and geological structure,are *** studies can explore outburst mechanisms at the microscale.

关键词： coal and gas outburst outburst mechanism outburst model outburst simulation microscopic pore structure

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

The Two Main mechanisms of Glacier Lake outburst Flood in Tibet,China

引用

Journal of Mountain Science 2013年第2期10卷 239-248页

作者： LIU Jing-jing TANG Chuan CHENG Zun-lan Key Laboratory of Mountain Hazards and Surface Process Institute of Mountain Hazards and EnvironmentChinese Academy of Sciences State Key Laboratory of Geohazard Preventions Graduate School of Chinese Academy of Sciences

With the global warming,the disasters of Glacier Lake outburst Flood(GLOF) have taken place frequently in Tibet in recent years and attracted more and more attention.A systematic survey was conducted on the 19 GLOFs in Tibet to study their two main *** indicated that all the events occurred in end-moraine lakes,and the outburst occurred partially and *** the breach had the shape of an arc or a trapezoid in overflow outburst and its top width was 3-5 times more than the *** two main mechanisms of GLOFs in Tibetan end-moraine Lake were overflow and piping,and the overflow mechanism caused by iceberg collapse was dominated in most cases.A formula was proposed to calculate the critical thickness of iceberg tongue that determines the *** analysis of the moraine materials revealed that seepage deformation is crucial in the outburst ***,we conducted a case study of the Guangxiecuo Lake to show its possible process of outburst and estimated the peak discharge of the resulted flood.

关键词： Glacier Lake outburst Flood End-moraine Lake outburst mechanism Overflow Piping Tibet

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

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

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

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：