检索结果-南通市图书馆

Discussions on rockburst and dynamic ground support in deep mines

Journal of Rock Mechanics and Geotechnical Engineering 2019年第5期11卷 1110-1118页

作者： Charlie C.Li Peter Mikula brad simser Bruce Hebblewhite William Joughin Xiaowei Feng Nuwen Xu Norwegian University of Science and Technology (NTNU) Trondheim Norway Mikula Geotechnics Pty. Ltd. Kalgoorlie Australia Glencore Company Sudbury Canada The University of New South Wales (UNSW) Sydney Australia SRK Consulting Johannesburg South Africa China University of Mining and Technology Xuzhou China Sichuan University Chengdu China

The paper is a summary of discussions on four topics in rockburst and dynamic ground *** 1 is the mechanisms of *** events are classified into two categories in accordance with the triggering mechanisms,*** burst and fault-slip *** burst occurs on rock surfaces when the tangential stress exceeds the rock strength in hard and brittle ***-slip burst is triggered by fault-slip induced *** 2 is prediction and forecasting of rockburst *** for a rockburst event must tell the location,timing and magnitude of the *** could simply foresee the probability of some of the three *** is extremely challenging to predict rockbursts and large seismic events with current knowledge and technologies,but forecasting is possible,for example the possible locations of strain burst in an underground *** present,the approach using seismic monitoring and numerical modelling is a promising forecasting *** 3 is preconditioning *** current preconditioning methods are blasting,relief-hole drilling and *** fault-slip seismicity is difficult and challenging but has been *** very deep locations(>3000 m),the fracturing could extend from the excavation face to a deep location ahead of the face and therefore preconditioning is usually not *** 4 is dynamic ground support against *** ground support requires that the support system be strong enough to sustain the momentum of the ejecting rock on one hand and tough enough on the other hand to absorb the strain and seismic energies released from the rock *** current dynamic support systems in underground mining are composed of yielding tendons and flexible surface retaining elements like mesh/screen and *** props and engineered timber props are also used for dynamic support.

关键词： Rockburst Seismic event Dynamic ground support Forecasting Preconditioning

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 management in Canadian hard rock mines

引用

Journal of Rock Mechanics and Geotechnical Engineering 2019年第5期11卷 1036-1043页

作者： B.P.simser Glencore’s Sudbury Integrated Nickel Operations

Rockburst is a complex mining-induced phenomenon that remains difficult to be *** particular,geological conditions contributing to rockbursts are more variable than those in many conventional engineering ***,intact rock properties,and other rock mass conditions vary,sometimes,within small *** levels that store energy or drive structures can change with geological *** example,faults may channel stress between the void and the discontinuity,and/or alter the local stress ***-strength rock masses may be very massive at shallow depth,allowing for large/stable *** same rock type may store excessive strain energy at depth or high mineral extraction,and lead to *** robust ground support systems that can bear dynamic loading are now commonplace in mining industry.A typical approach would be able to evaluate rockburst potential,and selectively deploy more robust ground support *** resistant support is more expensive in installation than most support systems designed for gravity ***,an excessively conservative risk assessment can affect both direct support costs and *** mines continue to go deeper,selective use of burst-prone support may not be an optimal choice,and pervasive installation may become *** implies a need to maintain a reasonable installation speed,and the time to get to deep orebodies is a major economic *** paper shows field examples of rockbursts to highlight some of the complex issues related to the rockburst.A multi-tiered risk mitigation approach is used for rockburst *** of risk reduction strategies are given and some examples from a deep hard rock mine are used to illustrate the relative success of the *** that some residual risks to worker safety remain,discussion is presented on where more research or process improvements would be beneficial.

关键词： Rockburst Dynamic support Seismic monitoring

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

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

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：