检索结果-南通市图书馆

New developments of technology in rock engineering in China

在线全文

学校读者我要写书评

暂无评论

engineering Sciences 2012年第2期10卷 2-15页

作者： Qian Qihu PLA University of Science and Technology Nanjing 210007 China

In terms of rock engineering and technology in hydropower construction,the slope stability and monitoring techniques for high slopes of Three Gorges Project,the stability and support technology for high slopes of hydropower projects in deep river valley,the stabilization techniques for underground cavern group with large span and high side walls are introduced in this *** for rock engineering and technology in highway and railway construction,the Qinghai-Tibet Railway — new construction techniques in permafrost,the support techniques for large squeezing deformation in Wuqiaoling Tunnel,the construction techniques for tunnels in alpine and high-altitude region,the geological prediction techniques for tunnels in karst region,the microseismic monitoring and early warning techniques for rockbursts in deep and long tunnels are *** rock engineering and technology inmining engineering,the innovative techniques for roadway support inmines,the simultaneous extraction technique of pillarless coal and gas in coal seams with low permeability,the safe and efficient deep openmining technology,advances in monitoring,early warning and treatment ofmine dynamic disasters are *** addition,the new anchorage techniques and precision blasting technique in rock engineering are introduced.

关键词： rock engineering hydropower engineering tunnel engineering mining engineering anchorage technique blasting technique

Design methodology for the safety of underground rock engineering

在线全文

学校读者我要写书评

暂无评论

Journal of rock Mechanics and Geotechnical engineering 2012年第3期4卷 205-214页

作者： John A. Hudson Department of Earth Science and engineering Imperial College of Science Technology and MedicineLondon UK rock engineering Consultants Welwyn Garden City UK

In order to optimise the safety of underground rock engineering construction and the long-term security of the resultant facilities, it is necessary to have a knowledge of the likely hazards. These risks or hazards fall into the four categories of 'known beforehand and relatively easily addressed', 'known beforehand and not easily addressed', 'not known beforehand and relatively easily addressed', and 'not known beforehand and not easily addressed'. This paper describes how these four types of hazard can be incorporated into a design methodology approach, including the process by which the relevant mechanical rock mass parameters can be recognised for modelling and hence predictive purposes. In particular, there is emphasis on the fact that information and judgement are the keys to safety——whether the hazards are known or unknown before construction proceeds.

关键词： rock mechanics rock engineering design safety information

An Innovative Non-Pillar Coal-Mining Technology with Automatically Formed Entry: A Case Study

在线全文

学校读者我要写书评

暂无评论

engineering 2020年第11期6卷 1315-1329页

作者： Xingyu Zhang Manchao He Jun Yang Eryu Wang Jiabin Zhang Yue Sun State Key Laboratory for Geomechanics and Deep Underground engineering China University of Mining and TechnologyBeijing 100083.China School of Mechanics and Civil engineering China University of Mining and TechnologyBeijing 100083China Department of Civil Environmental and Architectural EngineeringUniversity of ColoradoBoulderCO 80309USA Institute of Mining Research Inner Mongolia University of Science and TechnologyBaotou 014010China

A non-pillar coal-mining technology with an automatically formed entry is proposed,which reduces the waste of coal resources and the underground entry drivage *** key techniques in this technology cooperate to achieve automatic formation and retaining of the gob-side entry,and to realize nonpillar ***-resistance large deformation(CRLD)support ensures the stability of the entry roof;directional presplitting blasting(DPB)separates the entry roof and the gob roof;and a blockinggangue support system(BGSS)integrates the caved rock material as an effective entry *** industrial test was conducted to verify the engineering effects of these key *** field application results showed that the retained entry was under the pressure-relief zone due to the broken-expansion nature of the caved rock mass within the DPB *** going through a provisional dynamic pressure-bearing zone,the retained entry entered the stability *** final stable entry meets the requirements of safety and *** research results demonstrate the good engineering applicability of this *** taking the framework of the technology design principles into consideration and adjusting the measures according to different site conditions,it is expected that the proposed non-pillar coal-mining technology can be popularized on a large scale.

关键词： Non-pillar mining Entry support Retained entry rock engineering Industrial test

Assessment of nano-to-micro-scale geomechanical properties and their time-dependent behavior: Current status and progressive perspectives

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 Mechanics Bulletin

rock Mechanics Bulletin 2024年第1期3卷 1-15页

作者： Mary C.Ngoma Oladoyin Kolawole John A.Reif Jr.Department of Civil and Environmental EngineeringNew Jersey Institute of TechnologyNewarkNJ07102USA

rocks can deform at varying scales(nano-,micro-and macro-scale)under different temperatures,pressures,stresses,and time ***-core scale(nano-to micro-scale)changes in rock properties can influence local(fine-scale)and bulk scale(macro-scale)rock ***,there is a lack of comprehensive knowledge on how rock deformation at sub-core scale(i.e.,nano-to micro-scale)is assessed and its potential to accurately predicte and estimate the macro-scale mechanical behavior of *** study presents a comprehensive and forward-leaning review of the assessment of nano-scale and micro-scale rock mechanical parameters,their timedependent behavior,and potential applications in rock ***,we highlighted the key findings based on experimental and numerical methods for evaluating rock mechanical parameters,and presented the limitations of these ***,we discussed the reliability of sub-core scale mechanical assessments in predicting macromechanical(larger-scale)properties and the behavior of rocks in ***,we offer recommendations to advance investigations focused on rock mechanical assessments at these smaller scales and provide a more accurate characterization at the sub-core scale.

关键词： rock mechanics rock deformation Nanomechanics rock creep rock engineering

Design,construction and mechanical behavior of relics of complete large Longyou rock caverns carved in argillaceous siltstone ground

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

Journal of rock Mechanics and Geotechnical engineering 2011年第2期3卷 131-152页

作者： Zhifa Yang1, Zhongqi Yue2, Lihui Li1 1 Key Laboratory of engineering Geomechanics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China 2 Department of Civil engineering, the University of Hong Kong, Hong Kong, China Key Laboratory of engineering Geomechanics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Department of Civil engineering the University of Hong Kong Hong Kong China

This paper presents a comprehensive summary of data, analyses and findings from the investigations over the past twelve years about the relics of large Longyou rock caverns carved about 2 000 years ago at shallow depths in argillaceous siltstone. The paper presents the typical features associated with the rock caverns. They include structures, large spans, portals, extreme shallow-buried depths, imprints, drainages, inclined ceiling, inclined sidewalls, slender rock pillars, rock staircases, site and strata selections, caving lighting, carving method, and underground construction surveying. They are used to reconstruct and highlight the design and construction methods adopted by the ancients. The paper further demonstrates that the relics of the complete large rock caverns are a consequence of coincidental combinations of ancient human effort and natural factors. The full occupation of water with weak acidity in the large rock caverns with the soft surrounding rocks of weak alkalinity is found to be the main factor ensuring and preserving the caverns to have been stable and integral over 2 000 years. However, the five unwatered complete rock cavern relics have been experiencing various deteriorations and small failures including cracks, seepage, small rock falls and delaminating ceiling rocks. Although these deteriorations have been repaired and stabilized effectively, the paper demonstrates that an entire roof collapse failure is highly possible in the near future to each of the five unwatered rock cavern relics. The findings presented in this paper are also invaluable both to the long-term protection and preservation of the large rock cavern relics of national and international interests and importance, and to extend and enrich our experience and knowledge on the long-term stability and integrity of man-made underground rock cavern engineering projects.

关键词： rock cavern rock mechanics rock engineering long-term stability and integrity argillaceous siltstone environment

Design,construction and mechanical behavior of relics of complete large Longyou rock caverns carved in argillaceous siltstone ground

在线全文

学校读者我要写书评

暂无评论

Design,construction and mechanical behavior of relics of com...