界面和诱发地震活动性对覆盖层排土场边坡稳定性的影响

IF 1.1 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Current Science Pub Date : 2022-09-25 DOI:10.18520/cs/v123/i6/797-803

A. Chaturvedi, G. S. Singh

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引用次数: 3

摘要

大量上覆的废料被移走，进入深层矿床，储存在矿山附近，或最终作为回填物倾倒。由于空间限制和高剥离率，覆盖层储存在堆积场中。这些堆积场的高度和坡度都很大。本研究对总高度在60 ~ 120 m之间的排土场结构进行了界面和爆破地震荷载对其稳定性影响的参数化评价。研究表明，在界面内摩擦为20°时，随着黏聚力(10 ~ 30 kPa)的增加，边坡结构的安全系数(FoS)增大。然而，随着摩擦角从20°增加到25°，FoS的相对增幅减小。因此，摩擦角为29°时，随着黏聚力的增加，FoS保持不变。在爆破地震荷载作用下，排土场的稳定性降低。水平方向的震波比垂直方向的震波对结构的破坏更大。

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Influence of interface and induced seismicity on overburden dump slope stability

A large volume of overlying waste material is removed to access deep-seated mineral deposits and stored near mines or eventually dumped as backfill. Overburden is stored in stacked dumps due to space constraints and high stripping ratios. The height and slope of these overburden dumps are enormous. This study is a parametric evaluation of the impact of interface and blast-ing-induced seismic loading on the stability of dump structures having total heights varying between 60 and 120 m. The study reveals that for 20 ° of internal friction of the interface, a factor of safety (FoS) of the slope structure increases with increasing cohesion (10–30 kPa). However, as the friction angle increases from 20 ° to 25 ° , the relative increase in FoS is reduced. Thus FoS remains unchanged with increasing cohesion for a friction angle of 29 ° . The stability of the dump reduces when subjected to blasting-induced seismic loading. The damage is more due to the shock waves imposing seismic loading in the horizontal direction than in the vertical direction.

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来源期刊

Current Science 综合性期刊-综合性期刊

CiteScore

1.50

自引率

10.00%

发文量

审稿时长

3 months

期刊介绍： Current Science, published every fortnight by the Association, in collaboration with the Indian Academy of Sciences, is the leading interdisciplinary science journal from India. It was started in 1932 by the then stalwarts of Indian science such as CV Raman, Birbal Sahni, Meghnad Saha, Martin Foster and S.S. Bhatnagar. In 2011, the journal completed one hundred volumes. The journal is intended as a medium for communication and discussion of important issues that concern science and scientific activities. Besides full length research articles and shorter research communications, the journal publishes review articles, scientific correspondence and commentaries, news and views, comments on recently published research papers, opinions on scientific activity, articles on universities, Indian laboratories and institutions, interviews with scientists, personal information, book reviews, etc. It is also a forum to discuss issues and problems faced by science and scientists and an effective medium of interaction among scientists in the country and abroad. Current Science is read by a large community of scientists and the circulation has been continuously going up. Current Science publishes special sections on diverse and topical themes of interest and this has served as a platform for the scientific fraternity to get their work acknowledged and highlighted. Some of the special sections that have been well received in the recent past include remote sensing, waves and symmetry, seismology in India, nanomaterials, AIDS, Alzheimer''s disease, molecular biology of ageing, cancer, cardiovascular diseases, Indian monsoon, water, transport, and mountain weather forecasting in India, to name a few. Contributions to these special issues ‘which receive widespread attention’ are from leading scientists in India and abroad.