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- Science China Press., Co. Ltd.
- Publication date
- 01/02/1998
- Field of study
No full text
- Publication venue
- Science China Press., Co. Ltd.
- Publication date
- 01/12/2008
- Field of study
No full text
- Publication venue
- Science China Press., Co. Ltd.
- Publication date
- 01/09/2002
- Field of study
No full text
- Publication venue
- Science China Press., Co. Ltd.
- Publication date
- 01/07/2000
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No full text
- Publication venue
- 'Science China Press., Co. Ltd.'
- Publication date
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No full text
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- Publication date
- 15/01/2020
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No full text本文利用连续-非连续单元法(CDEM),采用应变软化模型和朗道爆源模型,对爆破作用下露天边坡的动力响应进行了直接模拟。研究了单孔爆破作用下后方岩体的破坏特征,探讨了爆破距离对边坡稳定性的影响规律。结果表明,爆破作用下后方岩体主要发生拉伸损伤破坏,破坏区域形状为一受控于临空面及爆破平台表面的椭球体,单孔爆破作用下对后方岩体的影响区域为10m ~ 15m。随着爆破距离的减小,边坡表面的振动合速度呈线性增大趋势
- Publication venue
- Publication date
- 01/01/2008
- Field of study
No full text
- Publication venue
- Publication date
- 01/01/2005
- Field of study
No full text
- Publication venue
- Publication date
- 01/01/2007
- Field of study
No full text
- Publication venue
- Publication date
- 01/06/2017
- Field of study
No full text对渤海中部油气开采区表层沉积物中的石油烃含量进行了环境质量评价,分析了正构烷烃和多环芳烃分子组成特征,并对其来源进行了解析.结果表明,石油类浓度为12.5—860 μg/g之间,污染指数为0.61—41.97;随着与采油平台距离的增加,平台周边海域石油烃含量和污染水平呈现降低的趋势;沉积物沉积时为缺氧还原的沉积环境.正构烷烃的分布特征和甾萜烷生物标志化合物表明,源自大陆高等植物和海洋浮游生物的烷烃共存于渤海近代沉积物中,石油类产品和化石燃料燃烧产物对其贡献不能忽视;石油平台站位PAHs主要来自石油的直接输入,其它站位主要来自燃烧源。</p