Analysis of Present Tectonic Stress and Regional Ground Fissure Formation Mechanism of the Weihe Basin

Survey Review ◽  
2011 ◽  
Vol 43 (322) ◽  
pp. 382-389 ◽  
Author(s):  
Q. Zhang ◽  
W. Qu ◽  
Q.L. Wang ◽  
J.B. Peng ◽  
J. Drummond ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Tectonic Stress ◽  
Ground Fissure ◽  
Weihe Basin ◽  
Fissure Formation

A Study on the Formation Mechanism and Preventive Measures of Coal-Mining Ground Fissures in the South-West of Pingyao

2011 ◽  
Vol 90-93 ◽  
pp. 1341-1344 ◽  
Author(s):  
Chang Song Zhou ◽  
Xiu Qing Zheng ◽  
Li Yuan Zheng ◽  
Xiao Ou Wei
Keyword(s):  
Coal Mining ◽  
Formation Mechanism ◽  
Mining Area ◽  
Control Measures ◽  
Systematic Analysis ◽  
Ground Fissure ◽  
Ground Fissures ◽  
Basic Characteristics ◽  
Prevention And Control Measures ◽  
Groundwater Drainage

According to the basic characteristics of geological environment in Pingyao mining area, we analyzed the relationship between coal mining and the ground fissure disasters in recent years. The result shows that the mine goaf is the essential factor for the formation of ground fissure, and the precipitation and groundwater drainage accelerates its development. Based on a systematic analysis of classification of goaf as well as the distribution characteristics and the formation mechanism of ground fissure, we found that the ground fissure in this area is non-tectonic, and thus proposed corresponding prevention and control measures. Research results would provide basis for the improvement of local environmental conditions and the control of geological disasters.

Mechanism of Fuping ground fissure in the Weihe Basin of northwest China: fault and rainfall

2019 ◽  
Vol 78 (14) ◽  
Author(s):  
Feiyong Wang ◽  
Jianbing Peng ◽  
Quanzhong Lu ◽  
Yuxiang Cheng ◽  
Zhenjiang Meng ◽  
...  
Keyword(s):  
Northwest China ◽  
Ground Fissure ◽  
Weihe Basin

Characteristics and formation mechanism of the Yangjiazhuang-Maguduo ground fissure, western Linfen Basin, Northern China

2021 ◽  
pp. 105043
Author(s):  
Junyan Zhao ◽  
Cong Liu ◽  
Jianbing Peng ◽  
Jianwei Qiao ◽  
Zhenjiang Meng ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Northern China ◽  
Ground Fissure

Research on Formation Mechanism of Deep Cracks in Left Bank Slope of Jinping First Stage Hydropower Station Based on DDA Method

2012 ◽  
Vol 170-173 ◽  
pp. 1966-1970
Author(s):  
Shao Rui Sun ◽  
Chang Quan Gao ◽  
Jia Ming Liu ◽  
Ye Xu Lu ◽  
Pen Lei Xu
Keyword(s):  
Formation Mechanism ◽  
Horizontal Stress ◽  
Tectonic Stress ◽  
River Valley ◽  
Hydropower Station ◽  
Left Bank ◽  
Tension Crack ◽  
High Slope ◽  
Deep Crack ◽  
Dda Method

Deep crack of high slope in the deep-cutting canyon region is a special geological phenomenon which exists in hydropower engineering in the west of China. High steep rock slopes are usually chosen as action sites of dam abutment. However, many deep cracks are often discovered in the depth of these high slopes. And irrefutably deep cracks greatly influence the stability of the engineering. By taking the deep cracks of left bank in Jinping I hydropower station as an example, formation mechanism of deep crack in high slope is partially revealed in this paper. Deep cracks were result of release of high geo-stress including body stress and tectonic stress when external environmental condition changed (such as river valley deep-cutting). Geometry and mechanics characteristics of discontinuous are internal factors result in the formation of deep cracks; deep cracks maybe have stepped-up process when combination of discontinuous is unfavorable; and intense release of high geo-stress caused by valley deep-cutting is external factor. In this paper, different combination of discontinuous was analyzed, and the formation process of deep cracks was simulated by DDA method. It concludes that the formation of deep cracks go through a series of complex process including river valley stress concentration caused by intense unloading - the high slope tension crack caused by horizontal stress release- part of the tension crack rock mass generates shear-tension crack downward along the slope under gravity”, etc. Research on this subject is a theory support for excavation and reinforcement of high slope where deep cracks exist.

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