Zoning Evaluation of Geological Hazard in YuLin Coal Mining Area

2012 ◽  
Vol 599 ◽  
pp. 245-249
Author(s):  
Jian Long Yan ◽  
Jun Wang ◽  
Shi Jie Song ◽  
Zhi Hai Zhao
Keyword(s):  
Large Scale ◽  
Mining Area ◽  
Ground Subsidence ◽  
Disaster Prevention ◽  
Coal Resources ◽  
Coal Mining Area ◽  
Geological Disasters ◽  
Damage Degree ◽  
Geological Disaster ◽  
The City

As an important exporter of coal resources in China, Yulin has made great contribution to the repaid development of the national economy. But, the geological disaster item caused by large-scale exploitation of coal resources is becoming more and more serious. On the basis of county geological disaster investigation data in Yulin, the research analyzes and summarizes the type, scope, damage degree of the geological disaster in the whole city, especially coal area qualitatively and quantitatively. The article makes clear the spatial distribution of geological disasters in Yulin and it hope that the work can provide scientific guidance to geological disaster prevention in the future. By the research, we get several results as follow: first, There are 905 geological disasters points in Yulin and the mainly the types of all are Collapse, Landslide, Debris Flow, Unstable Slopes, and Ground Subsidence; Second, Collapse and Landslide are the major geological disasters type, and Ground Subsidence is the most serious hazard type in Yulin although its number is small. Third, according to the result above, the city has been divided into different geological disaster-prone areas with MAPGIS, and there are 11 high geological disaster-prone areas, 12 middle, 8 low and 3 undeveloped areas.

scholarly journals Quantifying Horizontal and Vertical Movements in Ho Chi Minh City by Sentinel-1 Radar Interferometry

2020 ◽  
Author(s):  
Dinh Ho Tong Minh ◽  
Yen-Nhi NGO ◽  
Thu Trang Lê ◽  
Trung Chon Le ◽  
Hong Son Bui ◽  
...  
Keyword(s):  
Time Series ◽  
Large Scale ◽  
European Space Agency ◽  
Ground Subsidence ◽  
Ho Chi Minh City ◽  
Vertical Movements ◽  
Space Agency ◽  
Permanent Scatterers ◽  
The City ◽  
East West

Ho Chi Minh City (HCMC), the most populous city and the economic center of Viet Nam, has faced ground subsidence in recent decades. This work aims at providing an unprecedented spatial extent coverage of the subsidence in HCMC in both horizontal and vertical components using Interferometric Synthetic Aperture Radar (InSAR) time series. For this purpose, an advanced InSAR technique PSDS (Permanent Scatterers and Distributed Scatterers) was applied to two big European Space Agency (ESA) Sentinel-1 datasets composed of 96 ascending and 202 descending images, acquired from 2014 to 2020 over HCMC area. A time series of 33 Cosmos SkyMED images was also used for comparison purpose. The combination of ascending and descending satellite passes allows the decomposition of the light of sight velocities into horizontal East-west and vertical components. By taking into account the presence of the horizontal East-west movement, our finding indicates that the precision of the decomposed vertical velocity can be improved up to 3 mm/year for Sentinel-1 data. The obtained results revealed that subsidence is most severe in areas along the Sai Gon river in the northwest-southeast axis and the southwest of the city with the maximum value up to 80 mm/year, consistent with findings in the literature. The magnitude of horizontal East-West velocities is relatively small and a large-scale westward motion can be observed in the northwest of the city at a rate of 2-5 mm/year. Together, these results reinforced the remarkable suitability of ESA's Sentinel-1 SAR for subsidence applications even for non-Europe countries such as Vietnam and Southeast Asia.

scholarly journals Extraction of Irregularly Shaped Coal Mining Area Induced Ground Subsidence Prediction Based on Probability Integral Method

2020 ◽  
Vol 10 (18) ◽  
pp. 6623
Author(s):  
Xianfeng Tan ◽  
Bingzhong Song ◽  
Huaizhi Bo ◽  
Yunwei Li ◽  
Meng Wang ◽  
...  
Keyword(s):  
Coal Mining ◽  
Integral Method ◽  
Mesh Size ◽  
Mining Area ◽  
Ground Subsidence ◽  
Data Set ◽  
Coal Mining Area ◽  
Subsidence Prediction ◽  
Probability Integral Method ◽  
Probability Integral

Underground coal mining-induced ground subsidence (or major ground vertical settlement) is a major concern to the mining industry, government and people affected. Based on the probability integral method, this paper presents a new ground subsidence prediction method for predicting irregularly shaped coal mining area extraction-induced ground subsidence. Firstly, the Delaunay triangulation method is used to divide the irregularly shaped mining area into a series of triangular extraction elements. Then, the extraction elements within the calculation area are selected. Finally, the Monte Carlo method is used to calculate extraction element-induced ground subsidence. The proposed method was tested by two experimental data sets: the simulation data set and direct leveling-based subsidence observations. The simulation results show that the prediction error of the proposed method is proportional to mesh size and inversely proportional to the amount of generated random points within the auxiliary domain. In addition, when the mesh size is smaller than 0.5 times the minimum deviation of the inflection point of the mining area, and the amount of random points within an auxiliary domain is greater than 800 times the area of the extraction element, the difference between the proposed method-based subsidence predictions and the traditional probability integral method-based subsidence predictions is marginal. The measurement results show that the root-mean-square error of the proposed method-based subsidence predictions is smaller than 3 cm, the average of absolute deviations of the proposed method-based subsidence predictions is 2.49 cm, and the maximum absolute deviation is 4.05 cm, which is equal to 0.75% of the maximum direct leveling-based subsidence observation.

Analysis of ground subsidence at a coal-mining area in Huainan using time-series InSAR

2015 ◽  
Vol 36 (23) ◽  
pp. 5790-5810 ◽  
Author(s):  
Zhengjia Zhang ◽  
Chao Wang ◽  
Yixian Tang ◽  
Hong Zhang ◽  
Qiaoyan Fu
Keyword(s):  
Time Series ◽  
Coal Mining ◽  
Mining Area ◽  
Ground Subsidence ◽  
Coal Mining Area

Use of D-InSAR Technique for Monitoring Ground Subsidence in the Yanzhou Coal Mining Area (China)

2010 ◽  
Vol 34-35 ◽  
pp. 756-760 ◽  
Author(s):  
Zhi Yong Wang ◽  
Jin Zhi Zhang
Keyword(s):  
Coal Mining ◽  
Mining Area ◽  
Mining Subsidence ◽  
Ground Subsidence ◽  
Srtm Dem ◽  
Alos Palsar ◽  
Coal Mining Area ◽  
L Band

In this paper, it monitored ground subsidence in the coal mining area using two-pass D-InSAR technique. We obtained 9 ALOS PALSAR single-look complex (SLC) images in Yanzhou coal mining area from December 2007 to Februay 2009. Based on SAR interferometric pairs and SRTM DEM, we detected the subsided areas and got the vertical subsided quantity. We got the ground subsidence maps in different stages from 2007 to 2009. Several important subsided areas were selected and then analyzed in detail. It analyzed the general laws of mining subsidence. The results indicated that two-pass D-InSAR technique based on L-band PALSAR data and SRTM DEM is a very simple, rapid and efficient way to detect and to monitor ground subsidence in the coal mining area, even in the areas with vegetation covered.

scholarly journals Exploring Mine Engineering Geological Prospecting and Geological Disaster Control Countermeasures

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Te Liu
Keyword(s):  
Control System ◽  
Industrial Production ◽  
Raw Materials ◽  
Mineral Resources ◽  
Disaster Prevention ◽  
Geological Exploration ◽  
Geological Disasters ◽  
Geological Disaster ◽  
Disaster Control

Over the years, China's mining efforts of mineral resources has been continuously strengthened, and more and more complex mining has been mined by people, providing a large number of raw materials for China's industrial production. However, because some mines are loose managed and there is no unified control system, many mines may cause safety problems and even geological disasters in the process of mining. By analyzing the mine geological exploration work, it gives some disaster prevention countermeasures, hoping to provide some help to the mine exploration and mining.

GIS-Based Alerting and Control System Design of Geological Disaster in Jiangxi Province

2012 ◽  
Vol 260-261 ◽  
pp. 1236-1241
Author(s):  
Xiao Fang Zu ◽  
Xian Gang Luo ◽  
Jin Luo
Keyword(s):  
Prevention And Control ◽  
Dynamic Assessment ◽  
Jiangxi Province ◽  
Scientific Management ◽  
Disaster Prevention ◽  
Geological Disasters ◽  
Time Space ◽  
Geological Disaster ◽  
And Control

This paper combines the management and prevention of geological disasters through network technology to design the management and prevention platform of geological disasters in Jiangxi Province, which achieves the electronization of the organizational structure and workflow of geological disasters prevention and control on the Internet. This platform breaks the limitations of time, space and departmental separation and promotes geological disaster prevention and management to the level of continuous accumulation, scientific management and rational utilization. Also, Geological disaster prevention and control enters a healthy circulation of dynamic assessment, rapid response, remote consultation and emergency command. The system provides all-rounded high quality, transparent and efficient Web service of geological disaster Alerting, prediction, prevention and management information, achieving the purpose of improving the efficiency and quality of geological disaster prevention and management.

scholarly journals Numerical Simulation Study of the Strata Movement Rule of Deep Mining with the Super-Thick and Weak Cementation Overburden: A Case Study in China

2021 ◽  
Vol 2021 ◽  
pp. 1-20
Author(s):  
Guojian Zhang ◽  
Guangli Guo ◽  
Shikai Shen ◽  
Qingkun Guo ◽  
Sifeng Zhang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Large Scale ◽  
Eastern China ◽  
Critical Role ◽  
Mining Area ◽  
Central China ◽  
Maximum Difference ◽  
Surface Movement ◽  
Strata Movement ◽  
Coal Resources

As the national energy strategy is to mine westward, the deep coal resources under the super-thick and weak cementation overburden in the western mining area will play a critical role in China’s sustainable economic growth. The super-thick and weak cementation overburden has weaker lithology, thicker strata, no large joints, bedding development, and better integrity. Therefore, its movement rule is inevitably different from that of the weak overburden and the middle hard overburden in Central China and Eastern China. However, lack of studies on the movement of the super-thick and weak cementation overburden has led to severe constraints for the large-scale exploitation of coal resources under the super-thick and weak cementation overburden in the western mining area. This study explored the surface movement rule and the influence of overburden characteristics on strata movement with field measurement and numerical simulation. The findings indicate that the surface reaches full mining and the subsidence coefficient is about 0.9 when D1 (width in the dip direction) and D3 (length in the strike direction) are 3 times H0 (the mean mining depth) or more. The strike mining degree has a certain influence on the surface movement law, the maximum difference of the surface subsidence coefficient is 0.35, and the maximum difference of the horizontal movement coefficient is 0.05. In addition, the control effect of the Zhidan group sandstone is stronger. Thus, its first breaking results in surface sinking in a fractured manner when D1 is about 1.3 times H0 and D3 is 3 times H0 or more. The above results can provide reference for the safe mining and control of the super-thick weak cementation overburden.

scholarly journals Measuring ground subsidence in Hanoi city by radar interferometry

2016 ◽  
Vol 19 (2) ◽  
pp. 122-129 ◽  
Author(s):  
Dinh Tong Dinh Ho ◽  
Cuong Quoc Tran ◽  
Anh Duc Nguyen ◽  
Thuy Le-Toan
Keyword(s):  
Large Scale ◽  
Sar Interferometry ◽  
Ground Subsidence ◽  
Silt Loam ◽  
Groundwater Extraction ◽  
Remote Sensing Technique ◽  
Multi Temporal ◽  
The City ◽  
Temporal Coverage ◽  
Good Agreement

The rapidly developing urbanization since the last decade of the 20th century leads to the strong groundwater extraction, resulting in the subsidence phenomena in the Hanoi, Vietnam. Recent advances in the multi-temporal spaceborne SAR interferometry, especially with Persistent Scatters Interferometry (PSI) approach, is the robust remote sensing technique for measuring ground subsidence in large scale with millimetric accuracy. This work has presented an advanced PSI analysis, to provide unprecedented spatial extent and continuous temporal coverage of the subsidence in Hanoi City. The correlation between the reference leveling velocity and the estimated PSI result is R2 = 0.86, and the root mean square error is 4.0 (mm/year), confirming their good agreement. The study shows that subsidence is most severe in the Haihung silt loam areas in the south of the city. The groundwater extraction resulting from urbanization and urban growth is mainly responsible for the subsidence.

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