Dynamic monitoring of land desertification in coal mining districts in the north of Shaanxi Province

2017 ◽  
pp. 219-221
Author(s):  
H. Yue
Keyword(s):  
Coal Mining ◽  
Shaanxi Province ◽  
Dynamic Monitoring ◽  
The North ◽  
Land Desertification ◽  
Mining Districts

scholarly journals Monitoring and Analysis of Dynamic Characteristics of Super High-rise Buildings using GB-RAR: A Case Study of the WGC under Construction, China

2020 ◽  
Vol 10 (3) ◽  
pp. 808 ◽  
Author(s):  
Lv Zhou ◽  
Jiming Guo ◽  
Xuelin Wen ◽  
Jun Ma ◽  
Fei Yang ◽  
...  
Keyword(s):  
Wavelet Analysis ◽  
Dynamic Characteristics ◽  
Horizontal Displacement ◽  
Dynamic Monitoring ◽  
High Rise ◽  
The North ◽  
Study Results ◽  
Under Construction ◽  
East West

Accurate dynamic characteristics of super high-rise buildings serve as a guide in their construction and operation. Ground-based real aperture radar (GB-RAR) techniques have been applied in monitoring and analyzing the dynamic characteristics of different buildings, but only few studies have utilized them to derive the dynamic characteristics of super high-rise buildings, especially those higher than 400 m and under construction. In this study, we proposed a set of technical methods for monitoring and analyzing the dynamic characteristics of super high-rise buildings based on GB-RAR and wavelet analysis. A case study was conducted on the monitoring and analysis of the dynamic characteristics of the Wuhan Greenland Center (WGC) under construction (5–7 July 2017) with a 636 m design height. Displacement time series was accurately derived through GB-RAR and wavelet analysis, and the accuracy reached the submillimeter level. The maximum horizontal displacement amplitudes at the top of the building in the north–south and east–west directions were 18.84 and 15.94 mm, respectively. The roof displacement trajectory of the WGC was clearly identified. A certain negative correlation between the temperature and displacement changes at the roof of the building was identified. Study results demonstrate that the proposed method is effective for the dynamic monitoring and analysis of super high-rise buildings with noninvasive and nondestructive characteristics.

scholarly journals Comprehensive Insights into Spatial-Temporal Evolution Patterns, Dominant Factors of NDVI from Pixel Scale, as a Case of Shaanxi Province, China

2021 ◽  
Vol 18 (19) ◽  
pp. 10053
Author(s):  
Hongliang Gu ◽  
Min Chen
Keyword(s):  
Vegetation Indices ◽  
Geographic Location ◽  
Boosted Regression Trees ◽  
Shaanxi Province ◽  
Location Factors ◽  
Annual Average ◽  
Spatial Continuity ◽  
The North ◽  
Driving Mechanisms ◽  
Pixel Scale

Based on long term NDVI (1982–2015), climate, topographic factors, and land use type data information in Shaanxi Province, multiple methods (linear regression, partial and multiple correlation analysis, redundancy analysis and boosted regression trees method) were conducted to evaluate the spatial-temporal change footprints and driving mechanisms in the pixel scale. The results demonstrated that (1) the overall annual average and seasonal NDVI in this region showed a fluctuating upward trend, especially in spring. The difference between the end of season (eos) and start of season (sos) gradually increased, indicating the occurrence of temporal “greening” across most Shaanxi Province. (2) The overall spatial distribution of annual mean NDVI in Shaanxi Province was prominent in the south and low in the north, and 98.83% of the areas had a stable and increasing trend. Pixel scale analysis reflected the spatial continuity and heterogeneity of NDVI evolution. (3) Trend and breakpoint evaluation results showed that evolutionary trends were not homogeneous. There were obvious breakpoints in the latitude direction of NDVI evolution in Shaanxi Province, especially between 32–33°N and in the north of 37° N. (4) Compared with precipitation, the annual average temperature was significantly correlated with the vegetation indices (annual NDVI, max NDVI, time integrated NDVI) and phenology metrics (sos, eos). (5) Considering the interaction between environmental variables, the NDVI evolution was dominated by the combined influence of climate and geographic location factors in most areas.

scholarly journals Hydrological Characteristics of Ordovician Karst Top in a Deep Region and Evaluation of Its Threat to Coal Mining: A Case Study for the Weibei Coalfield in Shaanxi Province, China

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Tao Li ◽  
Jiarui Zhang ◽  
Ying Gao ◽  
Xinqi Cao ◽  
Hongyang Liu ◽  
...  
Keyword(s):  
Coal Mining ◽  
North China ◽  
Water Pressure ◽  
Water Inrush ◽  
Drainage Water ◽  
Shaanxi Province ◽  
Water Drainage ◽  
Mining Areas ◽  
Hydrogeological Characteristics ◽  
In Situ Experiments

Widely distributed in North China, Ordovician karst is characterized by having high thickness, nonuniform aquosity, and significant water pressure-bearing properties. Deep mining in North China is threatened by associated water hazards; hence, research on the hydrogeological characteristics of deep Ordovician karst is needed. In this study, the Weibei coalfield in Shaanxi Province, China, was selected as the study area, especially mines in the Hancheng and Chenghe mining areas. In situ experiments, including water pumping, water drainage, water injecting and water pressure, and laboratory experiments, were conducted to study the hydrogeological characteristics of the Ordovician karst top in the study area. A comprehensive analysis was conducted on controlling factors for the development of the Ordovician karst top in the study area, and a method for evaluating the water inrush risk in coal mining areas based on karst hydrogeological characteristics was proposed. The research results indicated that the Ordovician karst top in the study area was characterized by heterogeneity, vertical zonation, and partially filled properties, which were mainly controlled by two factors: sedimentation and tectonism. The hydrogeological conditions of the Ordovician karst could be divided into three types: nonfilled and nonsignificant tectonism, filled and nonsignificant tectonism, and significant tectonism. Among them, the filled and nonsignificant tectonism type Ordovician karst top type had a filling thickness of 20 m. Based on karst hydrogeological characteristics, the methods were proposed to evaluate the water inrush risk in the coal mining floor. The practical tests verified the methods.

scholarly journals Application of domestic high-resolution satellite data On Geological Hazard Monitoring in Coal Mining Areas

2018 ◽  
Vol 53 ◽  
pp. 03008
Author(s):  
Wang Jie ◽  
Wang Hao ◽  
Yao Weiling ◽  
Wang Haiqing ◽  
Li Li
Keyword(s):  
High Resolution ◽  
Coal Mining ◽  
Satellite Data ◽  
Rapid Development ◽  
Dynamic Monitoring ◽  
Geological Hazards ◽  
Geological Disasters ◽  
High Resolution Satellite Images ◽  
Ground Collapse ◽  
Th 1

Rapid development of remote sensing technology has become an important means of geological hazards monitoring. Domestic high- resolution satellite data such as TH-1, ZY-3, GF1/2 and BJ-2, because of its high quality and low price, are more and more widely used in the field of geology. However, there are still some problems in data processing and the research on domestic satellite data in coal mining geological hazards monitoring is not much. So it needs further research and application. This paper aims to establish a set of technology scheme for dynamic monitoring and analysis of geological hazards in coal mining collapse area based on domestic high-resolution satellite. We selected the Xinjiang Uygur Autonomous Region Midong District of Urumqi where geological disasters are more serious as the study area, compared and analyzed the domestic high-resolution satellite images based on the TH-1 (2014), GF-1 (2015), BJ-2 (2016). This paper identified dynamic change of geologic hazard, set up the symbol of interpretation, evaluated and explored the practicability of land disaster investigation and dynamic monitoring with domestic high-resolution satellite. Based on the dynamic monitoring with domestic high-resolution satellite data from 2014 to 2016, we found that the geological disasters such as ground collapse and ground cracks are increasing. We suggest that it should be planned first, and exploitation should be scientific. It is necessary to strengthen the restoration of governance.

scholarly journals Research experiment on infiltration and runoff in Jujube land of northern Shaanxi Province

2015 ◽  
Vol 368 ◽  
pp. 174-179
Author(s):  
X. Song ◽  
P. Bai
Keyword(s):  
Relative Error ◽  
Mean Squared Error ◽  
Shaanxi Province ◽  
Richards Equation ◽  
Mean Relative Error ◽  
The North ◽  
Cumulative Infiltration ◽  
Northern Shaanxi ◽  
The Mean ◽  
Research Experiment

Abstract. To provide guidance for the efficient use of rainwater in Jujube forests of the northern Shaanxi Province, research on the processes of infiltration and runoff under field simulated rainfall were conducted. The process of infiltration and runoff-yield on sloping land was simulated with Richards equation and the water balance equation under different rainfall intensities and soil water content, in the north of Shaanxi province. It reached results via comparing with observation results: the mean relative error of the period cumulative infiltration was less than 3%, with a root mean squared error (RSME) less than 0.3. The mean relative error of the period cumulative runoff was less than 12.5%, RSME < 0.4. The simulation results were reasonable; however, the simulation ponding time generally lagged behind measured ponding time probably because of spatial variation of saturated hydraulic conductivity and uneven rainfall.

Deep Sinking for Coal in the Wyre Forest Coal-Field

The Geologist ◽  
1861 ◽  
Vol 4 (11) ◽  
pp. 468-469
Author(s):  
George E. Roberts
Keyword(s):  
Coal Seam ◽  
Coal Mining ◽  
The Other ◽  
Coal Field ◽  
Coal Seams ◽  
North West ◽  
The North ◽  
Western Border ◽  
Shaft Sinking ◽  
Considerable Range

Some other memoranda which I find among my papers relating to this work (for a section of which, with particulars of shaft-sinking, see “Geologist” of last month) may not be unacceptable to your coal-mining readers.The spot where the shaft was sunk was 476 feet above the level of the Severn Valley Railway at Eymoor, and about 510 feet above the ordinary height of the River Severn, from which it was distant about two miles. The coal seam met with and worked at the depth of 176 yards, has in other parts of the coal-field a thickness of four feet. The colliers regard it as a Flying Reed (red?) coal. Two of the thin coal-seams afterwards sunk through were entirely made up of the remains of Sigillariæ; the coal, in consequence, was “long grained” and slaty. These Sigillarian coals have a considerable range through the Wyre Forest field, and in common with most of the other seams, crop out along the western border. At the Baginswood pits, in the north-west corner of the coal·field, the upper coal, two feet four inches in thickness, worked by hand-draw, being only ten yards from surface, is a most interesting seam, made up entirely of compressed Sigillariæ.

Recent Trends of Desertification in the Maowusu Desert, China

1983 ◽  
Vol 10 (3) ◽  
pp. 213-224 ◽  
Author(s):  
Shiu-Hung Luk
Keyword(s):  
Land Use ◽  
Raw Materials ◽  
Land Use Changes ◽  
Shaanxi Province ◽  
Contributory Factor ◽  
Major Step ◽  
North West ◽  
The North ◽  
Land Use Policies ◽  
The Impact

In the Maowusu Desert—which in the south-east encompasses part of the Yulin Region, Shaanxi Province, and in the north-west the Ih Ju League, Inner Mongolia Autonomous Region—desertification trends in relation to the impact of droughts and land-use changes were investigated. Data derived from Earth resources technology satellites (LANDSAT I and LANDSAT II, 1974–1978), and Chinese documentary sources, were used for the analysis. It was found that desert ‘expansion’ occurred during 1953–76, but the rates of expansion varied over time and space, relatively rapid desertification being observed for 1959–63 and 1971–76. The bulk of the expansion was located in the more arid Ih Ju League. The mean annual rate of areal expansion was 6.4% during 1958–71. By comparing the desertification rates with precipitation and land-use information, it was established that droughts have only accentuated the desertification process. The primary cause of desert expansion is the excessive clearing of land for rain-fed agriculture as well, of course, as overgrazing. Another contributory factor was culling of vegetation for fuel and raw materials for handicraft industries.Efforts have been expended on desert control since the mid-1950s, resulting in the arresting of desertification in some local areas. The individual success stories demonstrate that, with mass participation, effective desert control can be achieved by using low-level technology. However, the Chinese programme of desert control was not conceived as a comprehensive programme. Control activities relied almost exclusively on vegetational methods, and they were seldom coordinated with land-use policies as well as with the planning of energy supplies. The negligence of the fundamental conflict between expanding agricultural activities and desert control has led to a net desert expansion in the last 30 years. Recognition of this fundamental conflict and implementation of mitigative land-use policies, would be a major step towards resolving the desertification problem in the Maowusu Desert.

scholarly journals Residential Development in the Coal Mining Districts of the Kuznetsk Basin in 1930–1932

2020 ◽  
Vol 22 (3) ◽  
pp. 677-687
Author(s):  
D. P. Sarin
Keyword(s):  
Coal Mining ◽  
Migrant Workers ◽  
Building Materials ◽  
Residential Development ◽  
Kuznetsk Basin ◽  
Coal Industry ◽  
Kuznetsk Coal ◽  
Material Base ◽  
Short Period ◽  
Mining Districts

The article features the problem of residential development that migrant workers had to face in the mining districts of the Kuznetsk Basin during the first five-year plan. The author identified the causes of the housing crisis in the early 1930s that forced many independent miners to abandon mining enterprises. The paper describes the agenda taken by the central government authorities of Donbass and Kuzbass in order to provide miners with housing. It focuses on the types of housing in the Kuznetsk Coal Basin according to the method of production and building patterns, including communal houses. Prefabricated standard wooden constructions made it possible to build a lot of houses in a relatively short period of time. The main mistakes included a poor material base, limited workforce, and a shortage of building materials. As a result, the initial construction program was never fulfilled. The research focused on the residential development of the coal mining town of Prokopyevsk, its types of dwellings, the number of citizens involved in mining provided with state-owned housing, and the average housing space per capita. Thanks to the housing commissioned, the housing stock was significantly increased in the coal industry in general, and, more particularly, in the Kuzbassugol coal mining trust. The extensive residential development was not aimed at improving the living conditions of miners and their families but at binding migrants to their mines in order to meet the coal-mining program of the first five-year plans.

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