[Retracted] Mine Geological Environment Monitoring and Risk Assessment in Arid and Semiarid Areas

Abstract

Along with the accelerated shift of coal mining to the ecologically fragile west, the contradiction between coal resource development and ecological protection in the western arid and semiarid coal mining areas is rapidly intensifying. Based on the above background, this thesis takes the coal mining area in the arid and semiarid regions as an example; applies the theories of ecology, coal mining subsidence, geodesy, and ecological restoration; uses remote sensing in synthetic aperture radar (SAR), geographic information system (GIS), and mathematical modelling to reveal the ecological evolution law of the mining area; measures the ecological damage of the mining area; and then proposes a reasonable ecological restoration strategy. The surface deformation monitoring study in the study area shows that on the whole, some areas in the study area have different degrees of surface subsidence disasters, and the maximum surface subsidence value exceeds 800 mm. From the distribution of surface subsidence in the study area, surface subsidence disasters mainly occur in the eastern and central mountainous areas rich in coal resources, as well as in the mining areas west of the Yellow River, and the subsidence basins are distributed in a series of irregular concentric ovals. In terms of the scale of surface subsidence in the study area, a total of 230.03 km2 of land in the study area showed surface subsidence hazards during the monitoring period, accounting for 13.78% of the total area of the study area, of which the area of severe subsidence was 44.98 km2 (2.69%). The area of more serious subsidence area is 101.33 km2 (6.07%), and the area affected by subsidence is 83.72 km2 (5.01%).

Stability Evaluation of Slope Based on Global Sensitivity Analysis

“…It is well-known that the uncertainty of random variables will greatly afect the output response. It is important for engineering risk assessment to determine the infuence of the uncertainty of random variables on output response [1]. Tere are many uncertainties in the actual slope engineering, so it is important to study these uncertainties for slope stability.…”

Micro-topographies formed by erosion can drive seedling emergence by rebuilding micro-habitats on weathered waste dumps in northeastern China

“…Research has shown that 0.22 hm 2 of land is destroyed for every 10,000 tons of coal produced through opencast mining (Lechner et al, 2016). In addition, coal exploitation can lead to widespread ground fissures (Yang et al, 2022), rapid decrease of forest resources and grassland (Wu et al, 2021), expose polycyclic aromatic hydrocarbons (PAhs) to the ecological environment (Jiang et al, 2022), and intensify soil erosion and desertification (Jin et al, 2021), which can lead to ecological destruction in the mining area. Many large-scale coal mines in China are located in semiarid and arid regions, where the ecology and environment are easily degraded by mining activities (Pasture, 2021).…”

Ecological Impact Prediction of Groundwater Change in Phreatic Aquifer under Multi-Mining Conditions

“…Continuous development of underground coal mining would lead to the deformation and collapse of the overlying strata, resulting in fissures and subsidence, which will destroy the groundwater aquifer system [6], reduce the regional groundwater level, and affect the surface ecological environment. Unlike other regions, coal deposits in Inner Mongolia and Shaanxi are located in arid and semi-arid regions [7][8][9], which are areas of serious soil erosion in China, and their ecological environment is very fragile. Consequently, there is a major contradiction between groundwater loss through drainage by coal mining and the lack of water resources for vegetation growth.…”