منابع مشابه
Radar Interferometry for Mining Subsidence Monitoring
Coal mining activities all over the world often introduce serious environmental impact to the local regions, such as the occurrence of land subsidence. Conventional subsidence monitoring is done by precision leveling and GPS surveying. However, recent studies show that differential interferometric synthetic aperture radar (DInSAR) is capable of monitoring land subsidence at sub-cm accuracy. In ...
متن کاملMonitoring underground coal mining - induced subsidence
Monitoring of mine subsidence by means of classical methods such as optical levelling or Global Positioning System (GPS) surveys can reveal deformations with sub-millimetre to subcentimetre precision for localised areas. However, to provide data on a reasonably dense two-dimensional (2D) benchmark grid are costly and time-consuming for all but the smallest areas. Moreover, a regular re-survey o...
متن کاملMining Subsidence Monitoring Using the Combined Insar and Gps Approach
Compared to opencut mining, underground coal mining is more common in Australia due to its lesser impact on the environment. Although there are several underground mining methods, such as the longwall, pillar, bord, and miniwall, longwall mining is the most commonly used method due to its high efficiency. However, longwall mining does lead to significant ground subsidence. Mining subsidence is ...
متن کاملVisualized Application of Gis in Mining Subsidence Analysis
To determine the degree of mining affection on surface or in strata, the GIS technique is used, with Mapinfo as the platform. Through programming of seam inclination-based subsidence mathematical models and mining disturbance analysis visualization, Mapbasic/Vc++/Vfortran programming design is realized under Windows. The program system provides not only an effective approach for model analysis,...
متن کاملPituitary macroadenoma resulting from primary hypothyroidism: A16-year-old girl
Background: Primary hypothyroidism is a common medical condition. It can lead to pituitary adenoma which is usually asymptomatic, but it can also lead to symptomatic macroadenomas which are hard to diagnose due to different clinical presentations. Case presentation: A 16-year-old girl presented for endocrinology consultation prior to neurosurgical operation. She had galactorrhea which was acco...
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ژورنال
عنوان ژورنال: Nature
سال: 1917
ISSN: 0028-0836,1476-4687
DOI: 10.1038/099033b0