Application of DInSAR in Mine Surface Subsidence Monitoring and Prediction

Abstract

Most studies of surface subsidence and its impacts have been done on underground coal mines. There are few studies on the occurrences of surface subsidence in underground metal mines, particularly in India, even though the fundamental subsidence engineering principles are the same for both coal and metal mines. The current ground-based measurement techniques monitor ground subsidence on a particular point and are time-consuming as well as costly. To study hardrock mine surface deformation due to underground mining, new and effective technologies must be adopted. The spaceborne subsidence monitoring has emerged as a better technique after the development of satellite radar interferometry. The technology is fast improving with enhanced synthetic aperture radar (SAR) sensors on different spaceborne platforms. Differential interferometric SAR techniques are widely used to measure the topographic profile and surface deformations. This article reviews the applications of spaceborne SAR interferometric techniques in the prediction and monitoring of surface subsidence due to underground mining.

Time Series of Land subsidence rate on Coastal Demak Using GNSS CORS UDIP and DINSAR

“…The phase difference is calculated for each pixel. When InSAR is used to recognize and measure ground deformation, this process is referred to as the InSAR differential [4].…”

Characteristics of Roof Ground Subsidence While Applying a Continuous Excavation Continuous Backfill Method in Longwall Mining

“…Due to insufficient support, the overlying strata could sink into the goaf caused by their own weight during the mining process or in a period of time after mining [4]. This subsidence could extend up to the ground without any effective preventative measures, and therefore cause ground subsidence in an area larger than the mining range [5]. Since the ground subsidence due to underground mining could lead to buildings and farmlands being damaged [6][7][8], as well as water pollution and loss [9][10][11], it has been a worldwide problem and has generated widespread concerns in realms such as mining and environmental protection [5,12,13].…”

Identification and Measurement of Deformation Using Sentinel Data and Psinsar Technique in Coalmines of Korba

“…The SAR interferometry concept has been introduced in the last 1980s (Gabriel, Goldstein, and Zebker 1989). Interferometry SAR (InSAR) (Aydoner, Maktav, and Alparslan 2004) techniques are widely used, to measure the topographic profile and surface deformations (Ishwar and Kumar 2017) (Fulton 2000) and for subsidence monitoring (Strozzi et al 2001). SAR is the radar antenna which synthesizes images by the principle of Doppler effect, the antenna is focused on an object/ element to generate an image in the along track and across track direction.…”

“…SAR is the radar antenna which synthesizes images by the principle of Doppler effect, the antenna is focused on an object/ element to generate an image in the along track and across track direction. SAR-Interferometry (InSAR) is one of the competent techniques used to understand the land surface motion and land subsidence (land surface sinking) (Ishwar and Kumar 2017) (Strozzi et al 2001) (Sahu, Pradhan, and Jade 2016) over a large area (Bonì et al 2017) at a cost lower than the traditional techniques (Ng et al 2011) (Ferretti, Prati, and Rocca 2001a). The common traditional techniques used for * Corresponding author measuring deformation at ground based on regional level are precise leveling, total station, global navigation satellite system (GNSS), etc.…”

“…The coal mines have basically three kinds of subsidence, crack, pit hole and sag (Sahu and Lokhande 2015) (Lokhande et al 2005). The subsidence has been noticed and written in 1556 in the literature of Agricola's De RE Metallica (Singh 1992) but for subsidence engineering, the formal study was started for European coal mines in the 19th century (Ishwar and Kumar 2017). Typically subsidence occurs due to resource extraction (States 1991) (Sahu and Lokhande 2015) and less buoyancy to support the external pressure (Fulton 2000).…”