Your single point of reference for all your Geotechnical Inquiries

Searching Geotechpedia for subsidence

<p>Thin coastal dykes typically found in developing countries may suddenly collapse due to rapid land subsidence, material ageing, sea-level rise, high wave attack, earthquakes, landslides, or a collision with vessels. Such a failure could trigger dam-break ...
Reference: Nat. Hazards Earth Syst. Sci., 16, 1629–1638, 2016
<p>The Barapukuria Coalfield is only production coalfield in Bangladesh with coal deposit area of approximately 6.25 km2. Geologically, the coal basin is a singular syncline in which coal occurs at shallower depth at the northern part and deeper depth at the ...
Reference: International Journal of Emerging Technology and Advanced Engineering, Volume 4, Issue 3, March 2014
<p>Seafloor spreading and the cooling of oceanic lithosphere is a fundamental feature of plate tectonics in the Earth, the details of which are unveiled by modeling with constraints from mineral physics and geophysical observations. To work toward a more complete ...
Filed under: Geology -  General Geology
Reference: G3 Volume 14, Number 9 23 September 2013
<p>For guidance on relationships between caving depth and surface subsidence, a comprehensive database was developed after an exhaustive search of published data from cave mining operations from around the world. The distribution of data was found to largely ...
Reference: International Journal of Rock Mechanics & Mining Sciences 61 (2013) 31–42
<p style="text-align: justify;">The LKAB Malmberget Mine is mined using sublevel caving. This mining method is cost-effective but results in successive caving of the host rock and mining-induced ground deformations. Consequently, re-locations of residential ...
Reference: Journal of Earth Sciences and Geotechnical Engineering, vol. 3, no. 4, 2013, 147-173 ISSN: 1792-9040 (print), 1792-9660 (online) Scienpress Ltd, 2013
The occurrence of subsidence, either by natural or anthropogenic factors, is of concern in engineering practice due to the potential impacts on infrastructure, natural resources and the environment. Subsidence is a complex phenomenon involving different processes ...
Reference: Report Submitted to The Office of the NSW Chief Scientist and Engineer As Part of the Review of Coal Seam Gas Activities in NSW 31 July 2013
<p>During tunneling in loose grounds, the ground deformation caused by drillings around the tunnel, leads to land subsidence and the adjacent tunnel which would affect tunnel structure and surrounding structures. In such situations it is necessary to improve ...
Reference: Open Journal of Civil Engineering, 2016, 6, 156-162
Tectonic deformation from the 2010 Maule (Chile) Mw 8.8 earthquakeincluded both uplift and subsidence along about 470 km of the central Chilean coast. In the south, deformation included as much as 3 m of uplift of the Arauco Peninsula, which produced emergent ...
Reference: Earthquake Spectra, Volume 28, No. S1, pages S39–S54, June 2012; 2012, Earthquake Engineering Research Institute
<p>A numerical assessment of historical, caving induced subsidence at the Kiirunavaara Lake Orebody has been conducted. Established displacement and strain-based criteria have been used to accurately simulate the evolution of ground surface displacements during ...
Land subsidence in the Lisbon area validated by two geodetic techniques GNSS and PSInSAR
Reference: "FIG Working Week 2011 Bridging the Gap between Cultures Marrakech, Morocco, 18-22 May 2011"
Software by  NIOSH
AMSS is a software program that helps to identify the location and likely severity of multiple seam interactions. Multiple seam interactions are a major ground control hazard in many US underground coal mines. The two most common types of interactions are:<ul><li>Undermining, ...
<p>The field scale reservoir and overburden are 3D structures with complex material and stress states that cannot be accurately described by traditional 1D methods; Elfen horizon ensures that the geomechanical aspects of the reservoir receive as much attention ...
<p>This program is used for analysis and determination of the shape of subsidence trough above excavations and to evaluate the damage to buildings situated in the affected area.</p>
Software by  Carlson
Generate isopachs and subsidence based on depth of mining, geological charateristics, and mine design parameters. SDPS is a niche program developed through the Virginia Polytechnic Institute and State University (Virginia Tech) and Carlson Software is the ...
Filed under: Mining Software -  General
Stainless steel reference points are permanently installed at measurement stations along the tunnel or structure. To obtain a measurement, the operator stretches the tape between two reference points, hooking the free end of the tape to one point and the instrument ...
A heave/settlement point consists of a three-pronged anchor, an inner pipe and an outer pipe, both steel. The inner pipe is attached to the anchor and is free to move inside the outer pipe. An optical survey is used to determine the elevation of the top of ...
The magnet extensometer is used to monitor settlement and heave in excavations, foundations, dams, and embankments. It can also be installed behind retaining structures, such as sheet piles and slurry walls, and above underground openings, such as tunnels ...
<p>A settlement cell consists of a liquid reservoir, liquid-filled tubing, and the settlement cell, which contains a pressure transducer. One end of the tubing is connected to the settlement cell, which is embedded in fill or installed in a borehole. The other ...
The rod extensometer monitors changes in the distance between one or more downhole anchors and a reference head at the borehole collar. Components of a rod extensometer include anchors, rods with protective tubing, and a reference head. The anchors, with rods ...
Settlement hooks are used with telescoping inclinometer casing to identify the zones and magnitude of settlement in the ground surrounding the casing. The operator connects the hook to a survey tape and lowers the hook into the inclinometer casing. When the ...
The Sondex Settlement System is used to monitor settlement and heave in excavations, foundations, dams, and embankments. It can also be installed behind retaining structures, such as sheet piles and slurry walls, and above underground openings, such as tunnels ...
A settlement cell consists of a liquid reservoir, liquid-filled tubing, and the settlement cell, which contains a pressure transducer. One end of the tubing is connected to the settlement cell, which is embedded in fill or installed in a borehole. The other ...
Science Daily   15 June 2016   USA   Texas  
<p>Two giant sinkholes that sit between two West Texas oil patch towns are growing -- and two new ones appear to be lurking, say geophysicists. Satellite radar images reveal substantial ground movement in and around the infamous sinkholes near Wink, Texas ...
Filed under: Natural Hazards
Science Daily   20 August 2015   USA   California  
<p>As Californians continue pumping groundwater in response to the historic drought, the California Department of Water Resources has released a new NASA report showing land in the San Joaquin Valley is sinking faster than ever before, nearly 2 inches (5 centimeters) ...
Filed under: Natural Hazards