Analysis of Ground Surface Displacements under the Influence of Repeated Mining Activities in the Zhezkazgan Area

2021 ◽  
pp. 11-17
Author(s):  
N.F. Nizametdinov ◽  
V.D. Baryshnikov ◽  
R.F. Nizametdinov ◽  
M.B. Igemberlina ◽  
H. Stankova ◽  
...  
Keyword(s):  
Ground Surface ◽  
Mining Activities ◽  
Surface Displacements

Analysis of Ground Surface Displacements under the Influence of Repeated Mining Activities in the Zhezkazgan Area

2021 ◽  
Vol 57 (2) ◽  
pp. 184-189
Author(s):  
N. F. Nizametdinov ◽  
V. D. Baryshnikov ◽  
R. F. Nizametdinov ◽  
M. B. Igemberlina ◽  
H. Staňková ◽  
...  
Keyword(s):  
Ground Surface ◽  
Mining Activities ◽  
Surface Displacements

scholarly journals Estimate of a spatially variable reservoir compressibility by assimilation of ground surface displacement data

2015 ◽  
Vol 372 ◽  
pp. 351-356 ◽  
Author(s):  
C. Zoccarato ◽  
D. Baù ◽  
F. Bottazzi ◽  
M. Ferronato ◽  
G. Gambolati ◽  
...  
Keyword(s):  
Land Surface ◽  
Ground Surface ◽  
Surface Displacement ◽  
Test Case ◽  
Geomechanical Model ◽  
Gas Field ◽  
Surface Displacements ◽  
Model Response ◽  
Synthetic Test ◽  
Gas Fields

Abstract. Fluid extraction from producing hydrocarbon reservoirs can cause anthropogenic land subsidence. In this work, a 3-D finite-element (FE) geomechanical model is used to predict the land surface displacements above a gas field where displacement observations are available. An ensemble-based data assimilation (DA) algorithm is implemented that incorporates these observations into the response of the FE geomechanical model, thus reducing the uncertainty on the geomechanical parameters of the sedimentary basin embedding the reservoir. The calibration focuses on the uniaxial vertical compressibility cM, which is often the geomechanical parameter to which the model response is most sensitive. The partition of the reservoir into blocks delimited by faults motivates the assumption of a heterogeneous spatial distribution of cM within the reservoir. A preliminary synthetic test case is here used to evaluate the effectiveness of the DA algorithm in reducing the parameter uncertainty associated with a heterogeneous cM distribution. A significant improvement in matching the observed data is obtained with respect to the case in which a homogeneous cM is hypothesized. These preliminary results are quite encouraging and call for the application of the procedure to real gas fields.

Micro-relief development in polygonal patterned ground in the Dry Valleys of Antarctica

2011 ◽  
Vol 75 (2) ◽  
pp. 347-355 ◽  
Author(s):  
Bernard Hallet ◽  
Ron Sletten ◽  
Kevin Whilden
Keyword(s):  
Remote Sensing ◽  
Numerical Model ◽  
Ground Surface ◽  
Field Measurements ◽  
Polar Regions ◽  
Dry Valleys ◽  
Patterned Ground ◽  
Viscous Material ◽  
Surface Displacements ◽  
Subsurface Material

AbstractPolygonal patterned ground in polar regions of both Earth and Mars has received considerable attention. In comparison with the size, shape, and arrangement of the polygons, the diverse micro-relief and topography (termed here simply “relief”) of polygonal patterned ground have been understudied. And yet, the relief reflects important conditions and processes occurring directly below the ground surface, and it can be observed readily in the field and through remote sensing. Herein, we describe the relief characteristic of the simplest and relatively young form of patterned ground in the Dry Valleys of Antarctic. We also develop a numerical model to examine the generation of relief due to subsurface material being shouldered aside contraction cracks by incremental sand wedges growth, and to down-slope creep of loose granular material on the surface. We model the longterm subsurface deformation of ice-cemented permafrost as a non-linear viscous material. Our modeling is guided and validated using decades of field measurements of surface displacements of the permafrost and relief. This work has implications for assessing the activity of surfaces on Earth and Mars, and much larger scale potential manifestations of incremental wedging in icy material, namely the distinct paired ridges on Europa.

scholarly journals Seasonal and Interannual Ground-Surface Displacement in Intact and Disturbed Tundra along the Dalton Highway on the North Slope, Alaska

Land ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 22
Author(s):  
Go Iwahana ◽  
Robert C. Busey ◽  
Kazuyuki Saito
Keyword(s):  
Ground Surface ◽  
Surface Displacement ◽  
Satellite System ◽  
The North ◽  
Surface Displacements ◽  
Standard Deviation Range ◽  
Thaw Depth ◽  
Ice Wedge ◽  
Global Navigation Satellite ◽  
Northern Alaska

Spatiotemporal variation in ground-surface displacement caused by ground freeze–thaw and thermokarst is critical information to understand changes in the permafrost ecosystem. Measurement of ground displacement, especially in the disturbed ground underlain by ice-rich permafrost, is important to estimate the rate of permafrost and carbon loss. We conducted high-precision global navigation satellite system (GNSS) positioning surveys to measure the surface displacements of tundra in northern Alaska, together with maximum thaw depth (TD) and surface moisture measurements from 2017 to 2019. The measurements were performed along two to three 60–200 m transects per site with 1–5 m intervals at the three areas. The average seasonal thaw settlement (STS) at intact tundra sites ranged 5.8–14.3 cm with a standard deviation range of 2.1–3.3 cm. At the disturbed locations, averages and variations in STS and the maximum thaw depth were largest in all observed years and among all sites. The largest seasonal and interannual subsidence (44 and 56 cm/year, respectively) were recorded at points near troughs of degraded ice-wedge polygons or thermokarst lakes. Weak or moderate correlation between STS and TD found at the intact sites became obscure as the thermokarst disturbance progressed, leading to higher uncertainty in the prediction of TD from STS.

scholarly journals INTEGRATED SAR TECHNOLOGIES FOR MONITORING THE STABILITY OF MINE SITES: APPLICATION USING TERRASAR-X AND RADARSAT-2 IMAGES

2015 ◽  
Vol XL-7/W3 ◽  
pp. 1057-1062 ◽  
Author(s):  
M. Rheault ◽  
Y. Bouroubi ◽  
V. Sarago ◽  
P. T. Nguyen-Xuan ◽  
P. Bugnet ◽  
...  
Keyword(s):  
Surface Deformation ◽  
Ground Surface ◽  
Surface Subsidence ◽  
Sar Interferometry ◽  
Open Pit ◽  
Large Area ◽  
Mining Sites ◽  
Thaw Cycle ◽  
Surface Displacements ◽  
The Stability

The last three decades have seen significant mining development in the northern regions of Canada, where the freeze and thaw cycle of permafrost and corresponding surface subsidence and heave represent a significant challenge at all mining stages, from the design of infrastructures to the monitoring of restored areas. Over the past ten years, SAR interferometry has been widely used to monitor ground surface deformation. With this technique, changes in phase between two SAR acquisitions are used to detect centimetre to millimetre surface displacements over a large area with high spatial resolution. This paper presents the results of a project that aims to develop a SAR solution to provide useful information for environmental monitoring and assessing the stability of mining sites. RADARSAT-2 and TerraSAR-X images acquired during the summer of 2014 were used to measure the displacements of ground surface, infrastructures and stockpiles caused by seasonal changes in permafrost extent. The study area is an open-pit mine located in Nunavut, northern Canada, in the continuous permafrost zone. Results shown that surface displacements calculated from RADARSAT-2 and TerraSAR-X are very similar and in agreement with scientific and terrain knowledge. Significant displacements were observed in loose soil areas while none was detected in bedrock and rock outcrop areas. The areas most affected by active layer changes showed surface subsidence during the thaw settlement period. Thus, InSAR can be used as a tool to guide the siting and design of new infrastructure as well as highlighting risks in areas of unstable terrain.

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