scholarly journals Multitemporal monitoring of Karvina subsidence trough using Sentinel-1 and TerraSar-X interferometry

2016 ◽  
pp. 53-59 ◽  
Author(s):  
Milan Lazecky
Keyword(s):  
Subsidence Trough

Justification of engineering safety criteria for undermining of water-proof layer in the Upper Kama Salt Deposit

2021 ◽  
pp. 57-63
Author(s):  
A. A. Baryakh ◽  
L. O. Tenison
Keyword(s):  
Water Soluble ◽  
Russian Science ◽  
Mining Operations ◽  
Subsidence Trough ◽  
Safety Criterion ◽  
Mining Depth ◽  
Mine Sites ◽  
Main Thing ◽  
Water Proof

Safety of a water-proof pillar between the stoping void and the aquifers defines the key feature of water-soluble mineral mining. In this regard, the most important element of geomechanical supervision of mining operations, especially, at the mine project stage, is the engineering safety criteria aimed at the adequate valuation of safe undermining of water-proof strata (WPS). The WPS safety procedures now in force calculate only maximal sagging of undermined beds and disregard deformation in the edge area of WPS. In the meanwhile, the edges of WPS are the areas of localization of maximal horizontal strains, and the hazard of vertical jointing is the highest in these areas. In this connection, in the capacity of the index of the manmade load on WPS, it is proposed to use the maximal slope of the edge area of the subsidence trough. The evaluations were carried out in 6 Uralkali’s mine sites selected from the mathematical modeling and geophysical survey data which exhibited considerable damage of WPS. Based on the implemented research and justifications, it is recommended to use the generalized safety criterion for undermining of WPS as a maximal subsidence/mining depth ratio which is directly proportional to the ground slope. This engineering procedure describes more adequately the fracture mechanism in WPS rocks, in particular, damage localization in edge areas of the subsidence trough, or influence of mining depth on WPS stability and, which is main thing, is based on the criteria derived from the long-term observations and measurements performed in the Upper Kama deposit. The study was supported by the Russian Science Foundation, Grant No. 19-77-30008.

scholarly journals ANTHROPOGENIC INFLUENCE OF THE KOMSOMOLSK OIL AND GAS CONDENSATE FIELD ON MODERN DEFORMATION PROCESSES

2018 ◽  
pp. 11-20 ◽  
Author(s):  
Yu. V. Vasilev ◽  
D. A. Misyurev ◽  
A. V. Filatov
Keyword(s):  
Oil And Gas ◽  
Gas Production ◽  
Gas Condensate ◽  
Industrial Safety ◽  
Subsidence Trough ◽  
Oil And Gas Production ◽  
Field Development ◽  
Repeated Observations ◽  
Deformation Processes ◽  
The Relationship

The authors created a geodynamical polygon on the Komsomolsk oil and gas condensate field to ensure the industrial safety of oil and gas production facilities. The aim of its creation is mul-tiple repeated observations of recent deformation processes. Analysis and interpretation of the results of geodynamical monitoring which includes class II leveling, satellite observations, radar interferometry, exploitation parameters of field development provided an opportunity to identify that the conditions for the formation of recent deformations of the earth’s surface is an anthropogenic factor. The authors identified the relationship between the formation of subsidence trough of the earth’s surface in the eastern part of the field with the dynamics of accumulated gas sampling and the fall of reservoir pressures along the main reservoir PK1 (Cenomanian stage).

Une grande region de faible resistance dans la partie mediane du Massif Central francais [with discussion]

1947 ◽  
Vol S5-XVII (1-3) ◽  
pp. 55-59
Author(s):  
Pierre Lapadu-Hargues
Keyword(s):  
Subsidence Trough ◽  
Massif Central ◽  
The Core

Abstract Concludes that the Causses region (a subsidence trough filled with Jurassic deposits), the Margeride batholith (a Carboniferous granitic massif), and the Marvejols-Aumont-Aubrac fault are genetically related structures whose formation was due to the presence at depth of a zone of weakness in the core of the Central Massif.

Presence d'un fosse de subsidence dans le prolongement argonnais de la double faille de la Marne

1957 ◽  
Vol S6-VII (1-3) ◽  
pp. 229-237
Author(s):  
Michel Clin ◽  
P. Marie
Keyword(s):  
The South ◽  
Subsidence Trough ◽  
Surface Observations ◽  
Geologic Information

Abstract Geologic information obtained from a well drilled for water midway between Clermont-en-Argonne and Les Islettes, France, and surface observations indicate that the region is a subsidence trough structurally related to the Marne double fault to the south.

Le compartiment affaisse du Mirebalais

1957 ◽  
Vol S6-VII (1-3) ◽  
pp. 215-220
Author(s):  
Gerard Waterlot
Keyword(s):  
Subsidence Trough ◽  
Structural Orientation

Abstract The structural orientation of the Mirebalais subsidence trough conforms with that of the rest of the Poitou corridor, France. The trough has subsided between two principal faults with south Armorican trends, of which one has not been shown on published maps.

scholarly journals MULTI BAND INSAR ANALYSIS OF SUBSIDENCE DEVELOPMENT BASED ON THE LONG PERIOD TIME SERIES

2015 ◽  
Vol XL-1-W5 ◽  
pp. 115-121 ◽  
Author(s):  
F. C. Çomut ◽  
A. Ustun ◽  
M. Lazecky ◽  
M. M. Aref
Keyword(s):  
Time Series ◽  
Vertical Direction ◽  
Geodetic Network ◽  
Sar Interferometry ◽  
Subsidence Trough ◽  
Dynamic Changes ◽  
Industrial Growth ◽  
Network Time ◽  
The Impact

The SAR Interferometry (InSAR) application has shown great potential in monitoring of land terrain changes and in detection of land deformations such as subsidence. Longer time analysis can lead to understand longer trends and changes. Using different bands of SAR satellite (C- from ERS 1-2 and Envisat, L- from ALOS) over the study area, we achieve knowledge of movements in long-term and evaluation of its dynamic changes within observed period of time. Results from InSAR processing fit with the position changes in vertical direction based on GPS network established over the basin as an effective geodetic network. Time series (StaMPS PS+SB) of several points over Çumra County in eastern part of Konya City show a general trend of the deformation that is expected to be approximately between -13 to -17 mm/year. Northern part of Karaman is affected by faster subsidence, borders of the subsidence trough were identified from Envisat. <br><br> Presenting InSAR results together with GIS information about locations and time of occurrence of sudden subsidence, urban/industrial growth in time and climate changes helps in better understanding of the situation. This way, the impact of natural and man-made changes will be shown for urban planning thanks to InSAR and GIS comparisons with hydrogeological modeling. In this study we present results of differential and multitemporal InSAR series using different bands and GIS conjunction associated with seasonal and temporal groundwater level changes in Konya Closed Basin.

scholarly journals Ground Subsidence Prediction Model and Parameter Analysis for Underground Gas Storage in Horizontal Salt Caverns

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Guimin Zhang ◽  
Yuxuan Liu ◽  
Tao Wang ◽  
Hao Zhang ◽  
Zhenshuo Wang
Keyword(s):  
Prediction Model ◽  
Operating Conditions ◽  
Parameter Analysis ◽  
Ground Subsidence ◽  
Subsidence Trough ◽  
Reduced Volume ◽  
Proposed Model ◽  
Maximum Subsidence ◽  
Bedded Salt Formations ◽  
Salt Caverns

Due to a great demand of natural gas or oil storage in these years, horizontal caverns were proposed to fully use bedded salt formations of China. Under the same geological and operating conditions, the horizontal cavern would shrink more than traditional pear-shaped cavern, which might bring larger ground subsidence and affect the safety of storage facilities. A new prediction model was proposed in this paper for the time-dependent ground subsidence above horizontal caverns. The proposed model considered the impurity of bedded salt formations and simplified the horizontal cavern to an ideal cylinder. The shape of the subsidence trough was determined by the probabilistic integration method, and corresponding calculation formulas for the tilt, curvature, horizontal displacement, and horizontal strain were derived. Based on the assumption that the subsidence volume at the ground was proportional to the reduced volume of horizontal cavern, a formula for the reduced volume over time was established. FLAC3D was introduced to simulate the ground subsidence, and the results show that the proposed prediction model agreed well with the simulation results. Finally, the proposed prediction model was used to analyze the impacts of different stratigraphic parameters and design parameters. The results mainly show that, as the draw angle increases, the subsidence trough becomes deeper and narrower; as the depth of the cavern increases, the maximum subsidence first increases and then decreases, and the subsidence trough gradually becomes round; with the increase of the purity, the subsidence gradually decreases; with the increase of the creep properties and the stress exponential constant, the maximum subsidence first increases rapidly and then slowly approaches the limit; increasing the brine extraction velocity can shorten the cavern construction period and then reduce excessive ground subsidence; the subsidence decreases nonlinearly with the increase of internal pressure; with the increase of the cross section diameter and length of the horizontal cavern, the subsidence presents a significant nonlinear increase. In addition, unlike the traditional pear-shaped cavern, under the same conditions, the ground subsidence above the horizontal cavern according to this newly proposed model is much larger, and the ground subsidence contour line is no longer a standard circle. The findings of this study can help for better understanding of the prediction of ground subsidence above salt caverns and also provide a reference for the design and construction. However, the proposed prediction method is ideal and theoretical and should be further improved by engineering practice in the future.

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