Preface

Whittaker, B.N.; Reddish, D.J.

doi:10.1016/b978-0-444-87274-6.50004-6

Cited by 27 publications

(44 citation statements)

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“…As the cave system collapses during burial, overlying strata will sag or subside over the collapsed area. This phenomenon is well documented in mining literature (Kratzsch, 1983;wittaker and Reddish, 1989). Kratzsch (1983, p. 147) presented a diagram (Fig.…”

Section: Suprastratal Deformationsupporting

confidence: 60%

A Review of Coalesced, Collapsed-Paleocave Systems and Associated Suprastratal Deformation

Loucks

2007

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IzvlečekUDK 551.44 Robert G. Loucks: Medsebojno združeni porušeni paleokraški jamski sistemi in deformacije nad njimi ležečih plastipregled Medsebojno združeni porušeni paleokraški jamski sistemi in deformacije nad njimi ležečih plasti predstavljajo izrazite diagenetsko/strukturne oblike karbonatnih zaporedij v bližini sestavljenih geoloških nezveznosti. Osnovno zgradbo posameznega sistema lahko razdelimo na dva dela. Spodnji zakraseli del, kjer je gostota jam velika, je ohranjen v obliki masivnih breč, ki pogosto kažejo v tlorisu vzorec sestavljen iz ravnih odsekov. Za deformirane plasti, ki prekrivajo porušene jamske sisteme, so značilne velike skledaste do škatlaste uleknine, ki jih sekajo prelomi in razpoke. Regionalno gradijo združeni paleokraški jamski sistemi tega tipa vzorec velikega merila (zajemajo območja velika stotine do tisoče kvadratnih kilometrov), sestavljen iz ravnih odsekov in vključuje območja zgoščenih združenih brečastih teles, ločenih z relativno neprizadeto prikamnino. Tak vzorec lahko kaže na razvoj paleokraškega jamskega sistema vzdolž razpoklinskih con. Porušeni paleokraški jamski sistemi predstavljajo velike kompleksne pojave, ki odražajo organiziranost velikega merila. Za opredelitev zgradbe in razprostranjenosti popolnega paleokraškega jamskega sistema teh dimenzij potrebujemo podatke seizmičnih raziskav ali izdanke dimenzij gorovja. Ključne besede: pelokraški jamski sistemi, paleokras, deformacije, jamski sistemi. Coalesced, collapsed-paleocave systems and associated suprastratal deformation appear to be prominent diagenetic/structural features in carbonate sections at/near composite unconformities. The basic architecture of the system can be divided into two sections. The lower karsted section, where high-density cave formation took place, is preserved as massive breccias commonly displaying a rectilinear pattern in map view. The overlying suprastratal deformation section is characterized by large, circular to linear sag structures containing faults and fractures. Regional distribution of coalesced, collapsed-cave systems commonly appears as large-scale (hundreds to thousands of square kilometers in area), rectilinear patterns with areas of concentrated, coalesced breccias separated by relatively undisturbed host rock. This pattern may reflect development of the paleocave system along fracture swarms. Collapsed-paleocave systems are large, complex features that show broad-scale organization. The complete paleocave system may need seismic data or large, mountain-scale outcrops to define their architecture and distribution.

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Section: Suprastratal Deformationsupporting

confidence: 60%

A Review of Coalesced, Collapsed-Paleocave Systems and Associated Suprastratal Deformation

Loucks

2007

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“…The horizontal ground strain profile is linearized and the horizontal strain amplitude SAM is assessed with a value between 0 and 1. SAM is then multiplied by the maximal value of the horizontal ground strain (Equation 15, Whittaker and Reddish (1989)). …”

Section: Validation Of Methodology With Observed Damage In Masonry Bumentioning

confidence: 99%

“…13. Empirical equations suggested in the literature (Whittaker and Reddish (1989)) are used to identify the location where the horizontal strain is maximal, i.e. approximately the quarter of the distance between the inflection point and the centre or the border of the subsidence profile.…”

Section: Validation Of Methodology With Observed Damage In Masonry Bumentioning

confidence: 99%

“…The first step is the prediction of the subsidence parameters at the ground surface: vertical subsidence and horizontal ground displacements. Many methods exist that are not into the scope of this paper (Whittaker and Reddish (1989), Melis et al (2002) and Coulthard et al (1998)). The second step is the calculation of the horizontal ground strain at the ground surface, in the vicinity of each building.…”

Section: Application Of Vulnerability Curvesmentioning

confidence: 99%

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Development of building vulnerability functions in subsidence regions from analytical methods

Saeidi¹,

Deck²,

Verdel³

2012

Géotechnique

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Ore and mineral extraction by underground mining often causes ground subsidence phenomena, and may induce severe damage to buildings. This paper develops vulnerability and fragility functions to assess building damage in the context of mining subsidence hazards, comparable to functions use for other hazards. These functions are based on existing analytical methods for damage assessment. They take into account both the uncertainty of the geometric and mechanical parameters of the building and the soil structure interaction phenomena that may have a critical influence on the building loading. The present paper discusses the methodology used to determine these functions, and the analytical method for damage evaluation is described. The second part is a detailed application of the methodology for a masonry building with or without reinforcement, for which both vulnerability and fragility functions are calculated. Finally, vulnerability functions are tested and validated with a set of 3 subsidences that occurred in Lorraine (France) between 1996 and 1999.

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“…Ground surface subsidence due to longwall coal mining is a recurrent problem for mining companies and coal extractors . The ability to predict and manage the ground surface mining‐induced subsidence is deemed necessary for coal mining companies to gain approval from government organisations.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of multistage caving processes: insights from multi‐seam longwall mining‐induced subsidence

Ghabraie

Ren

et al. 2016

Num Anal Meth Geomechanics

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Summary Evaluating the induced subsidence is a critical step in multi‐seam longwall mining. Numerical modelling can be a cost‐effective approach to this problem. Numerical evaluation of longwall mining‐induced subsidence is much more complicated when more than one seam is to be extracted. Only a few research works have dealt with this problem. This paper discusses the essential requirements of a robust numerical modelling approach to simulation of multi‐seam longwall mining‐induced subsidence. In light of these requirements, the previous works on this topic are critically reviewed. A simple yet robust FEM‐based modelling approach is also proposed that is capable of simulating caving process, rock mass deterioration and subsidence around multi‐seam excavations. The effectiveness of this approach in comparison with two other conventional FEM approaches is demonstrated through numerical examples of two different multi‐seam mining configurations. Results show that the proposed numerical modelling approach is the only robust method, which is capable of simulating multi‐seam subsidence in both demonstrated cases. Copyright © 2016 John Wiley & Sons, Ltd.

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Preface

Cited by 27 publications

References 0 publications

A Review of Coalesced, Collapsed-Paleocave Systems and Associated Suprastratal Deformation

A Review of Coalesced, Collapsed-Paleocave Systems and Associated Suprastratal Deformation

Development of building vulnerability functions in subsidence regions from analytical methods

Numerical modelling of multistage caving processes: insights from multi‐seam longwall mining‐induced subsidence

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