Geophysical site assessment in karst terrain: A case study from southwestern Missouri

Varnavina, Aleksandra; Khamzin, Aleksey K.; Kidanu, Shishay; Anderson, Neil Lennart

doi:10.1016/j.jappgeo.2019.103838

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…Karst processes can result in large-scale voids -extensive fissures and cavernsand can lead to the creation of spongy or porous rocks. The natural consequence of karst is that the voids are filled with a mixture of fine rock grains and rock fragments from loose layers of overburden, which in turn is manifested by the occurrence of sinkholes and other forms of discontinuous deformations on the surface of the land [17][18][19].…”

Section: Karst Processesmentioning

confidence: 99%

Application of Electrical Resistivity Tomography for the Assessment of Sinkhole Hazard to Improve Public Health and Safety Conditions on Post-Mining Lands

Jendruś,

Strozik,

Sowiński

2023

Pol. J. Environ. Stud.

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In post-mining areas where hard coal mining took place under a thick overburden of carbonate rocks, there are often geomechanical threats occurring to the designed and existing buildings. They manifest by the occurrence of post-mining voids and deformations created in the Carboniferous layers and related to erosive processes, including karst ones occurring in the rock environment carbonate. Various geophysical research methods, including electrical resistivity imaging, find application in the assessment of deformations in the rock mass. Geophysical surveys may be applied to assess the necessity of carrying out treatment and protection works, e.g., borehole injection and determination of the boreholes' number and location. The paper presents two case studies of geophysical surveys using the method of two-level electrical resistivity profiling (ERP) and electrical resistivity tomography (ERT) in two adjacent research areas with a similar geological structure and a similar scope of mining operations. Based on the analysis of the obtained results, injection of voids and zones of a loosened ground in both areas was designed and executed. The analyzed cases have shown that methods of geophysical ground investigation based on electrical resistivity imaging provide accurate forecasting of the bedrock structure and can be used in practice to reliable determination of the threats to the ground surface from discontinuous deformations and their successful elimination.The authors of this article performed the following research and their interpretation independently. They have appropriate geological and geophysical qualifications and many years of practical experience. The above allowed us to present in this article the issue, the need to select and the course of geoengineering procedures in areas where, on the one hand, shallow mining operations were

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Section: Karst Processesmentioning

confidence: 99%

Application of Electrical Resistivity Tomography for the Assessment of Sinkhole Hazard to Improve Public Health and Safety Conditions on Post-Mining Lands

Jendruś,

Strozik,

Sowiński

2023

Pol. J. Environ. Stud.

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“…Geophysical approaches have also been used as alternative methods of investigation, with the advantage of reducing uncertainties related to superficial anthropogenic or natural modifications (Argentieri et al, 2015; Youssef et al, 2020). The material contrast between the sinkhole sediments and host rock (e.g., density, electrical resistivity, electrical permittivity) makes it possible to identify limits and underground geometries of pre‐existing karst, even in the absence of surface evidence (e.g., Kaufmann et al, 2014; Varnavina et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Geophysical surveys for non‐invasive characterization of sinkhole phenomena: A case study of Murisengo

Rita

Caselle

Comina

et al. 2023

Earth Surf Processes Landf

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The present research investigates the morphology and genetical mechanism of a sinkhole which occurred in 2019 in Murisengo (NW Italy). This landform is representative of several subsidence phenomena that often concern the Monferrato area (NW Italy). In concomitance with the appearance of the sinkhole at the surface, a cone of detrital material was found in the drifts of a nearby underground quarry. A geological survey was performed in the underground quarry in order to understand the interaction between the geological and geostructural features of the rock body and the generation of the sinkhole. Moreover, the underground sinkhole morphology was investigated through electrical resistivity tomography (ERT) surveys performed at the surface. The ERT outputs were combined to obtain a 3D image of the phenomenon and the 3D reconstruction was then compared with the geomorphological and structural setting of the area. Results suggest that a viscoplastic flow of clay‐rich sediments within a conduit in the gypsum bedrock (suffusion process) generated the sinkhole.

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“…The huge variations in the measurable physical properties (by many orders of magnitude), the wide range of overlap and spatial heterogeneity in near-surface material makes geological interpretations quite arbitrary. Moreover, each geophysical method has certain advantages and limitations, (e.g., Varnavina et al., 2019 ; Pazzi et al., 2019 ). However, there are certain cases in which geophysicists are contended to reduce volume of work or urged to use only one geophysical technique for the purpose of cost minimization.…”

Section: Introductionmentioning

confidence: 99%

Refraction seismic complementing electrical method in subsurface characterization for tunneling in soft pyroclastic, (a case study)

Fisseha

Mewa

Haile

2021

Heliyon

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The paper highlights the potential drawback of mapping a single geophysical property for subsurface characterization in potential engineering sites. As an exemplary case study, we present the geophysical survey conducted along the surface projection of a tunnel in the quaternary volcanic terrain of the Main Ethiopia Rift. Initially, geoelectrical mapping involving 12 Vertical Electrical Sounding (VES) and a short Electrical Resistivity Imaging (ERI) line, was carried out. The 1D geoelectric model indicates that the formation resistivity at tunnel zone varies from 50 to 500 Ω∙m. The corresponding value on 2D model, (>350 Ω∙m), is also compatible. Based on limited available geological information, the geoelectric horizon was attributed to weathered and variably saturated ignimbrite. Following unexpected encounter during excavation, refraction seismic and core drilling were carried out for additional insights. Tomographic analysis of the seismic arrival times revealed that below a depth of 45 m, (tunnel zone), the velocity substratum is marked by a range, (1200–1800 m/s). Such low velocity range is typical of unconsolidated materials and, thus, cannot rationalize the geoelectrical attribution (ignimbrite). In a joint interpretation, the likely formation that may justify the observed range of the electrical resistivity and low P-wave velocity appears to be unwelded pyroclastic deposit (volcanic ash). Eventually, core samples from the tunnel zone confirmed the presence of thick ash flow. However, the unexpected ground conditions encountered at the early phase, due to insufficient information derived from a single geophysical parameter, caused extra cost and considerable delay.

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Geophysical site assessment in karst terrain: A case study from southwestern Missouri

Cited by 9 publications

References 24 publications

Application of Electrical Resistivity Tomography for the Assessment of Sinkhole Hazard to Improve Public Health and Safety Conditions on Post-Mining Lands

Application of Electrical Resistivity Tomography for the Assessment of Sinkhole Hazard to Improve Public Health and Safety Conditions on Post-Mining Lands

Geophysical surveys for non‐invasive characterization of sinkhole phenomena: A case study of Murisengo

Refraction seismic complementing electrical method in subsurface characterization for tunneling in soft pyroclastic, (a case study)

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