Ground-Penetrating Radar for Karst Detection in Underground Stone Mines

Baggett, Jonathan; Abbasi, Amin; Monsalve, Juan J.; Bishop, Richard C.; Ripepi, Nino; Hole, J. A.

doi:10.1007/s42461-019-00144-1

Cited by 10 publications

(6 citation statements)

References 17 publications

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“…The zone with the most negative natural potential value indicates the presence of shallow groundwater sources. This opinion was expressed by Baggett et al [54]; the smaller the potential for natural anomalies, the negative value. That is, the accumulation of water flow to the location is relatively large.…”

Section: Analysis Of Self Potential Data Interpretationmentioning

confidence: 87%

“…It has been verified by the results of community wells drilled on line 3 with an average depth of 15 m to 24 m. Another evidence is that the chargeability value is in moderate to high anomaly at that location. That indicates the limestone has undergone weathering, is filled with clay material, and is saturated with water [13,50,54,59,60]. In addition, at the same location, the negative natural potential anomaly is interpreted as a conduit path with a branching water flow direction.…”

Section: Discussionmentioning

confidence: 99%

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Identification of Karstification Zoning and Aquifer Channels in Karst Basin at Sendang Biru Beach, Malang-Indonesia: A Case Study

Wahid¹,

Sunaryo²,

Susilo³

et al. 2022

IJDNE

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Karst zoning and channel aquifers in the karst basin at Sendang Biru Beach, Tambak Rejo Village have been investigated. Sendang Biru Beach has a cave appearance as a karst morphological feature and is composed of limestone. Seasonal karst water sources come from springs, surface runoff, underground rivers, channels in valleys, basins, and slopes that often experience drought. The purpose of this study is to identify the presence of karst aquifers and karstification zones that are prone to damage or disasters in the karst environment. The method used is a geophysical combination of Electrical Resistivity Tomography (ERT), Induced Polarization (IP), and Self Potential (SP). The results showed that the eastern part's karstification zone was characterized by moderate to high resistivity and a chargeability zone with a moderate to high range. In addition, the existence of karst aquifer channels in the anomalous zone of low resistivity, high chargeability, and negative natural potential. This zone is located in the Qas Formation, with the water flowing from west to east and from west to south. The inundated karst aquifer that spreads in a circular pattern with different depths interspersed by limestone cracks causes a heterogeneous karstification process.

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Section: Analysis Of Self Potential Data Interpretationmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Identification of Karstification Zoning and Aquifer Channels in Karst Basin at Sendang Biru Beach, Malang-Indonesia: A Case Study

Wahid¹,

Sunaryo²,

Susilo³

et al. 2022

IJDNE

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“…4a and b [13]. On the other hand, the presence of karst features intersecting pillars poses an additional [12] pillar stability hazard as discussed by Baggett et al [14] and Soni et al [15,16]. The following section describes relevant geomechanical aspects necessary to design and evaluate pillar conditions in the CSM.…”

Section: Mining Methodsmentioning

confidence: 99%

Stochastic Continuous Modeling for Pillar Stress Estimation and Comparison with 2D Numerical, and Analytical Solutions in an Underground Stone Mine

Monsalve

Soni

Karfakis

et al. 2022

Mining, Metallurgy & Exploration

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Pillar collapses are events that due to their severe consequences can be classified as high risk. The design of pillars in underground room-and-pillar operations should migrate to risk-based design approaches. The authors of this work proposed a risk-based pillar design methodology that integrates stochastic discrete element modeling for pillar strength estimation, and stochastic finite volume modeling (FVM) for stress estimation. This paper focuses on the stochastic FVM component for stress estimation. The mining and geomechanical aspects of a case study mine (CSM) are described and pillar stresses are estimated by using three approaches: (1) analytical solutions, (2) 2D finite element modeling, and (3) 3D finite volume modeling. This operation extracts a 30° dipping deposit, which makes current underground stone mine design guidelines inapplicable for this CSM. This work compares results from each stress estimation approach and discusses uses the point estimate method as a simplified stochastic approach to evaluate the effect of rock mass elastic properties variability on pillar stress distribution. Results from this work show that the three estimation approaches lead to different estimations, possibly, due to the wide range of assumptions each estimation approach considers. It was also determined that the horizontal to vertical stress ratio has a significant impact on pillar stress magnitude. Therefore, it is recommended to perform in situ stress measurements, or assume worst-case-scenario values to account and reduce uncertainty due to this parameter. The stochastic stress estimation approach used in this paper provides results that can integrate a risk-based pillar design framework.

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“…At present, there are many geophysical methods used in karst exploration, such as surface electrical resistivity tomography (ERT), transient electromagnetic method (TEM), cross-hole ERT, ground-penetrating radar (GPR) (Baggett et al 2020). Each approach has its strengths and limitations.…”

Section: Introductionmentioning

confidence: 99%

Multi-depth and refined detection method of karst features under thick Quaternary sediments of subway lines

Han

Wang

et al. 2022

Preprint

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When the subway engineerings cross the karst area, the unfavorable geology may bring many potential safety hazards to the subway design, construction and operation. There is a wide range of karst distribution in southwest China. Extremely irregular karst area is distributed in the strata along the subway lines. The Quaternary sediments are thick, which greatly increases the difficulty of detection. A multi-depth refined detection method of karst features under thick Quaternary sediments is proposed in this paper. Firstly, the karst cavities and fractures in the shallow stratum of the study area are determined by ground-penetrating radar (GPR). Secondly, the mid-deep resistivity cross-sections are delineated using surface electrical resistivity tomography (ERT) and transient electromagnetic method (TEM). The principal component analysis (PCA) is used to fuse the resistivity data. The three-dimensional imaging is established to delineate the distribution of karst anomalies. As the information obtained by PCA is more comprehensive, the accuracy of geophysical interpretation is improved. The multi-depth refined detection of karst under thick Quaternary sediments on subway lines is realized through integrated analysis. This method has been applied in Changsha Metro Line 3 and achieved good practical results. It is of great application value for the karst tunnel treatment and the safe excavation.

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Ground-Penetrating Radar for Karst Detection in Underground Stone Mines

Cited by 10 publications

References 17 publications

Identification of Karstification Zoning and Aquifer Channels in Karst Basin at Sendang Biru Beach, Malang-Indonesia: A Case Study

Identification of Karstification Zoning and Aquifer Channels in Karst Basin at Sendang Biru Beach, Malang-Indonesia: A Case Study

Stochastic Continuous Modeling for Pillar Stress Estimation and Comparison with 2D Numerical, and Analytical Solutions in an Underground Stone Mine

Multi-depth and refined detection method of karst features under thick Quaternary sediments of subway lines

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