Abstract This paper describes the design and implementation of an Information Technology (IT)-bas... more Abstract This paper describes the design and implementation of an Information Technology (IT)-based system called AMADEUS for adaptive and real-time geologic mapping, analysis, and design of underground space. Advances in IT, particularly in digital imaging, data management, visualization and computation can significantly improve analysis, design and construction of underground excavations. Using IT, real-time data on geology and excavation response can be gathered during the construction using non-intrusive ...
... Day of Backfilling, Day) Figure 4 Recorded Vertical Pressures on the Culvert Roof with Backfi... more ... Day of Backfilling, Day) Figure 4 Recorded Vertical Pressures on the Culvert Roof with Backfill Height above ... The influence of compaction equipment on the lateral pressure can be identified as the ... This is followed by a period of stress relaxation with residual stresses differing at ...
International Journal of Rock Mechanics and Mining Sciences, 2001
A two-dimensional model of fracture permeability normal to bedding in layered rock with orthogona... more A two-dimensional model of fracture permeability normal to bedding in layered rock with orthogonal, bed-delimited fractures is investigated. Steady-state, saturated laminar flow is assumed. Permeability is assumed to be a function of apertures and flow path lengths in an otherwise impermeable matrix. Bedding planes or other separations between layers are modeled as fictitious interlayers to render a layered fractured rock
ABSTRACT: A vast amount of various geotechnical data is obtained during the tunneling process. Us... more ABSTRACT: A vast amount of various geotechnical data is obtained during the tunneling process. Use of this data in design and construction can be enhanced by visualization so that the geological data can be seen as it would be seen in the underground excavation, either before or during excavation. The Adaptive Real-Time Geological Mapping Analysis of Underground Space (AMADEUS) project involves research on how to utilize new geologic information that is captured during tunnel excavation using laser scanning devices, digital ...
Proceedings of the Institution of Civil Engineers - Ground Improvement
Surface mine operations in the southern Appalachian mountains of the USA have left numerous unsta... more Surface mine operations in the southern Appalachian mountains of the USA have left numerous unstable or marginally stable waste rock slopes. These slopes, which were created by dumping waste material downslope, comprise low-density, random-size material ranging from clay particles to boulders, and often include debris such as trees and stumps. Typical remediation measures include reducing the slope angle or constructing expensive retaining structures. An investigation was conducted to evaluate the effectiveness of soil nailing in these waste rock slopes. A slope that had failed previously was cut back and stabilized with soil nails. The lower portion of the slope was steepened from the existing 1H:1V slope to about 1H:3·7V (75°), thus creating a ‘cut slope’ requiring support to maintain stability. Rather than facing with shotcrete, an erosion control material was placed on the slope, and geogrid facing material was applied over the steeper portions of the slope. The slope was monito...
Analyzing the stability of rock slopes involves predicting the sliding stability of blocks formed... more Analyzing the stability of rock slopes involves predicting the sliding stability of blocks formed by planes of weakness within the rock mass. Plane and wedge sliding analyses, for which there are one and two sliding surfaces, respectively, have been widely used for the last thirty years. For these slides, given certain assumptions, the distribution of normal forces on the contact planes is staticallydeterminate. The resisting and driving forces may then be calculated by limiting equilibrium methods and the factor of safety determined directly. Certain geologic environments, however, especially those of folded rocks, produce potential failures which cannot be modeled as either plane or wedge slides. In these slopes the sliding of blocks may occur along non-planar surfaces. Standard rock stability analysis methods presently available are not adequate to treat these folded rock slopes. For this reason, a new energy model has been developed that can analyze the stability of a rock block...
Abstract This paper describes the design and implementation of an Information Technology (IT)-bas... more Abstract This paper describes the design and implementation of an Information Technology (IT)-based system called AMADEUS for adaptive and real-time geologic mapping, analysis, and design of underground space. Advances in IT, particularly in digital imaging, data management, visualization and computation can significantly improve analysis, design and construction of underground excavations. Using IT, real-time data on geology and excavation response can be gathered during the construction using non-intrusive ...
... Day of Backfilling, Day) Figure 4 Recorded Vertical Pressures on the Culvert Roof with Backfi... more ... Day of Backfilling, Day) Figure 4 Recorded Vertical Pressures on the Culvert Roof with Backfill Height above ... The influence of compaction equipment on the lateral pressure can be identified as the ... This is followed by a period of stress relaxation with residual stresses differing at ...
International Journal of Rock Mechanics and Mining Sciences, 2001
A two-dimensional model of fracture permeability normal to bedding in layered rock with orthogona... more A two-dimensional model of fracture permeability normal to bedding in layered rock with orthogonal, bed-delimited fractures is investigated. Steady-state, saturated laminar flow is assumed. Permeability is assumed to be a function of apertures and flow path lengths in an otherwise impermeable matrix. Bedding planes or other separations between layers are modeled as fictitious interlayers to render a layered fractured rock
ABSTRACT: A vast amount of various geotechnical data is obtained during the tunneling process. Us... more ABSTRACT: A vast amount of various geotechnical data is obtained during the tunneling process. Use of this data in design and construction can be enhanced by visualization so that the geological data can be seen as it would be seen in the underground excavation, either before or during excavation. The Adaptive Real-Time Geological Mapping Analysis of Underground Space (AMADEUS) project involves research on how to utilize new geologic information that is captured during tunnel excavation using laser scanning devices, digital ...
Proceedings of the Institution of Civil Engineers - Ground Improvement
Surface mine operations in the southern Appalachian mountains of the USA have left numerous unsta... more Surface mine operations in the southern Appalachian mountains of the USA have left numerous unstable or marginally stable waste rock slopes. These slopes, which were created by dumping waste material downslope, comprise low-density, random-size material ranging from clay particles to boulders, and often include debris such as trees and stumps. Typical remediation measures include reducing the slope angle or constructing expensive retaining structures. An investigation was conducted to evaluate the effectiveness of soil nailing in these waste rock slopes. A slope that had failed previously was cut back and stabilized with soil nails. The lower portion of the slope was steepened from the existing 1H:1V slope to about 1H:3·7V (75°), thus creating a ‘cut slope’ requiring support to maintain stability. Rather than facing with shotcrete, an erosion control material was placed on the slope, and geogrid facing material was applied over the steeper portions of the slope. The slope was monito...
Analyzing the stability of rock slopes involves predicting the sliding stability of blocks formed... more Analyzing the stability of rock slopes involves predicting the sliding stability of blocks formed by planes of weakness within the rock mass. Plane and wedge sliding analyses, for which there are one and two sliding surfaces, respectively, have been widely used for the last thirty years. For these slides, given certain assumptions, the distribution of normal forces on the contact planes is staticallydeterminate. The resisting and driving forces may then be calculated by limiting equilibrium methods and the factor of safety determined directly. Certain geologic environments, however, especially those of folded rocks, produce potential failures which cannot be modeled as either plane or wedge slides. In these slopes the sliding of blocks may occur along non-planar surfaces. Standard rock stability analysis methods presently available are not adequate to treat these folded rock slopes. For this reason, a new energy model has been developed that can analyze the stability of a rock block...
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Papers by M. Mauldon