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Keywords: rock mass
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-035
... detailed geological and geotechnical studies. The rock formations, which give shape to the slopes of the canyon, are very weathered. During the construction phases different kind of geological phenomena were faced, which threatened the overall stability such as: rolling rock masses, superficial sliding...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-057
... operator. The main rock mass characteristics considered to predict fragmentation from rock blasting (i.e. discontinuities' orientation and spacing) are obtained from each of these tools. Discontinuities' spacing has been assessed in photogrammetry models along a dense set of scanlines oriented in four...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-059
... damage zone (EDZ) with higher hydraulic conductivity than the undisturbed rock mass. This paper studies the groundwater pressure in the rock mass surrounding the Gevingåsen tunnel, a drill-and-blast railway tunnel in Trøndelag, Norway, lined in the walls and crown with an undrained lining structure...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-058
... a function of their hydraulic conductivity, mechanical properties and geometry is necessary for evaluation of the stability of the fractured rock mass. The stability and tightness of a hydrocarbon storage cavern in a fractured rock mass have been modelled using DISROC ® finite element code...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-007
... Abstract Anticipating the geomechanical behaviour of rock masses encountered, or expected to be encountered, during mining is essential to strategic and optimised geomechanical design procedures. This requires early understanding of the site geology and tailored geomechanical data collection...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-052
... A place within the rock mass remains supporting stresses in a state of equilibrium; when the excavation is carried out, an empty space is produced, redistributing the stresses and generating a new state of stresses. In some cases, the stresses exceed the strength of the rock, inducing gradual...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-066
... zone and etc. Among these purposes there is prevention from air filtering from the mine working into degassing boreholes. The sealing quality estimates the efficiency of the preliminary coal beds degassing. There is a problem of the air inflow into methane withdrawal point through the rock mass. A well...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-116
... Abstract Weak rock mass strength estimation is a long-lasting challenge associated with geotechnical engineering due to its complex nature and limited definition. Weak rock masses normally refer to low strength, highly fractured decomposed and tectonically disturbed rocks which have properties...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-131
... Abstract This paper applies a modified ubiquitous joint plane model (Modified Ubi) to describe the mechanical behavior of layered rock masses. The constitutive model is an implicit-continuum based one where the joints are smeared across the rock mass. This modified model concerns not only the...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-051
... were dipping around 80° counter-slope. Experience dictates that this sort of slopes tends to be unstable, at least in case of average to low quality rock masses. In this way, a stability analysis was due to analyze slope stability. The good quality granite rock mass in the slope was characterized...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-101
... monthly migration of reduced centers of seismic energy release within the mine fields, enabled development of a rockburst hazard criterion for individual rock mass areas. The prognostic criterion of the limiting state of a rock mass area is developed based on the ratio of kinematic characteristics of...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-091
... Abstract Bukov Underground Research Facility (Bukov URF) is designed to operate as a test site to assess the properties and behavior of the rock mass analogous to selected seven candidate sites in the Czech Republic. It is situated at a depth of about 600 m beneath Earth's surface, which...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-009
... observe or predict potential rock/coal burst hazardous areas within the rock mass in which mining operations are situated is to monitor the seismological activity in the demarcated area [1]. It is essential to identify the part of the rock mass where there is a higher number of high-energy tremors, or the...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-106
... Abstract Discontinuities play a key role in the mechanical, hydraulic and deformational behaviour of rock masses, frequently having a considerable influence on the stability of rock slopes. They can be characterized by several geometric parameters as the orientation, persistence, spacing, etc...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-025
...- strain geotechnical system; seismic monitoring device and nano-seismic array for detecting microseismic events on the cliff slope. The main objective of the experiment at this test site is to investigate precursors of rock mass failures by coupling remote and local sensors. The integrated monitoring...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-035
... Abstract The influence of discontinuities on the mechanical behavior of rock masses, demands a detailed knowledge about the geometrical properties of the existing discontinuity network. Traditional measurement techniques provide a rough knowledge about a discontinuity network but are also...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-015
... Abstract Boreability can be defined as the ability of a bore to penetrate a rock mass. Understanding the factors influencing boreability is critical for enhanced project planning and reduce geotechnical risk in an offshore shaft boring environment. Large diameter drills are used for offshore...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-041
... different loading modes on the pre-pick and pick stage. The connection between energy accumulation capability of the rocks and their strength and deformation characteristics has been established. The investigation results have been examined in respect to forecasting rockburst hazard in the hard rock mass...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-037
... distinctive limitations, such as limited space and strict safety requirements for the operated equipment. Usually hydraulic fracturing solves the following problems: coal bed methane complex reservoir coal seam gas wedge-shaped indenter transverse hydraulic fracture initiation rock mass coalbed...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-095
... slopes. Static loading has been induced in the model to simulate conditions of the prevailing rock mass. Again dynamic loading has been performed according to the expected peak ground acceleration in the area in order to simulate the slope mass condition during earthquake. According to kinematic result...

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