... 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...

... 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...

... 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...

... 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...

... as 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 developed...

... 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...

... 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 system...

... 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...

... 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...

... 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...

... 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...

... 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...

... Abstract This paper deals with the study of stoping parameters vis-a-vis rock mass behavior in an underground manganese mine situated in central India. Strain bars are installed at various locations in the mine as part of rock mechanics instrumentation programme to monitor rock mass movement...

... Abstract Roof and rib falls are still a leading cause of injuries in underground coal mines. When numerical simulation method is adopted to study this phenomenon, the influence of regular laminations on strength and size effect should be carefully considered because rock mass of roof...

... mining reaches the rock mass under the open-pit. This conclusion suggests that the protecting pillars' boundaries can be revised for the purpose of the further decrease. This will increase volume of reserves mined and efficiency of underground mining. 1. Introduction The Niorkpahk and Oleniy Ruchey...

..., directional drilling is a much more complex issue. The curvature of the wellbore's axis, passing through the horizontally stratified rock mass, causes the conditions around its cross section to be strongly anisotropic. Not infrequently, the same rock material of each layer exhibits anisotropic properties...

... Abstract Relatively accurate data regarding the temperature distribution in a rock mass can be obtained from measurements carried out in short boreholes drilled directly into mine workings. Such thermal field measurements were undertaken in selected mine workings in all active mines...

... extent. This hazard can be minimized by employment of active rockburst prevention, where long-hole destress blasts in roof rocks (torpedo blasts) have an important role. The main goal of these blastings is to either destress local stress concentrations in rock mass and to fracture the thick layers...

... 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-known solution addressing...

... 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...