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Keywords: rock massif
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Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-144
..., are called rockburts. coalfield seam consequence overburden mechanism rock mass high overburden ptá�ek procedia engineering 191 Reservoir Characterization Czech prediction local prediction rockburst occurrence metals & mining deformation rock massif rockburst prevention...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-005
... measuring complex "Prognoz ADS" is installed on a number of burst hazard fields [1, 2]. It operates to measure and process the parameters of the geo-acoustic activity, which reflects changes in processes of deformation and redistribution of stresses in the rock massif under the influence of mining. To...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-193
... Abstract Rock bolts as construction elements are often used in underground civil engineering projects. We used Aydan finite elements for numerical description of rock bolt reinforcement and isoparametric bilinear finite elements for description of rock massif. We derived corresponding...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-061
... by the origin: man-caused and natural-resonance. It is shown that in the absence of amplitude modulation of microseismic background as a whole, an external disturbance coming from the environment, such as the tidal force causes responses of different rock massifs in the form of modulation of...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-100
... Abstract Underground mining requires preliminary knowledge of influence of disturbed rock massif equilibrium to the underground working face as well as to the ground surface. This fact poses requirement for determination of prognostic parameters values that describe the influence of mining...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-095
... presented in the fol- lowing form: F F F F Fsum k r m s= + + + (1) where Fk = resistance of material force on tooth during the most frequent cutting, Fr = friction force on contact surfaces of rock massif and cut- ting organ, Fm = resistance of fragmented mate- rial within the bucket and Fs...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-110
... redistribution in func-tion of time was performed for the longwall mining in lignite. Emphasising of this problem is also related to complex geology of rock massif in which mining is performed. The assessment of time that longwall face may be idle, was done by using finite elements nonlinear elastic-viscous...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-006
... modulus of artificial fillings is one-tenth or one-hundredth of elastic modulus of rock. metals & mining displacement extraction Directional Drilling safety factor rock massif stress state reservoir geomechanics Simulation horizontal stress stress distribution consecutive extraction...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-041
... 20% (approximately 1600 km 2 ) Reservoir Characterization rock massif karvina part consequence structural unit ostrava-karvina coalfield coal output stress field konecny metals & mining OKC roadway windup coal production Coal Mining coal seam reduction rock burst...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-062
... the large neighbourhood of the repository. PRINCIPAL IDEAS OF THE MODEL OF FLUID FLOW IN FRACTURED ROCK ENVIRONMENT The radioactive waste repository will be situated in the compact crystalline rock massif. Of course, a good and reliable numerical model of the fluid flow and transport in such...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-096
...). Reservoir Characterization Thickness seam operation metals & mining rock massif longwall gate strength rockburst coalfield additional stress elasticity coal seam burst event rock burst event underground rock burst roadway rock burst Coal Mining seam thickness roadway section...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-034
... region is implicating changes in configuration of stress-strain conditions in rock massif. Subsequently, overrun of limiting state of elastic parameters can evoked brittle fractures and radiation of seismic energy (mining induced seismic event). These events (called also seismic events, rock bursts...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-093
... ABSTRACT We have been engaged in the stress measurement in rock massif by the hydro fracturing method. This method enables measurement of stress in plane normal to the axis of borehole, when one of the principal stresses parallel to the axis is assumed. But, in complex geomechanical conditions...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2005, May 18–20, 2005
Paper Number: ISRM-EUROCK-2005-099
... ABSTRACT The contribution informs about practical application of a system of detecting and predicting of unfavourable stress conditions in rock massif with rockburst risk in Ostrava-Karvina coalfield. The geological and mining characteristics of the south part of carboniferous hard coal...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-071
... which the present displacements measured as several mrn/year are recorded. The rock massif is characterised by a high level of natural stresses, the maximum stress vector 635 0max= 19-20 MPa is oriented subhorizontally transverse to the striking of the rock layers; the vertical stresses 011 MPa. The...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-101
... in rock massif, which is why this element has been given an appropriate significance in the rock-mass classification (5 out of 11 classification parameters-Table 2). As to traffic corridors, it is important to note that most significant underground structures have been designed and are to be built in...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-059
... ABSTRACT: The measurement results are reported for shear at geological heterogeneities and geopotential variations in the rock massif on Kola Peninsula. Numerical modelling of stress state change at faults due to mining in rock massif was carried out using the model of solid body with...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 93, June 21–24, 1993
Paper Number: ISRM-EUROCK-1993-005
... of the rock masses and the linings being applied (Fotieva, 1974; Bulychev, 1989). According to those methods the lining and rock massif are considered to be elements of the integral deformable system. The design methods are based on the solutions of elasticity theory contact problems for an arbitrary...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 93, June 21–24, 1993
Paper Number: ISRM-EUROCK-1993-063
... ABSTRACT: The paper presented proposes methods for evaluating rock massif stability in constructing large underground openings. Two types of stability massif loss are discussed. First of all instability around large underground openings is conditioned by failure in some zones near the opening...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 93, June 21–24, 1993
Paper Number: ISRM-EUROCK-1993-105
... ABSTRACT: The rock massif strengthening using micro-reinforced shotcrete (MRS) with polypropylene fibers and prestressed bolts of high rigidity is presented in the paper. The results of carbonate rock complex classification and those obtained by geotechnical laboratory testing of rock samples...

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