... of seismic events, which are the velocity of a reduced center of seismic energy release and the apparent velocity of "migration" of individual seismic events closely timed within the ranges of stress concentration zones inside the mine fields. Verification of this criterion using an ample seismic data base...

... fracture permeability, and we investigated interactions of hydraulic fractures and natural fractures by varying the angle of approach and viscosity of the fracturing fluid. We also investigated seismic events evolving in a complex fracture network. The results demonstrate that our modelling tool is able...

... Abstract Strong mining seismic events are the source of very high values of peak particle velocity (PPV) recorded in near wave field. The high value of PPV and in low frequency band can exert high dynamic load on the support and underground excavation. As a result of significant increase...

...; averagely in each year one seismic event with magnitude higher than 6.0 and every ten years an event with magnitude of about 7.0 (Amini Hosseini et al., 2009). In most of the recent seismic events in Iran and all around the world, some types of geological hazards were also triggered by ground shaking...

... Abstract On 27 December 2007 a M w 1.9 seismic event occurred in the Mponeng gold mine, South Africa. The seismic event's hypocentre, as well as the fore- and aftershocks were located with the JAGUARS acoustic emission array, placed at mining level 116. Thus, hypocentre depth (3509 m...

... Abstract As mining operations go deeper, along with an increase of on-situ stresses, faults may be reactivated and seismic events may be induced. This paper describes several cases of mining induced seismic events and focuses on the strength of faults. From stress analyses it is known...

... of the locations of fault-slip, Alber et al. (2008) attempted to associate mining activities with the occurrence of seismic events in geological structures. Owing to the studies, better understanding of fault slip related seismic events has been achieved. However, fault-slip burst is a dynamic phenomenon, which...

... for 20 hours. Spatio-temporal distribution of fluid pressure, injection/production induced seismic events, their magnitudes and source characters are investigated. The simulation shows that production induced seismic events mostly occur along the line at steep fluid pressure gradient with mostly...

... Abstract The main objective of the presented analyses is to find the bridge between the solutions of the geomechanical and related geophysical problems addressed to the selected archival seismic events. This permitted finding such geomechanical formulae, involving components of rock mass...

... with different charge capaci- ties. The relation between ore blasting and seismicity in mines is considered here based on data on mine seismicity variations after explosions in Tashtagol Iron-Ore Mine (Russia). The seismic monitoring station Tashtagol records annually to 1500 seismic events in average...

... Abstract: Large scale stress redistribution around longwall panels in coal mines put rock masses in vicinity of the underground excavations close to failure. While immediate failure is reflected for example by instantaneous seismic events there is also a delayed response of the rock mass...

... is located at 1045 m. A new haulage level is currently under construction at 1365 m 2 TURNING SEISMICALLY ACTIVE In 2007-10-03 at 13:46 a large seismic event with mL=2.3 took place in Block 33 with large rock falls as a consequence. The mining was underway on level 907 but the rock falls took place on two...

... and induced seis- micity. For this purpose, the commercial software Particle Flow Code 2D is used with additionally implemented fluid flow algorithms and seismicity calculation scheme. Spatial and temporal distributions of induced seismic events are compared with migra- tion pattern of the injected fluid...

... network allows to detect the seismic events with M 0.9 representatively. It was shown that most of the seismic events, as well as the seismic energy release are related with the mining combined operation hours. The space distribution of seismic events shows that 80% of all events are occurred near...

... all using hydrofrac and treated overcoring methods during last ten years. It's becoming apparent that for information of recent stress fields is usable the interpretation of focal mechanisms of energetic significant mine induced seismic events, which were observed here more than ten years. The aim...

... DMT GmbH & Co. KG, Essen, Germany ABSTRACT: Coal mining by the longwall method typically causes seismic events. This paper describes the research on mining induced seismicity in two mines. One mine experienced a steady occurrence of mining induced seismic events of magnitudes ML < 2.4 around...

... ABSTRACT: In this paper the mechanism of seismic events induced by reservoir stimulation in EGS and Petroleum Engineering are studied and compared. For releasing of deformation energy there are the necessary and sufficient conditions, which must be satisfied. But for a great deformation energy...

... for mining of the inclined seams (angle more then 20 degree) for the depth more then 300 m. Induced seismic-ity is the best tool for detection and control stability of underground openings. metals &amp; mining september 2006 seam seismic event ground surface deviation mining method Upstream Oil...

... on real geological and seismological conditions. Region of Karvina part of the Upper Silesian Basin, North Moravia, in which intensive mining induced seismic events are documented for a long time (Holub 1995, Kalab &amp; Knejzlik 2002), is our test area. Underground exploitation of black coal...

... structural geology stability flaw metals &amp; mining surface subsidence kinetic approach Reservoir Characterization fracture process seismic event seismicity monitoring Kazakhstan forecast pillar cumulative number Artificial Intelligence crater subsidence failure process case...