lithology (carbonatic rocks) were compatible with those of the case study area ( Table 4 ).
Main data of the seismicevents extracted from the database for the X-acceleration (above) and the Z-acceleration (below).
Epicentral Distance (km)
EC8 Site class
Epicentral Distance (km)
Djamel Bouri, Abdallah Krim, Abdelkader Brahim and Ahmed Arab
The city of Chlef located in the north of Algeria 200 km from the capital Algiers and these areas have experienced a great seismic activity and an unstable region. This city has known several destructive earthquakes (1922, 1934, 1954 and 1980) [ 16 ]. Among these earthquakes is that of Friday, October 10, 1980 afternoon at 1:30 pm, it is the most disastrous earthquake experienced by the Chlef city with a magnitude of 7.2 on the Richter scale. Belkhatir et al. [ 11 ] reported that this event caused significant damage to civil and hydraulic
Determination of original state of stress in rock mass is a very difficult task for rock mechanics. Yet, original state of stress in rock mass has fundamental influence on secondary state of stress, which occurs in the vicinity of mining headings. This, in turn, is the cause of the occurrence of a number of mining hazards, i.e., seismic events, rock bursts, gas and rock outbursts, falls of roof. From experience, it is known that original state of stress depends a lot on tectonic disturbances, i.e., faults and folds. In the area of faults, a great number of seismic events occur, often of high energies. These seismic events, in many cases, are the cause of rock bursts and damage to the constructions located inside the rock mass and on the surface of the ground. To estimate the influence of fault existence on the disturbance of original state of stress in rock mass, numerical calculations were done by means of Finite Element Method. In the calculations, it was tried to determine the influence of different factors on state of stress, which occurs in the vicinity of a normal fault, i.e., the influence of normal fault inclination, deformability of rock mass, values of friction coefficient on the fault contact. Critical value of friction coefficient was also determined, when mutual dislocation of rock mass part separated by a fault is impossible. The obtained results enabled formulation of a number of conclusions, which are important in the context of seismic events and rock bursts in the area of faults.
Karolina Adach-Pawelus, Jan Butra and Daniel Pawelus
zaburzeń tektonicznych na możliwość wystąpienia tąpnięcia (na przykładzie tąpnięcia w KWK ,,Pokój” w dniu 27.07.2006 r.) (Influence of mining events and tectonic disruptions on the possibility of rockburst occurrence (on the example of the rockburst in the “Pokój” hard coal mine on 27/07/2006)). Prace Naukowe - Monografie/CMG KOMAG Scientific Works (Monographs/CMG KOMAG), Gliwice 2007, (in Polish).
 LEACH A.R., LENHARDT W.A., Pillar associated seismicity at Western Deep Levels Mine. Static and Dynamic considerations in Rock Engineering, Brummer (ed
Krzysztof Skrzypkowski, Waldemar Korzeniowski, Krzysztof Zagórski, Ireneusz Dominik and Krzysztof Lalik
bolts affected by seismicevents. Rudy i Metale Nieżelazne 52(8), 459-463.
Dębkowski R. Madziarz M. Sawicki W. Osadczuk T. 2007 Measurements of load acting on expansive roof bolts affected by seismicevents Rudy i Metale Nieżelazne 52 8 459 463
 Fuławka, K., Mertuszka, P. & Pytel, W. (2018). Monitoring of the stability of underground workings in Polish copper mines condition s. E3S Web of Conferences 29, 1-14. Retrieved January 31, 2018, from EDP Sciences: http://www.e3s-conferences.org 10.1051/e3sconf/20182900008
, BC Canada, July 6-11, 2008, The International Society of Offshore and Polar Engineers (ISOPE), 2008, 743-748.
 MELZER K.J, BERGDAHL U., Geotechnical field investigations, [in:] U. Smoltczyk (ed.), Geotechnical engineering handbook, Vol. 1, Fundamentals, Ernst & Sohn Verlag, Berlin, 2002.
 MIWA S., AYDAN Ö., KOMADA H., KIYONO J., ENDO I., SUZUKI T., HAMADA M., Damage in Nias Island caused by the M8.7 off-shore Sumatra Earthquake, March 28, 2005, First European Conference on Earthquake Engineering and Seismology, A joint event
-eustatic sea level record: influence of glacial melting rates on the Younger Dryas event and deep-ocean circulation. Nature , 342, pp. 637–642.
 Stanley, D.I. (1995): A global sea level curve for the late Quaternary: the impossible dream? Mar. Geol. , 125, pp. 1–6.
 Vlahović, I., Tišljar, J., Velić, I., Matičec, D. (2005): Evolution of the Adriatic carbonate platform: palaeogeography, main events and depositional dynamics. Palaeogeogr., Palaeoclimatol., Palaeoecol. , 220/3–4, pp. 333–360.
 Marić-Đureković, Ž. (2011): Litofacijesne i