eismic Impact of Massive Blasts on the Bridge and East-Slope of the Route-7: Case Study of Zhur

With reference to the discontent expressed by the ministry of infrastructure regarding the use of limestone at the exploitation quarry of company “Vellezerit e Bashkuar” located in Zhur Municipality of Prizren. The said complaints refer to the large seismic shakings and impact on the stability of the bridge and the eastern slope of the motorway. Therefore, we have decided to sustain seismic vibration measurements at the mentioned place. The parameters of the mining field have been included in the paperwork, along with the filling and sketches of the connection for the drilled holes. Based on the seismic measurements during the major blast, the parameters of seismic vibrations were obtained and resulted that the complaints are unfounded because the registration of seismic vibrations were maximum of 0.4 mm/s to 2.0 mm/s, whilst the allowed domain of frequency content is in the range of 6 to 10 Hz. The limit for the constructions of bridges is 5.0 mm/s, and for the slope degrees 20 mm/s. In order to achieve these reasonable results, the system with fuse was implemented for initiation of the blast field, and with this initial system we have slowed the sequences in between and slowed the drilling in the collocation. Therefore, the amount of the explosive material that detonates at the same time was significantly reduced.

Keywords:

Detonation, Initiation, Vibration, Seismic Nonel, Motorway,

PDF

___

Nuredini H, (1996) Teknika e sigurimit në minierë, Prishtinë. Mine security technique. Page 66-68, Pristine
Dzodič R, (1985) Tehnologija bušenja i miniranja, Prishtinë. Drilling and mining technology. Page 61-63, Pristine
Geci R, (2012) Raporti i matjeve të dridhjeve sizmike, valëve goditëse dhe zhurmës në fhatin Pasomë - Vushtrri. Instituti “INKOS” – Obiliq. Rapport of measurements of seismic vibrations, striking waves and noise in Pasoma village – Vushtrri. Institute “INKOS” – Obiliq.
Brahimaj I, (2008) Determining technical-economic parameters towards the advancement of massive detonations in exploring bauxites in Kosovo. M.Sc. thesis. Mitrovica.
Brahimaj I, (2012) Contribution in the selection of optimal parameters of massive detonations in the limestone deposits of Gremnik. Ph.D. thesis. Mitrovica
Brahimaj F, (2013) Appliance of contour blasting within road infrastructure Morine – Merdare. M Sc. Thesis. Mitrovica.
Brahimaj Sh, (2013) Opening and preparation of trenches on the highway Morine – Merdare. Msc. thesis. Mitrovica.
Gjorgjiev I, (2015) Assessment of blasting vibration impact on bridge structure and slope near motorway at Zhur – Kosovo, Skopje - Macedonia
DIN 4153-3, (1999) Structural Vibration: Effects of Vibration on Structures.
Rock Slopes, (1998) Chapter 9 – Blasting, Reference Manual. NHI Course No 13235 – Module 5. Publication No FHWA HI-99-007, Federal Highway Administration, National Highway Institute.