A Study on Controlled Blasting at A Quarry

Abstract

From all of the environmental problems, blast-induced vibrations often cause concern to surrounding residents. It is often claimed that damage to building superstructures is due to blasting, and sometimes the building owner files a lawsuit against the company that perform blasting operations. The blast-vibration problem has been thoroughly investigated in the past and continiues to be the subject of ongoing research. This study contains necessary work to ensure that detonations to be made in the quarry operating within highway project do not adversely affect to the karstic limestones at the depth of 9-10 m from the surace and groundwater. For this purpose, the vibration measurement and analysis have been carried out and a new methodology in minimizing the blast induced ground vibrations at the target location, was also applied. Peak particle velocity and dominant frequencies were taken into consideration in analyzing the blast-induced ground vibration. The methodology aims to employ the most suitable time delays among blast-hole groups to render destructive interference of surface waves at the target location.

Keywords

• Drilling and blasting,Blast-induced ground vibration,Peak particle velocity,Dominant frequencies

Ariyet Ocağında Kontrollü Patlatmalarla İlgili Bir Çalışma

Abstract

Patlatma kaynaklı titreşimler çevre sakinlerini, tüm çevresel sorunlardan daha fazla endişelendirmektedir. Bina üst yapılarına verilen zararın patlatmadan kaynaklandığı iddia edilmektedir ve bazen bina sahibi, patlatma işlemlerini gerçekleştiren şirkete karşı dava açmaktadır. Patlatma kaynaklı titreşim problemi geçmişte kapsamlı bir şekilde araştırılmış ve devam eden araştırmalara konu olmaya devam etmektedir. Bu makale, bir otoyol prosesi kapsamında faaliyet gösteren taş ocağında yapılacak patlatmaların yüzeyden 9-10 m derindeki karstik kireçtaşlarına ve yeraltı sularına herhangi bir olumsuz etki etmemesi için gerekli çalışmaları içermektedir. Bu amaçla, titreşim ölçümü ve analizi yapılmış ve hedef bölgedeki patlatma kaynaklı yer titreşimlerini en aza indirgeyen yeni bir metodoloji uygulanmıştır. Patlatmanın neden olduğu zemin titreşiminin analizinde tepe partikül hızı ve baskın frekanslar dikkate alınmıştır. Metodoloji, hedef bölgedeki yüzey dalgalarının tahribatlı etkileşimini sağlamak için patlatma deliği gruplamaları arasında en uygun zaman gecikmelerini kullanmayı amaçlamaktadır.

Keywords

• Delme ve patlatma,Patlatma kaynaklı zemin titreşimi,Tepe parçacık hızı,Baskın Frekanslar

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