Evaluation of the Amount of Boulder in the Pile as a Result of Blasting

Abdurrahman Tosun

Makale detayları

Evaluation of the Amount of Boulder in the Pile as a Result of Blasting

Yazarlar:

Abdurrahman Tosun

Yayıncı:

Dokuz Eylul University

Ana Başlıklar:

Maden Tasarımı | İşletme ve Ekonomisi

Dergi:

Kuzey Ege Teknik Bilimler ve Teknoloji Dergisi Vol.2 Issue 1, pp.51-60

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001340840

pISSN:

3062-1038

Anahtar kelimeler:

Özet:

 This study investigates the effects of specific charge and discontinuity spacing on boulder formation resulting from bench blasting in a limestone quarry. Ten full-scale blasts were carried out under controlled conditions, during which the amount of explosive per unit volume specific charge, the average spacing of discontinuities on the blast face, and the total mass of oversized boulders were systematically recorded. Uniaxial compressive strength UCS and unit volume weight of the rock were also determined through laboratory testing. The results revealed a strong inverse correlation between specific charge and boulder quantity R²  0.75, indicating that increased energy input significantly reduces the formation of oversized fragments. Conversely, discontinuity spacing alone exhibited a weak correlation R²  0.12, suggesting that spacing without consideration of orientation and persistence is not a reliable predictor. When both parameters were evaluated together, the predictive power increased notably R²  0.80, highlighting the importance of their combined influence. The findings offer practical guidance for optimizing blast design to minimize oversize material, improve loading safety, and reduce secondary breakage costs. Maintaining specific charge levels above 0.380.40 kgm³ in similar geological conditions is recommended. Further studies incorporating joint orientation and fracture properties are encouraged.

 This study investigates the effects of specific charge and discontinuity spacing on boulder formation resulting from bench blasting in a limestone quarry. Ten full-scale blasts were carried out under controlled conditions, during which the amount of explosive per unit volume specific charge, the average spacing of discontinuities on the blast face, and the total mass of oversized boulders were systematically recorded. Uniaxial compressive strength UCS and unit volume weight of the rock were also determined through laboratory testing. The results revealed a strong inverse correlation between specific charge and boulder quantity R²  0.75, indicating that increased energy input significantly reduces the formation of oversized fragments. Conversely, discontinuity spacing alone exhibited a weak correlation R²  0.12, suggesting that spacing without consideration of orientation and persistence is not a reliable predictor. When both parameters were evaluated together, the predictive power increased notably R²  0.80, highlighting the importance of their combined influence. The findings offer practical guidance for optimizing blast design to minimize oversize material, improve loading safety, and reduce secondary breakage costs. Maintaining specific charge levels above 0.380.40 kgm³ in similar geological conditions is recommended. Further studies incorporating joint orientation and fracture properties are encouraged.

 This study investigates the effects of specific charge and discontinuity spacing on boulder formation resulting from bench blasting in a limestone quarry. Ten full-scale blasts were carried out under controlled conditions, during which the amount of explosive per unit volume specific charge, the average spacing of discontinuities on the blast face, and the total mass of oversized boulders were systematically recorded. Uniaxial compressive strength UCS and unit volume weight of the rock were also determined through laboratory testing. The results revealed a strong inverse correlation between specific charge and boulder quantity R²  0.75, indicating that increased energy input significantly reduces the formation of oversized fragments. Conversely, discontinuity spacing alone exhibited a weak correlation R²  0.12, suggesting that spacing without consideration of orientation and persistence is not a reliable predictor. When both parameters were evaluated together, the predictive power increased notably R²  0.80, highlighting the importance of their combined influence. The findings offer practical guidance for optimizing blast design to minimize oversize material, improve loading safety, and reduce secondary breakage costs. Maintaining specific charge levels above 0.380.40 kgm³ in similar geological conditions is recommended. Further studies incorporating joint orientation and fracture properties are encouraged.

 Bu çalışma, bir kalker ocağında yapılan basamak patlatmaları sonucunda oluşan iri blok miktarı üzerinde özgül şarj ve süreksizlik aralığının etkilerini incelemektedir. Kontrollü koşullarda gerçekleştirilen on adet tam ölçekli patlatma kapsamında, birim hacim başına düşen patlayıcı miktarı özgül şarj, patlatma yüzeyindeki ortalama süreksizlik aralığı ve oluşan iri blokların toplam kütlesi sistematik olarak kaydedilmiştir. Ayrıca kayaçların tek eksenli basınç dayanımı TEBD ve birim hacim ağırlığı laboratuvar testleriyle belirlenmiştir. Elde edilen veriler, özgül şarj ile iri blok miktarı arasında güçlü bir ters yönlü ilişki R²  0.75 olduğunu ortaya koymuştur. Diğer yandan, süreksizlik aralığı tek başına zayıf bir ilişki göstermiştir R²  0.12; bu da süreksizliklerin yalnızca aralıklarına bakılarak iri blok oluşumunun güvenilir biçimde tahmin edilemeyeceğini göstermektedir. Her iki parametrenin birlikte değerlendirilmesiyle modelin öngörü gücü belirgin şekilde artmıştır R²  0.80. Sonuçlar, patlatma tasarımında özgül şarjın jeolojik yapı ile birlikte optimize edilmesinin, iri parça oluşumunu azaltmada etkili olduğunu göstermektedir. Benzer jeolojik koşullarda özgül şarj değerinin 0.380.40 kgm³ üzerinde tutulması önerilmektedir. Gelecek çalışmalarda süreksizlik yönelimi ve sürekliliği gibi yapısal faktörlerin de modele dahil edilmesi tavsiye edilmektedir.

Makale detayları

Evaluation of the Amount of Boulder in the Pile as a Result of Blasting

Yazarlar:

Abdurrahman Tosun

Yayıncı:

Dokuz Eylul University

Ana Başlıklar:

Maden Tasarımı | İşletme ve Ekonomisi

Dergi:

Kuzey Ege Teknik Bilimler ve Teknoloji Dergisi Vol.2 Issue 1, pp.51-60

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001340840

pISSN:

3062-1038

Blasting

boulder

hydraulic breakerPatlatma

patar

hidrolik kırıcı

Sayı

Makale detayları

Evaluation of the Amount of Boulder in the Pile as a Result of Blasting

Yazarlar: Abdurrahman Tosun

Yayıncı: Dokuz Eylul University

Ana Başlıklar: Maden Tasarımı | İşletme ve Ekonomisi

Dergi: Kuzey Ege Teknik Bilimler ve Teknoloji Dergisi Vol.2 Issue 1, pp.51-60

Belge Tipi: Makale

Yayın Tarihi: 6/2025

Belge Dili: İngilizce

Document ID (Org No.): 2001340840

pISSN: 3062-1038

Blasting

boulder

hydraulic breakerPatlatma

patar

hidrolik kırıcı

Sayı

Yazarlar:

Abdurrahman Tosun

Yayıncı:

Dokuz Eylul University

Ana Başlıklar:

Maden Tasarımı | İşletme ve Ekonomisi

Dergi:

Kuzey Ege Teknik Bilimler ve Teknoloji Dergisi Vol.2 Issue 1, pp.51-60

Belge Tipi:

Makale

Yayın Tarihi:

6/2025

Belge Dili:

İngilizce

Document ID (Org No.):

2001340840

pISSN:

3062-1038