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ANALISIS PENGARUH GEOMETRI PELEDAKAN DAN DELAY TIME TERHADAP FRAGMENTASI DI LOKASI PNBP TAMBANG LIMESTONE QUARRY PT SEMEN PADANG (PERSERO), SUMATERA BARAT

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Penilaian

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PT Semen Padang (Persero), one of Indonesia's oldest cement producers, employs drilling and blasting for rock breakage. The company's fragmentation standard is 80% for fragments measuring up to 80 cm and 20% for those over 80 cm. Direct observation indicates a high presence of boulders and secondary blasting activities, with many blasts utilizing a single free face. An average of 71 blast holes were drilled daily from January to February. Based on data from 12 blasts, the estimated fragmentation larger than 80 cm was 2.86% using the Kuz-Ram equation, while actual fragmentation analyzed with Split Desktop 4.0 showed 5.60% of fragments exceeding 80 cm. Blasting with surface delays of 17 ms and 25 ms proved more efficient and effective than 25 ms and 67 ms delays, as it shortened the blasting time and resulted in 4.34% of fragments larger than 80 cm, compared to 14.83% with 25 ms and 67 ms delays, according to Split Desktop 4.0 analysis.

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Availability

Inventory Code	Barcode	Call Number	Location	Status
2507004696	T180740	T1807402025	Central Library (REFERENS)	Available but not for loan - Not for Loan

Detail Information

Series Title

03021282126060

Call Number

T1807402025

Publisher

Indralaya : Prodi Teknik Pertambangan Fakultas Teknik Universitas Sriwijaya., 2025

Collation

xvii, 117 hlm.; ilus.; tab.; 29 cm.

Language

Indonesia

ISBN/ISSN

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Classification

622.07

Content Type

Text

Media Type

unmediated

Carrier Type

-

Edition

-

Subject(s)

Teknik Tambang

Specific Detail Info

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Statement of Responsibility

MURZ

Other version/related

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