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Tommy Trides
universitas Mulawarman
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Evaluasi Powder Factor terhadap Jarak Lemparan Flyrock dengan Teori Ebrahim Ghasemi pada Hasil Peledakan di PT Bukit Baiduri Energi Provinsi Kalimantan Timur Perdi Perdi; Lucia Litha Respati; Albertus Juvensius Pontus; Revia Oktaviani; Tommy Trides
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 4 No. 4 (2026): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v4i4.1493

Abstract

Blasting activities in coal mining are carried out to fragment overburden material and improve excavation efficiency. However, blasting operations may generate environmental impacts, one of which is flyrock, which can endanger equipment, facilities, and personnel. This study aims to evaluate the influence of blasting geometry and powder factor on flyrock distance and to compare actual flyrock distances with predictions using the Ebrahim Ghasemi method at PT Bukit Baiduri Energi, East Kalimantan. The research was conducted through direct field measurements of blasting geometry parameters, including burden, spacing, stemming, free-face burden, and hole depth from 30 blasting events. The results showed that the actual flyrock distance had an average value of 25.37 m with a maximum distance of 47.01 m, while the Ebrahim Ghasemi prediction method produced an average distance of 24.70 m with a maximum distance of 40.80 m. Correlation analysis indicated that powder factor was the most influential parameter affecting flyrock distance, with a correlation coefficient (r) of 0.93 and a coefficient of determination (R²) of 0.8664, indicating a very strong relationship. An increase in powder factor tends to increase the flyrock distance. Therefore, proper control of blasting geometry and powder factor is essential to minimize flyrock risk and improve blasting safety.
PERHITUNGAN TONASE BATUBARA BERDASARKAN METODE MINE SURVEY DAN TRUCK COUNT DI PIT KUMALA PT. KHOTAI MAKMUR INSAN ABADI: COAL TONNAGE CALCULATION BASED ON MINE SURVEY AND TRUCK COUNT METHOD AT PIT KUMALA PT. KHOTAI MAKMUR INSAN ABADI Yosia Paonganan; Henny Magdalena; Tommy Trides; Windhu Nugroho; Agus Winarno
JURNAL TEKNIK PERTAMBANGAN Vol. 26 No. 2 (2026): Agustus, 2026
Publisher : JURUSAN TEKNIK PERTAMBANGAN UPR

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jtp.v26i2.27128

Abstract

Perhitungan tonase batubara merupakan parameter penting dalam evaluasi pencapaian produksi dan pengendalian kegiatan penambangan. Penelitian bertujuan membandingkan hasil perhitungan tonase batubara menggunakan metode mine survey dan truck count serta mengidentifikasi faktor-faktor penyebab perbedaan tonase pada kegiatan penambangan di Pit Kumala, PT. Khotai Makmur Insan Abadi. Penelitian menggunakan dengan data primer koordinat roof dan floor batubara hasil pengukuran Total Station serta data ritase dan timbangan sebagai data sekunder. Perhitungan tonase metode mine survey menggunakan cut and fill, metode truck count menggunakan data ritase dan timbangan. Identifikasi penyebab perbedaan tonase menggunakan analisis fishbone. Pada progres pertama, tonase mine survey untuk Seam 22 dan Seam 19 masing-masing sebesar 47.185,14 ton dan 5.768,56 ton, sedangkan truck count sebesar 45.846,64 ton dan 5.708,75 ton. Pada progres kedua, tonase mine survey sebesar 54.661,23 ton dan 4.653,49 ton, sedangkan truck count sebesar 53.313,09 ton dan 4.650,68 ton. Berdasarkan analisis fishbone, perbedaan tonase dipengaruhi oleh faktor manusia, lingkungan, metode pengukuran, dan karakteristik material. Selisih tonase yang diperoleh masih berada dalam batas toleransi operasional perusahaan, sehingga kedua metode dapat digunakan sebagai dasar evaluasi produksi dengan mempertimbangkan faktor-faktor yang memengaruhi akurasi perhitungan. Kata kunci: cut and fill, fishbone, mine survey, tonase batubara, truck count
Co-Authors Afdal Jamil Tanjung Agus Winarno Aisyatur Ridho Akbar Ilham Albertus Juvensius Albertus Juvensius Pontus Anakta Hartanta sebayang Ardhan Ismail Dean Ryanda Putra Desi Anggriani Farah Dinna Harjuni Hasan Harold Bombang Hasbi Trihatmanto Haviluddin Haviluddin Henny Magdalena Irianta Ibo Sembiring Joniardi , Lifia Kemala Dewi Lucia Litha Respati Lumban Tobing Bill Rexy Masayu Widiastuti Muhammad Dahlan Balfas Muhammad Hamzah Natasya Amanda Putri Nur Qorima Azis Perdi Perdi Rety Winonazada Revia Oktaviani Revia Revia Oktaviani Roni Handoko Damanik Rydani Affandhi Saputra Shalaho Dina Devy Weggie Atanasius Tonapa Widya Indriani Windhu Nugroho windhu Yosia Paonganan