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DAFTAR GAMBARGambar Halaman
1.1Peta Regional PT. Bukit Asam (Persero) Tbk, UPTE................................5
1.2Foto Udara Lokasi Pertambangan Tanjung Enim......................................6
1.3Stratigrafi...................................................................................................13
1.4Tahap Penyusunan Laporan Kerja Praktek...............................................25
2.1Pengaruh Arah Lubang Tembak................................................................37
2.2Sketsa pola pengeboran pada tambang terbuka.........................................39
2.3Pola Peledakan Corner Cut (Echelon).......................................................42
2.4Pola Peledakan V-Cut.................................................................................42
2.5Pola Peledakan Box Cut.............................................................................43
2.6Geometri Peledakan...................................................................................48
2.7Kalkulator Scaled Distance........................................................................49
2.8Blasting Machine.......................................................................................53
2.9Blasting Ohmmeter....................................................................................53
2.10Lead Wire...................................................................................................54
2.11Stick (Tongkat)..........................................................................................54
2.12Cangkul......................................................................................................55
2.13Detonator listrik.........................................................................................56
2.14Surface Detonator......................................................................................57
2.15Leg Wire....................................................................................................57
2.16Ammonium Nitrat......................................................................................58
2.17Daya Gel....................................................................................................58
2.18Plastik Linear.............................................................................................59
2.19Distribusi Energi Bahan Peledak...............................................................62
2.20Proses Pecahnya Batuan Akibat Peledakan...............................................64
2.21Contoh Rekaman Getaran Tanah Pada Arah.............................................69
2.22Blastmate III..............................................................................................70
2.23Variasi Pergerakan Partikel Karena Bentuk Gelombang Getaran (Dowding 1985).........................................................................................71
2.24Cara Monitor Getaran Oleh BlasmateIII....................................................72
2.25Mekanisme Pengukuran Getaran Dan Kebisingan....................................72
2.26Lintasan Tempuh Gelombang....................................................................77
2.27Grafik Baku Tingkat Getaran Peledakan Pada Tambang Terbuka Terhadap Bangunan...................................................................................84
2.28Pembersihan Drill Area..............................................................................85
2.29Mesin Bor Sandvik D245S........................................................................86
2.30Kode Lubang Bor.......................................................................................86
2.31Design Peledakan.......................................................................................87
2.32Pemasangan Danger Tag...........................................................................88
2.33Pengambilan Handak.................................................................................89
2.34Hauling Handak Ke Lokasi.......................................................................89
2.35Charging.....................................................................................................91
2.36Tie up.........................................................................................................92
2.37Evakuasi Dan Blocker Area.......................................................................92
2.38Penarikan Leadwire...................................................................................93
2.39Blasting......................................................................................................94
2.40Lokasi Pengukuran Getaran.......................................................................95
2.41Daerah Peledakan......................................................................................96
2.42Pemukiman/Perkantoran............................................................................96
2.43Pola Pemboran Staggered Pattern.............................................................97
2.44Jarak Pemukiman Bedeng Obak................................................................100
2.45Square Root Scaled Distance.....................................................................101