Daftar isi - iv

DAFTAR ISI

ABSTRAK ..................................................................................................... i

KATA PENGANTAR …… ........................................................................... ii

DAFTAR ISI .................................................................................................. iv

DAFTAR GAMBAR ..................................................................................... vii

DAFTAR TABEL ......................................................................................... viii

DAFTAR GRAFIK ......................................................................................... ix

DAFTAR LAMPIRAN ................................................................................. x

BAB I PENDAHULUAN

1.1 Latar Belakang ........................................................................... 1

1.2 Maksud Dan Tujuan.................................................................... 2

1.3 Batasan Masalah ....................................................... …………. 2

1.4 Manfaat Penelitian ..................................................................... 3

1.5 Alat Dan Bahan .......................................................................... 3

1.6 Waktu, Lokasi Dan Kesampaian Daerah ................................... 3

BAB II TINJAUAN PUSTAKA

2.1 Deskripsi Perusahaan ................................................................. 8

2.1.1 Sejarah PT. Mandala Karya Prima (MKP) ................................ 8

2.1.2 Data Umum Perusahaan ............................................................. 8

2.2 Keadaan Geologi ….................................................................... 9

2.2.1 Keadaan Morfologi Regional ..................................................... 9

2.2.2 Keadaan Stratigrafi Regional .. ................................................... 10

2.2.3 Struktur Geologi Regional .......................................................... 12

2.3 Geologi Lokal Dan Sumberdaya Batubara . ............................... 12

2.3.1 Kondisi Morfologi Lokal ............................................................ 12

2.3.2 Kondisi Stratigrafi Lokal............................................................. 12

2.3.3 Kondisi Struktur Geologi Lokal.................................................. 15

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2.3.4 Sumberdaya Batubara ................................................................... 16

2.4 Kualitas Batubara ......................................................................... 16

2.5 Iklim Dan Curah Hujan ................................................................ 17

2.6 Aspek Teknis ............................................................................... 18

2.6.1 Metode Penambangan................................................................... 18

2.6.2 Sifat Fisik Material ..................................................................... 19

2.7 Aspek Mekanis ........................................................................... 23

2.7.1 Alat Gali-Muat (exavator) ............................................................ 24

2.7.2 Alat Angkut (Dump Truck) .......................................................... 25

2.8 Aspek Produksi ............................................................................ 28

2.8.1 Kapasitas Alat .............................................................................. 28

2.8.2 Pola Pemuatan ............................................................................. 31

2.8.3 Jalan Angkut (Ramp) ................................................................... 33

2.8.4 Tahanan Gulir (Rolling Resistance) ............................................ 35

2.8.5 Efisiensi Kerja ............................................................................. 36

2.8.6 Ketersediaan Alat (Availability) .................................................. 37

2.8.7 Keselarasan Alat (Macth Factor) ................................................ 38

BAB III METODOLOGI PENELITIAN

3.1 Tahapan Pengambilan Data .......................................................... 42

3.1.1 Tinjauan Pustaka .......................................................................... 42

3.1.2 Pengamatan Langsung Dilapangan .............................................. 42

3.1.3 Sumber data .................................................................................. 42

3.1.4 Pengolahan dan Alalisis Data ....................................................... 43

3.2 Tahapan Pengolahan Dan Analisis Data ...................................... 44

3.2.1 Teknik Pengolahan Data .............................................................. 44

3.2.2 Diagram Penelitian ....................................................................... 50

BAB IV HASIL PENELITIAN DAN PEMBAHASAN

4.1 Hasil Pengamatan ......................................................................... 51

4.1.1 Tahapan Penambangan ................................................................. 5

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4.1.2 Peralatan Mekanis yang diamati ................................................... 53

4.1.3 Waktu Edar alat (Cycle Time) ....................................................... 54

4.1.4 Waktu edar alat gali-muat ............................................................. 54

4.1.5 Waktu delay/lost time alat gali muat.............................................. 55

4.1.6 Efisiensi alat gali-muat................................................................... 57

4.1.7 Waktu Edar Alat Angkut................................................................ 58

4.1.8 Uji Petik ........................................................................................ 58

4.1.9 Faktor Pengisian Bucket (fill factor) ............................................. 59

4.1.10 Produktifitas Alat gali muat .......................................................... 60

4.1.11 Produktifitas Alat angkut Dump Truck HD 785-7 Spell board .... 60

4.1.12 Keselarasan Alat (Match factor) ................................................... 61

4.2 Pembahasan................................................................................... 62

4.2.1 Efisiensi Kerja Excavator PC 2000-8 ............................................ 62

4.2.2 Perbandingan Waktu Edar Unit Excavator PC 2000-8 .................. 63

4.2.3 Aspek Teknis yang mempengaruhi Produktifitas Excavator

PC 2000-8 ...................................................................................... 66

4.2.4 Aspek Teknis yang mempengaruhi produktifitas alat angkut........ 67

4.2.5 Truck cont HD 785-7 Spell Board Vessel ..................................... 69

4.2.6 Keselarasan Alat Mekanis ............................................................. 70

BAB V KESIMPULAN DAN SARAN

5.1 Kesimpulan ................................................................................... 69

5.2 Saran ............................................................................................. 70

DAFTAR PUSTAKA