Ekonomi Peledakan Ver 1

EKONOMI PELEDAKAN (Perspektif Tambang Terbuka)

Disajikan dalam :KURSUS JURU LEDAK KLAS I

(22 Agustus 2008)

oleh :BAMBANG AGUNG

PT. DAHANA (PERSERO)

PUSDIKLAT TEKNOLOGI MINERAL DAN BATUBARAB A N D U N G

2 0 0 8

TUJUAN :

• Peserta memahami dan mampu mengaplikasikan perhitungan-perhitungan disesuaikan dengan site condition setempat.

• Dapat membedakan cara berhitung sebagai karyawan atau D&B Contractor

• Mengamalkan dan meneruskan ilmu yang diperoleh kepada rekan-rekan sekerja dalam rangka mencerdaskan kehidupan bangsa.

Siklus Penambangan Tambang Terbuka Menggunakan Bahan Peledak Komersial

BLASTING ECONOMIC

Blasting dianggap Optimum apabila :

Safety & Pertimbangan Lingkungan Maximum

Kombinasi Cost Drilling/Blasting, Loading/Hauling, Secondary Blasting & Crushing adalah seminimal mungkin.

Pengaruh blasting terhadap slope stability minimal.

Mengurangi frequency dan biaya break down dan perbaikan (akibat tight digging).

Mengurangi down time dan biaya regular maintenance.

COST ANALYSIS & PRODUCTIVITY

I. DRILLING & BLASTING COST DETERMINATION A. Drilling Cost Drilling Cost Parameter

Drill Area Preparation Cost Labour & Pattern Layout Cost Drill Equipment & Maintenance Cost Drill Consumable Cost Grouting Cost

Drilling Cost per meter / hole Drilling Cost per BCM / tonne Drilling Cost per hour B. Explosives Cost

Main Explosives (ANFO & Bulk Emulsion Explosives) Surface Initiation Trunk Line Delay Detonating Cord MS. Connector

Down the hole Primer Cost (Booster & Powergel)

In hole delay Explosives Cost per BCM / tonne Explosives Cost per hole

COST ANALYSIS & PRODUCTIVITY (cont.)

C. Charging Cost Labour Cost per tonne of explosives Labour Cost per BCM / tonne Labour Cost per hole

D. Dewatering Cost Pump Equipment & maintenance cost Liner cost Labour cost Dewatering cost per BCM / tonne Dewatering cost per hole

E. Miscellaneous Cost Explosives Magazine Bulk Explosives Bin MMU Cost OSP Cost Inventory Cost

Consumable Parts

* Lifetime of Bit

* Lifetime of Rod

* Lifetime of Coupling

* Lifetime of Shank

* Lifetime of Drifter

* Other Parts / Filter

Fuel, Oil, Grease

* Liter of Fuel / Hour

* Liter of Oil / Hour DRILLING COST* Kg of Grease / BCM

Depreciation

Mobilization / De~

Man Power

* Operations

* Mechanics

* (Pattern Layout)

Area Preparation

Workshop

Explosives

* ANFO / Bulk Explosives

* Surface Delay

* Inhole Delay

* Primer / Booster

* Initiation EXPLOSIVES COST* Transport / Insurance

Manpower

Dewatering

* Pump & Maintenance

* Liner

Miscellaneous

* Magazine

* Bulk Explosives Bin

* MMU

* OSP

* Anfo Mixer

Survey

Accomodation

Lighting Plant OTHER COST

Electric Wire

Light Vehicle / Truck

DR

ILL

ING

& B

LA

ST

ING

CO

ST

ANALISA PRODUKTIVITAS

A. SASARAN OPERATIONAL Aman Overall Cost paling murah Analisa Drilling & Blasting Cost sebagai bagian dari overall

cost yang tidak terpisahkan. Sempurnakan Blast Design berdasarkan overall productivity &

cost effectiveness. Drilling Machine Efficiency

B. BLASTING PERFORMANCE Design peledakan harus didasarkan pada overall productivity (PF & Cost). Cost Record (Drilling, Charging, Blasting) harus diperhatikan

pada setiap peledakan. Dibuat Graph Historical Cost.

ANALISA PRODUCTIVITY (cont.)

C. TRACKING PRODUKTIVITAS EXCAVATOR BIAYA EXCAVATION

Excavation Cost per BCM / tonne Bucket Fill Factor Bucket Filling Time Truck Loading Time Maintenance Time BCM / Tonnes Excavated per Shift

FAKTOR-FAKTOR YANG BERPENGARUH Derajat Fragmentasi Type Batuan Pengalaman & Skill Operator Kondisi Alat Kondisi Cuaca

ANALISA PRODUCTIVITY (cont.)

D. TRACKING CRUSHING PRODUCTIVITY Tentukan Crushing Cost /Productivity kondisi

sekarang. Tentukan batasan pada produksi :

Oversize Material No Material Available (lack of truck) Screen tersumbat tanah Menentukan pengaruh perbaikan fragmentasi terhadap kenaikan produksi/Produktivitas

Memonitor power consumption di primary crusher untuk tiap peledakan.

E. LAIN-LAIN Toe & Back Break Hitung BCM Digable Memodifikasi Design Peledakan Evaluasi Implikasi Overall Cost terhadap Modifikasi Design.

Overal Cost Excavation Cost

Explosives Cost Crushing Cost

Drilling Cost

BLASTING and PRODUCTIVITY

- B L A S T I N G -

ADVANTAGES :

Match for Production Increase Improve Productivity of Loading Unit Provide Flat Loading Point / Working

Bench Reduce Cost of Tyres & Spring

Reduce Overall Cost

DISADVANTAGES :

Permit Environmental In Certain Condition may produce

Boulders, Damage of Vessel of Dump Truck

Cost Comparison :

BLASTING ><

But

><

RIPPING

BLASTINGLOADINGHAULING

RIPPINGLOADINGHAULING

()

()

Selection Parameter is not just Rip ability Critical Parameter

Productivity Loading Unit Productivity Hauling Unit Production Rate / Digging Rate Maintenance Cost Down Time Surface Condition Overall Cost Opportunity Coal Exposed

SENSITIVITY ANALYSISLOADER CYCLE TIME

LOADING UNIT : EXCAVATORBUCKET CAPACITY : 4.4 Cu.MCYCLE TIME : 0.45 minutes

: 27 second

PRODUCTIVITY (27 second / pass)

PER HOUR = 50 minutes : 0.45 = 111 cyclesPER DAY = 18 hours/day x 111 cycles/hour

= 1,998 cyclesPER YEAR = 300 days x 1,998 cycles/day

= 599,400 cycles= 599,400 cycles x 4.4 cu meter

PRODUCTIVITY (28 second / pass)

PER HOUR = 50 minutes : 0.467 = 107 cyclesPER DAY = 18 hours/day x 107 cycles/hour

= 1,928 cyclesPER YEAR = 300 days x 1,928 cycles/day

= 578,400 cycles= 578,400 cycles x 4.4 cu meter

VARIANCES

PER YEAR = 2,637,360 – 2,544,960= 92,400 cu meter x 1.5 : 2.4= 57,750 BCMs

IF WE WERE CONTRACTOR & PAID : US$ 1 / BCM

LOSES = US$ 57,750 / year= Rp 490,875,000,- / year (kurs Rp. 8,500/$)

WORKSHOP

A. DRILLING COST• Oil & Lubricant Cost• Filter• Drill Accessories• Estimated Drilling Capacity• O & O Cost

B. EXPLOSIVES COST

C. APLIKASI• Desain Peledakan Dasar• Pola Peledakan – Handak 1• Pola Peledakan – Handak 2• Pola Baru – Handak 2• Explosives Cost (Kombinasi)

D. COST BUDGETING

KRITERIA HARTA TETAP

Digunakan dalam operasi

Tidak untuk dijual dalam kegiatan normal perusahaan

Masa manfaat >1 siklus operasi normal (>1 tahun)

Nilainya relatif tinggi

- AKIBAT-AKIBAT JIKA INVESTASI - POTENSI TIDAK DILAKSANAKAN. - KONSINYUITAS- SEWA, ATAU PERBAIKAN YANG - TREND PENJUALAN LAMA. - PESAING

- HARGA

NILAI INVESTASI

INTERN:- KECEPATAN DAN KELANCARAN KERJA.- PERBAIKAN MUTU- PRESTISE BISNIS- GAIRAH KERJAEKSTERN:- POLITIK, EKONOMI - SOSIAL - BUDAYA

NONKEUANGAN

ALTERNATIFLAIN

INVESTASI

KEUANGAN

TEKNIS

PASAR

SUKU CADANG DAN ALAT-ALAT- PERAWATAN- UMUR TEKNIS- KAPASITAS- TENAGA AHLI- PENGALAMAN-PENGALAMAN PERUSAHAAN

- PAY - BACK PERIOD- ACCT. RATE OF RETURN- DISSCOUNTED CASH FLOW

BIDANG USAHA

STRATEGI BISNIS

KEBIJAKAN

PENTINGNYA INVESTASI

Penggunaan sumber daya yang relatif besar

Dana ditanam dalam jangka panjang

Unsur ketidakpastian atas hasil pada waktu Y.A.D

Keberhasilan atau kegagalan pengembangan perusahaan untuk masa Y.A.D tergantung pada keputusan sekarang

METODE PENILAIAN INVESTASI

Metode Jangka Waktu Pengembalian (Payback Method)

Metode Hasil Pengembalian atas Harta(Accounting Rate of Return)

Metode Arus Kas Diskonto(Discounted Cash Flow) :a. Net Present Value (NPV)b. Profitability (PI)c. Internal Rate of Return (IRR)

AKTIVA TETAP TAHUN

Bangunan dan Prasarana 10 – 20

Instalasi Listrik dan Telekomunikasi 20

Mesin Pabrik dan Peralatan 8 – 10

Kendaraan dan Alat Angkut 5

Perlengkapan Pabrik dan Kantor 5 - 10

I – S D =

P

DEPRESIASI• Standard Akuntansi Keuangan

• Metode Garis Lurus (Straight Line Depreciation Method)

D = Nilai Depresiasi per tahunI = Nilai InvestasiS = Estimasi Nilai SisaP = Jangka Waktu Depresiasi

OIL AND L UBRICANT COST

CHANGE OIL COST OIL COST

NO. DESCRIPTION CAPACITY INTERNAL

(HOUR) (USD/ L ITER) (USD/ HOUR)

1 DI ESEL OI L 18 250 2 0.14

2 COMPRESSOR OI L 66 1500 2 0.09

3 AI R OI L 10 10 2 0.83

4 HYDRAUL IC OI L 95 1500 2 0.13

5 TRACTI ON OI L 1 1500 2 0.001

6 FEED GEAR OI L 5.3 1500 2 0.01

7 ORDI NARY GREASE 0.01 40 2 0.001

8 ROCK TOOL GREASE 0.02 8 16 0.04

TOTAL 1.242

FIL TER COST

CHANGE FIL TER COST FIL TER COST

NO. DESCRIPTION QUANTITY INTERNAL

(HOUR) (USD) (USD/ HOUR)

1 ENGINE OI L F I L TER 1 250 27 0.108

2 MAIN F I L TER ENGINE 2 1000 74 0.148

3 SAFE F I L TER ENGINE 2 2000 48 0.048

4 FUEL F I L TER 30 m 1 250 77 0.308

5 FUEL F I L TER 10 m 1 250 64 0.256

6 COMP OI L F I L TER 3 1500 20 0.04

7 MAIN F I L TER COMP 1 1000 74 0.074

8 SAFE F I L TER COMP 1 2000 48 0.048

9 OIL SEPARATOR 1 3000 527 0.176

10 HYDRO OI L F I L TER 1 1500 122 0.081

TOTAL 1.287

DRIL L ACCESSORIES

CHANGE COST COST

NO. DESCRIPTION QUANTITY INTERNAL

(HOUR) (USD) (USD/ DRIL L METER)

1 SHANK ADAPTER 1 2500 195 0.07

2 COUPL I NG SL EEV E 2 7000 59 0.02

3 EXTENSION ROD 2 7000 250 0.07

4 BUTTON BI T 3 1/ 2" 1 6000 256 0.04

TOTAL 0.20

PRODUCTION DRI L L METER / HR 45

DRI L L METER COST / HR 9

PARAMETER UNIT QUANTITY

MATERIAL SADIMENTARY ROCK- Specific Grafity TON / M3 2.2- Est. Compression Strenght BAR 1,400- Swell Factor 1.4

A. DRILLING PATTERN - Hole Diameter mm 89.0 - Burden Meter 3.7 - Spacing Meter 4.4 - Bench Height Meter 5 - Hole Depth Meter 6 - Angle Degree 0 - Sub Drilling Meter 1

B. EST. CYCLE TIME - Est. Penetration Meter/Minute 1.5 - Locate, Positioning & Collaring Minute/Hole 1.5 - Extent & Retract Rod Minute/Rod 1

TIME REQUIRED TO COMPLETE ONE DRILL HOLE- Rod Length Meter 3- Drilling Time Minute/Hole 4- Locate, Positioning & Collaring Minute/Hole 2- Extent & Retract Rod Minute/Hole 2- Total time to drill one hole Minute 8

WORKING CONDITION- Working Schedule HR/Shift 10

Shift/Day 2Days/Month 25Month/Year 12

- Non operative time HR/Shift 1- Long term utilization % 80- Drill rig availability % 90

CALCULATION RESULT- Net drill rig out put Drill meter/HR 45- Shift Capacity Drill meter/Shift 405- Normal Productivity Drill meter/Month 14,500

EST. RIG PRODUCTION BCM/MONTH 196,600

ESTIMATED DRILLING CAPACITY

PARAMETER UNIT QUANTITY

PRICE USD 101,000Residual Value % 20Net Depreciation Value USD 80,800

Life Time Year 5Life Time HR 30,000Annual Working Hours HR 6,000Interest, Tax, Insurance % 9

A. OPERATION - Depreciation USD/HR 2.7 - Interest, Tax, Insurance USD/HR 1.51 SUB TOTAL OWNERSHIP COST USD/HR 4.2

B. OPERATION - Duel Consumption Liter/HR 30 - Fuel Price USD/Liter 0.08 - Fuel Cost USD/HR 2.4

C. OIL & LUBRICANT COST USD/HR 1.24

D. FILTER COST USD/HR 1.28

E. SPARE PARTS - Spare Parts Factor % 40 - Parts Cost USD/HR 1.08

F. DRILL TOOL COST USD/HR 9

G. LABOUR - Operator USD/HR 0.92 - Helper USD/HR 0.46 SUB TOTAL LABOUR COST USD/HR 1.38

H. SUB TOTAL OPERATION COST USD/HR 15.88

TOTAL OWNERSHIP & OPERATING COST USD/HR 20.08

RIG PRODUCTION USD/HR 610

DRILLING COST USD/BCM 0.032

OWNERSHIP AND OPERATING COST

Surface Delay

Manpower / Shof Firer

ANFO / Emulsion Blend

In Hole Delay

Dayagel Magnum / Booster

Dewatering CostTranspor Cost / Permit Explosives

EXPLOSIVES COST

Aturan Dasar Desain Peledakan

"Rules of Thumb" Diam. lubang (D) kondisi lokal Rata2 Burden 20 - 40 D 30 D Spacing 1.1 - 1.4 B 1.25 B Subdrill 5 - 10 D 8 D Stemming 15 - 30 D 23 D

Menghitung:

Subdrilling

Burden Spacing Subdrilling Stemming Pow der factor

ANFO dia. lub. 102 mm 1 m = 6.48 kg

Tg. BenchBurden

Stemming

Disain Peledakan Dasar - Soal Latihan

1 Tinggi Bench (H) 6 m

2 Dia. Lubang (D) 0.102 m

3 Sudut kemiringan lubang 0 º

4 Burden ( 30 D ) (B) m (dibulatkan)

5 Spacing (1.25 B) (S) m (dibulatkan)

6 Subdrilling ( 8 D ) m (dibulatkan)

7 Stemming ( 23 D ) (T) m (dibulatkan)

8 Powder Factor

Panjang kolom isian = (panjang lubang (dg. Subdrilling) - panjang stemming) m

Isian per lubang = (panjang isian x kg/m) kg

Volume peledakan per lubang (BCM) = Burden x Spacing x Tinggi Bench m3

Berat peledakan per lubang (ton) = BCM x density batuan (@ 2.63) ton

Powder Factor = Kg/ m3

Isian per lubang

m3 per lubang

Soal Latihan - "Pengembangan Pola" - Batu Kapur

ANFO Diameter 102mm

3 x 3.75m Bench 6m

Stem 2.3m Subdrilling = 0.8m

Dabex

Subdrilling

Perbesaran Pola

Dabex dalam

pola ANFO

3 Hitung Pola peledakan baru dengan P.F. awal

1 2 4

ANFO DABEXDensity 0.8 1.2Energy (RWS) 100 115Cost /kg ($) 0.4 0.5kg / metre 6.48 9.72Drill cost / m ($) 2.5 2.5

DABEX : Dahana Bulk Emulsion Expl.

Dalam lubang 6.8m

tinggiBench 6m

Stemming 2.3m

Soal Latihan - "Pengembangan Pola" - Batu Kapur

Pertanyaan 1 Hitung biaya drill & blast lubang kering per BCM untuk lubang #1 (3.0 x 3.75m ANFO) Biaya sistem inisiasi per lubang: 1 In-hole + Surface Delay = $8.00. Primer dengan 1 Booster @ $ 3.50 ea.

Pertanyaan 2 Apabila lubang basah hitung Biaya D & B / BCM untuk Dabex menggunakan pola awal (3.0 x 3.75m)

Pertanyaan 3 Anda ingin meningkatkan produksi karena drilling tidak mampu mencapainya. Hitung pola baru untuk Dabex dengan Powder Factor dan stemming sama seperti pada pola ANFO.

Pertanyaan 4 Hitung biaya D & B / BCM untuk pola baru dengan Dabex

Pertanyaan 5 Bandingkan biaya 1 & 4 untuk 30% lubang basah

Soal Latihan : Pola Peledakan Q1 - ANFO

Panjang kolom ANFO

Tinggi bench + subdrilling - stemming = A metres

Berat ANFO per lubang = Panjang isian A x kg/m = B kg

Biaya bahan peledak & accessories per lubang

Biaya ANFO = B kg x $/kg = C $

Biaya Inisiasi per lubang = 1 Detonator in-hole + surface = D $

Primer (1 x Booster) ………….. = E $

Total biaya Handak & Accessories per lubang C + D + E = F $

Biaya drilling / lub. = Panj. Lub. x biaya/m = G $

Vol. peldkn per lub. (BCM) = Burden x Spacing x tg. bench = H m3

Biaya Drill & Blast per lub. = biaya Blast F + biaya Drill G = J $

Biaya D & B per BCM = biaya D&B J / vol. per lub. (BCM) H = K $

Pow der Factor = kg B / BCM H = kg/m3

Soal Latihan : Pola Peledakan Q2 - DABEX

Panjang kolom Dabex


Berat Dabex per lubang = Panjang isian A x kg/m = B kg


Biaya Dabex = B kg x $/kg = C $









Soal Latihan : Pola Peledakan Q3 - DABEX Baru

Target Pow der Factor …………………….. = A kg/m3

Pjg kolom isian Dabex = pjg lub. - stemming = B metres

kg Dabex per lub. = pjg isian B x kg/m = C kg/hole

BCM baru = kg/lubang C / Pow der Factor A = D BCM

BCM baru = Spacing baru x Burden baru x tinggi bench

Shg: Spacing baru x Burden baru = BCM baru D / tg. Bench = E m2

Oleh krn Spacing sama dengan Burden, maka B2 = E m2

Maka Spacing & Burden baru = m

Normalnya spacing = 1.1 s.d. 1.4 B

Katakanlah S = 1.25 B maka 1.25 B2 = E

B = m dan S = m

atau B x S = m

Soal Latihan : Pola Peledakan Q4 - DABEX Baru

Panjang kolom Dabex


Berat Dabex per lubang = Panjang isian A x kg/m = B kg


Biaya Dabex = B kg x $/kg = C $









S o a l L a t I h a n : P o l a P e n g e m b a n g a n Q 5

A N F O a w a l : B i a y a D & B l u b a n g k e r i n g = $ / B C M

D a b e x b a r u : B i a y a D & B l u b a n g b a s a h = $ / B C M

U n t u k 3 0 % l u b a n g b a s a h : b i a y a r a t a - r a t a D & BB i a y a l u b . K e r i n g x 0 . 7 + b i a y a l u b . B a s a h x 0 . 3

= $ / B C M

SCHEDULED

(S)

AVAILABLE

(A) MAINTENANCE

OPERATION (MT)

(OPT) IDLE UNSCHEDULED SCHEDULED

WORKING DALAYED (ID) MAINTENANCE MAINTENANCE

(WK) (DL) (UM) (SM)

Working Refeuling Ask to Standby Repairs Time Repairs Time

Bit Change Out No Operator Waiting Parts Waiting Parts

Blasting Meals and Rest Others Others

Walking Equipment Meeting

Waiting on Shovel Rain / Foggy

Waiting on Trucks Others

Supervision Delays

Blow-up wet holes

Lubricating / Greasing

Clean-up Loading Point

Pre-start Checking

Others

TIME CATEGORIZATION AND ACTIVITY CODES

Physical Availability = ( A / S ) x 100% Utilization = (OPT / A) x 100% Effectiveness = (WK / OPT) x 100%

No. Alat Tgl. Spasi Meterhour AwalNo. Pegawai Lokasi Burden Meterhour AwalNama Jenis Sudut

KegiatanKerja Perjalanan Ganti Pindah krn Pindah alat Semprot Persiapan Bor Istirahat Membantu Hujan Tidak ada Rusak Jadw al Nomor Dalam Keterangan

Jam Service Mata Bor Peledakan untuk kerja Lubang & Grease Terjepit Peledakan Pekerjaan Service Lubang Lubang

07.00

07.30

08.00

08.30

09.00 s.d 17.00

Operator Foreman / Supervisor Catatan/Laporan Kerusakan :

=________________________= =________________________=

KARTU ALAT BOR

DELAY (Mesin hidup tapi tidak nge-bor) MAINTENANCEIDLE (Mesin baik tapi tdk hidup)

STUDI KASUS

DATA:

Schedule Kerja = 10 jam/shift (1 shift/hari) Slang Hidrolik pecah dan perbaikan = 30 menit Hujan = 30 menit Peledakan (pindah lokasi pp 15 menit dan menunggu – mesin dimatikan – 15

menit) Menunggu persiapan lahan dan pemasangan pola (mesin mati) 15 menit. Istirahat 1 jam Pemanasan awal 5 menit Operator pulang 5 menit lebih cepat

HITUNG

PA (Physical Availability) UT (Utilization) EFF (Effectiveness) Overall Efficiency

QUANTITYASSUMPTION FOR

1998 MALOKO BUDGETPRODUCTION VOLUME LCMs (budgeted)

BCMs (+ 10% for sirdam)Period Length Days (see calender)Non-Production Day Days (see calender)Scheduled Day Days (see calender)

ATLAS COPCO (70% of Budget) 70% of Production- Pattern (Area) sq.meters 4.2 x 5.3 sq. meters- Bench height meters 15 meters- Number of Holes holes (calculated)- Total Meters Drilled (incl. 2 meter sub-drill) meters (calculated)- Drilling Rate m/hour 25.8- Total Working Hours hours (calculated)- Total Engine Hours hours 95 % Effectiveness- Total Scheduled Hours per day hours/day 90 % P.A & 80 % UT.

INGERSOLL RAND (30% of Budget) 30% of Production- Pattern sq.meters 3.7 x 4.6- Bench height meters 15 meters- Number of Holes holes (calculated)- Total Meters Drilled (incl. 2 meter sub-drill) meters (calculated)- Drilling Rate m/hour 19- Total Working Hours hours (calculated)- Total Engine Hours hours 82 % Effectiveness- Total Scheduled Hours per day hours/day 80 % P.A & 82 % UT.

I T E M Unit V/F

DRILLING AND BLASTING MATERIAL

DRILLING CONSUMABLE MATERIALA. DRILLING- Drill Bit pcs 3,855 meter/piece- Drill Rod pcs 3,427 meter/piece- Coupling Sleeve pcs 1,928 meter/piece- Shank Adapter pcs 13,218 meter/piece- Other Spare Parts - -- Fuel liters/engine hour 22- Grease engine hours/kg 10- Oil engine hours/liter 2.5

B. DRILLING - ENGERSOLL RAND- Drill Bit pcs 2,275 meter/piece- Drill Rod pcs 778 meter/piece- Coupling Sleeve pcs 713 meter/piece- Shank Adapter pcs 2,571 meter/piece- Other Spare Parts - -- Fuel liters/engine hour 30- Grease engine hours/kg 12- Oil engine hours/liter 3.0

BLASTING CONSUMABLE MATERIALA. EXPLOSIVES P.F = 0,29 Kg/Bcm- AN kgs (calculated)- Powergel Magnum kgs 2.9 % of ANFO- Blasting Others - -B. BLASTING ACCESSORIES- Electric Detonator bcms/pcs 191- Inhole Delay (No. 7 & 8) - 15 meters pcs (calculated)- Trunk Line Delay 17 ms - 6.1 meters pcs (calculated)- Trunk Line Delay 65 ms - 6.1 meters pcs (calculated)- Cordtex meters

COST

ASSUMPTION FOR1998 MALOKO BUDGET

DRILLING AND BLASTING COST

DRILLING CONSUMABLE COSTA. DRILLING - ATLAS COPCO- Drill Bit Rp/pcs 1,065,015 V- Drill Rod Rp/pcs 764,015 V- Coupling Sleeve Rp/pcs 200,434 V- Shank Adapter Rp/pcs 544,429 V- Other Spare Parts Rp/BCM 84.2 V- Fuel Rp/liter 415 V- Grease Rp/kg 31,875 V- Oil Rp/liter 4,338 VB. DRILLING - INGERSOLL RAND- Drill Bit Rp/pcs 798,798 V- Drill Rod Rp/pcs 473,100 V- Coupling Sleeve Rp/pcs 141,550 V- Shank Adapter Rp/pcs 484,950 V- Other Spare Parts Rp/BCM 61.4 V- Fuel Rp/liter 415 V- Grease Rp/kg 31,875 V- Oil Rp/liter 4,338 V

BLASTING CONSUMABLE COSTA. EXPLOSIVES (P.F = 0,29 Kg/Bcm)- ANFO Rp/kg 1,350 V- Powergel Magnum Rp/kg 8,500 V- Blasting Others Rp/BCM 3.8 VB. BLASTING ACCESSORIES- Electric Detonator Rp/pcs 3,873 V- Inhole Delay (No. 7) Rp/pcs 17,672 V- Trunk Line Delay 17 ms Rp/pcs 11,669 V- Trunk Line Delay 65 ms Rp/pcs 11,669 V- Cordtex Rp/meter 1,364 V

I T E M Unit V/F

LABOUR COST- Basic Salary & Allowance Rp/month 7,821,600 F- Overtime Rp/month 2,150,000 F- Makan Siang Rp/month 1,150,000 F- Health allowance for employee Rp/month see personnel reg. F- Health allowance for faimily Rp/month 2 x employee F- Insurance Rp/month 381,616 F- Safety device & Uniform Clothes Rp/month 200,000 F- Training Rp/month 1,000,000 FADMINISTRATION COST- Handling, Tax., Insurance Explosives Rp/month 3,571,425 V- Entertainment/Donation/Compensation Rp/month 454,425 V- Stationary Rp/month 355,750 VDEPRECIATION- Atlas Copco Rp/month 4,247,146 F- Ingersoll Rand Rp/month 3,070,833 F- Explosive Magazine Rp/month 1,655,689 F- Light Vehicle Rp/month 481,771 FTRANSPORT/LIGHT VEHICLE B9667BF Rp/month 1,313,771 VCONSULTING/SURVEYING Rp/month 2,606,250 V

TOTAL COST Rp

UNIT COSTBASED ON CRUSHER PRODUCT Rp/LCM

REAL DRILL & BLAST UNIT COST Rp/TonneRp/BCM

SUMMARYEXPLOSIVE, MAGNUM & OTHERS RpBLASTING ACCESSORIES RpPARTS/MAINTENANCE RpFUEL, OIL & GREASE RpADMINISTRATION RpLABOUR RpDEPRECIATION RpTRANSPORTATION RpCONSULTING & HIRE RpTOTAL COST Rp

FAKTOR-FAKTOR YANG HARUS MENJADI BAHANPERTIMBANGAN SEBAGAI D&B KONTRAKTOR

TRANSPORT COST (EXPLOSIVES) TERKAIT KAPASITAS GUDANG & LOKASI

MOD/DEMOB DRILLING, DLL UMUR KONTRAK TERM OF PAYMENT

TERKAIT COST OF MONEY PROFIT CORPORATE/DIVISION COST MODAL KERJA

TERKAIT COST OF MONEY MAN POWER (incl. Lay-off Karyawan) DEPRESIASI BUNGA BANK

.

WHY D & B CONTRACTOR ?

ADVANTAGES :• Customer more focus on production & marketing

• Sharing risk (due to uncertainty condition)

• Cash flow benefit

• Transfer of knowledge

• Quality

DISADVANTAGE :• Drill & Blast cost slightly higher

Ekonomi Peledakan Ver 1

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