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PEMETAAN KESTABILAN LERENG PADA LOKASI PENAMBANGAN EMAS PIT DURIAN PT J RESOURCES BOLAANG MONGONDOW SITE BAKAN KECAMATAN LOLAYAN KABUPATEN BOLAANG MONGONDOW SULAWESI UTARA Haryati, Osmaini Sutra; Kopa, Raimon; Prabowo, Heri
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
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PT J Resources Bolaang Mongondow (JRBM) adalah anak perusahaan PT J Resources Nusantara yang bergerak di bidang usaha pertambangan emas dengan metode tambang terbuka. Operasi produksi PT JRBM saat ini berpusat di site Bakan, Kecamatan Lolayan, Kabupaten Bolaang Mongondow Sulawesi Utara. Selama pengoperasian tambang sejak tahun 2013 telah terjadi beberapa kasus longsor di Pit Durian. Penelitian mengenai kondisi massa batuan terganggu di Pit Durian belum pernah dilakukan sehingga potensi longsor di area pit belum dapat diketahui.Pengamatan langsung di lapangan terhadap bekas bekas longsor menunjukkan bahwa terdapat kontrol struktur yang dominan dalam menghadirkan longsor. Secara geologi, site bakan merupakan zona yang mengalami alterasi hidrotermal. Proses alterasi mempengaruhi komposisi mineral dan kekuatan batuan sehingga secara tidak langsung juga memberikan kontribusi dalam terjadinya longsor. Penelitian ini menganalisis tingkat kestabilan lereng dan tipe potensi longsor yang hadir di Pit Durian serta kaitannya dengan tipe alterasi. Tipe potensi longsor di analisis secara kinematik sedangkan tingkat kestabilan lereng di analisis dengan metode klasifikasi rock mass rating (RMR) dan slope mass rating (SMR).Analisis dilakukan terhadap 102 klasifikasi segmen dan alterasi di pit Durian Tabung 3 pada elavasi 665mRL ? 680 mRL. 65% lereng berada dalam kondisi stabil (kelas SMR II), 25% segmen agak stabil (kelas SMR III), 6% tidak stabil (kelas SMR IV) dan 4% sangat tidak stabil (Kelas SMR V). Secara kinematik potensi longsor tipe topling hadir di 44% segmen lereng penelitian, sedangkan tipe planar 18%, tipe wedge 36% dan 35% tidak berpotensi longsor. Hasil analisis menunjukkan bahwa kestabilan lereng pada zona alterasi argilik dikontrol oleh karakteristik massa batuan sedangkan stabilitas lereng pada zona silisik dan argilik lanjut relatif dikontrol oleh struktur.Desain awal rekomendasi perkuatan lereng terhadap lereng yang tidak stabil disarankan berdasarkan Klasifikasi Romana (1985). Re-excavation disarankan untuk lereng yang sangat tidak stabil, pembuatan toe ditch disarankan untuk lereng yang agak stabil, dan sistematic shortcrete atau ekskavasi ulang disarankan untuk lereng yang tidak stabil. Hasil analisis keseluruhan diinterpretasikan dalam bentuk peta kerawanan longsor.
EVALUATION OF ACTUAL CONDITION AND PLANNING OF DRAINAGE SYSTEM IN GOLD MINING AT PIT DURIAN, SITE BAKAN PT. J RESOURCES BOLAANG MONGODOW, LOLAYAN SUB-DISTRICT, KOTAMOBAGU, NORTH SULAWESI Kurnia, Dian; HAR, Rusli; Prabowo, Heri
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Based on analysis of rainfall data in 2007-2016, rainfall is obtained from the plan of 149,70 mm/day with different rain intensity in each catchment area. 5-year rain recharge period and hydrogeological risk of 67.23%. At the research location, Pit Durian PT. JRBM, in 2017 has 4 catchment areas with different area, total discharge equal to 11.913,206 m3/hour, there are 2 sumps that is South 1 Sump and North Sump with maximum capacity of 12.702 m3 and 29.596 m3 and there is one Volvo KSB LCC-H 200-610 on each sump, there are three open channels and one main setling pond with different compartment capacity. After an evaluation of the mine drainage system in 2017, South 1 Sump requires an additional 2 units of Volvo KSB LCC-H 200-610 and North Sump pumps requiring additional pumps of 1 unit of Volvo KSB LCC-H 200-610 pump.In the planning of Pit Durian mine drainage system in 2018, Pit Durian has 7 catchment areas with different area with total discharge of 14,393,101 m3/hour, there is addition of sump to 5 sump namely South 1 Sump, South 2 Sump, South 3 Sump, North 1 Sump and North 2 Sump with capacity of each sump is planned for 33,485 m3, 40,745 m3, 35,399 m3, 11,565 m3 and 20,193 m3 and requires 1 unit of Volvo KSB LCC-H 200-610 pump on each sump. The of mine drainage system in 2018 is planned to have an open channel as well as a setling pond similar to 2017.
KAJIAN TEKNIS DAN EKONOMIS PERANCANGAN DESIGN KEMAJUAN PENAMBANGAN QUARRY BATUKAPUR PADA BULAN APRIL–AGUSTUS 2017 DI FRONT III B–IV B BUKIT KARANG PUTIH PT. SEMEN PADANG Ersyad, Fikriansyah; Yulhendra, Dedi; Prabowo, Heri
Bina Tambang Vol 3, No 3 (2018): JURNAL BINA TAMBANG
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PT. Semen Padang plans to expand mining area, especially in the Front III B-IV B. The limestone production target was planned is 550,000 tons / month. Long-term production target planning for all mining areas in 2017 for limestone is 10,128,000 tons, or increase 12.56 % and silicastone is 1,100,000 tons, or increase 10% from 2016. Production realization achieved in 2016 was only achieved 78.3% for limestone and 71.7% for silicastone. Less optimal achievement of production targets in 2016 due to inappropriate sequence factors, and irregularities in excavation. Planning for limestone mining in Front III B-IV B is based on technical and economical assessmnet in terms of quality and quantity of deposit. In order to maintain the quality of the limestone, it is necessary to know the amount of reserves and the distribution of the quality of limestone in a block model estimated by the geostatistical approach, namely the krigging method. Planning quarry design?s starts from April to August 2017. Combination of loader - hauler that is used to transport limestone is Excavator Komatsu PC 1800-Dumptruck HD 785, while overburden removal use a combination of Excavator Komatsu PC 300-Dumptruck Hino FM260JD. From the design of the quarry in April - August 2017 it was found that in April the overburden stripping was 6,535.71 Bcm and 552,001.89 Tons of limestone, with mining operational costs of $ 160,243. In May the stripping of limestone was reached 569,286.38 Ton, with mining operation cost of $ 162,243. In June, overburden stripping was 5000 Bcm was carried out and 582,636.13 tons of limestone, with mining operating costs reach $ 136,950. In June, overburden stripping was carried out of 29,753 Bcm and 596,955.59 tons of limestone, with mining operating costs of $ 168,989. In August, overburden stripping of 47,000 Bcm was carried out and 579,374.91 Tons of limestone, with mining operating costs of $ 196,683.Keywords:  Production, Mine Planning, Krigging Method, Design Quarry, Operating Cost
OPTIMASI ALAT GALI MUAT DAN ALAT ANGKUT TERHADAP PRODUKSI BATUBARA DENGAN METODE KAPASITAS PRODUKSI DAN METODE TEORI ANTRIAN PADA PIT TAMAN PERIODE OKTOBER 2016 UNIT PERTAMBANGAN TANJUNG ENIM PT. BUKIT ASAM (PERSERO) TBK. Alifa, Alifa; Gusman, Mulya; Prabowo, Heri
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Equipment is a very important factor in ensuring the sustainability of mining production. Theamount of excess fleet will result in inflated operating expenses, while the number of fleetsthat little will reduce the number of mine production. Ideal conditions in the process ofloading and transportation of materials is very difficult to achieve. However, it can beattempted through efficiency tehadap number of major mining dump truck. One simulationmethod that can be used to optimize the production of electric load - dump truck main methodis to use the production capacity and queuing theory. Simulations conducted in order toobtain optimum number of trucks with truck queuing time the minimum and avoid waiting forthe appliance load dump truck.Unloading tool used was Excavator Backhoe Komatsu PC 400 consist of 2 units. Dump truckwhich is a truck used Hino 500 FM 320 TI totaling 12 units. Based on simulation results withsimulation approach production capacity dump truck takes 11 units while the dump truckqueues based on the theory that it takes 11 units. In actual dump truck used is 12 units.Keywords : excavator, dump truck, match factor, production optimize, queuing theory
ANALYSIS OF JHA, JSA AND MANAGEMENT K3 AT KIP 16 BANGKA OCEAN MINING UNITS PT TIMAH (PERSERO) TBK PROVINCE BANGKA BELITUNG ISLANDS Joni, Riri Rahmahwati; HAR, Rusli; Prabowo, Heri
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
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This research discuss about safety and health occupational control inBangka Ocean KIP Timah 16 Units using some risk management methodes. Themethodes are Job Hazard Analysis (JHA), Job Safety Analysis (JSA), and HazardIdentification Risk Assesment Determining Control (HIRADC). Purpose of theresearch is to explain safety and health occupational in KIP Timah 16 Unit it isfor get the improvement of productivity work, production, welfare andcomfortability workers and achievment of zero accident.The type pf the research is descriptive. There are two data had collected.They are primary and secondery data. Primary data get from interview with theemployees and secondary data get from K3 documents in thecenter company ofPT. Timah UPLB and KIP 16.Based on result of research can get some conclutions. First, explain safetyand health occupational system. Second, the implementation formula of FR, SRand IR to count total accident that lost from day work, percentage of accident fora month. Third, to use methode JHA, JSA and HIRADC for identification andcontrol occupational accident. And last, to arrange new SOP from analysis resultJHA, JSA, HIRADC and earlier SOP.
PERENCANAAN KEGIATAN REKLAMASI PADA DISPOSAL AREA PT. ANDALAS NUSA INDAH (ANI) SUNGAI BERINGIN, KECAMATAN PELEPAT, KABUPATEN MUARO BUNGO, PROVINSI JAMBI Purnomo, Arief Dwi; Yunasril, Yunasril; Prabowo, Heri
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
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PT. Andalas Nusa Indah (PT ANI) is a coal mining company located in SungaiBringin Village, Pelepat District, Bungo Regency, Jambi Province with license status ofProduction Operation Mining License (20010-2019) based on SK Bungo IUP NO. 273 /DESDM in 2010, issued by Bungo Regent with a total area of 146 Ha.PT. ANI has a disposal with an area of ± 2.56 Ha, which has no longer functioning.The disposal of the area is in arid condition which when the dry season causes dust and inthe rainy season there are puddles so that the water puddle can overflow and drain the mineroad which productivity muddle. And also Most of the disposal land has not been usedoptimally because there is overburden pile part that is too high while the available land fordisposal is still wide. The company plans to reclaim the disposal of the area. Therefore, goodreclamation planning should be made.Reclamation planning starts from the arrangement of the land, where overburdenheap that is not equal to height will be flattened so that all the height parallel, After thatmaking terracing, topsoil top soil spread as planting medium. After the land settlement iscompleted then the land will be done cover crop planting. Furthermore, the revegetationprocess starts from pengajiran, excavation planting hole, planting, and maintenance (1 yearafter the seedlings are planted).Based on calculations in the planning of reclamation disposal area by way ofrevegation, the direct cost for the activities of land smoothing up to revegetation at thedisposal area is Rp. 132.294.402 and indirect costs of Rp. 47.301.493. Then the total cost ofrevegetation is Rp.179.595.895.
EVALUASI PENERAPAN KESELAMATAN DAN KESEHATAN KERJA TAMBANG BAWAH TANAH DALAM PENGGUNAAN ALAT PELINDUNG DIRI (APD) GUNA MENINGKATKAN MUTU KESELAMATAN KERJA PADA AREA PENAMBANGAN BATUBARA LOKASI CBP PT. CAHAYA BUMI PERDANA Prabowo, Heri; Yarsila, Alfa Candra
Bina Tambang Vol 4, No 1 (2019): JURNAL BINA TAMBANG
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PT. Cahaya Bumi Perdana is a company engaged in underground coal mines. Underground mining has a great potential danger This potential hazard that causes underground mining is more frequent accidents, such as methane gas explosions. In addition, since the commencement of the operation of this underground coal mine in 2016 there have been several accidents which have been caused by human error (human errors) such as incomplete use of personal protective equipment (PPE). Therefore, it is necessary to evaluate occupational health and safety in use of PPE. This work health and safety evaluation aims to improve the quality or quality of work safety and reduce the number of accidents that occur. This evaluation includes: work safety system, company policy, equipment for Operational Procedure (SOP).Based on the observations of the authors in the field, there are still workers who ignore PPE (Personal Protective Equipment), such as not using a helmet (safety helmet), shoes (safety shoes), mask (respirator), glasses, gloves, ear plug, not wearing clothes while working, and lack of awareness of the consequences of the accident for yourself, the company, and the environment. The results of this evaluation activity will provide a solution to improve the quality of work safety in underground mines, which is to motivate workers to always comply with all established regulations, always be careful in working and always prioritize occupational safety and health. Efforts that can be done by the company to improve the quality / quality of occupational health and safety (K3) such as, conduct K3 training, conduct control and analysis of job performance, and place the position of employees or workers in the right position. This will improve work performance and improve the quality of health and safety of workers. With the results of this evaluation is expected to reduce the number of accidents that occur.Keywords : personal protective equipment, standard operational procedure, k3
PERENCANAAN REKLAMASI LAHAN BEKAS PENAMBANGAN PIT D1 PT. AMAN TOEBILLAH PUTRA SITE LAHAT SUMATERA SELATAN Sari, Eka Retno; Ansosry, Ansosry; Prabowo, Heri
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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The steps of the mining activities in PT. Aman Putra Toebillah includes the activities of land clearing, stripping the ground cover, the exploitation of coal, transporting, processing and marketing of coal. After the mining is finished, the ex of mining area will leave an opening hole. Therefore any company of mine obligatory to implement reclamation of ex mining area to maintain environmental sustainability. Based on Ministerial Regulation Number 7 Year 2014, reclamation are activities during of mining to organize, restore, and improve the quality of the environment and the ecosystem to the function. Therefore, it takes a good planning, so the rate reclamation success can be realized.Mining avtivities include the arrangement of land reclamation. The Inpit Dump will be covered with land cover. Then on the top layer is covered with top soil as a medium growing plants. After the arrangement is finished then the Inpit Dump will be replanting (revegetation). To prevent the erosion, we made waterways, do care and give limes to settling pond to prevent the formation of acid mine water.Based on calculations of planning reclamation and revegetation, direct costs for reclamation activities and revegetation on the Pit D1 PT. Aman Toebillah Putra amount to Rp RP 14.104.226.892,00 and indirect costs amount to Rp 1.339.901.555,00. Then the total cost of reclamation and revegetation on the site amount to Rp 15.444.128.447,00.Keywords: Reclamation Plans, Costs, Pit D1
EVALUASI KEBUTUHAN DAN ESTIMASI BIAYA ALAT MUAT KOBELCO 380 DAN HITACHI 350 DENGAN ALAT ANGKUT SCANIA P360 DAN MERCEDEZ ACTROZ 4043 PADA PENGUPASAN OVERBURDEN PT. CARITAS ENERGI INDONESIA JOBSITE KBB, SAROLANGUN Sandeir, Eric; Prabowo, Heri
Bina Tambang Vol 3, No 3 (2018): JURNAL BINA TAMBANG
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Based on field observation on overburden removal at PT. Caritas Energi Indonesia, found that the production activity of overburden removal has not been optimal. This caused by the inconsistency between loading and transporting equipment, inefficiency of equipment and match factor which do not match, which is evident from the presence of equipment waiting in the field. The total production of actual loading equipment was 168.653,5 BCM/month, and hauling equipments was 103.530,2 BCM/month, this results in not achieving the planned overburden production target. After the analysis has obtained the cause of low production is due to the low efficiency of work and the lack of hauling equipment used. By increasing work efficiency and adding hauling equipment, total loading equipment is 185.630,4 BCM/month and hauling equipments are 177.781,7 BCM/month. The number of production increases but has not reached production targets due to high rainfall in March, the company spends a lot of time waiting for rain and slippery. This will have an impact on the increase of unavoidable standby time. From the calculation results obtained the amount of production costs of loading and hauling equipments for overburden removal before analyzed is Rp.1.095.056.103,11 /month or Rp.10.577,17/BCM, and after analyzed the amount of production cost become Rp.1.552.132.079,73/ month or Rp.8.730,55/BCM. And based on the calculation of BESR obtained SR economic value is 3,91.Keywords: Overburden, Work Efficiency, Match Factor, Production Cost, BESR.
ANALISIS PENGARUH PARAMETER GEOMEKANIKA BATUAN TERHADAP KEGIATAN PELEDAKAN PADA FRONT PENAMBANGAN BLOK A2 DI CV. TRIARGA NUSATAMA, KECAMATAN LAREH SAGO HALABAN, KABUPATEN LIMA PULUH KOTA, SUMATERA BARAT Rinaldo, Riki; Heriyadi, Bambang; Prabowo, Heri
Bina Tambang Vol 3, No 3 (2018): JURNAL BINA TAMBANG
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Determination of the geometry of the blasting and powder factor should pay attention to characteristics of rock mass and local geological conditions. Alternative geometry experiments done to apply the problem of the resulting explosion. The alternative draft geometry is determined by using the characteristics of rock mass Blastability based on Lilly's Index, in the form of rockmass description, joint plane spacing, joint plane orientation, specific gravity influence, and hardness. Based on the results of weighting the mass of rock Blastability Index values obtained are blown up as big as 54.125. From these values, the geometry of the explosion which is good for a 3 inch bore hole is a burden 3 m, spacing 2 m, a depth of 5.5 m, subdrilling 0.5 m, high level of 3.5 m, steaming of 2 m, and explosive hole long 2 m. And also the value of the powder factor 0.24 kg/m³. From the geometry of the proposal generated the desired percentage of the company's boulder and the use of explosives is lower compared to the previous applied geometry. Keywords: Charateristic of rock mass, Blastability index, Geometry, Blasting, Fragmentation