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All Journal Journals Mining Engineering : Bina Tambang Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri Industrial and Domestic Waste Management JRTI (Jurnal Riset Tindakan Indonesia)

Rizto Salia Zakri

Universitas Negeri Padang

Author-ID : 2720221

Religion Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Social Sciences Other

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ANALISIS INVESTASI PENGADAAN ALAT BERAT DI PT. KARBINDO ABESYAPRADHI DENGAN METODE NPV DAN IRR Rizto Salia Zakri; Murad Murad; Sumarya Sumarya
Journals Mining Engineering : Bina Tambang Vol 1, No 2 (2014): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract This research start from the condition in the field in PT. Karbindo Abesyapradhi, where the heavy equipment damage to often, it make production target never reach. To reach the target, is important to buy some new heavy equipment, but it can make some problem about the cost of investment. There are 3 option to buy some new heavy equipment, one of the option will be a best option and can make the company get profit. For this problem the writer make this research, to know the best alternative to the company.In this research the writer use quantitative research method and also use descriptive method. From this reseach we will know comparation from each option. Sample will represent all of heavy equipment of PT. Karbindo Abesyapradhi have.Based on this research, we know that buy a new heavy equipment cash is the best option for the company, where the company will get benefit from this option. This result become from trial with Net Present Value method, where the cash option get the higgest NPV value, while when we test with Internal Rate of Return after pass the incremental analitysis produce the result that the cash option be a best option and have the most benefit for the company and it can apply for all kind of heavy equipment in PT. Karbindo Abesyapradhi. Kata kunci : Investment, Heavy Equipment, NPV, IRR, Incremental Analysis

Analisis Pengaruh Pemasangan Kisi Beton (Concrete Crib) Sebagai Perkuatan Lereng Terhadap Kestabilan Lereng Dengan Menggunakan Metode Kesetimbangan Batas Di PT. Dairi Prima Mineral Kabupaten Dairi Provinsi Sumatera Utara Wiwik Windasari B Manalu; Rizto Salia Zakri
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i5.115168

PT. Dairi Prima Mineral is a company engaged in the field of mineral mining, this is in the form of zinc ore and black lead minerals whose mining locations are located in Sopokomil Village, Dairi Regency, North Sumatra. the mining system is carried out with an underground mining system. construction activities or preparation for mining activities, the most important thing to do during construction activities is to pay attention to the condition of the mining area, especially slope stability, PT. Dairi Prima Mineral carries out protection activities on the slopes, this is related to the long-term safety of the slope treatment, and plans to build processing plant facilities and other infrastructure under the foot of the slope or the toe which is 10 meters from the slope.The method used is the boundary equilibrium method (simplified Bishop). As a result of the research, it can be concluded several things, namely the slopes in area 8 in actual conditions using actual slope geometry data in the field as well as laboratory testing to obtain physical and mechanical properties of soil and rock and after that a modeling of the slopes is carried out to see the slope safety factor and simulation on the slopes. when the slope is given a concrete crib, for the actual condition the safety factor for single slopes is 1,271 natural conditions and saturated conditions 1,231, from the actual conditions the slopes are not stable so it is recommended to use a double bench with natural slope FK 1,429 and saturated 1,393, from the recommendation FK has not complied with SNI 8470-2017 FK≥ 1.5. Furthermore, the double bench slope was given anchor bolt reinforcement for stable slope conditions with FK 1,535 saturated conditions and natural conditions 1,601 with the number of anchors used 24 anchors and the distance between anchors 3 meters with a length of 9 meters, from safe slope modeling or slopes in a stable condition with FK 1.5 for permanent slopes and long term slopes.After it is known that slope reinforcement with retrofit planning using the previous reinforcement specifications in area 8 is very maximal and economical, it can be seen from slope analysis using the simplified Bishop boundary equilibrium method by getting FK≥ 1.5 Keywords: Analysis, Slope Reinforcement, Concrete Crib, Bishop's Method, Slope Geometry.

PKM Pelatihan Mitigasi Bencana Alam bagi Siswa SMAN 3 Solok Riko Maiyudi; Yoszi Mingsi Anaperta; Facrul Rozi Ramadhan; Tri Gamela Saldy; Harizona Aulia Rahman; Rizto Salia Zakri
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Natural disasters in recent years are very common and need preparedness, awareness and vigilance in the face of disaster, especially in the city of Solok, starting from earthquakes, landslides and other. To reduce the risk of disaster management is required in accordance with law number 24 year 2007 about disaster management.The absence of disaster mitigation training provided for students in particular SMA N 3 Solok and less optimal students ' role/young generation in disaster mitigation because students have not had the knowledge to mitigate make the dedication to conduct training mitigation and preparedness of disaster to them so that the participants understand about how mitigation and preparedness. This training is provided in the form of lectures, discussions, and field practices.After training was obtained the increase of knowledge about the mitigation of natural disasters by the students SMAN 3 Solok. At pre-training (before training) only 65.8% of students who understand the mitigation of natural disasters and at the time of post-training increased to 96.2% of students understand the mitigation of natural disasters..Keywords: Natural disasters, disaster management, mitigation and preparedness

Analisis Sensitivitas Deterministik Investasi Pengadaan Alat Berat di Perusahaan Pertambangan Batubara dengan Metode NPV Rizto Salia Zakri; Tri Gamela Saldy
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. One of the biggest financing components in mining companies, especially coal mining, is production costs, while have contribution of> 20% in total mining costs. On the other hand the production process is the main process in mining, becaus this activity will produce commodities. Heavy equipment is a major component in the production process, the selection of heavy equipment is a determining factor in the calculation of production costs. Methods of procurement of heavy equipment are important in the calculation of production costs, in general there are 3 commonly used heavy equipment procurement methods, namely the direct purchase method (cash), the credit method (leasing), and the rental method. Each method requires a different investment value from each other. In the principle of investment, which is considered as a profitable investment is an investment that provides the greatest returns, it can be in the form of the net present value (NPV) and the largest interest rate ratio (IRR) which is greater than the bank interest rate. Changing commodity values, and rising and falling fuel prices, will affect the investment value of the heavy equipment procurement process, sensitivity analysis is important to know in which conditions the investment is still profitable. Based on the deterministic sensitivity analysis, it can be seen that commodity prices are the most influential parameter on investment returns, while fuel prices do not significantly affect investment returns. The procurement method used is also not affected by changes in investment parameters, the method of procurement of cash is the best option, with a large initial investment value.Keywords: Deterministic Sensivity Analysis, Net Preset Value (NPV), Heavy Equipment, Investment, Coal Mining, Spider Web

PKM Sosialisasi Mitigasi dan Kesiapsiagaan Bencana Alam di SMA N 2 Kota Solok Tri Gamela Saldy; Riko Maiyudi; Yoszi Mingsi Anaperta; Harizona Aulia Rahman; Rizto Salia Zakri
Journals Mining Engineering : Bina Tambang Vol 5, No 3 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Natural disasters are disasters caused by the event or series of events due to nature. Natural disasters in recent years are very common and need preparedness, awareness and vigilance in the face of disaster, especially in the city of Solok, starting from earthquakes, landslides and so forth.Yet there is no socialization of natural disasters and disaster preparedness in SMA N 2 kota Solok so that students do not have the knowledge to mitigation and preparedness of natural disasters make the executor to conduct socialization mitigation and natural disaster preparedness to them.So that the participants in this case students understand about how to mitigate and preparedness natural disasters. The socialization is given in the form of lectures, discussions, and field practices.After the socialization was obtained increased knowledge about the mitigation of natural disasters by the students SMAN 2 Kota Solok. At pre-training (prior to training) only 71% of students who understand about mitigation and preparedness and at post-training increased to 100% of students understand the mitigation of natural disasters.Keywords: Disaster management Natural disasters, , mitigation and preparedness

Evaluasi Dan Rancangan Sistem Ventilasi Pada Tambang Batubara Bawah Tanah Lubang BMK 35 Lori 4 PT. Bara Mitra Kencana. Kota Sawahlunto, Provinsi Sumatera Barat. kurnia arrafi siregar; Rizto Salia Zakri
Journals Mining Engineering : Bina Tambang Vol 6, No 4 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i4.114366

CV. Bara Mitra Kencana is a coal mining company located in Talawi District, Sawahlunto City, West Sumatra Province. The company has experienced an incident fatality since January 2020 which occurred in the tunnel BMK35 lori 4. In order to prevent fatality in other tunnels, therefore it has research mine ventilation system in the tunnel BMK35 lori 4. This study was conducted to obtain a likely factor causes of fatalityBased on KEPMEN ESDM Number 1827K / 2018 pages 104,107, and 177 regarding mine ventilation, the measurement results obtained are close to or not following details such as the air temperature at BMK35 Lori 4 from 29˚C to 31˚C, and humidity is between 95% to 100%. BMK35 Lori 4 has a concentration of oxygen (O2) 19.8%, Sulfide (H2S) 0%, Carbon Monoxide (CO) 0.036% and Methane (CH4) has been 0.35%. refer to the minimum air quantity requirement of 2,546 m3/s that have been fulfilled, so that the air needed in the field by 2.4 m3/s.In order to overcome this problem, The researchers designed an underground mine ventilation system using the Ventsim software. The ventilation design was planned to use 3blowers with 16-inch diameter.. The blowers had used supplies air to C6 and workface through a duct in a total of 2 pieces and blower for exhaust air out of the mine mouth through ducts as much as 1 piece. The results of the simulation using the Ventsim application showed the air quantity increased from 2.4 m3/s to 2.7 m3/s.

Hubungan Kuat Tekan Uniaksial dan Kuat Tarik Tidak Langsung Pada Batuan Sedimen Dengan Nilai Kuat Tekan Rendah Rizto Salia Zakri; Ilep Prengki; Tri Gamela Saldy
Journals Mining Engineering : Bina Tambang Vol 5, No 3 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Soil and rock material has less strength to tension, compared to pressure and shear. Tensile strength has an important role in the stability of mining activities such as drilling, blasting and making slopes and mine tunnels. Determination of the tensile strength value is currently done by testing the indirect tensile strength (Brazillian Test). In the field commonly, to prediction tension strength value used rule of thumb which is the result of analysis from previous tests, but for this case, the prediction results using rule of thumb are inaccurate. The sample used in this research is sedimentary rock taken from several coal mining locations in the Jambi province. This sample is then tested using a compressive machine to get the uniaxial compressive strength and tensile strength values. Descriptive statistical methods and linear regression methods are used in this study to obtain an accurate prediction of tensile strength based on compressive strength data. According to the descriptive statistical method the tensile strength value is 0.41 times the compressive strength value, while if it is linear regression, the result of the tensile strength value is equal to 0.2079 σc + 0.1917. Both of these methods are able to predict the value of the tensile strength better than the existing rule of thumb, but more advanced research with more samples is needed to get the better equation.Keywords: Sedimentary Rock, Brazilian Test, Tensile Strength, Compressive Strength, Prediction

Analysis Stability of the Tunnel # 11 Jakarta – Bandung High Speed Train Using Finite Element Method Aprig Ustianto; Rizto Salia Zakri
Journals Mining Engineering : Bina Tambang Vol 6, No 5 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i5.115157

Tunnel 11 has total length of 1,1 km. the shape of tunnel 11 was horseshoe with 15 meters wide and 13 meter high. Form classification rock mass rating (RMR) analysis, excavation recommendation on tunnel 11 by using full face method. Whereas actual excavation in the field with top heading and banching method. Based on the alignment required a plan of tunnel stability by using finite element. Analysis of tunnel’s stability using a full face excavation method based on RMR value. Tunnel stability with method of digging the top heading and bench and the optimized buffer based on the simulation carried out. The tunnel’s stability analysis is reviewed by the strenght factor and displacement value in the tunnel. Based on analysis with full face excavation method, on the left wall with no suport it’s got the lowest strenght factor value that is 6,3 and biggest displacement value that is 1,69 cm. with excavation on lower left side of the wall without support there was the smallest value of factor that is 5,2 and the biggest displacement value is 1,7 cm. strenght factor value by using full face excavation with top heading and benching threshold value strenght factor according to the KEPMEN 1827K/MEM/2018 and threshold deformation value according to japan society engineers ( JSCE ) based on a modeling simulation of the tunnel’s stability from economic side and stability analysis, then the optimal insulation on tunnel 11 is shotcrete K-175 #10 mm with top heading and benching excavation.

REKONSILIASI RENCANA SEQUENCE PENAMBANGAN DENGAN REALISASI DI PIT X PADA BULAN MEI 2021 DI PT. BUKIT ASAM,TBK. TANJUNG ENIM, SUMATERA SELATAN Didan Ramaddandy; Rizto Salia Zakri
Journals Mining Engineering : Bina Tambang Vol 6, No 3 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i3.115979

During mining sequences at Pit X, PT. Bukit Asam,Tbk incompatibilities over-stripping, overcut, and undercut frequently happen as a result of the reconciliation between mine plan design with realization in the field. These incompatibilities can be happened repeatedly every month due to undercut material, proven by the reconciliation data on March and April 2021. So there needs a reconciliation on May 2021 to figure out incompatibility between mine plan design with the realization, obtain the causing factors and solutions to minimize incompatibilities occurred. The analysis to find out the incompatibilities on May 2021 was carried out by overlay the mine progress map with mineplan design, creating cross-sections, calculating the volume from the latest mining activity of the month, analyzing causing factors with the actual data to obtain the solutions of the problems. Analysis results proved that on May 2021 over-stripping, overcut, and undercut incompatibility sequentially occurred for overburden of 226.950,79 BCM, 147.927,12 BCM, and 491.891,14 BCM, while for coal it is 59.249,65 Tons, 77.733,18 Tons, and 134.776,15 Tons. From the analysis, the causes of the incompatibilities are the number and placement of fleets that don’t base on the plan, low productivity of digging and loading equipment, incompatibility of mechanical equipment used, and supervision factors. Those incompatibilities affect the increase of the stripping ratio for the next month’s plan. Several actions can be done such as replacing digging and loading equipment on both fleets with higher specifications, adding mining boundaries, and improving supervisions in the field to minimize the incompatibilities.

ANALISIS PENGARUH PENGGUNAAN FLY ASH DAN KAPUR TOHOR PADA PENETRALAN PH AIR ASAM TAMBANG DI PT. MANDIANGIN BARA PRIMA Riam Marlina Amsya; Rizto Salia Zakri; Muhammad Rofiq Fiqri
Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri Vol 21, No 1 (2021): JURNAL SAINS DAN TEKNOLOGI
Publisher : Sekolah Tinggi Teknologi Industri Padang

PT. Mandiangin Bara Prima merupakan perusahaan bergerak dibidang pertambangan batubara yang berdiri pada tahun 2005 dan merupakan salah satu perusahaan yang terletak di Kecamatan Pauh, Kabupaten Sarolangun, Provinsi Jambi. Air asam tambang merupakan permasalahan yang terjadi di pertambangan batubara, tidak terkecuali di PT. Mandiangin Bara Prima. Penanganan yang tepat menjadi sangat penting mengingat dampak dari AAT sangat berbahaya terhadap masyarakat, penanganan yang kurang tepat dari perusahaan juga dapat menimbulkan kenaikan biaya yang signifikan terhadap perusahaan. Tujuan dari penelitian ini adalah menganalisis efektifitas peggunaan kapur tohor dan fly ash untuk menetralkan pH air asam tambang serta menganalisis jumlah kebutuhan kapur tohor serta fly ash dan biaya yang yang dibutuhkan. Penelitian dilakukan di laboratotium Balai Riset dan Standardisasi Industri Padang, sampel air diambil pada inlet 1 dan inlet 2 kolam pengendapan PT. Mandiangin Bara Prima, selanjutnya dibawa dan diteliti di laboratorium. Fly ash dan kapur tohor ditambahkan pada masing-masing sampel air dengan komposisi yang berbeda sehingg didapatkan komposisi efektif dari penggunaan media tersebut. Dari hasil penelitan didapatkan Perubahan setelah ditambahkan kapur tohor pada inlet 1 mengalami kenaikan nilai pH, perubahan sebesar 97% Sedangkan pada inlet 2 kenaikan sebesar 75%. Dan setelah ditambah fly ash pada inlet 1 mengalami kenaikan sebesar 64%. Sedangkan pada inlet 2 mengalami kenaikan pH sebesar 56%. Kebutuhan bahan penetral AAT untuk kapur tohor per bulan sebesar 410,28 Kg/bulan dengan biaya yang harus dikeluarkan sebesar Rp. 2.052.400,-/bulan dan fly ash sebanyak 2.630,7936 Kg/bulan.

Co-Authors Ade Muthia Febriyanti Aprig Ustianto Atha Angely Diansa Didan Ramaddandy Facrul Rozi Ramadhan Fadhilah Fredy Mukti Harizona Aulia Rahman Ilep Prengki Indah Suryani Jukepsa Andas kurnia arrafi siregar Muhammad Rofiq Fiqri Muhammad Shidiq Murad Murad Novrianto Novrianto Raihan Mhd Indrawan Riam Marlina Riam Marlina Riam Marlina A Riko Maiyudi Saldy, Tri Gamela Sumarya Sumarya Wiwik Windasari B Manalu Yoszi Mingsi Anaperta

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