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All Journal Journals Mining Engineering : Bina Tambang Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri

Bambang Heriyadi

Universitas Negeri Padang

Author-ID : 2720236

Computer Science & IT Earth & Planetary Sciences Engineering Industrial & Manufacturing Engineering

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Analisis Kestabilan Lereng Front IV Pit Limit Di Area Penambangan Batu Kapur PT. Semen Padang Sumatera Barat Fuzi Atiiqah; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 5, No 3 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT. Semen Padang is the oldest cement factory in Indonesia which was established on March 18, 1910 under the name NV Nederlandsch Indische Portland Cement Maatschappij (NV NIPCM), which is the first cement factory in Indonesia. The activity of mining in Pit Limit Front IV development area in September 2019 occurred landslides. The landslide that occur is Toppling Failure. The actual slope is 750, the height is 20 meters, and the width is 8 meters. Based on bishop method the analysis results obtained the value of the slope safety factor (FK) in dry conditions is 1.4 with an angle of 70°, a height of 30.752 meters and a value of the Probability of Failure (PF) is 0%. the results of the analysis obtained value of the slope safety factor (FK) in saturated conditions is 1.0 with an angle of 70°, a height of 30.752 meters and a probability of failure value of 45.7%. The results of the slope design recommendations obtained the value of the slope safety factor (FK) in dry conditions is 1.9 with an angle of 66°, height of 30,752 meters and value of the probability of failure (PF) is 0%. The value of slope Safety factor (FK) in saturated condition is 1.4 with an angle 66°, height of 30.752 meters and value of the probability of failure (PF) is 0%.Keywords: Slope, Safety of Factor, Probability of Failure, Bishop Method, Topling Failure

Analisis Metode Penggalian Batuan Berdasarkan Kriteria Indeks Kekuatan Batu (Franklin) di Site Penambangan Batu DolomitePT. Bakapindo, Jorong Durian, Nagari Kamang Mudiak, Kecamatan Kamang Magek, Kabupaten Agam, Provinsi Sumatera Barat Wahyu Kurniawan; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT.Bakapindo is engaged in dolomite mining. The mining method applied is the Open Pit quarry method. Currently the mining process is carried out by PT. Bakapindo applies the blasting method to release dolomite rock from its parent rock. In determining the right method for dismantling material, it is necessary to study rock capability. In this study, the method applied to determine the suitable excavation method is by Franklin's rock strength index criteria chart. The data used in the study are discontinuity field conditions taken with the scanline system and rock samples used to test rock strength by means of Point Load Index. Total data on discontinuity field conditions measured in rock mass is 201 data. The results of the point load index test obtained the Franklin (Is) average index value of 4.740MPa. Based on the results of the analysis of rock mass conditions at PT. Bakapindo found that rock mass rating (RMR) of 67 was classified as class II (Good rock), the fracture index value was 0.091m. Based on Franklin's rock strength index criteria graph, it can be concluded that suitable excavation methods are carried out at PT. Bakapindo is byblasting cracks.Keywords: mining method, Index Franklin, rock mass rating (RMR) , Discontinuiy, Point Load Index

Analisis Lubang Bukaan Decline Channel (CH) 677 Blok Cikoneng PT. Cibaliung Sumberdaya, Banten Annisa Hanim D; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Study was conducted in the underground mine of PT Cibaliung Sumberdaya, Cimanggu, Pandeglang, Banten Province. Openings of declines and mining fronts, has caused the stability of the mining area to be disrupted. Rock deformation at the site is decline still observed using a convergence meter. In detail the observation area was carried out at decline Cikoneng CH 677, the rock mass quality (RMR) is 31 and width of decline is 4,2 m. From the results of the observation, the CH 677 have a lump on the left wall and cracks on shotcrete. The cumulative convergence monitoring results show a displacement is 32,285 mm with the largest displacement speed of 1,718 mm/day. The 2 D modeling results based on convergence theory, the area are categorized as unstable. For this reason, the stability of the aperture hole was performed using software Phase 2 with Hoek-Brown collapse criteria. The simulation produced a support system using 5 pieces of rock bolt (2,4 m) set of on the left wall with a space of 0,8 m, 5 pieces on the right wall with a spacing of 0,8 m and using shotcrete on the left wall with a thickness of 100 mm.Keywords: Decline, convergence meter, tunnel stability, deformation, rock bolt

Analisis Balik Kestabilan Lereng Penampang A Dan Penampang B Area Lowwall Tambang Batubara Pada Pit X PT. Kideco Jaya Agung Kecamatan Batu Sopang Kabupaten Paser Provinsi Kalimantan Timur Suryadi Putra; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT. Kideco Jaya Agung is a coal mine company in Paser Regency, East Kalimantan Province, with an Open Pit Mining method. Spreading cover rock is done by blasting. Blasting activities affect the slope of stability. In May 2018 there was a landslide in the A section lowwall area while cross section B in July 2018 occurred overcut to the design in 2018. In order to be able to provide the results of the analysis, several processes carried out were the calculation of blasting vibrations using the Matsuo reference formula. Then the back analysis using the probabilistic method of Monte Carlo. As well as analysis of safety factors and recommendations for slope geometry using janbu simplified method. The results of the analysis are (1) The relationship of the distance of blasting to Amaks produced is Amaks = -6 x 10-5 (distance) + 0.0416. (2) The geotechnical parameter of the back analysis is mudstone: c = 77,5 kN /m2 and Ф = 17,36; coal: c = 72,54 kN /m2 and Ф = 17,112. (3) Design of FK values in 2018 cross section A lowwall is 1,169 and crosswall B design 2018 FK design value is 1,365. (4) Recommendation of lowwall cross section A geometry with overall slope of 14o and make the width of the bench at an elevation of 65 mdpl above 30 meters.Keywords : Blasting, Back analysis, Monte carlo, Janbu simplified, Recommendations geometry of lowwall.

Analisa Kestabilan Lereng Studi Kasus Kelongsoran Ruas Jalan Mandeh-Sungai Nyalo Kecamatan Koto Xl Tarusan, Kabupaten Pesisir Selatan Sahmijar Sahmijar; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 4, No 2 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. To design safe slope, using Bishop Method and it helped Geostudio application. physical properties parameter (weight of content, specific gravity, the water level) and mechanics (cohesion and shear angle). The analysis of safe slope was based on the value of safety factor, based on Bowles the value of safety factor >1,25. There were 2 layers in the slope, in the first layer the value of shear angle 21,80 showed clay soil and in the second layer the value of shear angle 31,660 showed sandy clay soil. The result of safety factor using Geostudio application in the condition of natural soil was gotten the value of safety factor 1,388 showed that safe slope and in the saturated condition was gotten safety factor 1,046 it meaned the slope was in critical condition. Recommendation of safe slope design used decreasing sideways slope method, it consist of 4 bench. In the top bench the height was 5m and the sideways a was 45° and it was gotten safety factor =1,692 , in the second bench the height was 4m and the sidewayas was 45° and it was gotten safety factor = 1,333, in the third bench the height was 5 m and the sideways was 45° and it was gotten safety factor =1,294 , and in the last bench the height was 5m and the sideways was 45°, the result of overall was gotten safety factor = 1,288, based on Bowles (2000) the safety factor was safeKeywords: Bishop method, geostudio, water level, cohesion, safety factor

ANALISIS SISTEM VENTILASI TAMBANG UNTUK KEBUTUHAN OPERASIONAL PENAMBANGAN PADA TAMBANG BAWAH TANAH OMBILIN 1 (SAWAHLUWUNG) PT. BUKIT ASAM – UPO Ari Febrianda Bafnis; Bambang Heriyadi; Sumarya Sumarya
Journals Mining Engineering : Bina Tambang Vol 1, No 2 (2014): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

PT. Bukit Asam - UPO is a coal underground mining company that conducted mining in the areas Ombilin I (Sawahluwung), Ombilin II (Waringin-Sugar) and Ombilin III (Sigalut).On the mining production in the underground mining, PT. Bukit Asam-UPO used exhaust ventilation system with the quantity of air out is 35.56 m3/s, whereas the intake air quantity is 35.07 m3/s through the three inlets, they are Adit Sawahluwung is 25.28 m3/s, Lurah Sapan I is 7.14 m3/s and Lurah Sapan II is 2.65 m3/s. The amount of air entering and the air out there is a difference of 0.49 m3/s which may be caused by air leaks at Mine Vein.The air quantity available on the front J6C is 4.02 m3/s, front J9C is 3.17 m3/s, front J11C is 2.94 m3/s and front Dosco is 3.15 m3/s. While the minimum air quantity to be supplied is for front J6C is 2.17 m3/s, front J9C is 2.50 m3/s, front J11C is 2.50 m3/s and front Dosco is 2.17 m3/s.In terms of air quality in underground mines Sawahluwung already on the threshold value has been determined, for CH4 <1%, CO2 <0.5%, CO <0.0005%, O2> 19%, the effective temperature (Te) at 21 0 C – 32 0 C and the relative humidity (RH) 65% - 95%. Keywords: Ventilation Air Requirements, Quantity and quality of the mine air

PERHITUNGAN PENGARUH KEMIRINGAN DAN DEBIT AIR PADA PEMAKAIAN SHAKING TABLE DALAM PENGOLAHAN BIJIH TIMAH LOW GRADE DI POS PAM PENGAREM PT TIMAH (PERSERO) TBK Nopi Kohirozi; Bambang Heriyadi; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 1, No 1 (2014): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

ABSTRACT PT TIMAH (Persero) Tbk is a National Bussines Agency (BUMN) which move on mining field. The core business of this company is tin mining. The result of land mining held by business partner that fulfill the standard of PT TIMAH (Persero) Tbk is Sn with content > 20%. Due to rareness of the stockpile and since the processing tin content is become lower and lower, therefore a technology to process the low grade tin ore with fine grain into an acceptable content of PT TIMAH (Persero) Tbk is needed.One of the tools being used this time is shaking table.Today, in the operation, the use of shaking table by business partner of PT TIMAH (Persero) Tbk. Thus, the problem is whether the variables arrangement of shaking table operation for this time do not fit the feed condition, so that it can influence the time and the cost of the process. Therefore, there should be an analysis of the shaking table operation variables, so that a good suitability can be obtained in order to increase the cassiterite gain.According to the research result, it can be concluded that the main factors which cause the low gain of tin ore is over sloping tilt (3˚ and 3˚), and over sloping (5˚ and 5˚) and a too high water discharge (7 litres/minutes and 8 litres/minutes). The best result can be obtained through experiment with a moderate tilt (3˚ and 5˚), small water discharge which produce average content 20,30 % Sn, concentrate result weight 49,01 Kg and concentrate content weight 9,94 Kg Sn.Keyword : low grade, slope, water discharge, shaking table ABSTRAK PT TIMAH (Persero) Tbk adalah Perusahaan Badan Usaha Milik Negara (BUMN) yang bergerak di bidang penambangan. Bisnis inti perusahaan ini adalah penambangan timah Hasil dari Penambangan di darat yang dilakukan oleh Mitra Usaha yang dapat diterima oleh PT TIMAH (Persero) Tbk adalah dengan kadar Sn > 20%. Dengan semakin sulitnya cadangan yang tersedia dan semakin rendah kadar timah yang diolah maka diperlukan suatu teknologi yang dapat mengolah bijih timah low grade dengan butiran yang halus menjadi bijih timah dengan kadar yang dapat diterima oleh PT TIMAH (Persero) Tbk. Salah satu alat yang digunakan saat ini adalah shaking table. Saat ini pemakaian shaking table oleh mitra usaha PT TIMAH (Persero) Tbk belum mempunyai standar baku dalam pengoperasiannya. Dalam pengoperasiannya masih menggunakan trial dan error. Berdasarkan kondisi di atas, permasalahan yang timbul adalah apakah pengaturan variabel-variabel operasi shaking table selama ini belum sesuai dengan kondisi umpan (feed) sehingga berpengaruh terhadap waktu dan biaya proses. Oleh karena itu, perlu dilakukan kajian terhadap kondisi variabel-variabel operasi shaking table yang digunakan sehingga dapat diperoleh kesesuaian yang baik dalam meningkatkan perolehan cassiteriteBerdasarkan hasil penelitian maka didapatkan bahwa faktor-faktor utama yang menyebabkan rendahnya perolehan bijih timah adalah kemiringan yang terlalu landai (3˚ dan 3˚),dan terlalu miring (5˚ dan 5˚) dan debit air yang terlalu cepat ( 7 liter/menit dan 8 liter/menit ). Perolehan terbaik didapatkan pecobaan dengan kemiringan yang sedang (3˚ dan 5˚) debit air yang kecil 6 liter/menit. Perolehan percobaan terbaik pada 3˚ dan 5˚ debit air yang kecil 6 liter/menit, menghasilkan Kadar rata – rata 20,30 % Sn, Berat hasil 49,01 Kg dan berat kadar 9,94 KgSn.Kata Kunci: low grade, Kemiringan, debit air, shaking table

Analisis Balik Kestabilan Lereng Bekas Disposal Area Dengan Menggunakan Metode Bishop di Tambang PT. Nusa Alam Lestari di Desa Salak, Kecamatan Talawi, Kota Sawahlunto, Provinsi Sumatera Barat. Syakinah Hasibuan; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 5, No 4 (2020): 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.v5i4.109368

Abstract. PT. Nusa Alam Lestari is a coal mine located in Salak village, Talawi sub-district, Sawahlunto city, West Sumatra Province. In 2006-2011, the mining system used was open pit mining, but at the end of 2011 mining continued with the underground mining system. Former mine open disposal used to be on the upper side of tunnel C2 which affected production from underground mines, is former disposal area slope condition (section A – A’) unstable so that landslides occurred in December 2019 of soil and rock has weakened material are identified in tht form of an avalanche arc. Slope geometry after landslide were slope height (H) = 35,7 meter, dip (α) = 70o, and bench width (L) = 13 meter.The method used in this research are the bishop method and hoek and bray method. The results from this research can conclued another thing follows. Data from laboratory tests were unit weight (γdry) = 18,06 kN/m3, unit weight (γsat) = 19,99 kN/m3, Cohession (C) = 18 kN/m2, and phi (φ) = 34o. And result from back analysis in landslide were (C) = 16 kN/m2, (φ) = 30o, (γ) = 14 kN/m3. Safety factor value before landslide used material properties from test laboratory in dry condition FK = 0,702 and in saturated condition FK = 0,676, whereas base on back analysis in dry condition FK = 0,667 and in the wet condition FK = 0,607. Slope geometri reccomendation by simplified bishop and safety factor value got are overall slope in the dry condition, H = 35,7 meter, L =13 meter, α = 55o with FK = 1,382, and in the saturated condition FK = 1,331. On single slope in the dry condition (H) = 17 meter, L = 13 meter, α = 45o so FK = 1,432, whereas in the saturated condition (H) = 13,5 meter and α = 40oso FK = 1,380. Reccomendation slope geometry (single slope) used hoek and bray method are in the dry condition (H) = 17 meter, L = 13 meter, α = 45o nilai FK = 1,46 and in the saturated condition (H) = 13,5 meter, L = 13 meter, α = 40o so FK = 1,33.Keywords: Disposal Area, Slope Stability, Bishop Method, Safety Factors, Back Analysis

Evaluasi & Analisis Rencana Perubahan Jalur Ventilasi Untuk Kebutuhan Lubang Pendididikan Tambang Bawah Tanah Ombilin 1 (Sawahluwung) PT. Bukit Asam Tbk - UPO Akman Syarif; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 4, No 1 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. PT Bukit Asam Tbk Ombilin Mining Unit (UPO-PTBA) is the oldest underground coal mine in Indonesia, due to the activity of the penambangannya has been performed since the colonial Netherlands.Ventilation system in underground mine Sawahluwung using suction system (exhaust) air out the quantity of 35.10 m3/s, while the quantity of incoming air of 34.50 m3/s through the three holes of entry i.e. Adit Sawahluwung + 214 of 23.00 m3/s, Adit Sawahluwung + 223 of 6.50 m3/s and head of Sapan II of 5.00 m3/s. The amount of air entering the air out there is a difference of 0.60 m3/s caused by air leaks in the duct wall Mine Fan.Hand in hand towards post-war mines, PTBA UPO plans make preparing hole and education as a means of education for the world of education and society, then closing and pengedaman done on the area J6-J8, J7-J9, J1-Bak Pumps LS II. The pattern of air flow enters starts from the Adit Sa.Keywords: The Need Of Air, Ventilation System, Tunnel Education,Kepmen.

Analisis Sistem Ventilasi untuk Meminimalisir Terjadinya Swabakar pada Tambang Batubara Bawah Tanah THC 04 CV. Tahiti Coal, Sangkar Puyuh, Talawi, Sawahlunto Multavich Multavich; Bambang Heriyadi
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.v6i4.113994

May 21, 2020 CV. Tahiti Coal has experienced a self-burning or also known as spontaneous combustion of coal (sponcom). The incident occurred at branch 401 B of the tunnel THC 01. Preventing the occurrence of sponcom in other mine tunnel, the research of ventilation system was carried out on the tunnel THC 04. This location was chosen because it has the potential to experience a sponcom. Research was conducted to obtain the causative factors that allow the occurrence of sponcom and continued with the design of ventilation systems to reduce the likelihood of sponcom. The results of this study show that the main factor that can conduce sponcom in the tunnel THC 04 is the lack of air quantity. The minimum quantity of air that can control heat and humidity is 8.7 m3/s, while the quantity of air in tunnel THC 04 is 3.03 m3/s. Based on measurements taken, the air temperature at THC 04 ranges from 29°C to 31°C, and humidity is between 90% to 100%. Therefore, the researchers designed the ventilation system by creating a translucent hole that leads to the surface and placing an exhaust fan at the end of the hole. This design can make the air quantity at THC 04 increase to 15.5 m3/s.

Co-Authors Abdullah, MT, Dr. Rijal Adree Octova Ahmad Ridho Permana Akman Syarif Al Anhar Hardianto Aldo Surya Pratama Alfi Rahman Andi Asmunandar Andre Gustian Anita Sari Sundriya Annisa Hanim D Annisa Oktavianingsih Ansosry Ansosry Aprilian Susanto Argi Saputra Ari Ardila Ari Febrianda Bafnis Ariq Jibran Azhary Rahim Bagas Maulana Hasan Berryl Hannah Carles Trisis Caniago Dasri Husien Dewi Suryani Dhoni Syaputra Diky Canima Fadhlur Rohman febri yanda praja Febrian Syukra Febylina Valencia Agustina Rumwaropen Fedi Fedi Fuzi Atiiqah Gary Aprio Gestio Sesar Yulindo Heri Prabowo Ilep Prengki Insani Sabilillah Jeremyes A.P Jualifa Pradisti Gayatri Jukepsa Andas Jukepsa Andas M Adli Fikri Muhammad Abbil Raihan Muhammad Deno Akbar Muhammad Fadillah Muhammad Irawan Multavich Multavich Mulya Gusman Murad Murad Naufal Deya Al Mafaza Mufti Nopi Kohirozi Noval Satria Novita Tria Putri Oktaviana Saputri Panji Kurnia Wiradani Rahmat Zulmy Refky Adi Nata Reno Putra Riki Rinaldo Riri Ferdian Rizaldi Rizaldi Rizka Sestiana Rizki Aldi Saputra Rizki Putri Bungo Rully Septian Sahmijar Sahmijar Sumarya Sumarya Suryadi Putra Syakinah Hasibuan Syarif Hidayattullah Teddi Triandana Tiwi Melisa Wahyu Eko Prasetianto Wahyu Kurniawan Wahyu Marta Novri Wahyudi Saputra Wuni Aprila Yolanda Noverista Yoszi Mingsi Anaperta Yudi Andrian Yunasril Yunasril Zet Rahmadanil Zhilal Darma

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