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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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Evaluasi dan Rancangan Sistem Ventilasi Pada Lubang Tambang BMK-35 CV. Bara Mitra Kencana, Tanah Kuning, Desa Batu Tanjung, Kota Sawahlunto Andi Asmunandar; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

In underground mining activities required mine ventilation, it use to include fresh air needed by miners. Methane gas explosion has occured in CV. Bara Mitra Kencana on Wednesday, March 29, 2017. The tunnel location of explosion is currently contiguous to the location of the mine plan progress (BMK-35) that following the direction of coal deployment that has the potential of methane gas hazards, cause of that a good ventilation system design is required to prevent the explosion. After the evaluation there was a difference quantity of air entering and exit air, the air inside is 6,66 m3/s and the quantity of air outside is 6,33 m3/s. This is caused by ripped of the duct at the air intake is much as 6 points. Air temperature at the mine pit BMK-35 increased temperature of 1oC every 100 m of mine progress. Based on the evaluation results, the use of fan/blower with a capacity of 200 m3/min with a system of ducts using continue system every space 100 meters progress of underground mine. Based on the calculation the amount of air requirement is 4,05 m3/s while the venting capacity of the forcing fan and the suction vent (exhaust fan) is 12,02 m3/s. Based ;on that, we can concluded the addition of exhaust fan on canopy 3 already suffice the air requirement to support mining operational activities. Installation of the exhaust fan is doing to anticipate the accumulation of high methane gas, as one of the ventilation functions is to dissolve and bring out impurities from the gases in the mining area, so as to achieve a condition that is eligible to prevent the occurrence of gas explosions in minesKeywords: Evaluation, Ventilation System, Underground Mine, Velocity of Air, Air Volume

Analisis Kestabilan Lereng Puncak Jaya di CV. Tekad Jaya Nagari Tanjung Gadang, Kecamatan Lareh Sago Halaban, Kabupaten 50 Kota. Jeremyes A.P; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 6, No 1 (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.v6i1.111758

Abstract. The mining industry is very influential industry in various aspects of life today, such as building offices, housing, and etc. The mining industry has also influenced Indonesia's economic development. CV. Tekad Jaya is a limestone mining company that has not conducted a study on slope stability in the mining area. Because there has not been a study of the stability of the slope, it makes workers who are working in the area around the slope uncomfortable. Therefore, the company wants to conduct a study on the stability analysis of puncak jaya. This study, the RMR (rock mass rating) method was used to measure the rock. For geotechnical parameters, tests were carried out with the results of the physical and mechanical properties of limestone rock with the unit weight value of 9.51 KN/m3 , the saturation weight of 11.80 KN/m3 , and in a dry state the weight value is 6.62 KN/m3 with cohesion (c) = 20.3 KN/m2 and the friction angel (ϕ) = 60.675˚. Analysis of the safety factor (FK) and slope modeling used the Janbu simplified method. The results of the first study the type of landslide that may occur in the mining area is the direct landslide with a potential of 20%. The second results of the Rock Mass Classification based on the RMR Rock Method have good quality and in class II. The third recommendations for safety factor slopes for mining areas that have a height of 80 m with a slope of 76˚ have been changed to a height of 80 m with a slope of 67˚, then the safety factor values for each are in three conditions, is: in the naturale state 1,432, saturated 1,335, and dry 1,546 Keywords: physical and mechanical properties of rocks, rock classification, RQD, slope geometry, slope stability, janbu simplefied

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 Riki Rinaldo; Bambang Heriyadi; Heri Prabowo
Journals Mining Engineering : Bina Tambang Vol 3, No 3 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

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

Evaluasi Kebutuhan Pompa Multliflow MF-420EXHV Untuk Pengeringan Sump di Pit 7 West PT. Bukit Makmur Mandiri Utama Jobsite Binungan Suaran Tiwi Melisa; Yoszi Mingsi Anaperta; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 6, No 2 (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.v6i2.111695

Abstract. Mining activities carried out by PT. Bukit Makmur Mandiri Utama Jobsite Binungan Suaran uses a combination method of digging and loading (excavator) and transportation equipment (dump truck). The mining system implemented by PT. Bukit Makmur Mandiri Utama Jobsite Binungan Suaran is a surface mining system with the open pit method. The application of the open pit method will cause the formation of large basins so that it is very potential to become a water storage area, both from surface runoff and groundwater. At pit 7 west PT. Bukit Makmur Mandiri Utama Jobsite Binungan Suaran, there is a sump located at an elevation of -101 masl. Directly below the sump is a coal seam. Economically, the layer is feasible to be mined, so that the sump drying is planned, it is necessary to evaluate the pump capacity currently used so that the drying process can run well according to the target time so that the mining process can be carried out immediately. A dewatering system is used to dry the sump. Based on the results of the analysis that has been done, the catchment area in pit 7 WEST is 312.04 ha, with a planned rainfall of 8.46 mm / day and a rain intensity of 1.14 mm / hour. Water discharge Surface runoff by rainwater in the catchment area 7 west is 24769.04 m3 / day, groundwater discharge is 386.12 m3 / day and evapotranspiration discharge is 128.61 m3 / day. So that the total volume of water that enters the 7 west sump pit is 25026 m3 / day. So, the number of Multiflo MF- 420EXHV pumps needed to compensate for the daily discharge in the MTBU-B area is 2 pump units, with a pump working duration of 20 hours / day.Keywords: Open pit, Pit 7 west, Sump, Water Discharge, Pump

Evaluasi dan Penyesuaian Sistem Ventilasi Pada Tambang Batubara Bawah Tanah Lubang 02 PT.Cahaya Bumi Perdana, Kota Sawahlunto, Provinsi Sumatera Barat. Rizki Putri Bungo; 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.v5i4.109271

Abstract.PT.Cahaya Bumi Perdana is one of the underground coal mining companies in Sawahlunto City that applies the room and pillar mining method. The ventilation system used is a forcing system by arranging the blower in a relay. The blower system installation is not followed by the suction blower installation, so that dirty air is not immediately circulated out. Dirty air resulting from mining activities from one front is pumped back to the next front and increases the increase in dust density and temperature. From the results of temperature measurements in the main 02 hole (L02U) 28.6ºc and in the accompaniment 02 hole (L02P) 26.9ºc. The average humidity in L02U is 91.4% and in L02P 90.3%. This is contrary to government regulations in Kepmen 1827 K / 30 / MEM / 2018 which states "Air temperatures in underground mines must be maintained between 18ºc to 24ºc with a maximum relative humidity of 85%" so evaluation must be carried out. The total air requirement for mining activities in L02U is 12.6032 m3 / sec and in the L02P hole is 11.3205 m3 / sec. To meet these needs, the main hole requires 9 blowers and the accompanying hole needs 6 blowers, so that each hole must be added by 1 blow blower. In order to make the hole condition more comfortable, it needs to be added with a suction fan unit to accelerate the transportation of dirty air to the outside of the hole. Ventilation system modeling produces 3D ventilation system models before and after the addition of a blower. Keywords: Blower, Temperature, Humidity, Speed, Evaluation, Ventilation System Modeling

Analisis Beban Runtuh dan Evaluasi Lubang Bukaan Berdasarkan Metode Rock Mass Rating dan Q-System pada Tambang Bawah Tanah CV. Bara Mitra Kencana, Kota Sawahlunto, Sumatera Barat Ilep Prengki; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract.The excavation of a underground rock mass resulting a change in the balance of rock conditions such as the occurrence of rock collapse and changes in the dimensions of tunnel as a result of the displacement of the voltage distribution. It is desirable to have a good geotechnical analysis to provide an appropriate treatment of rocks excavated. This research was conducted to determine rock mass class, rock strength at BMK 34 CV Bara Mitra Kencana. Classification of rocks mass with RMR system And Q-System FK potential of wedge using unwedge software. From the measurement of several parameters of RMR method, RMR value of 48 ( Coal) and 60 (Sillstone) is obtained where as rock mass class III (fair rock), based on the Q-System obtained a value of 14 in class II for coal and 4 Class III for Sillstone. Based on the RMR-system classification, the value for span maximum is 3 m with a collapse time of 110 hours and the value of the load collapses is 1,56 tons / m2. Based on the Undwedge Software processing, there was an increase in FK values for both methods, Based on Support RMR Ground from 1,907 to 2,939 and Based on Ground Support Q-System from 1,907 to 2,078.Keywords : Underground, Rock Mass Ratting, Q-System, Safety Factor, Ground Support

EVALUASI KESTABILAN LUBANG BUKAAN DAN SISTEM PENYANGGAAN BERDASARKAN KLASIFIKASI GEOMEKANIKA PADA TAMBANG BATUBARA BAWAH TANAH SD-C2 LORI 1 DI PT. NUSA ALAM LESTARI, KOTA SAWAHLUNTO. Yudi Andrian; 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.v6i4.113846

Underground mining is a mining system in which all activities take place below the earth's surface. In practice in the field, mining is carried out by making tunnels as access for lorries and opening paths and then opening branches using the Room and Pillar method. This research was conducted to determine rock strength, rock mass class, potential for wedge failure, stability of the hole opening, and recommendations for the appropriate support system based on rock mass rating and distance of the support. Based on the results of the analysis at a RMR value of 61,63 and 66 the FK value <1.5 using an average buffer distance of 2.01 m, it is necessary to change the distance between the supports to get a stable FK value (≥1.5). From the calculation results to achieve a stable FK value, at a RMR 61,63,and 66 the exact buffer distance ranges from 1.8 m - 2.1 m.

Analisis Kestabilan Lereng Pada Penambangan Batu Andesit PT. Ansar Terang Crushindo 1, Kecamatan Pangkalan Koto Baru, Sumatera Barat Novita Tria Putri; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 5, No 3 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. The existence of weak fields that affect the stability of the slopes in the mining of PT. Ansar Terang Crushindo 1. The stability of the mine slope is the most important factor that must be considered in the continuation of mining activities. Initial slope geometry has a single slope with a height of 25m with a slope of 820. The slope geometry planning will be used by the Morgenstern Price methods. As a result of research, the following conclusions are drawn. The type of potential that occurred at the study site was a wedge failure with a potential of 10,93%. The analysis characterization of rock mass based on the analysis of RQD, RMR rock types on location classified in the class fair rock. Second, the results of the analysis of single slope of actual earned value FK = 1,911 (natural conditions) and FK= 1,001 (saturated condition). Third, to obtain a safe FK that is 1,3, the geometry of the slope is modified the geometry of the slope is modified, namely with a slope height of 25 m and slope 78° in saturated condition then FK 1,477 slope in safe condition.Keywords : slope stability analysis, RQD, RMR, morgenstern price method, wedge failure

Analisis Probabilitas Kelongsoran Menggunakan Metode Monte Carlo Pada Highwall Pit SB-II BK-14 PT. Trubaindo Coal Mining, Site Melak, Kabupaten Kutai Barat, Kalimantan Timur Panji Kurnia Wiradani; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 3, No 4 (2018): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. The wider and deeper the mine open in excavation, the greater the risks will arise or further improve uncertainty, on the factors that affect the stability of that open mining slope. This relates to the spatial variabelity in rocks laboratory testing, the handling of land cover, ground water level, and the weather. To predict the possibility of landslides, landslide probability analysis is applied by using the Monte Carlo method. The study was conducted on pit Highwall SB-II BK-14 especifically in cross section of A-A', B-B ',C-C’ D-D '. sequens mining Septermber 2017. The data obtained is the classification of rocks masses with RMR and GSI criteria, the slopes geometry, the ground water level, the physical and mechanical properties of rocks, and seismic hazard. Based on data processing, cross-section A-A has the landslide probability of 10.5% with FS (deterministic) 1.25 and Reliabilty index 1.12 (<3 means unreliable design) for cross-section B-B ', C-C’ and D-D ' has no value of landslide probability, but it does not mean there is no possibility, as the mining activities progress the landslide probability will increase. Keywords: Geotechnical, Probability analysis, Geological strength Indexs, Rock Mass Rating, Monte Carlo method

Analisis Klasifikasi Massa Batuan dan Potensi Longsor Pada Area Pit Timur Tambang Terbuka PT. Allied Indo Coal Jaya, Kota Sawalunto, Sumatera Barat Rizki Aldi Saputra; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 4, No 3 (2019): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Abstract. Based on observations made on the slopes in the pit area east of the open pit PT. Allied Indo Coal Jaya, found rock slope which has a height of 16 meters, slope angle is 74 and has many weak plane structures that can cause landslides. Therefore it is necessary to analyze the rock mass and the stability of the slope. From the analysis that has been done, the rock mass classification value is 50, with medium quality and safety factor value at saturation condition is 1,117, original condition is 2,779, dry condition is 2,749 and actual condition in field is 1,789. So it can be concluded that the slope condition is stable, except when saturated. Therefore, improvements need to be made in the form of reducing the slope angle to 66º, so that the value of the saturated slope safety factor changes to 1.596.Keywords: Open pit, slope, landslide, rock mass, safety factor

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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