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

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Pengaruh Penggunaan Blower & Es Batu Pada Alat Simulasi Ventilasi Tambang Bawah Tanah Dalam Upaya Penurunan Suhu Untuk Skala Laboratorium Wuni Aprila; Bambang Heriyadi; Heri Prabowo; Jukepsa Andas
Journals Mining Engineering : Bina Tambang Vol 8, No 3 (2023): 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.v8i3.126020

Abstract

Increased temperatures in Underground Mines can cause uncomfortable working conditions and negatively impact workers' health. If there is a temperature or increase in temperature that exceeds the standards determined by the Decree of the Director General of Minerals and Coal, Ministry of Mineral Resources and Mineral Resources No. 185.K/30DJB/2019, it is important to identify efforts to reduce the temperature in the work environment. This research wants to reveal the effect of using ice cubes to reduce the temperature which is simulated in an underground mine ventilation simulation tool in the laboratory, then the results obtained will be implemented in field conditions and the results will be correlated with needs in the field. The data taken to obtain results using a simulation tool in the laboratory was done using 2 experiments, where experiment 1 used 2 kg of ice cubes, at dry temperatures it could not reduce 1°C while at wet temperatures it could reduce ±1°C. Then in experiment 2 using 5kg ice cubes, the results showed that the dry temperature could decrease by ± 1°C and the wet temperature could decrease by ± 2°C. For humidity when using ice cubes there is not much change, only around ±5% but still remains within the threshold value.The correlation results when placed in the field from simulation tools in the laboratory are that in experiment 1 it requires 25 kg of ice cubes to reduce 1°C in wet temperature only, and in experiment 2 it requires 61 kg of ice cubes to reduce 1°C in dry temperature and 2°C at wet temperatures.To obtain correlation results, they are placed in field conditions in accordance with established standards, for Tunnel A location requires 183 kg of ice cubes, Tunnel B 244 kg of ice cubes, Tunnel A to Tunnel B as much as 183 kg of ice cubes, Branch 1 Tunnel 2 had 244 kg of ice cubes and Branch 2 Tunnel B had 305 ice cubes.
Evaluasi Kestabilan Lubang Bukaan dan Sistem Penyanggaan dengan RMR-System pada Terowongan D-07 Tambang Batubara PT Dasrat Sarana Arang Sejati, Kota Sawahlunto, Provinsi Sumatera Barat Ariq Jibran; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 9, No 2 (2024): 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.v9i2.128691

Abstract

PT. Dasrat Sarana Arang Sejati merupakan salah satu perusahaan yang bergerak di bidang pertambangan batubara, dengan menggunakan metode penambangan tambang bawah tanah yang mana lebih berisiko terjadinya kecelakaan daripada metode tambang terbuka. Pada observasi ditemukan adanya kekar pada dinding terowongan yang berpotensi terjadinya runtuhan. Penelitian ini dilakukan untuk mengetahui kekuatan batuan, kelas massa batuan, potensi keruntuhan baji, kestabilan lubang bukaan, dan rekomendasi sistem penyangga yang tepat berdasarkan hubungan kelas massa batuan dan jarak penyangga yaitu metode klasifikasi Rock Mass Rating (RMR-System).Dari hasil analisis yang dilakukan diketahui bahwa rata rata kelas massa batuan pada siltstone adalah batuan kelas II (Good Rock) dengan nilai RMR 70 dengan Stand Up Time 32000 jam (±6 bulan) jarak Span 4 m, pada batubara kelas massa batuannya termasuk ke dalam kelas III (Fair Rock) dengan nilai RMR 47 dengan Stand Up Time 212,5 jam (±9 hari) jarak Span 3 m. Berdasarkan hasil analisis pada nilai RMR 47 nilai FK < 1,5 dengan menggunakan jarak penyangga rata-rata 1,71 m, maka perlu dilakukan evaluasi jarak antar penyangga untuk mendapatkan nilai FK stabil (≥1,5). Dari hasil perhitungan untuk mencapai nilai FK stabil digunakan jarak penyangga rekomendasi ± 1,437 m pada RMR 47.
ANALISIS KESTABILAN LUBANG BUKAAN DENGAN METODE RMR-SYSTEM PADA LUBANG PENDIDIKAN JALUR J.3F – J.37 UNDERGROUND MINE PT. BUKIT ASAM OMBILIN SAWAHLUNTO Wahyudi Saputra; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 8, No 3 (2023): 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.v8i3.125993

Abstract

The strength and shape of rock masses can be affected by tunnel excavation, so rocks will seek a new equilibrium as a result of such treatment. The displacement of tunnel walls and roofs, the occurrence of collapses in tunnels are signs of the rock's tendency to seek a free field where it can deform and allow a new equilibrium to be established.Using a method based on Bieniawski 1989, the RMR-System was used to weight the different rock mass classes. In this analysis, rock grades are weighted based on the compressive strength characteristics of the rock, Rock Quality Designation, discontinuity distance, groundwater conditions, and orientation of the bristles towards the tunnel. Rock mass class values, rock strength, collapse potential, holding time values, and buffer recommendations based on rock mass class values are the outputs of this analysis.Based on the measurements made for various parameters of the RMR method, the claystone at the J.3F - J.37 opening is in class III (fair rock) with an RMR value of 59, and the coal is in class III (fair rock) with an RMR value of 53. The stress values received at the cap and side post are 604.01 kg/cm2 and 150.67 kg/cm2, respectively, with a wood bending strength value of 800 kg/cm2 and a wood compressive strength of 470 kg/cm2.The recommended design of the three piece set wooden support is the length of the cap of 2.9 m, the bottom width of 3.4 m, the height of 2.4 m, the distance between the supports of 0.7 m, the diameter of the support of 18 cm with the FK value on the cap of 1.51. Meanwhile, the distance between supports of 1.2 m uses wood with a diameter of 22 cm with an FK value on the stamp of 1.61.
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