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All Journal Brilliance: Research of Artificial Intelligence Jurnal Riset Teknik Pertambangan Bandung Conference Series: Mining Engineering Jurnal Pengabdian Ibnu Sina Tashdiq: Jurnal Kajian Agama dan Dakwah Jurnal J-PRES (Jurnal Pengabdian Rekayasa Sistem) ETHOS: Jurnal Penelitian dan Pengabdian kepada Masyarakat Prosiding Seminar Nasional Ilmu Sosial dan Teknologi (SNISTEK)
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Journal : Bandung Conference Series: Mining Engineering

 1 
Analisis Kestabilan Lereng Tambang Kuari Batu Trass di PT. Indocement Tunggal Prakarsa Desa Kedongdong Kidul Kecamatan Dukupuntang Kabupaten Cirebon Provinsi Jawa Barat Muhammad Afif Zahrandika; Yuliadi; Noor Fauzi Isniarno
Bandung Conference Series: Mining Engineering Vol. 3 No. 2 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i2.7858

Abstract

Abstract. Slope stability is an important factor in planning an open pit mine. A stable slope design will have a major impact on mine economics and production. This study aims to determine the stability of the slopes in the research location area and provide recommendations for optimal mine slope geometry based on the values of the Safety Factor (SF), Probability of Failure (PoF), and Strength Reduction Factor (SRF). Analysis activities were carried out using 2 methods, namely the limit equilibrium method accompanied by probabilistic analysis to determine the PoF value of the mine slope and using the finite element method. Based on the research results, it is known that the constituent rocks on the slopes of the Kedongdong quarry mine are trass stones. On a single slope the recommended mine slope geometry is H= 5 m and Ꝋ= 50o, H= 6 m and Ꝋ= 45o, H= 8 m and Ꝋ= 40o, H= 10 m and Ꝋ= 35o. On the actual overall slope an analysis of 2 sections was carried out, namely section A-A' and section E-E "from the results of the analysis of both sections in a safe condition. On the overall slope of the final pit, 2 sections were analyzed, namely section B-B' and section F-F' and from the results of the analysis both sections were in an unsafe condition, so a recommendation was given that section B-B' angle was changed from 47o to 37o while for section F-F' the angle was changed from 50o to 35o so that a safe FK value was obtained. Abstrak. Kestabilan lereng merupakan salah satu faktor penting dalam merencanakan tambang terbuka. Desain lereng yang stabil akan berdampak besar terhadap keekonomian dan produksi tambang. Penelitian ini bertujuan untuk mengetahui kestabilan lereng pada daerah lokasi penelitian dan memberikan rekomendasi geometri lereng tambang yang optimal dengan berdasarkan pada nilai Faktor Keamanan (FK), Probability of Failure (PoF), dan Strength Reduction Factor (SRF). Kegiatan analisis dilakukan dengan menggunakan 2 metode yaitu metode kesetimbangan batas disertai dengan analisis probabilistik untuk mengetahui nilai PoF dari lereng tambang dan menggunakan metode elemen hingga. Berdasarkan hasil penelitian diketahui bahwa batuan penyusun pada lereng tambang kuari kedongdong yaitu batu trass. Pada lereng tunggal geometri lereng tambang yang di rekomendasikan yaitu H= 5 m dan Ꝋ= 50o, H= 6 m dan Ꝋ= 45o, H= 8 m dan Ꝋ= 40o, H= 10 m dan Ꝋ= 35o. Pada lereng keseluruhan aktual dilakukan analisis terhadap 2 section yaitu section A-A’ dan section E-E” dari hasil analisis kedua section berada dalam kondisi aman. Pada lereng keseluruhan final pit dilakukan analisis terhadap 2 section yaitu section B-B’ dan section F-F’ dan dari hasil analisis kedua section berada dalam kondisi tidak aman, sehingga diberikan rekomendasi yaitu section B-B’ sudut diubah dari 47o menjadi 37o sedangkan untuk section F-F’ sudut diubah dari 50o menjadi 35o sehingga diperoleh nilai FK yang aman.
Analisis Faktor Keamanan Kuari D di PT. Indocement Tunggal Prakarsan TBK Desa Palimanan, Kecamatan Gempol, Kabupaten Cirebon, Provinsi Jawa Barat Chaerunisa Azzahra; Yuliadi; Iswandaru
Bandung Conference Series: Mining Engineering Vol. 3 No. 2 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i2.7875

Abstract

Abstract. PT Indocement Tunggal Prakarsa Tbk (ITP) is a cement producer in West Java with the second largest capacity in Indonesia and the largest integration in the world. In addition to producing cement, Indocement also produces ready-mix concrete, and manages aggregate and trass mines. this company has several Palimanan Quarries, including Kuari D. The condition of the rocks constituent on the slope has different structural conditions and complex geological structures. it is necessary to conduct geotechnical studies to analyze the geometry of the slopes of mine openings that have been planned by the company. Activities that need to be studied is recognize the physical properties, mechanics of rocks and rock mass classes. Data Processing Techniques that have been collected by calculating RQD and RMR on the mass of rocks that make up the slope based on the value of the sturdy position measured in the field for classifying rock mass. Software to determine potential avalanche types and making slope models with references to slope design geometry in the area using the help of software. After being studied, the rocks in the research area in Kuari D are limestone rocks with layer inserts in the form of Claystone Geotechnical mapping results obtained Rock Quality Design (RQD) 90-100%, Geological Strength Index (GSI) 42-55, and Rock Mass Rating (RMR) mapping results have good conditions with a range between 60-77. Stereographic analysis of the results of mapping weak or sturdy fields face of Kuari slope D has the potential in the form of wedge. Abstrak. PT Indocement Tunggal Prakarsa Tbk (ITP) merupakan salah satu produsen semen di Jawa Barat dengan kapasitas terbesar kedua di Indonesia dan terintegrasi terbesar di dunia. Selain memproduksi semen Indocement juga memproduksi beton siap pakai, serta mengelola tambang agregat dan trass. perusahaan ini memiliki beberapa Kuari Palimanan, diantaranya yaitu Kuari D. Kondisi batuan – batuan penyusun pada lereng memiliki kondisi struktur yang berbeda – beda dan kompleks akan struktur geologi. sehingga perlu dilakukan studi geoteknik untuk menganalisa geometri lereng bukaan tambang yang telah di rencanakan oleh pihak perusahaan. Kegiatan yang perlu dikaji yaitu mengenali sifat fisik, mekanik batuan dan kelas massa batuan. Teknik Pengolahan Data yang telah dikumpulkan yaitu dengan perhitungan RQD dan RMR terhadap massa batuan penyusun lereng berdasarkan nilai kedudukan kekar yang diukur pada lapangan untuk pengkelasan massa batuan. Mengetahui potensi jenis longsoran dan pembuatan model lereng dengan acuan dari geometri desain lereng pada daerah tersebut dengan menggunakan bantuan beberapa peragkat lunak. Setelah dikaji Batuan didaerah penelitian pada Kuari D merupakan batuan batugamping dengan sisipan lapisan berupa Batulempung Hasil pemetaan geoteknik didapatkan Rock Quality Design (RQD) 90 – 100 %, Geological Strength Index (GSI) 42-55, dan Rock Mass Rating (RMR) hasil pemetaan memiliki kondisi baik dengan range antara 60 –77. Analisis stereografis hasil pemetaan bidang lemah atau kekar pada muka lereng Kuari D memiliki potensi berupa longsoran Baji.
Karakteristik Fisik dan Mekanik Pasta Fill Sebagai Material Backfill Pada Proses Ground Support Di Underground Kencana, PT. Nusa Halmahera Minerals, Provinsi Maluku Utara Hafizh Murtadho; Yuliadi; Yunus Ashari
Bandung Conference Series: Mining Engineering Vol. 3 No. 2 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i2.7995

Abstract

Abstract. PT Nusa Halmahera Minerals is a mining company engaged in the gold mining business located in Gosowong, North Maluku. Mining is carried out with Open Pit Mining System and Underground Mining System using Open Pit Mini ng and Underhand Cut and Fill types. Geotechnical conditions in the Underground Mine are the main consent for the company by considering the safety of workers. There are several factors that can affect tunnel stability, including the condition of rock lithology, rock deformation, and groundwater conditions that interfere with ground support. Based on the actual situation in the field, there are still several active headings that are disturbed due to excessive groundwater which makes the mining cycle hampered due to the rehabilitation process, the presence of groundwater affects the condition of strengthening ground support in pasta fill (backfill) so that the tunnel has the potential to experience squeezing or shrinkage and rock collapse / collapse caused by load stress on rocks due to mining activities, Based on the results of observations and calculations, the 24% paste fill mix design conditions decreased in strength to 0.771 Mpa, with a Strength Factor value of 0.95 - 6. And get a total displacement value of 0.02 - 0.38 m. Geotechnic Monitoring Lidar validation states that there is movement in the roof and wall area in the K2-16 Sill area with a velocity value of 0.151 mm per day. Mix design recommendations affect the strengthening of ground support so as to maintain an optimal mining cycle and achieve the company's target. Abstrak. PT. Nusa Halmahera Minerals merupakan perusahaan tambang yang bergerak di bidang usaha pertambangan emas yang berlokasi di Gosowong, Maluku Utara. Penambangan dilakukan dengan Sistem Tambang Terbuka dan Sistem Tambang Bawah Tanah menggunakan jenis Open Pit Mining dan Underhand Cut and Fill. Kondisi geoteknik pada Tambang Bawah Tanah merupakan consent utama bagi perusahaan dengan mempertimbangkan keselamatan para pekerja. Terdapat beberapa faktor yang dapat mempengaruhi kestabilan terowongan, diantaranya kondisi lithology batuan, adanya deformasi batuan, dan kondisi air tanah yang mengganggu terhadap ground supporting. Berdasarkan keadaan aktual di lapangan masih terdapat beberapa heading aktif yang terganggu akibat adanya air tanah yang berlebih sehingga membuat siklus penambangan terhambat akibat adanya proses rehab, adanya air tanah berpengaruh terhadap kondisi penguatan ground support pada pasta fill (backfill) sehingga terowongan berpotensi mengalami squeezing atau penyusutan dan runtuhnan batuan/collapse yang diakibatkan oleh load stress pada batuan akibat aktivitas penambangan tersebut. Berdasarkan hasil pengamatan dan perhitungan kondisi mix design pasta fill 24% mengalami penurunan kekuatan menjadi 0,771 Mpa, dengan nilai Strength Factor sebesar 0.95 – 6. Dan mendapatkan nilai total displacement sebesar 0.02 – 0.38 m. Validasi Geotechnic Monitoring Lidar menyatakan adanya pergerakan pada area roof dan juga wall di area K2-16 Sill dengan nilai velocity 0.151 mm per harinya. Rekomendasi mix design berpengaruh terhadap penguatan ground support sehinga mampu menjaga siklus penambangan yang optimal dan mencapai target dari perusahaan.
Prosedur Penentuan Nilai California Bearing Ratio (CBR) untuk Jalan Tambang di PT Indocement Tunggal Prakarsa Desa Palimanan, Kecamatan Gempol, Kabupaten Cirebon, Provinsi Jawa Barat Muhammad Hilal Fadilah; Yuliadi; Iswandaru
Bandung Conference Series: Mining Engineering Vol. 3 No. 2 (2023): Bandung Conference Series: Mining Engineering
Publisher : UNISBA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/bcsme.v3i2.8004

Abstract

Abstract. PT Indocement is a cement processing plant in West Java with the largest capacity in Indonesia and the largest integrated in the world, namely PT Indocement Tunggal Prakarsa Tbk. By implementing many security management systems for each job, namely SMK3 (K3 management system), ISO 9001 (product quality standards), ISO 14001 (Environmental management system), OHSAS 18001 and ISO 17025. PT Indocement Tunggal Prakarsa Tbk is the first company in Asia Southeast which received Certified Emission Reductions (CER) under the Clean Development Mechanism (CDM) framework. Paving the road is done to minimize the occurrence of subsidence on the mine road. The proctor test is carried out to determine the optimum water content in a soil, in various types of road construction materials, of course, they have different water content for absorption, both porosity and permeability. Having a water content value will help in laboratory CBR testing to get a percent value of CBR. Knowing the CBR value of mine roads is very important because the safety of mine roads is very crucial, if there is no evaluation it will cause productivity to become unstable and can cause losses. CBR testing was carried out on rock samples that were scattered to become soil, laboratory CBR testing was carried out without immersion. The CBR values ​​obtained from the 5 samples were quarry claystone c 16.65, sandstone 77.4%, andesite 97%, quarry claystone b1 47%, siltstone 13.7%. Abstrak. PT Indocement merupakan pabrik pengolahan semen di Jawa Barat dengan kapasitas terbesar di Indonesia dan terintegrasi terbesar di dunia adalah PT Indocement Tunggal Prakarsa Tbk. Dengan menerapkan banyak sistem manajemen pengamanan pada setiap pekerjaan yakni SMK3 (sistem manajemen K3), ISO 9001 (Standar kualitas produk), ISO 14001 (sistem manajemen Lingkungan Hidup), OHSAS 18001 dan ISO 17025. PT Indocement Tunggal Prakarsa Tbk adalah perusahaan pertama di Asia Tenggara yang menerima Emisi Reduksi yang disertifikasi (Certified Emission Reductions/CER) dalam kerangka Mekanisme Pembangunan Bersih (Clean Development Mechanism/CDM). Proctor test dilakukan untuk mengetahui kadar air optimum pada suatu tanah, dalam berbagai jenis material penyusun jalan tentunya memiliki kadar air yang berbeda untuk daya serap baik itu porositas maupun permeabilitasnya. Dengan adanya nilai kadar air akan membantu dalam pengujian CBR Laboratorium untuk mendapatkan nilai persen dari CBR. Mengetahui nilai CBR jalan tambang sangat penting dikarenakan keamanan jalan tambang sangat krusial, jika tidak adanya evaluasi akan menyebabkan produktivitas tidak menjadi stabil dan bisa membuat kerugian. Pengujian CBR yang dilakukan pada sampel batuan yang diberaikan menjadi tanah, dilakukan pengujian CBR laboratorium tanpa adanya rendaman. Nilai CBR yang didapatkan dari ke 5 sampel yaitu ada batulempung kuari c 16,65, batupasir 77,4%, batu andesit 97%, batulempung kuari b1 47%, batulanau 13,7%.
Co-Authors Afriyani Andi Maulana Yusuf Aziz Al-Haq, Saepul Baldan Al-Kautsar, Muhammad Br Purba, Neni Marlina Chaerunisa Azzahra Dinola Dwihandoyo Marmer Dzil Ikram, Fadhli E Janrosl, Viola Syukrina Ekastini Elfida Moralista Fahri Al Hakim, Sudrajat Fathkul Qorrib Hafizh Murtadho Hamdan, Fahri Hidayatullah, Krispian Fathan Iqbal Ismail Iswandaru Jati Nugroho Julkarnain, M. Juniardi Akhir Putra Khoerunnisa Prihatini Mardinata, Erwin Melizani Muftiasari Muhammad Afif Zahrandika Muhammad Hilal Fadilah Noor Fauzi Isniarno Noufal Abhinaya Nuryadi, Halid Oktavia, Siska Atmawan Poniman Prabowo, Jerry Dwifajar Prima, Argo Putra Purba, Neni Marlina BR Rodianto, Rodianto Salsabiela, Aghrid Sitorus, David Humala Sofya, Nora Dery Yunus Ashari Zaenal Zetli, Sri