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Strategy for technology energy selection to achieve coal value added in PT. Bukit Asam (Persero), Tbk., Rostiarti, Peni; Ibrahim, Eddy; Toha, Taufik
Indonesian Journal of Fundamental and Applied Chemistry Vol 2, No 3 (2017): October 2017
Publisher : Indonesian Journal of Fundamental and Applied Chemistry

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Abstract

The role of coal in providing national energy has already increased nowadays, and still taking an important subject. Government obligation to support added value is not really encourage industry player to applied technology energy that has been developed widenly in South Africa, China and others developing country. The scope of this research is technology energy for coal diversification, such as Coal Upgrading, Coal Gasification, Coal Liquefaction, Coal Water Mixture, and applied Coal Bed Methane Technology that extract gas methane from the pore of coal. The purpose of this research is to estimate coal resources, quality range and to select technology energy that can be potentially develop in PT. Bukit Asam (Persero), Tbk. Coal Resources and coal quality in each mining licences area becomes the basic strength for developing technology energy as part of SWOT Analysis. Based on the SWOT Analysis from 5 technology energy then the scope limited into 3 highest technology energy that is Coal Gasification, Coal Liquefaction and Coal Bed Methane as the most potential technology energy to develop in PT. Bukit Asam (Persero), Tbk. 
Study of Ground Vibration Reduction Using Fault Tree Analysis Method on Blasting Activity in PT. Semen Baturaja Persero, Tbk. Lubis, Jihan F.; Toha, Taufik; Ngudiantoro, Ngudiantoro
Sriwijaya Journal of Environment Vol 3, No 1 (2018): Mining Activities
Publisher : Program Pascasarjana Universitas Sriwijaya

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Abstract

Abstract Limestone mining activities at PT. Semen Baturaja Persero, Tbk use blasting activity that produces ground vibrations. Based on the measurement result on vibration level, the maximum value for vibration is 4.66 mm/s. The results of the data show that the level of emission has exceeded the standard limits for second class buildings (3 mm/s) based on (SNI) 7571: 2010 while the blasting activity is only 175-300 m from the nearest settlement. Fault Tree Analysis is used to analyze undesired events in a system or work set. Reconstruction of Fault Tree Analysis with Boolean algebra yields 5 event combinations that have the highest chance of generating ground vibrations. The event with the highest failure rate is X11 (the number of bursting holes simultaneously) with failure rate of 0.813 and X12 (fast timing delay) with failure rate (0.750). The USBM formulation obtained 3 mm/s vibration results when the number of bursting holes was reduced from 5 holes to 2 holes/delays with a quantity of 43 kg/delay. Based on Shotplus simulation, the company is advised to replace the blasting delay system from electricity to electronics to produce minimal explosion of ground vibration so as not to damage the environment.Keywords: Blasting, flyrock, Vibration, powder factor Abstrak (Indonesian) Proses peledakan batu kapur di PT. Semen Baturaja Persero, Tbk, menghasilkan efek peledakan berupa getaran tanah. Berdasarkan hasil pengukuran terhadap tingkat getaran didapatkan nilai maksimum untuk getaran sebesar 4.66 mm/s. Hasil data menunjukkan tingkat geraran telah melebihi batas standar untuk bangunan kelas dua 3 mm/s (SNI) 7571:2010, sementara kegiatan peledakan hanya berjarak 175-300 m dari pemukiman terdekat. Fault Tree Analysis digunakan untuk menganalisis kejadian (undesired event) yang tidak diinginkan dalam sebuah sistem atau rangkaian pekerjaan. Rekonstruksi Fault Tree Analysis dengan analisis aljabar Boolean menghasilkan 5 kombinasi event yang memiliki peluang tertinggi untuk menghasilkan getaran tanah. Event dengan tingkat kegagalan tinggi adalah event X11(jumlah lubang meledak bersamaan) dengan laju kegagalan 0.813 dan X12 (delay timing cepat) dengan laju kegagalan (0.750). Formulasi USBM memperoleh hasil getaran 3 mm/s apabila jumlah lubang yang meledak bersamaan direduksi dari 5 lubang menjadi 2 lubang perdelay dengan kuantitas 43 kg/delay. Berdasarkan simulasi softwate shotplus perusahaan disarankan untuk mengganti sistem delay peledakan dari listrik menjadi elektronik untuk menghasilkan peledakan yang minim getaran tanah sehingga tidak merusak lingkungan.  
Analysis of the Blasting Effect on the Environment around Blasting Areas at Pt. Semen Baturaja Persero, Tbk. Lubis, Jihan Farhan; Toha, Taufik; Ngudiantoro, Ngudiantoro
Indonesian Journal of Environmental Management and Sustainability Vol 1 No 1 (2017): December
Publisher : ARTS Publishing

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Abstract

Semen Baturaja Persero, Tbk is one of the companies engaged in the production of cement that takes raw materials through limestone mining process located in Baturaja City, OKU Regency, South Sumatera Province. Limestone mining activities use blasting activity that produces blasting effects and flyrock. Measurements of vibration and flyrock frequencies obtained a maximum value for vibration of 4.66 mm/s and predicted farthest distance of flyrock above 170 m when powder factor exceeds 0.1 kg/m3. The results of the data show that the level of emission has exceeded the standard limits for second class buildings (3 mm/s) based on (SNI) 7571: 2010. Blasting just 175-300 m from the nearest settlement and already exceed the save distance for equipment 300m and 500m for human activity based on USBM (United States Bureau of Mines). To reduce the vibration level, the maximum number of mass per delay is 43 kg/delay with PPV parameter 3 mm/s at 170m distance. Actual factor powder should not exceed 0.1 kg / m3 to minimize flyovers in safe zones not exceeding 150 m.
CALCULATION OF PIT 2 PRODUCED OVERBURDEN VOLUME AND THE ANALYSIS OF PREPARATION OF PIT 1 MINE VOID UTILIZATION AT SUPAT BLOCK PT. BATURONA ADIMULYA MUSI BANYUASIN, SOUTH SUMATERA Harsiga, Edwin; Toha, Taufik; Komar, Syamsul
Indonesian Journal of Environmental Management and Sustainability Vol 2 No 2 (2018): June
Publisher : ARTS Publishing

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Abstract

PT BaturonaAdimulya is a coal mining company located in BabatSupatSubdistrict, MusiBanyuasin Regency, South Sumatera Province. Based on the calculation of overburden digging volume at Pit 2 with progress survey that is measurement using total station sokkia set 3010 instrument and the processing and calculation using surpac 6.5.1 result in overburden volume or cover ground 251,941 BCM. Coal mining in open pit will cause environmental changes, either small hills or mined holes (voids). The burden removing from Pit 2 by backfilling method in the mining area will minimize the voids that occur. PT BaturonaAdimulya has void in Pit 1 as large as 4.8 Ha, and will do backfilling that requires overburden material as much as 295.721 BCM / Ha and top soil as much as 33,600 LCM / Ha. The voids left at the end of the mine without any utilization planning have the potential to cause undesirable impacts on the environment. Therefore, PT BaturonaAdimulya is planning to revegetate the void area so it can be utilized and become a green field again as before
Rancangan Sistem Waktu Tunda Peledakan Nonel Untuk Mengurangi Efek Getaran Tanah Terhadap Fasilitas Tambang Noviansyah, M. Romi; Toha, Taufik; ., Bochori
Jurnal Pertambangan Vol 1, No 3 (2017)
Publisher : Jurusan Teknik Pertambangan Universitas Sriwijaya

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Abstract

Sistem waktu tunda peledakan nonel yang sering digunakan PT. Semen Padang adalah echelon dan v-cut. Beda waktu tunda antar lubang ledak pada sistem waktu tunda echelon yang digunakan telah mencapai 8 ms, tetapi sering digunakan pada kondisi peledakan yang hanya memiliki free face di bagian depan dan atas. Sistem waktu tunda v-cut yang digunakan terkadang tidak memiliki beda waktu tunda 8 ms antar lubang ledak sehingga menyebabkan beberapa lubang meledak bersamaan. Burden pada row depan tidak dapat berpindah dengan jarak yang cukup untuk menyediakan free face baru pada row selanjutnya jika sistem waktu tunda yang digunakan kurang sesuai dengan kondisi free face. Kombinasi waktu tunda antar row yang tidak dirancang dengan baik akan mengakibatkan confinement pada ledakan dan meningkatkan getaran tanah. Lubang ledak yang meledak bersamaan dapat meningkatkan getaran tanah karena penggunaan bahan peledak yang semakin banyak akan meningkatkan energi yang dihasilkan. Aktivitas peledakan mengakibatkan getaran tanah yang dapat menyebabkan kerugian di lingkungan sekitar area tambang, baik yang berpengaruh pada fasilitas dan peralatan tambang maupun bangunan jika tidak dikontrol dengan baik. Salah satu cara yang paling efektif untuk mengurangi tingkat getaran tanah yang dihasilkan aktivitas peledakan nonel adalah merancang sistem waktu tunda yang sesuai dengan kondisi free face dan memiliki beda waktu tunda 8 ms antar lubang ledak. Perancangan sistem waktu tunda peledakan nonel yang lebih disesuaikan dengan kondisi free face dengan beda waktu tunda 8 ms antar lubang ledak dapat mengurangi PPV rata-rata yang dihasilkan. PPV rata-rata yang sebelumnya sebesar 1,41 mm/s berkurang menjadi 1,01 mm/s.