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syamsul komar
Universitas Sriwijaya
Chemical Engineering, Chemistry & Bioengineering Engineering

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PENGARUH AIR ASAM TAMBANG TERHADAP STABILITAS CHECK DAM DI PT BUKIT ASAM (PERSERO), TBK TANJUNG ENIM PROPINSI SUMATERA SELATAN sepriadi sepriadi; marwan asof; syamsul komar
Jurnal Teknik Patra Akademika Vol 7 No 01 (2016): Jurnal Teknik Patra Akademika
Publisher : Politeknik Akamigas Palembang

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Abstract

Dalam proses penambangan diperlukan adanya tempat penampungan air asam tambang. Tempat penampungan air asam tambang dibuat berupa kolam pengendap lumpur (KPL), dimana pada setiap kolam dibatasi oleh tanggul penahan (check dam). Pembuatan check dam dilakukan dengan melakukan penggalian di lokasi yang sudah ditentukan. Selain itu, terdapat juga check dam yang dibuat dengan melakukan penimbuan sebagai tanggul penahannya, ini dilakukan pada check dam yang terbuat dari tanah timbunan yang terdapat di lokasi Muara Tiga Besar Selatan (MTBS) PT Bukit Asam (Persero), Tbk. Hal ini dikarenakan KPL di lokasi MTBS terbuat dari tanah timbunan. Pada check dam ini dilakukan pengukuran terhadap tingkat keasaman air di kolam. Hasil pengukurannya didapat pH 3,9 dan 4,0 yang selanjutnya dibuat sebagai variabel bebas. Setelah itu, parameter pendukung stabilitas tanggul dihitung dan selanjutnya akan menjadi variabel terikat meliputi sudut geser dalam, kohesivitas dan permeabilitas serta faktor keamanan. Dari hasil didapatkan dengan seiring menurunnya pH air asam tambang dapat menurunkan kohesivitas tanah timbunan rata-rata pada check dam dengan korelasi 0,994 dan kemaknaan 93,8%. pH air asam tambang menurun diiringi meningkatnya permeabilitas tanah timbunan pada check dam dengan korelasi -0,481 dan kemaknaan 32,0%. Begitu juga pada sudut geser dalam, menurunnya pH air asam tambang disertai dengan peningkatan sudut geser dalam tanah timbunan pada check dam dengan korelasi -0,850 dan kemaknaan 64,7%. Dengan terjadinya perubahan pada kohesivitas, permeabiltas dan sudut geser dalam pada kondisi pH yang berbeda-beda, didapatkan besarnya nilai korelasi faktor keamanan rata-rata sebesar 0,995 dan kemaknaan sebesar 93,5%.
ANALISIS PENGARUH RISK ASESSMENT (PENILAIAN RESIKO) TERHADAP KECELAKAAN TAMBANG PADA KEGIATAN PENAMBANGAN BATUBARA (STUDI KASUS DI PT. BATURONA ADIMULYA) KM Ade Isnaini; zulfkifli Dahlan; syamsul komar
Jurnal Teknik Patra Akademika Vol 8 No 02 (2017): Jurnal Teknik Patra Akademika
Publisher : Politeknik Akamigas Palembang

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PT. Baturona Adimulya refers to PKP2B which is engaged in coal mining. PT. Baturona Adimulya has begun its coal mining activities since 2010. According to the research conducted from 2010 until 2016, there were one mining accident with severe injuries, two adverse events and eleven accidents causing property damages. The frequency level of the mining accident at PT. Baturona adimulya was approximately at level 3(possible) which means mining accidents can occur anytime with the level of incidents probability 26% until 50.99%, and the severity rate was approximately at 2 (minor) which means mining accidents that occur only cause minor injury. Based on the value plotting of the severity and frequency rate at Risk Assessment Matrix, the value of 6 (six) in the green zone was obtained which means the risk is low or minor as it can still be acceptable, additional control is not neceessary, but review on the potential hazard still needs to be done to prevent further risks. Risk Assessment in the form of JSA and SOP have been owned by PT. Baturona adimulya since 2011. There were 79% of 14 mining accidents happened in the period of 2010 until 2016 when JSA and SOP have already existed. The cause accidents persisted was 89.1% human error, 10.9% environment, and management which did not seem to have influence, but in fact it had big influence based on the review of the domino effect theory of heinrich. The efforts which can be done for the prevention of mining accidents are legislation, fixed standards, supervision, researchs which tend to be engineering, medical research, psychological and statistics, education and training, encouragement, insurance, company management commitment
ANALISIS KORELASI SCALED DISTANCE TERHADAP GETARAN TANAH PADA OPERASI PELEDAKAN BATU KAPUR PT. SEMEN BATURAJA (PERSERO) roby cahyadi; Taufik Toha; syamsul komar
Jurnal Teknik Patra Akademika Vol 8 No 02 (2017): Jurnal Teknik Patra Akademika
Publisher : Politeknik Akamigas Palembang

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Abstract

The study was conducted at the limestone mine location of PT. Semen Baturaja (Persero). Limestone mining activity is preceded by a process of destruction using drilling and blasting method. One of the effects on the environment of blasting activities that is the ground vibration. Ground vibration measurement was performed to determine the value of peak particle velocity (PPV) or peak vector sum (PVS). From the data of the ground vibration measurement for one year from May 19, 2016 until June 30, 2016, statistical analysis using linear regression method was carried out. The result of the analysis is the equation formula of correlation between PPV and scaled distance (SD) namely PVS = -0.1187 (SD) + 6.2026 with R2 = 0.7723 stating a strong correlation. Blasting trials were conducted three times, i.e. on June 23, 2016, July 28, 2016 in Block 17-18 B and July 1, 2016 in Block 10A. Experiments were performed to compare between PVS prediction and actual PVS in the field. Based on the three experiments conducted, there were no significant difference between the value of PPV predictions and the actual PPV which was 0.03 to 1.12. The standard used to measure vibration gound refers to ISO 7571: 2010. PT. Semen Baturaja also has standards of ground vibration for blasting that is a maximum of 3 mm / s. Based on relational equation between SD and PVS, vibration control was made by performing a calculation to find the value of PVS = 1 mm / s and PVS = 2 mm / s. Based on the calculation, the value of PVS = 1 mm / s was obtained in SD = 43.83 m / kg0.5, while the PVS = 2 mm / s was obtained in SD = 35.41 m / kg0.5.
Co-Authors KM Ade Isnaini marwan asof roby cahyadi sepriadi sepriadi Taufik Toha zulfkifli Dahlan