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All Journal TEKNIK Jurnal Geominerba
Dian Agus Widiarso
Departemen Teknik Geologi, Universitas Diponegoro
Earth & Planetary Sciences Education Engineering Other

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PENGARUH LINGKUNGAN PENGENDAPAN TERHADAP KUALITAS DAN PERINGKAT BATUBARA PADA SATUAN BATUPASIR KUARSA FORMASI BALIKPAPAN Boy Syamsu; Dian Agus Widiarso; Reddy Setyawan
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 6 No 2 (2021): Jurnal Geominerba - 2021
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (891.267 KB)

Abstract

Kutai Kartanegara is one of the areas with quite a lot of coal. The presence of the coal needs to be done further research on the coal depositional environment. The purpose of this research is to determine the effect of the depositional environment on coal quality. Methodology of this research form primary data from the results of field mapping and laboratory analysis and added from previous research. Purpose of the research, it is known that the coal depositional environment is upper delta plain, with limnic conditions, the results of the analysis of coal quality are seen from the ash and sulfur content, A3 and A5 coal seams have higher grades than A2 and A4 seams. The quality of coal in the study area is influenced by the conditions of the depositional environment, namely in the form of constituent materials and fluctuating conditions of seawater and geological conditions that develop.
ANALISA KUALITAS DAN SUMBERDAYA BATUBARA LAPANGAN X, PT. BUKIT ASAM (PERSERO) TBK., TANJUNG ENIM, SUMATERA SELATAN Dian Agus Widiarso; Faiq Nirmala
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 7 No 1 (2022): Jurnal Geominerba 2022
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (470.508 KB) | DOI: 10.58522/ppsdm22.v7i1.56

Abstract

Exploration activities are needed to find areas that have coal potential. The research area is an area that has not been mined yet. The purpose of this study is to determine the distribution of the coal in the area of research and analysis resource calculation, rank coal, coal and quality in the research area. The method used is to do the mapping to determine the distribution of coal. coal quality analysis is based on the proximate analysis and calculation of coal resources by using software Minescape 4118. seam A1 has measured resources amounted to 28.6 million tons, designated amounted to 27.8 million tons and 26.1 million tons of inferred. seam A2 has measured resources amounted to 58.2 million tons, designated amounted to 39.6 million tons and 33.5 million tons of inferred. seam B1 has measured resources amounted to 62.5 million tons, designated amounted to 36.2 million tons and 35.8 million tons of inferred. seam B2 has measured resources amounted to 7.89 million tons, designated amounted to 8.63million tons and 9.50 million tons of inferred. seam C has measured resources amounted to 67.8 million tons, designated amounted to 33.1 million tons, and amounted to 37.5 million tonnes inferred. total moisture values obtained tend to be low. Sulfur high value on the seam B1 and C are high influenced by the presence of sea water. The calorific value of the highest in the area of research is on the seam of seam C because C is the oldest seam.
KETIDAKPASTIAN DISTRIBUSI KUALITAS BATUBARA MENGGUNAKAN METODE INTERPOLASI PADA SITE BANKO TENGAH BLOK A, KABUPATEN MUARA ENIM, SUMATERA SELATAN Dian Agus Widiarso; Ulfatunnisa; Nurakhmi Qadaryati
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 7 No 1 (2022): Jurnal Geominerba 2022
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (905.522 KB) | DOI: 10.58522/ppsdm22.v7i1.57

Abstract

Block A of Banko Tengah is a concession exploration area. Along with the increasing demand for electrical energy & the condition of diverse coal qualit,y so a feasibility study is needed for optimizing exploration activity. The research location is Lawang Kidul District, Muara Enim Regency, South Sumatra. Uncertainty studies are related to distribution, seam continuity, and spatial variability pattern, accordingly needed seam reconstruction and coal quality assessment based on drilling data and result of geochemical test analysis. Interpolation methods are kriging, inverse distance to power, and natural neighbor. The quality analysis results show that mine brand of A1 is GAR 4.200 LS, A2 is GAR 4.400 LS, B1 is GAR 4.400 LS, B2 is GAR 4.200 LS, C1 is GAR 4.600 HS, and C2 is GAR 4.400 LS. The statistical assessment was carried out on B1 because of continuity seam, good mine brand, and the most data. The effectiveness of the interpolation method is natural neighbor because the borehole points are pretty close (there is dense data in East-West & rare data in Northeast – East) and the variability of the actual data is quite low.
Penentuan Potensi Sumberdaya Batu Gamping Sebagai Bahan Baku Semen Daerah Gandu Dan Sekitarnya, Kecamatan Bogorejo, Kabupaten Blora, Jawa Tengah Dian Agus Widiarso; Istiqomah Ari Kusuma; Ajiditya Putro Fadhlillah
TEKNIK Vol 38, No 2 (2017)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (802.713 KB) | DOI: 10.14710/teknik.v38i2.13213

Abstract

Kebutuhan pembangunan infrastruktur selalu meningkat seiring dengan pertumbuhan penduduk. Industri konstruksi membutuhkan batugamping yang merupakan bahan pembuatan semen untuk pondasi konstruksi bangunan. Salah satu daerah yang memiliki potensi batu gamping adalah daerah Gandu, Kecamatan Bogorejo, Blora, Jawa Tengah. Penelitian ini bertujuan untuk melakukan eksplorasi potensi batu gamping di daerah Gandu. Pemetaan geologi dilakukan untuk menentukan litologi utama daerah penelitian dan distribusinya. Analisis kualitas batugamping juga dilakukan dalam penelitan ini, dengan  mengkaji komposisi kimia batugamping. Diharapkan hasil penelitian ini dapat digunakan sebagai dasar pemanfaatan batugamping untuk kebutuhan industri semen. Hasil penelitian menunjukkan bahwa stratigrafi regional area penelitian terdiri dari empat satuan batuan, yaitu batulempung karbonan, batugamping, kristalin batupasir kuarsa, dan batugamping. Hasil penelitian juga menunjukkan bahwa batugamping dari daerah Gandu memiliki unsur CaO cukup besar dan unsur Mg sedikit, walaupun di beberapa tempat banyak ditemukan unsur Mg. Perbandingan hasil analisis komposisi kimia dan standar bahan baku semen menunjukkan bahwa kapur di daerah Gandu memenuhi kriteria bahan baku semen
Co-Authors Ajiditya Putro Fadhlillah Boy Syamsu Faiq Nirmala Istiqomah Ari Kusuma Nurakhmi Qadaryati Reddy Setyawan Ulfatunnisa