Coal Layer Identification using Electrical Resistivity Imaging Method in Sinjai Area South Sulawesi

Samanlangi, Andi Ilham

doi:10.1088/1742-6596/979/1/012048

Cited by 3 publications

(5 citation statements)

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“…Resistivity imaging indicates that, when compared to relevant studies concerning coal resistivity values, coal resistivity ranges from 100 Ωm to 800 Ωm [12,[44][45][46]. Therefore, the coal resistivity used in this study ranges from 95 Ωm to 800 Ωm, which is sufficiently comparable to other references.…”

Section: Results Of Ert Profile-02 (Mastikhel Tirah)mentioning

confidence: 55%

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Integrated Geophysical and Geochemical Analyses for Assessment of Potential Coal Prospects in Tirah Area, Khyber Pakhtunkhwa, Pakistan

Sajid,

Ali,

Khan

et al. 2023

Energies

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This study presents a comprehensive investigation of the Paleocene coal in the Tirah area, District Khyber, Khyber Pakhtunkhwa, Pakistan, utilizing onsite Electrical Resistivity Tomography (ERT) and Ground Penetrating Radar (GPR) experiments combined with geochemical analyses of obtained coal-rock samples. ERT and GPR profiles, along with geochemical data, were collected and meticulously analyzed to assess the potential and quality of coal seams based on coal ranking, aiming to delineate their spatial distribution and future exploitation prospects. The study reveals a wide range of resistivity values, spanning from 8.93 Ωm to 2472 Ωm. The uppermost layer, comprising silt and clay with water saturation, exhibits resistivity values ranging from 8.93 Ωm to 50 Ωm. The subsequent stratum, characterized by wet sandstone with minor shale and clay, has resistivity values between 50 Ωm and 95.3 Ωm. Significantly, the zone with resistivity values between 95.3 Ωm and 800 Ωm is identified as the probable host of the coal seams. Based on the results, the coal seams are estimated to exist at depths ranging from 14 to 23 m, with resistivity values between 95.3 Ωm and 800 Ωm. GPR results further corroborate these findings, revealing coal-bearing strata at various depths, thus confirming the ERT results. Additionally, proximate and ultimate analysis provided insights into the quality of the coal, with average concentration values of moisture content (6.95%), ash content (22.12%), volatile matter (28.55%), fixed carbon (42.40%), carbon content (55.35%), hydrogen (4.7%), nitrogen (0.95%), sulfur (4.82%), and oxygen (10.06%). Comparative analyses of the obtained results with local coals from the Salt Range in Punjab, Pakistan, and coal from Ogboyaga, Nigeria, confirm that the studied coal ranks as sub-bituminous. This comprehensive assessment offers valuable insights into the potential and quality of Paleocene coal in the studied region and is applicable to other areas with similar geological settings.

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Section: Results Of Ert Profile-02 (Mastikhel Tirah)mentioning

confidence: 55%

“…Electrical resistivity imaging (ERI) has been proven to be a reliable and helpful method in coal exploration and, afterwards, the exploitation of coal deposits [42][43][44]. From the published data, it is concluded that the coal seams have a resistivity value ranging from 100 Ωm to 800 Ωm [45][46][47].…”

Section: Geophysical Investigationmentioning

confidence: 99%

Integrated Geophysical and Geochemical Analyses for Assessment of Potential Coal Prospects in Tirah Area, Khyber Pakhtunkhwa, Pakistan

Sajid,

Ali,

Khan

et al. 2023

Energies

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“…Metode yang paling umum digunakan untuk eksplorasi awal batubara adalah metode tahanan jenis yang mempunyai beragam konfigurasi yang dapat dipilih sesuai dengan kebutuhan dan kedalaman [7]. Metode ini mampu memberikan gambaran tentang sebaran dan ketebalan lapisan batubara di bawah permukaan dengan memanfaatkan proses inversi nilai resistivitas batuan yang terukur [8].…”

Section: Kata Kunci: Batubara Tahanan Jenis Inversiunclassified

Identifikasi Sebaran Batubara Metode Tahanan Jenis Pada Formasi Muara Enim: Studi Kasus Daerah “X” Provinsi Jambi

Juventa

Prabawa²

2023

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Batubara adalah batuan sedimen non-klastik yang terbentuk secara organik berasal dari akumulasi pengendapan sisa tumbuhan jutaan tahun lalu dan mengalami pengayaan kimia dan fisika pada kandungan atom karbonnya. Sifat batubara sebagai batuan sedimen berbeda dengan batuan sedimen klastik. Bila batuan sedimen klastik pada umumnya memiliki ukuran butir dan porositas yang bisa berfungsi sebagai penyimpan fluida, maka batubara tidak memiliki porositas. Keberadaan fluida air pada porositas batuan sedimen akan mengakibatkan nilai tahanan jenis pada batuan sedimen klastik relatif lebih rendah dibanding batubara karena air akan berperan sebagai pengantar perpindahan arus listrik. Nilai tahanan jenis pada batubara relatif lebih tinggi dibanding batuan sedimen sekitarnya. Penelitian ini bertujuan untuk mengetahui sebaran batubara yang bersifat spotting dengan menggunakan metode geolistrik tahanan jenis. Nilai tahanan jenis pada batubara relatif lebih tinggi dibanding batuan sedimen sekitarnya. Penelitian ini diawali dengan melakukan pemetaan geologi untuk mencari singkapan batubara dan kemudian dirancang pengambilan data geolistrik dengan Konfigurasi Wenner sebanyak 4 lintasan, 2 lintasan sepanjang 240 meter dengan jarak antara elektroda sebesar 10 meter dan 2 lintasan lagi sepanjang 160 meter dengan jarak antar elektroda 7,5 meter. Nilai tahanan jenis yang didapat kemudian akan diinversikan menjadi penampang 2 dimensi. Penampang 2 dimensi ini kemudian akan diinterpolasikan nilainya sehingga mendapat model 3 dimensi. Hasil yang didapatkan, arah umum dari strike batubara adalah N 1400 E dengan nilai dip batuan sebesar 330 dan nilai tahanan jenis batubara pada daerah penelitian sebesar 100-300 Ωm. Model 3 dimensi memperlihatkan bahwa batubara pada lokasi penelitian bersifat spotting dan tidak mengikuti arah lamparan batuan secara umum, namun masih mengikuti arah dip batuannya.

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“…The literature published in the past revealed that various researchers used the ERT technique very effectively to delineate sinkholes, potholes, old abandoned goaves, cavities, voids, underground galleries/workings and so on (Abu‐Shariah, 2009; Das & Mohanty, 2016; Das et al., 2017; Ortega et al., 2010; Van Schoor, 2002; Zhou et al., 2004; Bharti, Pal, Priam, Kumar, et al., 2016; Bharti, Pal, Priam, Pathak, et al., 2016; Bharti et al., 2016c; Arjwech et al., 2021; Barbosa et al., 2020; Bharti et al. 2021; Bhattacharya & Shalivahan, 2016; Fargier et al., 2017; Nthaba et al., 2020; Prakash & Bharti, 2022; Prakash et al., 2022; Prosdocimi et al., 2019; Samanlangi, 2018; Bharti, Singh, et al., 2022; Bharti, Prakash, et al., 2022). A recent study by Saurabh et al.…”

Section: Introductionmentioning

confidence: 99%

“…ERT is a versatile tool for mapping of subsurface features like voids, cavities, underground galleries/tunnels (air‐or water‐filled) and so on, where high contrast in resistivity is leveraged to delineate the features very easily. In ERT study, high‐resolution information on subsurface resistivity variation depends on the data quality, data density, choices of electrode configuration and electrode spacing (Aizebeokhai, 2010; Barbosa et al., 2020; Bharti, Pal, Saurabh, Kumar, et al., 2019; Bharti, Pal, Saurabh, Singh, et al., 2019; Cardarelli et al., 2010, 2014; Chandra et al., 2008; Fargier et al., 2017; Giao et al., 2003; Horo et al., 2020; Kumar, 2012; Kumar et al., 2021; Leucci, 2006; Loke, 2000; Nthaba et al., 2020; Prosdocimi et al., 2019; Samanlangi, 2018; Singh, 2013; Singh et al., 2004; Ward, 1989).…”

Section: Introductionmentioning

confidence: 99%

Electrical resistivity tomography technique coupled with numerical modelling: A case study for stability analysis

Bharti

Singh

Pal

et al. 2023

Geophysical Prospecting

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Cavity due to underground old mine workings is one of the major threats to the coal mines and the overlying subsurface and surface properties, which need to be protected. The detection of old mine workings and stability assessment of overlying strata are common problems in most of the Indian coalfields. Several coal mines in India are loss‐making, mainly due to different types of mine hazards. Khandra mine is one such mine at Raniganj Coalfield, Eastern Coalfields Ltd., a subsidiary of Coal India Limited. In the present study, 2‐dimensional and 3‐dimensional electrical resistivity tomography were carried out for detailed subsurface characterization. It supports delineating underground workings, including the nature of voids/cavities (air or water‐filled). Excessive distortions were reported in electrical resistivity tomography application, especially at the near‐surface, owing to large resistivity variations. Refinement of the model by half‐unit electrode spacing was attempted here to reduce the distortions with minimum possible absolute errors. 3‐Dimensional resistivity volumetric model was also developed with the help of five electrical resistivity tomography parallel profiles for better apprehension of the subsurface. Analysis provided important inputs for stability analysis using 3‐dimensional numerical modelling. The physico‐mechanical properties of the overlying strata, pre‐excavation in situ stresses, boundary conditions and the mine geometry simulation were incorporated for understanding the stability analysis. Stability analysis was carried out using the finite difference technique. The analysis of 3‐dimensional numerical modelling indicated that two distinct layers comprising (i) laterite/part of the course to medium‐grained sandstone and (ii) developed galleries of R‐IX seam exhibited a very low safety factor below 1.0, indicating potholing/subsidence susceptibility. The other three layers comprising parts of fine‐grained sandstone exhibited a relatively higher safety factor of around 2.0, indicating moderately stable zones, but not on a long‐term basis. Parts of Siduli stream embankments need suitable retaining walls to avoid water inundation for the stability of the area.

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Coal Layer Identification using Electrical Resistivity Imaging Method in Sinjai Area South Sulawesi

Cited by 3 publications

References 1 publication

Integrated Geophysical and Geochemical Analyses for Assessment of Potential Coal Prospects in Tirah Area, Khyber Pakhtunkhwa, Pakistan

Integrated Geophysical and Geochemical Analyses for Assessment of Potential Coal Prospects in Tirah Area, Khyber Pakhtunkhwa, Pakistan

Identifikasi Sebaran Batubara Metode Tahanan Jenis Pada Formasi Muara Enim: Studi Kasus Daerah “X” Provinsi Jambi

Electrical resistivity tomography technique coupled with numerical modelling: A case study for stability analysis

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