Pemetaan Sebaran Kadar Al2O3 dan RSiO2 Pada Endapan Laterit Bauksit Menggunakan Pendekatan Metode Interpolasi Ordinary Kriging Dan Inverse Distance Weighting

Purnomo, Hendro; Wijaya, R. Andy Erwin

doi:10.28989/angkasa.v14i1.1227

Cited by 3 publications

(5 citation statements)

References 11 publications

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“…Berdasarkan hasil analisis statistik dasar yang dilakukan, dimana dapat dilihat dari nilai coefficient of variation lebih besar dari 0,25 yaitu 0,60 yang berarti penyebaran nikel pada lokasi tersebut bersifat heterogen sehingga tidak memungkinkan menggunakan metode NNP (Nearest Neighboard Point). Selanjutnya, nilai yang diperhatikan adalah nilai skewness pada analisa statistik dasar, jika nilainya dibawah 0,5 atau mendekati 0 menunjukan data dianalisa terdistribusi normal maka metode yang cocok digunakan adalah krigging (Rizky & Yulhendra, 2022), jika tidak, maka metode yang digunakan adalah metode IDW (inverse distance weighted) (Wahyuni, Supriyanto, & Djayus, 2019;Purnomo & Wijaya, 2022). Dari data hasil report Software Micromine 2021.5 diatas, dapat dilihat nilai skewness pada zona laterisasi baik bernilai 0,82 yang berarti data yang dianalisa tidak terdistristribusi normal, sehingga metode estimasi yang cocok digunakan pada penelitian ini yaitu metode inverse distance weighted (IDW).…”

Section: Metode Estimasiunclassified

Rancangan Sequence Penambangan Pada Blok A4 Pt. Adhi Kartiko Pratama Desa Lameruru Kecamatan Langgikima Kabupaten Konawe Utara Provinsi Sulawesi Tenggara

Sarfin.L,

Anshari,

Rizky Awaliah N

2024

Locus

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Adhi Kartiko Pratama is a private company which operates in the nickel mining sector and has a Mining Business License covering an area of 1975 Ha. To maintain the company's production, currently PT. AKP plans to open a new mining location in Front Block A, especially in Sub Block A4, with a production target of 100,000 tons per month. This research aims to design a mining sequence based on production targets in Block A4. The design created is an estimated ore distribution. Minable reserves based on the mining pit limit design in Block A4 are 466,383.36 bcm with a total tonnage of 769,532.54 tons with an average Ni content of 1.76%, and including mining recovery parameters of 90%, it is 419,745, 02 bcm and a tonnage of 692,579.29 tons with an average Ni content of 1.74%, then the estimated mine life in Block A4 PT. Adhi Kartiko Pratama will last approximately 6 months. Based on the production target in Block A4, the mining sequence design is divided into 6 stages carried out using a level plan system or following excavation levels, where mining will start from topography with the highest level of 180 meters above sea level to topography with the lowest level of 135 meters above sea level.

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Section: Metode Estimasiunclassified

Rancangan Sequence Penambangan Pada Blok A4 Pt. Adhi Kartiko Pratama Desa Lameruru Kecamatan Langgikima Kabupaten Konawe Utara Provinsi Sulawesi Tenggara

Sarfin.L,

Anshari,

Rizky Awaliah N

2024

Locus

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“…Nilai koefisien skewness menunjukkan 0,3 atau mendekati nol ini mengindikasikan data mendekati bentuk simetris dan nilai rata-rata (mean) mendekati nilai tengah. Data pada Tabel 6 adalah hasil transformasi dari hasil analisis statistik untuk mendapatkan distribusi data yang normal dan dapat diaplikasikan dalam teknik interpolasi Ordinary Kriging (Purnomo dan Wijaya, 2022). Hasil analisis statistik dapat dilihat pada Tabel 6.…”

Section: Analisis Statistikunclassified

Estimasi sumberdaya andesit menggunakan metode ordinary kriging berdasarkan pengukuran geolistrik di PT. Zlaw Group Boyolali, Jawa Tengah

Purnomo,

Prastowo,

Hibullah

et al. 2023

JTMB

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PT. Zlaw Group Boyolali is a company of andesite mining located in Wates Hamlet, Seboto Village, Gladagsari District, Boyolali Regency, Central Java Province. The potential of andesite in the area is encouraging and the absence of supporting data about the distribution and resources of andesite brings PT. Zlaw Group Boyolali to conducting exploration. The objective of this study is to analyze the interpretation of geoelectric measurements of the dipole-dipole configuration and calculate the volume of andesite resources based on geostatistics optimization at the research location and compare the estimation results with previous studies. The research activity was carried out by measuring 2-dimensional geoelectrical resistivity using a dipole-dipole configuration of 12 passes, which covered 100% of the research area. Based on the results of geostatistics optimization, parameters obtained include: nugget 0.224053, sill 0.641390, range 67.749, major/semi-major 1.188, and major/minor 2.073. Soil volume is 1,245,750 m3 with a tonnage of 3,238,950 tons, a weathered andesite volume of 999,656 m3 with a tonnage of 2,599,106 tons, and fresh andesite volume of 1,437,925 m3 with a tonnage of 3,738,605 tons.

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“…The IDW method involves comparing the interpolation results and manipulating the exponent or power used. This method is widely applied in various fields because it is simpler, easy to understand, and can be applied to cases with limited data (Purnomo & Wijaya, 2022). In Ordinary Kriging, the estimation of a variable at a specific point is done by observing similar data in relation to other data points (Rohma, 2022).…”

mentioning

confidence: 99%

“…Spatial interpolation methods such as IDW and OK have been extensively applied in various fields to create spatial distribution maps. (Purnomo & Wijaya, 2022).…”

mentioning

confidence: 99%

“…The estimated value at the target location 𝑍 0 ̂, wi : Sample weight at location I, d i : Distance between location i and target location, k : Power parameter, Zi : Sample value at location i.The value of power is important because it is one of the main factors that affect the accuracy of the interpolation results of Inverse Distance Weighted (IDW)(Purnomo & Wijaya, 2022).…”

mentioning

confidence: 99%

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Estimated Sulfur Dioxide Pollutant Concentrations In Medan City Using Ordinary Kriging and Inverse Distance Weighting Approaches

Fatmawati,

Lubis

2024

Mathline

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Sulfur dioxide (SO2) pollution is a serious problem that negatively affects air quality and human health. So2 is generated by various human activities, especially the combustion of fossil fuels, as well as from natural sources such as volcanic eruptions. The emission of SO2 in urban areas, including Medan, Indonesia, has raised concerns as it is associated with respiratory diseases and the formation of acid rain. This research aimed to estimate comparative SO2 concentrations in Medan City using geostatistical methods, specifically ordinary kriging and inverse distance weighted (IDW). Air quality monitoring data from the Dinas Lingkungan Hidup Kota Medan were collected during a certain period. The collected data were analyzed and then interpolated using ordinary kriging and IDW methods. Furthermore, the Ordinary Kriging method involves testing the OK assumption, calculation of the experimental semivariogram, calculation of the theoretical semivariogram, structural analysis, and calculation of Root Mean Square Error (RMSE). Meanwhile, the Inverse Distance Weighted method involves calculating the Euclidean distance, determining the weights based on the power parameter, calculating the RMSE value, and estimating the SO2 concentration. The comparison results show that the OK method is more accurate in determining SO2 concentration compared to the IDW method in Medan City. In the estimation of sulfur dioxide (SO2) concentration, the OK method used the best theoretical semivariogram model, namely the exponential model, and in the estimation process of the IDW method, the power parameter 1 was used.

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Pemetaan Sebaran Kadar Al2O3 dan RSiO2 Pada Endapan Laterit Bauksit Menggunakan Pendekatan Metode Interpolasi Ordinary Kriging Dan Inverse Distance Weighting

Cited by 3 publications

References 11 publications

Rancangan Sequence Penambangan Pada Blok A4 Pt. Adhi Kartiko Pratama Desa Lameruru Kecamatan Langgikima Kabupaten Konawe Utara Provinsi Sulawesi Tenggara

Rancangan Sequence Penambangan Pada Blok A4 Pt. Adhi Kartiko Pratama Desa Lameruru Kecamatan Langgikima Kabupaten Konawe Utara Provinsi Sulawesi Tenggara

Estimasi sumberdaya andesit menggunakan metode ordinary kriging berdasarkan pengukuran geolistrik di PT. Zlaw Group Boyolali, Jawa Tengah

Estimated Sulfur Dioxide Pollutant Concentrations In Medan City Using Ordinary Kriging and Inverse Distance Weighting Approaches

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