Journal of Mining Insight

Efektifitas Metode V Shape Loading Dengan Cross Loading Terhadap Produktivitas Whell Loader

La Ode Dzakir — Tue, 30 Jan 2024 00:00:00 +0000

The research was conducted in regency of Taliabu Island, North maluku province on mining problem studied in this research is to calculate the effectiveness of loading tool production using two methods, namely cross loading and V Shape loading. To solve the problem, firstly do the calculation on the productivity of each of the two methods, such as calculation of cycle time, Fill Factor, Sweel Factor and work efficiency of loading tools. The cycle time from V shape loading method is 30.07 seconds and the cross loading method is 37.40 seconds, the fill Factor for shape loading method is 83% while for the cross loading method is 84%, its Sweel Factor is 80% and the work efficiency from theV Shape Loading method is 79%, while the cross loading method is 76%. Based on results, the effectiveness of the production of V Shape loading method is 308,85 tons/hour while the cross loading method is 248,59 tons/huor.

Analisis Perbandingan Kadar Nikel Hasil Pengeboran dengan Hasil Penambangan pada PT Ghanesa Wana Utama

Aldiyansyah, Jamal Rauf Husain — Tue, 30 Jan 2024 00:00:00 +0000

The process of mining nickel resources at PT Gahnesa Wana Utama has problems in the form of differences in nickel content between the drill data and mining results data. Therefore, this study aims to determine the proportion of nickel grade values from drilling to mining results and to determine the factors that cause changes in nickel content values from drilling and mining results. The research method is carried out by analyzing the results of drill data with mining results. The results of the study showed that the drilling results obtained an average grade value of 1.64%, while mining results obtained an average grade value of 1.42%. This study shows that there has been a comparison of the difference in Ni content based on the results of drilling and mining results, namely 0.22%. The causative factors of changes in nickel levels are stagnant water in the stockpile, use of used sacks for samples, dredging of stockpile floors that are less clean, operators who are less attractive in ore collection, sampling errors and preparation errors.

Desain Jalan Tambang PT. Vale Indonesia Tbk Sorowako

Habibie Anwar, Alam Budiman Thamsi — Tue, 30 Jan 2024 00:00:00 +0000

The main function of the mine road is to support the smooth of mining operation, especially in transportation activities, so the good mine road is necessary to design to improve hauling productivity. This research aimed to determine the ideal road geometry for the transportation activities. The data used in this research are topography map, transportation equipment specification data, SOP (standard operational procedure) of road design, and road geometry data. Data processing is conducted to make the calculation of road geometry using rational formula, then based on the result of the calculation, the design of mining road is made. The results of the research showed that the minimum road widths for the straight road are 22 m and for the bend are 28 m, then have the grade of 10% or 3.6°, have the cross slope with height of 3%, and for the bend with width 28 m. The good superelevation used is 6% m. In conclusion, the geometry of mine road at PT. Vale Indonesia, Tbk has been the ideal for fulfilling the hauling activities.

Bentuk Desain dan Pemilihan Jenis Tanaman Lahan Pasca Tambang Nikel di Desa Tangofa Provinsi Sulawesi Tengah

Reski Sandi, Aqsal Ramadhan Shaddad — Tue, 30 Jan 2024 00:00:00 +0000

Environmental changes due to mining business are generally irregular, and most tend to be a steep relief. The objective of this research is to produce the reclamation design and to determine the right type of vegetation for planting in the former nickel mining area. This study employs qualitative research method which consist of field survey data collection, precipitation data, and size of the reclamation design as well as the history of the company being analyzed. Referring to the results of this study, the design of reclamation is vital in mine planning based on the principles as stipulated in the goverment regulation of the republic of indonesia no. 78 the year 2010. In relationt to the planned closure of the post-mining land. It is necessary to design the land after the mining activities expire considering that the land would be utilized by its allocation. Making a reclamation design used the bench method, by forming terraces since the relief was quite steep. Based on the calculation of geotechnical science by the company, the results of the slope was quite optimal with a value of SF ± 1,5 in the 3D design as reference drawings for reclamation design. Plants suitable for early revegetation is sengon, it is based on the analysis performed on 2 (two) soil chemical properties located in blok X for micro nutrient parameters. The soil pH at this location was categorized as a weak acid, and the nutrient content at the research site was classified high since it possessed higher than the averagae value based on laboratory results.

Analisis Pemantauan Lingkungan Hidup Pada Tahap Operasional Penambangan Nikel di Provinsi Sulawesi Tenggara

Dian Dwi Apriliyani Arsdin, Harwan Harwan — Tue, 30 Jan 2024 00:00:00 +0000

In general, coal mining in indonesia uses the open pit mining method, one of the critical success of this mining method is the stripping of over burden which is above the coal seam itself. Thus the purpose of this research is to calculate and analyze the progress of mining on the activities of over burden stripping. In this study measurement is done through cress, toe, and spot on coal mining using total station, from the measurement results are processed and then compared the volume of the stripped over burden by using surpac and prismoidal. The volume result of the mined over burden by surpac during the first week is 10,643 m3, second week 54,556 m3, and on the third week 63,596 m3, while the calculation result by prismoidal during the first week is 11,66 m3, second week 53,99 m3, and on the third week 64,64 m3. So from the comparison mining volume of stripping over burden between surpac and prismoidal on the first week 1.02, second week 0.56, and third week 1.05. Based on the comparison it is concluded that the surpac and prismoidal have calculation results tend to be similar in comparison.