Improvement of methodical framework for autonomous scheduling of mining operations during underground mine design and planning

Author(s):  
D.A. Stadnik ◽  
O.Z. Gabaraev ◽  
N M Stadnik ◽  
A M Tedeev
2019 ◽  
Vol 123 ◽  
pp. 01043 ◽  
Author(s):  
Nataliia Shvaher ◽  
Tetiana Komisarenko ◽  
Serhii Chukharev ◽  
Svitlana Panova

The article aims at determining possible annual production considering mining and technical capabilities of the underground mine. Deepening of mining operations at Kryvyi Rih iron ore basin reduces considerably annual production of the useful mineral which results in increased mining costs. To maintain annual production, it is reasonable to build the second stage of opening the depth of which depends on production volumes. When determining the optimal depth of the first stage opening, it is necessary to apply a complex research method including the graphoanalytical one for determining the underground mine’s annual production and the industrial one for adjusting the methods considering technical conditions of the enterprise. It has been determined that annual production is influenced not only by mining and geological but also by mining and technical conditions. It has been proved that annual production of an underground mine decreases in direct proportion to the increased depth of mining. The speed of skips in the shaft is greatly impacted by the length of the main opening and its operating life. With the increase of the shaft operating life the skip speed decreases from 12 to 6 – 8 m/s. When designing the flowchart of further opening of underlying levels, it is necessary to consider both mining capabilities and technical conditions of the shaft and headgear, mining depth and the main opening operating life as well as the strategy of the mining enterprise. Consideration of the above mentioned factors enables maintaining the required annual production when mining iron ores at great depths. Under conditions of Kryvyi Rih iron ore basin, it has been determined reasonable to apply the main vertical shaft flowchart when mining reserves to the depth of 1650 m.


2020 ◽  
pp. 1-14
Author(s):  
Peter Nesbitt ◽  
Levente Sipeki ◽  
Tulay Flamand ◽  
Alexandra M. Newman
Keyword(s):  

2021 ◽  
pp. 59-83
Author(s):  
Xu Ma ◽  
Ping Zhang

Geological structures and discontinuities subjected to the perturbations posed by mining operations in underground mining can be re-activated and cause fault-slip rockbursts. This study investigates geomechanical stability in terms of shear slip behavior along discontinuities using 3DEC with focusing on sudden changes of shear stress and shear displacement. A direct shear test is performed using a continuously yielding joint model to examine the evolution of shear stress and shear displacement on this joint. Further, this continuously yielding joint model is applied in major discontinuities of an underground mine to examine whether an unstable shear slip behavior exists, which is represented by a significant shear stress decrease and a shear displacement increase. By referring to geological mapping of this mine, four cases are developed and each case is set up with one type of major discontinuities with identically simulated mining operations. Results imply that the amplitude of shear stress decrease and shear displacement increase along discontinuities substantially increases with the depth due to higher virgin stresses and mining-induced stresses at greater depths. The discontinuity parallel to the interface between footwall and orebody is the least safe case and subjects to the largest potential of triggering seismic events. Keywords: Shear slip behavior, Unstable failure, Mining-induced seismicity, Continuously yielding joint model, DEM.


2019 ◽  
Vol 1 (1) ◽  
pp. 35-46
Author(s):  
Jimmy Bob Suroto ◽  
Ramdhan Rabbani ◽  
Anas Abdul Latif ◽  
Presentia Biserva Aesh

The development of the Toguraci Underground Mine was begun in 2011 with the ore production started in 2012. The amount of water continued to increase in the Underground Mine at the beginning of 2014 which became problem that effected the activities of mining. The increase of hot water Toguraci underground mining effected to the safety for workers who are exposed to hot water, ventilation problems and equipment that are submerged in hot water. Tuguraci mine has two dewatering systems, namely dewatering systems on the surface and dewatering systems in underground mines. The handling of surface water comes from pumping underground to surface where water discharge is around 400 L / s with the temperatures ranging from 70°C while water treatment in underground mines includes decreasing water heading levels and pumping water from underground mines to the surface. The increase water entering heading development and stoping can be overcome by changing the surface dewatering system by using water cooling, while underground mining is done by changing the pipeline from the polypipe to the steel pipe and to reduce water entering the mining front is doned by drill holes for installing submersible pumps and replacing Oddesse pump to the Schlumberger pump which is more resistant to high temperature hot water, as long as mining operations take place 48 borehole drilling has been done with 11 borehole flowrate below 5 l / s and 37 borehole with flow rate above 5 l / s, and a water drop of around 77 meters


2020 ◽  
Vol 1 (1) ◽  
pp. 181-190
Author(s):  
Jhony Jhony ◽  
Wildan Firdaus

ABSTRAK Pertambangan batubara di Indonesia telah mengalami pasang surut harga yang sangat fluktuatif sejak 2012. Hal tersebut berdampak langsung kepada para pelaku usaha pertambangan batubara. Oleh karena itu, efisiensi dalam proses pertambangan harus ditingkatkan termasuk dalam sisi perencanaan. Perencanaan yang baik dan akurat dapat memberikan banyak manfaat yaitu, peningkatan kualitas eksekusi dengan nilai stripping ratio yang optimum, tambang terbentuk rapi sehingga keselamatan kerja meningkat karena lereng terbentuk sesuai dengan desain serta meningkatkan utilisasi dan produktifitas alat. PT Pamapersada Nusantara merupakan salah satu kontraktor pertambangan batubara di Indonesia yang telah melakukan pengukuran akurasi perencanaan tambang sejak 2017 yang dikenal dengan nama MDA (Mine Design Accuracy). Nilai rata-rata MDA untuk proyek-proyek penambangan yang dikerjakan PAMA sejak 2017 hingga 2018 masih berkisar 91%, artinya masih ada 9% dari operasional yang diluar perencanaan baik yang berupa overcut maupun yang undercut dari desain awal. Untuk meningkatkan nilai MDA tersebut, dilakukan terobosan sistem monitoring operasional dengan bantuan drone. Bahkan drone tidak hanya dimanfaatkan untuk monitoring secara visual melalui video saja, tetapi juga digunakan sebagai alat ukur akurasi desain dalam bentuk orthophoto yang di-overlay-kan dengan desain dan cross section dari situasi hasil pemetaan menggunakan drone. Hasil video dari drone dilihat oleh pengawas tambang setiap hari dari sudut pandang yang lebih luas (helicopter view) dengan tujuan pengawas akan lebih jelas dalam menemukan deviasi dan dapat segera melakukan tindakan perbaikan. Hasil orthophoto yang di-overlay-kan dengan desain, dievaluasi secara mingguan oleh mine engineer untuk melihat posisi dan kelurusan tambang yang sedang dikerjakan apakah telah sesuai dengan desain perencanaan. Dan juga sebagai mitigasi terhadap potential problem yang akan muncul karena orthophoto dapat memberikan citra yang lebih jelas (real) dibandingkan hanya melihat kontur tambang. Sedangkan untuk cross section dari hasil situasi drone juga dapat dilakukan secara mingguan agar mine engineer dapat dengan cepat menginformasikan kepada pengawas di lapangan area mana saja yang sudah mendekati desain dan area mana yang masih harus digali. Setelah metode monitoring dan pengukuran menggunakan drone, nilai Mine Desain Accuracy meningkat menjadi 95% di semester 1 tahun 2019. Hal ini berarti pemanfaatan teknologi drone dapat membuat operasional pertambangan yang lebih efektif karena baik pengawas maupun mine engineer sama-sama dapat melihat situasi tambang dengan lebih luas dalam kondisi real. Selain efektif, drone juga dapat meningkatkan efisiensi kerja karena waktu yang dibutuhkan untuk pengambilan situasi lapangan yang berupa video hingga berbentuk data situasi sangat singkat dibandingkan dengan pengambilan data dengan metode lainnya. Kata Kunci: Mine Desain Accuracy, Drone, Stripping Ratio, Orthophoto, Cross Section  ABSTRACT Coal mining in Indonesia has experienced ups and downs in prices that have fluctuated greatly since 2012. This has had a direct impact on coal mining businesses. Therefore, efficiency in the mining process must be increased including in the planning side. Good and accurate planning can provide many benefits, improving the quality of execution with an optimum stripping ratio, the mine is neatly formed so the safety is increased because the slope is formed in accordance with the design and increases the utilization and productivity of production unit. PT Pamapersada Nusantara is a coal mining contractor in Indonesia who has measured accuracy in mine planning since 2017, known as MDA (Mine Design Accuracy). The average MDA for mining projects undertaken by PAMA from 2017 to 2018 is still around 91%, meaning that there are still 9% of operations that are out of planning both in the form of overcuts and undercuts from the initial design. To increase the MDA value, a breakthrough in the operational monitoring system was carried out with the help of drones. Drones are not only used for visual monitoring via video, but are also used as a measurement of design accuracy in the form of orthophoto that is overlaid with the design and cross section of the situation using the drone mapping results. The video results of the drone are seen by the mine supervisor every day from a broader perspective (helicopter view) with the aim of the supervisor being more clear in finding deviations and can immediately take corrective action. The orthophoto results that are overlaid with the design, are evaluated weekly by the mine engineer to see the position and alignment of the mine being worked on whether it is in accordance with the design plan. And also as a mitigation of potential problems that will arise because orthophoto can provide a clearer image (real) than just seeing the contours of the mine. Cross section of the drone situation results can also be done every week so that the mine engineer can quickly inform the field supervisor which areas are close to the design and which areas still need to be excavated. After monitoring and measuring methods using drones, Mine Design Accuracy increased to 95% in semester 1 of 2019. This means that the use of drone technology can make mining operations more effective because both supervisors and mine engineers can see the mine situation more extensive in real conditions. Aside from being effective, drones can also improve work efficiency because the time needed to capture field situations in the form of video to form data is very short compared to data retrieval by other methods. Kata Kunci: Mine Desain Accuracy, Drone, Stripping Ratio, Orthophoto, Cross Section


1986 ◽  
Vol 4 (4) ◽  
pp. 319-329
Author(s):  
P. K. Chatterjee ◽  
D. E. Scheck ◽  
S. Chaluvadi ◽  
S. Holguin

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