scholarly journals Tin mining process and its effects on soils in Bangka Belitung Islands Province, Indonesia

2020 ◽  
Vol 17 (2) ◽  
pp. 180
Author(s):  
Sukarman Sukarman ◽  
Rachmat Abdul Gani ◽  
Asmarhansyah Asmarhansyah
Keyword(s):  
Hydrological Cycle ◽  
Forest Products ◽  
Coarse Grained ◽  
Open Pit ◽  
Open Pit Mining ◽  
Land Resources ◽  
Mining System ◽  
Structure Changes ◽  
Primary Element ◽  
Mixed Soils

Tin mining in the Bangka Belitung Islands Province is conducted with an open-pit mining system. This paper discusses the process of tin mining and its effects on soil properties in this region. Tin mining led to the formation of accumulations in the form of (1) mixed soils from horizons A, B, and C, (2) excavated materials from the deeper levels of the pit, (3) coarse-grained tailings with quartz as a primary element, (4) tailings mixed with excavated soils, and (5) voids filled with water. After tin mining ended, the area was left with waste excavated materials, stockpiles of excavated materials or tailings, and voids, spread over an area of 124,838 ha. Overall, mining has led to significant and alarming damages to the biophysical aspects of land resources and the environment. This damage includes the deterioration of soil structure, changes in soil texture, loss of soil organic matter, and loss of soil fertility. The mining activities also caused the loss of a number of types of biota that are important to provide environmental services such as the provision of forest products, soil stability, maintaining the hydrological cycle, and carbon sequestration.

scholarly journals Designing Open Channel Dimension for Imkasu Area West Papua

2021 ◽  
Vol 2117 (1) ◽  
pp. 012039
Author(s):  
A S Sari ◽  
Y D G Cahyono ◽  
N N A Johnson ◽  
D Simorangkir ◽  
F A Redanto ◽  
...  
Keyword(s):  
Open Channel ◽  
Channel Length ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining System ◽  
Run Off ◽  
West Papua ◽  
Presidential Decree ◽  
Technical Study ◽  
Natural Channel

Abstract Gag Nikel Ltd belongs to a Contract of Work located in Gag Island, West Waigeo Islands District, Raja Ampat Regency, West Papua Province. The open pit mining system employed at this company will enter the mining location and therefore, requires a design of open channel for diversing water coming from rainfall, run off, and ground. The rainfall intensity calculated by Mononobe formula obtained 5,994 mm / hour, whereas the catchment area got 0.59 km 2. The total discharge of run off calculated by Rational Formula gained 1867,956 m 3 / hour. Meanwhile, the design of open channel calculated by Manning Formula yielded wet section (A) = 0.668 m 2, base width (b) = 0.714 m, and depth (h) = 0.714 m, surface width (B) = 1.542 m. Box control having the volume 1 m3, length = 1 m, width = 1 m, and height 1 m must be made every 1 kilometer of open channel length. Around the area of open channel, the used tire must be given to reduce the erosion rate flowing into settling pond. All of these are necessary because the open channel is located near the natural channel and we must also consider several regulations such as Presidential Decree and IPPKH adjusted to the technical study that has been designed.

ASSESSMENT OF THE GEOMECHANICAL CONDITION OF THE KALMAKYR COPPER-PORPHYRY ORE DEPOSIT MINING SYSTEM

2021 ◽  
Vol 3 ◽  
pp. 1212-127
Author(s):  
E.N. ESINA ◽  
◽  
A.E. KIRKOV ◽  
A.I. DOSKALOV ◽  
◽  
...  
Keyword(s):  
System Analysis ◽  
Porphyry Copper ◽  
Three Dimensional ◽  
Open Pit ◽  
Open Pit Mining ◽  
Three Dimensional Model ◽  
Mining System ◽  
Ore Deposit ◽  
Copper Porphyry ◽  
Geological Conditions

The Almalyk deposit of porphyry copper ores (Kalmakyr quarry) here is the subject for exploration of the open-pit mining parameters. A three-dimensional model of the quarry is developed by the modern geoinformation modeling method basing on system analysis of mining and geological conditions and technical mining parameters of the Almalyk copper-porphyry ore deposit open-pit. Main factors influencing the deformation processes development in the rock mass are identified. The probable zones of deformations of the Kalmakyr quarry sides with an increase in its depth are determined. It is recommended to organize and carry out continuous comprehensive geomechanical monitoring to ensure the safe further exploration at the quarry. This measures allow to quickly determine the signs preceding the occurrence of emergency situations, take preventive steps to stabilize the geomechanical condition of considered mining system.

scholarly journals Mitigation in erosion control and management of ex-mining water through revegetation and sustainable environmental management technologies

2021 ◽  
Vol 882 (1) ◽  
pp. 012043
Author(s):  
E Istiqomah ◽  
R Aryanto ◽  
T T Purwiyono
Keyword(s):  
Drainage System ◽  
Deposition Process ◽  
Open Pit ◽  
Open Pit Mining ◽  
Water Drainage ◽  
Swamp Forest ◽  
Mining System ◽  
The North ◽  
The Government ◽  
Control Erosion

Abstract In the open-pit mining system that is being carried out by a company in the mining sector with gold and silver commodities, PT Citra Palu Minerals, land clearing can cause soil erosion which can lead to soil sedimentation, increased turbidity of water that will be released into the environment and potential entry soil eroded into the tailings pond at the Dry Tailing Management Facility (DTMF). Therefore, further action is needed to control erosion and sedimentation as well as water management so that the water to be released into the environment is following environmental quality standards that have been set by the government. Before determining and controlling erosion, it is necessary to know the rate of erosion that occurs at the research location, in this study the USLE (Universal Soil Loss Equation) method was used to predict the rate of erosion with the results obtained, namely 17.07 tonnes/ha on the North DTMF slopes and 21.04 tonnes/ha for DTMF South slopes. To reduce the rate of erosion, it is necessary to control erosion by revegetation of the land, create a water drainage system to the sedimentation pond and treat the collected water using biophytoremediation of land with the use of chemicals to accelerate the deposition process, constructed swamp forest to the latest sustainable technology recommended by the Indonesian Academy of Sciences (LIPI).

scholarly journals Slope Stability Analysis Based on Safety Factors on Slope CV. Mutiara Timur in Klampok Village, Tongas District, Probolinggo Regency

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Yazid Fanani ◽  
Aprilia Dwi Astuti ◽  
Andres Kevi Paki
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Safety Factor ◽  
Slope Stability Analysis ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining System ◽  
A Company ◽  
Rock Lithology ◽  
Safe Working

CV. Mutiara Timur is a company that is applying for a mining business permit for sirtu commodities in Klampok Village, Tongas District, Probolinggo Regency. The planned mining system is open pit mining using the quarry method. From the results of research in the field obtained rock lithology in the form of topsoil, gravel and sand. Where in the slope design later, the topsoil will be peeled off first. The purpose of slope stability analysis is to determine the geometry of the slope by taking into account the safety factor in order to create safe working conditions. Slope stability analysis on CV. Mutiara Timur using the Bishop method using the Slide v6.0 software. Based on the analysis carried out, the recommendation for slope geometry on a single slope is 4 meters high with a slope of 600 so that the no-load safety factor is 1.350 and the safety factor with load is 1.267. In addition, the slope geometry is obtained on the overall slope, which is a total height of 21 meters with a slope of 380 so that the no-load safety factor is 1.243 and the safety factor with the load is 1.239.

scholarly journals Technical Study Of Mine Dewatering System In Coal Mining

PROMINE ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 28-33
Author(s):  
A.A Inung Arie Adnyano ◽  
Muhammad Bagaskoro
Keyword(s):  
Coal Mining ◽  
Water Discharge ◽  
Mining Area ◽  
Open Pit ◽  
Open Pit Mining ◽  
Water Control ◽  
Mining System ◽  
Control Effort ◽  
Mine Dewatering ◽  
Daily Discharge

Coal mining by PT. Tambang Bukit Tambi uses an open pit mining system where one of the factors that can affect mining is water that entering the mining area, so water control must be carried out, one of the ways is by using mine dewatering system. The purpose of this study is 1) To know the debit of water entering the mining area. 2) To design a pumping plan 3) To create an ideal sump design for handling water that entering the mining area. Based on the research, the daily discharge is 32,243.36 m3 / day where the water discharge that can be released by 2  Kenflo XA 125 / 40B pumps is 640 m3 / hour in 50.38 hours and the water control effort is made a sump that must accommodate water amounting to 19,427.26 m3 and after the calculation is obtained a trapezoid-shaped sump design with size length and surface width of 63.7 m, length and width of the base of the sum of 60.9 m and depth of 5 meters.

scholarly journals SAFETY IN SUBSTOPING-AND-CAVING IN TECTONICALLY STRESSED ROCK MASSES

2021 ◽  
Vol 2 (3) ◽  
pp. 311-321
Author(s):  
Sergey A. Neverov ◽  
Anton I. Konurin ◽  
Yuri N. Shaposhnik
Keyword(s):  
Mathematical Modeling ◽  
Underground Mining ◽  
Open Pit ◽  
Open Pit Mining ◽  
Variable Degree ◽  
Structural Elements ◽  
Mining System ◽  
Sublevel Caving ◽  
Mine Workings ◽  
The Stability

Mining of a thick steeply dipping deposit using sublevel caving with end-face ore drawing in transition from open pit excavation to underground mining is considered in conditions of developed tectonics. The technology was justifed by mathematical modeling of the stress state of the rock mass using finite element method. Safe parameters of the mining system were determined by solving a variational problem with a variable degree of geomedium disturbance in the existing mining and engineering structure when depleting reserves at an advanced stoping stage. The predicted areas of stability losses for main structural elements of the mining system have been determined. Safe parameters of ore breaking and drawing were calculated using the stability condition of mine workings. Recommendations are given for the excavation of thick steeply dipping deposits under open pit mining.

Technological parameters and operation arrangement of stripping machines in chernogorksy open pit mine

2018 ◽  
pp. 22-35
Author(s):  
V. V. Agafonov ◽  
G. N. Shapovalenko ◽  
S. N. Radionov ◽  
V. Yu. Zalyadnov ◽  
N. S. Bikteeva
Keyword(s):  
Production Efficiency ◽  
Open Pit Mine ◽  
Open Pit ◽  
Open Pit Mining ◽  
Technological Parameters ◽  
Mining System ◽  
Geological Conditions ◽  
Production Output ◽  
The Cost ◽  
Stripping Efficiency

Many coal mines in Russia tend toward increasing their production output. Chernogorsky open pit mine, having expanded output by more than 30% for the last five years, is not exclusion. As output is increased whereas geological conditions complicate, technological parameters and production efficiency change. For example, in the open pit, percentage of overburden removal with direct dumping has greatly shrunk as against the truck-and-shovel system. In the meanwhile, the cost of stripping with the tuck-and-shovel system is much higher than in direct dumping by walking excavators. This article gives an analysis of technological parameters, open pit mining system parameters and stripping arrangement at the mine. The authors examine costs of stripping machinery maintenance and compare specific capacities of equipment in use. The modeling results on further increase in productivity of the open pit mine and in capacity of walking excavators are presented with the calculated optimized height of bench for stripping with direct dumping. The reserves available to increase stripping efficiency lie, in the authors’ opinion, in the system of resource allocation for equipment operability maintenance and personnel motivation.

scholarly journals The Influence of Structural Structures on Slope Stability at PT. Energi Batubara Lestari, South Kalimantan)

PROMINE ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 34-40
Author(s):  
Yudho Dwi Galih C ◽  
Gati Sri Utami ◽  
Arrina Khanifa
Keyword(s):  
Slope Stability ◽  
Geological Structure ◽  
Open Pit ◽  
Open Pit Mining ◽  
Strong Impact ◽  
Loose Sand ◽  
Mining System ◽  
Weathered Rocks ◽  
Boundary Equilibrium ◽  
Highwall Slope

PT. Energi Batubara Lestari (EBL) is a coal mine that uses an open pit mining system, so it requiresslope security to create a safe and conducive mining environment. This study aims to analyze slopestability, the method used in this study is the boundary equilibrium method. The geological structure atPT. EBL has solids, sand lithology, loose sand, clay and coal, has a strong impact on slope stabilitybecause the more gaps, the more incoming water it will more easily affect weathered rocks so thatthey experience landslides. Slope stability analysis on the highwall side of the A-A side gets the FK1,851 value, the B-B side highwall side obtained by FK 1,676 and the highwall side of the C-obtainedside FK 1.54 indicates that the highwall slope is safe. And on the lowwall side the A-A side is obtainedFK 1,198, on the B-B side lowwall 'FK values obtained 0.94, and the C-C side lowwall side' is obtainedFK 1.27, indicating that on lowwall slopes in critical conidi. To make a stable or safe slope the slopegeometry is designed in lowwall areas with a high change and overall slope so that FK results areobtained: A-A design side 'lowwall slope 1,478, B-B design side' 1,447 lowwall slope while design sideC-C 'slope lowwall 1,497.

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