Combined optimisation of an open-pit mine outline and the transition depth to underground mining

2018 ◽  
Vol 268 (2) ◽  
pp. 624-634 ◽  
Author(s):  
D. Whittle ◽  
M. Brazil ◽  
P.A. Grossman ◽  
J.H. Rubinstein ◽  
D.A. Thomas
Keyword(s):  
Underground Mining ◽  
Open Pit Mine ◽  
Open Pit ◽  
Transition Depth

scholarly journals Optimal Extraction Methods Selection for Kakosa South Copper Ore Deposit Applying Modified Technique for Order of Preference by Similarity to Idea Solution Model

2019 ◽  
Vol 9 (1) ◽  
pp. 127-132
Keyword(s):  
Fuzzy Numbers ◽  
Underground Mining ◽  
Open Pit ◽  
Open Pit Mining ◽  
Extraction Techniques ◽  
Modified Technique ◽  
Copper Ore ◽  
Ore Deposit ◽  
Transition Depth ◽  
Sublevel Stoping

Kakosa South copper deposit is located about 450km northwest of Lusaka between Chingola and Chililabombwe. A comprehensive study of Kakosa South deposit was carried out. In Kakosa area the footwall aquifer rocks comprising sandstone and conglomerates which are thin and as such are not expected to represent major aquifers. Copper mineralisation is found in the upper quartzite and ore-shale. The inclination of the deposit ranges from 250 up to 350 . The hangingwall formations above the upper quartzite are represented by a sequence of dolomite and shale formations. Based on Kakosa geotechnical analysis and rock mass classification, fuzzy TOPSIS approach was employed for the selection of optimal extraction techniques. FTOPSIS approach has precise and specific quantities which are used in order to establish criteria and option weights. Triangular fuzzy numbers were determined to represent semantic variables. The fuzzy numbers for Kakosa South parameters were used as input data in the decision making model and matched against the criteria required for the mining method. Applying FDM model, extraction techniques were ranked. The results indicated that open pit extraction technique was ranked first with 78.90 scores followed by sublevel stoping with 66.88 scores. It is concluded that the Kakosa South copper ore deposit can optimally be extracted by open pit mining up to transition depth and transit from open pit mining to underground mining employing sublevel stoping.

Study of the Influence of Block Caving Underground Mining on the Stability of the Overlying Open Pit Mine

2021 ◽  
Author(s):  
Nathan Chimi Tegachouang ◽  
Victor Mwango Bowa ◽  
Xinping Li ◽  
Yi Luo ◽  
Wenping Gong
Keyword(s):  
Underground Mining ◽  
Open Pit Mine ◽  
Open Pit ◽  
Block Caving ◽  
The Stability

Numerical Simulation Research on the Influence of Tailings Surcharge Load at Open-Pit Mine

2012 ◽  
Vol 507 ◽  
pp. 237-241
Author(s):  
Chun Mei Zhou ◽  
Dian Ji Zhang
Keyword(s):  
Underground Mining ◽  
Gold Deposits ◽  
Open Pit Mine ◽  
Open Pit ◽  
Stress Monitoring ◽  
Simulation Research ◽  
The North ◽  
Surcharge Load ◽  
Deformation Stress ◽  
Rock Beam

In this paper,international geotechnical engineering analysis software FLAC was used to simulate the influence of tailings surcharge load at open- pit mine to overlying orebody mining at the north of Axi gold deposits in Xinjiang.Engineering geological properties and the process of establishing geological model of open -pit mine in the north of Axi gold deposits in Xinjiang were introduced .It simulated the laws of deformation,stress and plastic zone of the top and base of wall rocks of underground mining in two conditions. The result shows that tailings surcharge load has less influence on orebody mining so that it is a feasible project. But we should strengthen the safety monitoring of rock mass,especially for displacement and stress monitoring of the rock beam.

scholarly journals Study on the Ground Movement in an Open-Pit Mine in the Case of Combined Surface and Underground Mining

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Zhenwei Wang ◽  
Gaofeng Song ◽  
Kuo Ding
Keyword(s):  
Underground Mining ◽  
Open Pit Mine ◽  
Physical Models ◽  
Ground Movement ◽  
Open Pit ◽  
Face Advance ◽  
Mining Operations ◽  
Strata Movement ◽  
Mining Conditions ◽  
Seam Mining

The combined surface and underground mining method is typically used in an open-pit mine for better production and profits. However, the improved scale of mining operations at the combined mining conditions results in even more intensive strata movement and massive ground damages. This paper assesses the progressive development of the characteristics of roof movement with the longwall face advance and its influence on the ground movement at the slope area using physical models. The identification of strata zones at the combined mining conditions is also included. The results show the following: (1) the failure of the competent strong roof creates an inverse arch-shaped rock block structure, which compacts the loose rock fragments in the caved zone; (2) a bed separation occurs above the inverse structure at the top of the disturbed strata configuration and extends upward with the face advance until it approaches the continuous bending zone; (3) more intensive strata movement and ground damages are produced by the large-scale multiseam mining operations, while regular and more distinct strata zones in the disturbed configuration are identified for less intensive single-seam mining; and (4) the intensive and massive underground mining activities increase the slope strata movement at the surface mining side. This research suggests that a less intensive mining activity is preferred in the combined surface and underground mining conditions from the point of view of ground control.

Management and engineering solutions to improve stripping equipment efficiency in Chernogorksy open pit mine

2018 ◽  
pp. 36-48
Author(s):  
G. N. Shapovalenko ◽  
S. N. Radionov ◽  
V. V. Gorbunov ◽  
V. A. Khazhiev ◽  
V. Yu. Zalyadnov ◽  
...  
Keyword(s):  
Open Pit Mine ◽  
Open Pit ◽  
High Concentration ◽  
Open Pit Mines ◽  
Blasting Operation ◽  
Internal Dump ◽  
Mining Conditions ◽  
Mining Front ◽  
Comparison Of Equipment

Chernogosky open pit mine integrates truck-and-shovel system of mining with overburden rehandling to internal dump with a set of walking excavators for rehandling of overburden to mined-out area of the pit. It is possible to improve efficiency of stripping in the conditions of Chernogorsky OPM by reducing percentage of stripping with more expensive handling system. The relevant research and solutions to this effect are presented in this article. Comparative characterization of mining conditions and parameters of mining systems applied is given for open pit mines Chernogorsky, Turnui, Nazarovsky, Vostochno-Beisky and Izykh. The comparative analysis points at the need to account for difficulty of mining and process sites in comparison of equipment productivity. High concentration of mining machines, which is conditioned by narrow mining front and simultaneous operation of five faces, as well as blasting operation implemented every 1-2 days, are recognized as the main constraints of excavator capacity in mining with direct dumping in Chernogorsky open pit mine. The management and engineering solutions implemented in the mine and resulted in higher efficiency of draglines are described.

Assessment of maintenance schedule uniformity for Belaz dump trucks in Chernogorsky open pit mine

2018 ◽  
pp. 127-133
Author(s):  
E. A. Vakulin ◽  
V. A. Ivashkevich ◽  
E. I.I. Gnitsak ◽  
V. S. Baikin ◽  
S. P. Maslyukov
Keyword(s):  
Open Pit Mine ◽  
Open Pit ◽  
Time Loss ◽  
Maintenance Schedule ◽  
Monthly Average ◽  
Dump Trucks ◽  
Maintenance Personnel ◽  
Productive Time ◽  
Assessment Results

Uniform schedule maintenance of mining and haulage machines is one of the key conditions for increasing productive time of maintenance personnel and decreasing monthly average servicing time. Currently, Russian mines infringe regulated maintenance schedule aimed to improve output per shift. The loss of time of maintenance personnel and equipment as a consequence maintenance irregularity is never assessed. This article presents assessment results on maintenance schedule uniformity in terms of dump trucks BelAZ-7513 and BelAZ-7530 at Chernogorsky open pit mine, SUEK-Khakassia. A variant of calculation of time loss owing to inconsistent maintenance schedule for dump trucks is proposed. The loss of time by maintenance personnel and by mining/haulage machines is assessed. The fleet of dump trucks BelAZ-7513 and BelAZ-7530 is analyzed depending on overtime of operation between maintenance periods. It is recommended to improve uniformity of maintenance schedule for mining and haulage equipment.

Qualitative assessment of equipment failure cause finding and removal

2018 ◽  
pp. 116-126
Author(s):  
E. A. Vakulin ◽  
A. I. Zayats ◽  
V. A. Beklemeshev ◽  
V. A. Ivashkevich ◽  
V. A. Khazhiev ◽  
...  
Keyword(s):  
Production Condition ◽  
Real Life ◽  
Open Pit Mine ◽  
Qualitative Assessment ◽  
Open Pit ◽  
Quality Level ◽  
Equipment Failure ◽  
Operation Conditions ◽  
Failure Investigation

Investigation of failures is one of the critical activities of mining and haulage equipment operability assurance in mining. Maintaining failure investigation at the required quality level, it is possible to identify provisions, rules and procedures that should be revised or changed, operation conditions that should be improved, additional personnel training, if required, etc. Investigation of failures in mines is under responsibility of machine men and electricians of maintenance and operation services. In reality, factory management and setup for production condition weak concernment of these workers in quality investigation aimed at finding of sources of equipment failures. This article describes real-life results achieved in development and use of maintenance service operation, technology and management monitoring. The requirements are substantiated for quality improvement in failure cause finding and removal in mining and haulage equipment at Chernogorsky open pit mine, SUEK-Khakassia. Causes of the present quality of failure investigation by machine men of Chernogorsky Repair and Engineering Works and Chernogorsky open pit mine are revealed. The proposed recommended practices will improve quality of mining and haulage equipment failure investigation.

Sign in / Sign up

Export Citation Format

Share Document