Satellite Interferometry as a Tool for Early Warning and Aiding Decision Making in an Open-Pit Mine

Nanfen open-pit iron mine is the largest single open-pit mine in Asia. Because of the lag of the extension project, the section has slowly spread in the shape of “V,” and disasters such as landslides occur frequently. In this study, first, the NPR anchor cable monitoring, which shows supernormal mechanical characteristics and can realize the monitoring and early warning target for the whole landslide process and early warning curve of bedding rock “2016-1101 landslide” in the lower wall of Nanfen open-pit mine, was analyzed, revealing the failure process of the bedding rock landslide and the force evolution characteristics of the NPR anchor cable. Then, based on the Fish language in FLAC3D and 3DEC software, the mechanical model of the NPR anchor cable was constructed, and numerical simulation was performed on the whole process of “16-1101 landslide” induced by accumulation of old landslide body. The results of this study indicate that the stress monitoring curves and failure characteristics of the NPR anchor cables in the whole process of landslide by the two numerical simulation methods are basically consistent with the field measurement results, providing a theoretical and practical basis for the mechanistic analysis and numerical simulation of other similar slopes.

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Risk-Based Decision Making Method for Selecting Slope Stabilization System in an Abandoned Open-Pit Mine

The Open Construction and Building Technology Journal ◽

10.2174/1874836802014010198 ◽

2020 ◽

Vol 14 (1) ◽

pp. 198-217

Author(s):

Mahnoush Gharehdaghi ◽

Hesam S. Tehrani ◽

Ali Fakher

Keyword(s):

Risk Assessment ◽

Decision Making ◽

Reliability Analysis ◽

Open Pit Mine ◽

Open Pit ◽

Upper And Lower Bounds ◽

Deep Excavation ◽

Economic Risk ◽

Stabilization Method ◽

The City

Background: The construction and stabilization of deep excavations are associated with several uncertainties due to heterogeneous geological conditions. Therefore, the conventional methods of slope stability analysis do not provide reasonable results. Aim: Hence, it is logical to perform reliability analysis and also risk assessment to make a wiser decision under uncertainty for choosing the proper stabilization method of slopes. Methods: In this regard, a real case study, a 50-meter-deep abandoned open-pit mine, is considered. In the past, the studied deep excavation was located in a rural area, away from the important structures. However, due to the development of the city, the open-pit mine is now located in the city. Furthermore, the Kan River is located on the eastern side of the excavation. Deterministic analysis showed that that Factor of Safety is not sufficient for permanent condition; thus, the deep excavation may have destructive impacts on the adjacent structures and infrastructures by putting them in danger in the case of failure. Results: These circumstances resulted in using reliability analysis and risk assessment using non-deterministic approach. Random Set Finite Element Method (RS-FEM), a non-probabilistic method, is used in determining how much the slope is reliable. The upper and lower bounds of probability of excessive displacement and probability of failure are obtained using RS-FEM by Plaxis2D software. Afterward, HAZUS is successfully used to quantify the economic risk of different stabilization alternatives by defining various scenarios in order to consider the consequences of excavation failure on adjacent utilities and infrastructures. Conclusion: The best alternative is defined as the stabilization method with the lowest economic risk. As a result, it is noticeable that this paper provides a comprehensive methodology for decision making, based on reliability analysis and risk assessment, in stabilizing slopes.

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Weighted aggregation operators of fuzzy credibility cubic numbers and their decision making strategy for slope design schemes

Current Chinese Computer Science ◽

10.2174/2665997201999200717165743 ◽

2020 ◽

Vol 01 ◽

Cited By ~ 1

Author(s):

Jun Ye ◽

Shigui Du ◽

Rui Yong ◽

Fangwei Zhang

Keyword(s):

Decision Making ◽

Fuzzy Set ◽

Real World ◽

Fuzzy Numbers ◽

Aggregation Operators ◽

Open Pit Mine ◽

Open Pit ◽

Weighted Arithmetic ◽

Ranking Of Alternatives ◽

Slope Design

Background: A fuzzy cubic set (FCS) is composed of a fuzzy set (FS) (certain fuzzy numbers) and an intervalvalued fuzzy set (IVFS) (uncertain fuzzy numbers) to describe the hybrid information of both. To enhance the credibility of both, they should be closely related to the measures/degrees of credibility owing to the vagueness and uncertainty of humans’ cognitions regarding the real world. Objective: This paper presents the notions of a fuzzy cubic credibility set (FCCS) and a fuzzy cubic credibility number (FCCN) as the new generalization of the FCS notion so as to enhance the credibility level of FCS by means of the credibility degrees of both FS and IVFS. Next, we define operations of FCCNs, an expected value of FCCN, and the FCCN weighted arithmetic averaging (FCCNWAA) and FCCN weighted geometric averaging (FCCNWGA) operators for decision making (DM) strategy. Method: A decision making (DM) strategy using the FCCNWAA or FCCNWGA operator is proposed to solve multicriteria DM problems in the environment of FCCNs. Then, the proposed DM strategy is applied to a DM example of slope design schemes for an open pit mine in the environment of FCCNs to reflect the feasibility of the proposed DM strategy. Result: By comparison with the fuzzy cubic DM strategy, the DM results with and without the degrees of credibility can impact on the ranking of alternatives in the DM example to reflect the effectiveness of the proposed DM strategy. Result: By comparison with the fuzzy cubic DM strategy, the DM results with and without the degrees of credibility can impact on the ranking of alternatives in the DM example to reflect the effectiveness of the proposed DM strategy. Conclusion: However, the highlighting advantage of this study is that the proposed DM strategy not only indicates the degrees of credibility regarding the assessed values of FCNs in the DM process but also enhances the DM reliability in the environment of FCCNs. Hence, the proposed DM strategy is superior to the fuzzy cubic DM strategy in the environment of FCCNs.

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On the monitoring and early-warning of brittle slope failures in hard rock masses: Examples from an open-pit mine

Engineering Geology ◽

10.1016/j.enggeo.2017.08.007 ◽

2017 ◽

Vol 228 ◽

pp. 71-81 ◽

Cited By ~ 39

Author(s):

Tommaso Carlà ◽

Paolo Farina ◽

Emanuele Intrieri ◽

Kostas Botsialas ◽

Nicola Casagli

Keyword(s):

Early Warning ◽

Hard Rock ◽

Open Pit Mine ◽

Open Pit ◽

Rock Masses ◽

Slope Failures ◽

Monitoring And Early Warning

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Arccosine and arctangent similarity measures of refined simplified neutrosophic indeterminate sets and their multicriteria decision-making method

Journal of Intelligent & Fuzzy Systems ◽

10.3233/jifs-201571 ◽

2021 ◽

pp. 1-13

Author(s):

Jun Ye ◽

Shigui Du ◽

Rui Yong ◽

Fangwei Zhang

Keyword(s):

Decision Making ◽

Comparative Analysis ◽

Similarity Measures ◽

Multicriteria Decision Making ◽

Open Pit Mine ◽

Open Pit ◽

Multicriteria Decision ◽

Slope Design ◽

Neutrosophic Number

In indeterminate and inconsistent setting, existing simplified neutrosophic indeterminate set (SNIS) can be depicted by the neutrosophic number (NN) functions of the truth, falsity and indeterminacy. Then, the three NN functions in SNIS lack their refined expressions and then the simplified neutrosophic indeterminate DM method cannot carry out the multicriteria DM problems with both criteria and sub-criteria in the setting of SNISs. To overcome the flaws, this study first proposes a new notion of a refined simplified neutrosophic indeterminate set (RSNIS), which is described by the refined truth, falsity and indeterminate NN information regarding both elements and sub-elements in a universe set, as the extension of SNIS. Next, we propose the arccosine and arctangent similarity measures of RSNISs and their multicriteria decision making (DM) method with various indeterminate risk ranges so as to carry out multicriteria DM problems with weight values of both criteria and sub-criteria in RSNIS setting. Lastly, the proposed DM method is applied to a multicriteria DM example of slope design schemes for an open pit mine to illustrate its application in the indeterminate DM problem with RSNISs. The decision results and comparative analysis indicate the rationality and efficiency of the proposed DM method with different indeterminate risk ranges.

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

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2018-12-64-36-48 ◽

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.

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

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2018-12-64-127-133 ◽

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.

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Qualitative assessment of equipment failure cause finding and removal

MINING INFORMATIONAL AND ANALYTICAL BULLETIN ◽

10.25018/0236-1493-2018-12-64-116-126 ◽

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.

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