Ultimate pit optimization with environmental problem for open-pit coal mine

The sustainable development and operation of mining enterprises as major sources of economic growth in many countries is determined by a balance of economic, environmental, and social objectives and the resources required to achieve these objectives. Transportation is one of the main equipment at open pits. It accounts for up to 70% of open pit operating expenses. Various parameters of transportation means should be coordinated both with the parameters of the open pit and meet the conditions of its operation. The authors have developed a universal system of criteria for selecting a dump truck model for open pit conditions. The novelty of the proposed system lies in the complex consideration of all known factors to date and criteria of dump truck selection and the allocation of four groups of criteria: technical, technological, environmental, economic, and organizational. The groups of criteria and specific criteria in each group were ranked by the degree of importance using the multi-criteria decision-making method FUCOM (Full Consistency Method). The methodology of creating criteria systems in conditions of influence on the choice of alternatives of a set of interrelated factors is presented. The peculiarity of the methodology is the evaluation of different sets of criteria by several groups of experts with different competencies. The obtained criterion ranks are recommended to be used by managers of mining enterprises to choose a dump truck model. The presented methodology is suitable for the development of new systems of criteria, considering significant changes in operating conditions or the emergence of factors not considered in this study. Evaluation of all models of dump trucks on the market using the developed system of criteria is envisaged by the authors in a future study.

Section: Results Of Ranking the Criteria Groups And Criteria Of The F...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-Criteria System’s Design Methodology for Selecting Open Pits Dump Trucks

Rakhmangulov,

Burmistrov,

Osintsev

2024

“…The author has been committed to developing quantitative mining optimization models to integrate by considering these factors as cost parameters. In past studies, the author proposed several algorithms to integrate by considering both economic and environmental factors in mining design [15][16][17]. Building on this foundation, the present study further refines the ecological cost quantitative model based on the environmental conditions around a coal mine and introduces safety as an additional SD factor in the UPL optimization algorithm.…”

Section: Introductionmentioning

confidence: 90%

“…Thus, the UPL optimization of the open-pit mine involved in this paper is carried out based on the floating cone method. The previous works by the author have delineated the theoretical and calculative methods for UPL optimization [16,17].…”

Section: Upl Optimization Using Floating Cone Methodsmentioning

confidence: 99%

Ultimate Pit Limit Optimization Method with Integrated Consideration of Ecological Cost, Slope Safety and Benefits: A Case Study of Heishan Open Pit Coal Mine

Xu,

Zhu,

et al. 2024

Self Cite

The ecological impacts of mining and the instability of slopes are the key factors restricting the safe, efficient, and low-carbon production of open-pit mines. This study focused on the ultimate pit limit (UPL) optimization under the concept of sustainability by integrating consideration of the economic benefit, ecological impact, and slope geometry. The integrated UPL optimization model based on the floating cone method was proposed by establishing a quantitative model for ecological impacts arising from open-pit coal mining in arid or semi-arid weak ecological land and a cost calculation model of slope reinforcement based on the Monte Carlo method. The case study revealed that steepening the slope angle of given regions resulted in random variations in the quantity of ore rock and the limit morphology. There was an average economic profit rise of USD 9.54M with every 1° increase in slope angle, but the probability of slope instability and the reinforcement cost grows exponentially. In the arid or semi-arid weak ecological land, the ecological costs exceeded 20% of the mines’ average pure economic gains. The proposed optimization method contributes to obtaining an integrated optimal UPL, improving the benefits and the ore recovery rate.

“…The principle of "whoever damages, recovers" has been proposed in numerous countries, including China, leading to the restoration and management of open-pit mines becoming a subject of great interest. The reclamation and comprehensive utilization of open-pit mines generally adopt the following approaches: (1) backfilling, (2) slope trimming and reinforcement, and (3) comprehensive utilization [2][3][4]. The backfilling technique not only resolves the issue of tailing disposal but also mitigates safety risks in the open pit.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Wet Backfilling in Open Pit on Slope Stability

Chen,

Niu,

Xiao

2023

The residual open pit left in the wake of open-pit mining poses significant safety hazards, with backfilling being an effective strategy to wholly eliminate these risks. The stability of the slope following wet backfilling, however, should not be overlooked. This paper examines the impact of the seepage field conditions and backfill height on the stability of open-pit slopes using a case study of cemented backfill in a specific open pit in Anhui Province. Moreover, it utilizes onsite research, Slide simulations, and similar simulation tests. The study findings suggest that as the height of the tailing solidification backfill increases, the safety factor of open-pit slopes gradually elevates. When the backfill height exceeds 10 m, all profiles of the studied open-air slope fulfill the stability prerequisites. Furthermore, when the solidification backfill reaches 20 m, all profiles of the studied open-pit slope satisfy the stability requirements. The research outcomes offer a methodology for mining corporations to avert slope instability and destruction, thereby providing effective safeguards for the extraction of scarce resources in mines.