• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2009년도 특별 심포지엄
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• pp.89-100
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• 2009

3-dimensional modeling methods have been used in the every step of resource development; Exploration, reserve estimation, mine feasibility study, mine design and mine production. This report shows seven cases for which 3-dimensional modeling is used in resource development. Six projects deal with resource esimation, mine feasibility study and production. And another deals with mine rehabilitation. These cases show that 3-dimensional modeling method is beneficial to understand the real state of ore deposit and complex underground structures. Moreover, 3-dimensional modeling is the most efficient method for mine planning and management in the every step of resource development.

• Industrial Engineering and Management Systems
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• 제11권1호
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• pp.94-102
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• 2012

In this paper, an interactive planning and scheduling framework are proposed for optimising operations from pits to crushers in ore mining industry. Series of theoretical and practical operations research techniques are investigated to improve the overall efficiency of mining systems due to the facts that mining managers need to tackle optimisation problems within different horizons and with different levels of detail. Under this framework, mine design planning, mine production sequencing and mine transportation scheduling models are integrated and interacted within a whole optimisation system. The proposed integrated framework could be used by mining industry for reducing equipment costs, improving the production efficiency and maximising the net present value.

• 한국암반공학회:학술대회논문집
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• 한국암반공학회 2008년도 국제학술회의
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• pp.101-114
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• 2008

An efficient mine management system demand constant attention of mine managers on the key performance indicators like production targets, equipment status, condition of haul roads, safety etc.. There is a wealth of information generated during day to day working of the mine. The success of a mining enterprise is a function of reliability of accumulated information and decision making on the basis of such information. In the present paper a computerized mine operations management system developed for a large opencast mine making use of the potential benefits of geographical information systems, real time kinematic global positioning systems and a communication network to improve the overall efficiency of the mine is presented.

• 화약ㆍ발파
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• 제32권1호
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• pp.10-17
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• 2014

본 연구에서는 중앙아시아에 위치한 카자흐스탄을 방문하여 Kazakhmys광산을 소개하고 국내 발파 기술을 접목할 경우를 가정하여 최적의 발파 설계를 제안하고자 한다. 그 결과, 국내 발파 기술을 사용하더라도 카자흐스탄 광산에서 발생하는 화약 소모량과 천공수 등을 절감하여 최종적인 생산원가를 절감할 수 있는 발파 설계가 가능한 것을 알 수 있었다.

• 터널과지하공간
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• 제32권2호
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• pp.93-106
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• 2022

본 연구에서는 광산 현장에서 트럭 운전자들이 스마트 기기를 이용해 원석 생산 데이터를 기록하고, 이를 이용해 PC 환경에서 작업일지(운행일지)를 작성할 수 있는 애플리케이션을 개발하였다. 이를 위해 국내에서 가행 중인 4곳의 광산을 연구지역으로 선정한 다음 현장에서 사용하고 있는 작업일지를 확보하였다. 광산별로 작업일지에 포함되는 정보 요소를 분석하였다. 광산별로 작업일지 작성을 위해 기록하는 정보와 양식이 서로 다르므로, 원석 생산 데이터 기록과 작업일지 작성을 위한 애플리케이션은 연구지역 맞춤형으로 4종을 개발하였다. 블루투스 비콘의 신호를 수신하는 방법과 사용자가 직접 애플리케이션을 조작하는 방법으로 원석 생산 데이터를 기록할 수 있다. 기록된 데이터 파일은 클라우드 서버에 업로드되고, 업로드된 파일은 PC 환경에서 작업일지 작성 애플리케이션에 의해 현장에서 사용하는 형태의 작업일지로 변환할 수 있다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.1511-1516
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• 2009

In recent years, the large-scale shaft have been appling in domestic mine for mass production using a large machine, the safety of mine also have been increasing. And the new trial that shotcrete of tunnel field was apply to mine support was progressed. But, the conditions of domestic mine was different from that of tunnel, so, the batch plant of tunnel could not be installed in mine field because of low economical efficiency and difficulty for selection of site. Ready-mixed Shotcrete that mixed with high quality materials and could be controled shotcrete quality is producted in plants and transported to field, so do not need to batch plant. In this study, The Field test of the Ready-mixed Shotcrete was performed in the large-scale mine and was compared with the quality of Field mix shotcrete. As the result of the Field test, compressive strength and rebound of Ready-mixed Shotcrete were superior to these of Field mix shotcrete.

• Safety and Health at Work
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• 제10권2호
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• pp.188-195
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• 2019

Background: Mine workers in South Africa face challenges relating to poor health and safety, including fatigue risks, and poor socioeconomic and living conditions. Fatigue results in impaired mental and physical performance. The aim of this study was to assess contributors to fatigue of mine workers in South Africa. Methods: Data collection took place at four gold mines and one platinum mine in South Africa. A total of 21 focus groups were held with individuals in management, union representatives, and mine workers, and 564 questionnaires were completed by mine workers to gather information about fatigue and potential contributors to fatigue at these mines. Results: Qualitatively (through focus groups), fatigue was attributed to extended working hours, harsh working conditions, high workloads, production pressure, and resource constraints, along with aspects relating to demographic and socioeconomic factors, living conditions, lifestyle, health, and wellness. Greater fatigue was significantly associated with younger age, indebtedness, a lack of exercise, poor nutrition, less sleep, increased alcohol use, poor self-reported health, more sick leave, higher stress, and lower job satisfaction. Conclusion: The aim of the study was achieved; numerous work-, sociodemographic-, lifestyle-, and wellness-related factors were linked to fatigue in the participating mine workers. Contributors to fatigue should be addressed to improve health, safety, and sustainability in the industry.

• 터널과지하공간
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• 제25권3호
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• pp.221-230
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• 2015

본 연구에서는 국내외에서 개발된 광산관리 소프트웨어들을 조사하고 그 특징을 분석하였다. 해외에서는 다수의 기업들이 Dispatch, $Cat^{(R)}$ $MineStar^{TM}$, FARA 등과 같은 광산관리 소프트웨어를 개발하고 상용화하였다. 이 소프트웨어들은 실시간 장비 추적, 장비 할당 최적화, 생산량 관리, 장비 상태 모니터링, 원격조종과 같은 기능을 제공한다. 국내에서는 현재까지 상용화된 광산관리 소프트웨어는 없다. 일부 연구자들에 의해 GEMISIMS, Truck-Shovel fleet optimization 등의 소프트웨어가 개발되었으나, 다소 제한적인 기능만을 제공하고 있다. 추가적으로 본 논문에서는 보츠와나 Jwaneng 광산과 미국 Robinson 광산에서 광산관리 소프트웨어를 도입하여 활용한 사례를 조사하여 그 결과를 제시하였다.

• Journal of the Korean Wood Science and Technology
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• 제10권3호
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• pp.166-166
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• 1982

This study has been made to make an observation regarding present status of the coal mine props which is desperately needed for coal production, despite of great shortage of the timber resources in this country, and investigate the effects of diffusion process on the decay resistances of the mine props as applied preservatives of Malenit and chromated zinc chloride. The results are as follows. 1. Present status of the coal mine props Total demand of coal mine props in the year of 1975 was approximately 456 thousand cubic meters. The main species used for mine props are conifer (mainly Pinus densiflora) and hardwood (mainly Quercus). Portions between them are half and half. With non fixed specification, wide varieties of timber in size and form are used. And volume of wood used per ton of coal production shows also wide range from 0.017 cubic meter to 0.03 cubic meter. 2. Decay resistance test a) The oven dry weight decreased between untreated specimen and treated specimen has not shown any significantly, although it has shown some differences in average values between them. It may be caused by the shorter length of the test. b) The strength of compression test between untreated specimen and treated specimen has also shown the same results as shown in case of weight decrease. Reasons assumed are the same. c) The amounts of the extractives in one percent of sodium hydroxide (NaOH) between untreated and treated specimen have shown the large value in case of untreated specimen than that of treated. 3. The economical benifit between untreated and treated wood when applied in field has seen better in long tenn base in case of treated wood, although the primary cost of treated wood add a little bit more cost than that of the untreated wood.

• Geomechanics and Engineering
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• 제28권5호
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• pp.463-475
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• 2022

In the mine exploitation stage; one of the critical issues is the stability assessment of post-pillars. The instability of post-pillars leads to serious safety hazards in mining operations. The focus of this study is to assess the stability of post-pillars in the 130# stope in the central ore body at Trepça hard rock mine by employing both conventional (i.e., critical span curve) and numerical methods (i.e., FLAC3D). Moreover, a new numerical based index (i.e., Pillar Yield Ratio-PYR) was proposed. The aim of PYR index is to determine a border line between stable, potentially unstable, and failure state of post-pillars at a specific mine site. The critical value of pillar width to height ratio is 2.5 for deep production stopes (e.g., > 800 m). Results showed that pillar size, mining height and mining depth significantly have affected the post-pillar stability. The reliability of numerical based index (i.e., PYR) is verified based on empirical underground pillar stability graph developed by Lunder, 1994. The proposed pillar yield ratio index and pillar stability graph can be used as a design tool in new mining areas at Trepça hard rock mine and for other situations with similar geotechnical conditions.