초록 ▼

$\square$ 연구내용
O 사면안정성의 인자별 영향 분석 및 평가기법의 정립
- 현장암석 물성시험
- 사면변위계측
- 지하수위계 및 함수량계 설치 및 계측
- 안전성 영향요소 파악을 위한 현장자료 분석
- 최대 개발 한계 심도의 사면에 대한 안정성 분석
O 대규모 노천채광의 사면 안정성을 위한 제어발파 기술 개발
- 현행 발파법의 문제점 파악
- 발파진동 측정 및 발파특성 분석
- 개선된 발파법 제시 및 시험발파
O 운반 및 배수 및 운반의 최적화 및

$\square$ 연구내용
O 사면안정성의 인자별 영향 분석 및 평가기법의 정립
- 현장암석 물성시험
- 사면변위계측
- 지하수위계 및 함수량계 설치 및 계측
- 안전성 영향요소 파악을 위한 현장자료 분석
- 최대 개발 한계 심도의 사면에 대한 안정성 분석
O 대규모 노천채광의 사면 안정성을 위한 제어발파 기술 개발
- 현행 발파법의 문제점 파악
- 발파진동 측정 및 발파특성 분석
- 개선된 발파법 제시 및 시험발파
O 운반 및 배수 및 운반의 최적화 및 pit 설계최적화
- 현장자료 분석 및 프로그램 개발
- 현재 및 계획 pit 범위내에서 경제성분석 및 툴개발
$\square$ 연구범위
O 사면안정성의 인자별 영향 분석 및 평가기법의 정립
- 수치해석 및 확률론적 평가기법에 의한 사면의 안정성 해석
- 점토질 암반의 지하수와 관련된 특성시험
- 사면의 현장 변위계측
O 대규모 노천채광의 사면안정화를 위한 제어발파기술 개발
- 진동제어를 위한 발파진동 현장 계측 및 시험발파 수행
- 제안된 발파법에 대한 시험발파
- 발파패턴의 개선
O 운반 및 배수 및 운반의 최적화 및 pit 설계최적화
- GIS 기반의 운반에 대한 알고리즘 개발 및 프로그램개발
- Pit 최적화설계를 위한 프로그램 개발

Abstract ▼

The stability of slope in open pit mining is a major concern for the safety and productivity of mining operations. The objectives of this study are to design safe pit slopes. The detailed stability analyses were carried out in order to achieve these objectives. We took the measures to cope with fail

The stability of slope in open pit mining is a major concern for the safety and productivity of mining operations. The objectives of this study are to design safe pit slopes. The detailed stability analyses were carried out in order to achieve these objectives. We took the measures to cope with failures in some unstable slopes in Roto Pit of Pasir coal mine. A series of studies such as geological data analysis, detailed slope survey, in-situ and laboratory tests, rock strength and mechanical properties of the rock were concerned. Portable servo type vertical inclinometer probes were installed to measure any vertical displacement with inclinometer casing in the surveyed slopes. The GPS system were used to measure the displacement of slope. We can find that the measurements of displacement with GPS system is a good system in weak rock slopes. The piezometers are also installed to measure pore water and to analyse the effect of ground water to slope stability in surveyed slopes. The stability of slope was analyzed with numerical simulations by taking into consideration the mechanical properties obtained from the geotechnical investigations and in-situ measurement. The limit equilibrium method and the finite difference method were used for the slope design and the stability analysis of pit slopes and benches.
The typical blasting method adopted in surveyed coal mine is a surface blasting technique with a single free face. It means that there is only one free face, which is usually the ground surface. This kind of blasting method is easily applicable to any situation but inevitably causes enormous ground vibrations. The ground vibration can also affect the stability of the slopes comprising the various boundaries of the open pit mine. In addition, this blasting method can lower the blast efficiency compared to other methods such as bench blasting methods or general blasting methods with more than two free faces. In this respect, this project was launched to develop the new blasting method that is suitable for both controling the ground vibration and enhancing the blast efficiency. The current blasting method was analysed as well as some important guidelines that should be observed during the whole development process was established. In this paper the details of the typical blasting pattern was presented and the guidelines determined from the results of the observations were suggested.
In this study, a novel methodology that combines least cost path analysis and multi-criteria evaluation is proposed to determine the optimal haulage routes of dump trucks in open-pit mines. The model logic for optimal haulage routing considers four criteria which can significantly influence the planning of travel route of dump truck. The discrete friction cost which represents adverse effects of truck movement can be assigned using a fuzzy membership function. The weight of each criterion can be determined through the Saaty`s pairwise comparisons. This study also presents an application of GIS-based hydrological modeling and spatial analysis to a region of Pasir mine to effectively identify some vulnerable places to erosion on the bench face due to concentrated surface runoff. A detailed topographical survey was performed at the study area to generate a reliable DEM (Digital Elevation Model). Hydrology tools were used to extract the characteristics of drainage system such as flow direction, flow accumulation and catchment area from DEM. Finally, some practical measures were suggested to optimize the design of drainage system and to monitor the slope stability by the surface water management at the study region during heavy rainfall. The application showed that the proposed methodology could make optimal solutions to determine the haulage routes of waste dump trucks between loading areas and waste dumps and to identify vulnerable places to erosion. Finally, windows-based programs (i.e., "Dump Traveler", "Mine Hydro") were developed to provide mining engineers the suggested haulage and drainage analysis methods with convenience.
The development of open pit coal mine requires meticulous planning in different categories such as optimization of pit geometry, optimization of blasting parameters, transportation, economic viability and environmental issues. At the on-set, the geometry of the pit has to be designed based on economic viability of the deposit and as well as quality or grade of coal. A pit optimization software, MAXPIT has been developed based on Lerchs-Grossman pit optimization algorithm in Graphics User Interface (GUI) environment and has been developed for the analysis of optimum pit for surface coal/metal mines. The major input of the software are pit geometry including surface lines, coal/ore bodies, overall pit angle and bench height. Net pit value, stripping ratio, net profitability, coal production and amount of overburden removed of the optimized pit are some of the output of the software. This report elaborates on the development of the final software and applications of the same for determining optimum pit geometry for the entire of open pit mine in Roto south deposit. The report also deliberates on the net pit value along with stripping ratio and profitability for mining the coal seams of Roto South deposit.

목차 Contents

• 제 1 장 서론...16
• 제 2 장 국내외 기술개발 현황...20
• 제 3 장 연구개발 수행내용 및 결과...22
• 제 1 절 노천채광장에서의 문제점 및 시험광산의개요...22
• 1. 연약암반 노천채 광장에서의 문제점...22
• 2. 시험광산의 개요...25
• 3. 시험광산의 지질 및 지질구조...28
• 4. 시험광산의 사면안정성과 관련된 문제점...32
• 제 2 절 현장조사, 시험 및 계측...36
• 1. 조사사면...36
• 2. 현장시험 및 계측...36
• 제 3 절 사면의 안정성 분석...61
• 1. 역해석...61
• 2. 최종사면의 안정성 해석...69
• 3. 지하수 유동해석...74
• 제 4 절 사면 안정성 향상을 위한 발파공법 개선연구...81
• 1. 서론...81
• 2. 시험 탄광에서의 발파패턴 현황조사...82
• 3. 기존의 발파패턴 하에서의 지반진동의 측정 및 전파특성 분석...89
• 4. 지반진동 영향을 고려한 발파패턴의 설계 및 시험...98
• 5. 결론 및 제언...113
• 제 5 절 GIS를 이용한 운반 및 배수의 최적화...117
• 1. 개요...117
• 2. 국내외 기술개발 현황...120
• 3. 운반 효율성 향상을 위한 덤프트럭 최적 운반경로 분석...122
• 4. 시험광산의 배수시스템 분석에 의한 사면취약지역 분류...140
• 5. 프로그램 개발...147
• 제 6 절 pit 개발의 최적화...157
• 1. 개요...157
• 2. 채광구역에서의 Pit 경계의 최적화...157
• 3. MaxPit에 의한 pit 최적화...164
• 4. pit 최적화의 결과...170
• 5. 최적화된 pit의 평가...177
• 6. 결과검토...178
• 제 7 절 결론...179
• 제 4 장 연구개발목표 달성도 및 대외기여도...185
• 제 5 장 연구개발결과의 활용계획...188
• 제 6 장 참고문헌...190