MINISTRY OF EDUCATION AND TRAINING
UNIVERSITY OF MINING AND GEOLOGY
RESPECT THE LAW
OPTIMIZE THE COORDINATION BETWEEN EXCAVATORS AND VEHICLES
FOR OPEN PIT COAL MINING IN QUANG NINH REGION
Industry: Mining Code: 9520603
DOCTORAL THESIS IN ENGINEERING
SCIENTIFIC INSTRUCTOR : 1: Associate Professor, Dr. BUI XUAN NAM
2: Assoc.Prof.Dr. NGUYEN DUC KHOAT
HANOI - 2018
COMMITMENT
I hereby declare that this thesis is my independent scientific research work. The data and research results in this thesis are honest and have never been used to defend any academic degree. I also declare that all references for the thesis have been clearly stated.
Hanoi, date month year 2018
PhD student
Doan Trong Luat
ACKNOWLEDGEMENTS
The doctoral thesis in Mining Engineering with the topic " Optimizing the coordination between excavators and cars for open-pit coal mines in Quang Ninh area " is the result of the author's continuous research and efforts over the past time with the enthusiastic help of teachers of the University of Mining and Geology, scientists in the mining industry, friends, colleagues and family.
The author would like to express his deep gratitude to the Board of Directors of the University of Mining and Geology, the Department of Postgraduate Training, the Board of Directors of the Faculty of Mining, the Board of Directors and all the teachers of the Department of Open-pit Mining and the teachers in the University of Mining and Geology for their attention and support in helping the PhD student complete his doctoral thesis.
The PhD student would like to express his respect and deep gratitude to the Guidance Subcommittee: Associate Professor, Dr. Bui Xuan Nam and Associate Professor, Dr. Nguyen Duc Khoat for their direct and enthusiastic guidance, providing necessary documents and information to the PhD student as well as regularly urging the PhD student to work and complete his doctoral thesis on time.
Finally, the PhD student would like to sincerely thank the Board of Directors of the Department of Natural Resources and Environment of Quang Ninh province, his brothers, sisters, friends, colleagues; scientists in the mining industry and other related industries who have created favorable conditions to help the PhD student during his study and thesis. Through this, the PhD student would also like to thank his family for always being by his side and encouraging him throughout the past time so that the PhD student could successfully complete his scientific research work.
PhD student
Doan Trong Luat
INDEX
COMMITMENT i
ACKNOWLEDGEMENTS ii
TABLE OF CONTENTS iii
ABBREVIATIONS vii
LIST OF TABLES viii
INTRODUCTION 1
CHAPTER 1 ASSESSMENT OF THE CURRENT STATUS OF COORDINATION BETWEEN EXCAVATORS AND VEHICLES AT OPEN-PIT COAL MINES IN QUANG NINH REGION 5
1.1. CURRENT STATUS OF OPEN-PIT COAL MINING IN QUANG NINH REGION 5
1.1.1 Overview of coal potential and development orientation in Quang Ninh region 5
1.1.2. Geographical location of open-pit coal mines in Quang Ninh 6
1.1.3. Current status of mining at open-pit coal mines in Quang Ninh 7
1.2. CURRENT STATUS OF EXCAVATOR USE AT OPEN-PIT COAL MINES IN QUANG NINH REGION 13
1.2.1. Current status of excavator use at Deo Nai 13 coal mine
1.2.2. Current status of excavator use at Cao Son 20 coal mine
1.2.3. Current status of excavator usage at Coc Sau 25 coal mine
1.2.4. General assessment of the current status of excavator usage at the three mines Deo Nai, Cao Son and Coc Sau 29
1.3. CURRENT STATUS OF AUTOMOBILE USE AT OPEN-PIT COAL MINES IN QUANG NINH REGION 30
1.3.1. Current status of car use at Deo Nai 30 coal mine
1.3.2. Current status of car use at Cao Son 35 coal mine
1.3.3. Current status of car use at Coc Sau 39 coal mine
1.4. CURRENT STATUS OF COORDINATION BETWEEN EXCAVATORS AND VEHICLES AT OPEN-PIT COAL MINES IN QUANG NINH REGION 44
1.4.1. Current status of equipment synchronization at Deo Nai, Cao Son and Coc Sau 44 coal mines
1.4.2. Current status of excavator - truck coordination at Deo Nai, Cao Son and Coc Sau 46 mines
1.4.3. Some shortcomings in the coordination between excavators and cars at open-pit coal mines in Quang Ninh area 48
1.4.4. Some solutions to improve the efficiency of excavator - car synchronization at open-pit coal mines in Quang Ninh area 49
1.5. CONCLUSION OF CHAPTER 49
CHAPTER 2 OVERVIEW OF SOME DOMESTIC AND FOREIGN ALGORITHMS USED TO CALCULATE SYNCHRONIZATION OF EXCAVATORS AND VEHICLES IN OPEN-PIT MINES 51
2.1. OVERVIEW OF SOME DOMESTIC ALGORITHM USED TO CALCULATE SYNCHRONIZATION OF EXCAVATORS - AUTOMOBILES 51
2.1.1. Balancing the number of equipment in the loading and transport chain in open-pit mines using economic problems 51
2.1.2. Determining the productivity of the car - excavator combination in open-pit mines taking into account reliability 57
2.1.3. Determining the number of cars serving an excavator in open-pit mines 60
2.1.4. Determining the relationship between excavators and trucks in open-pit mines based on excavator bucket capacity, truck load and transport distance 62
2.2. OVERVIEW OF SOME FOREIGN ALGORITHMS IN CALCULATION OF SYNCHRONIZATION OF EXCAVATORS - AUTOMOBILES 64
2.2.1. Queue Algorithm 64
2.2.2. Monte Carlo algorithm and its application in open-pit mines 71
2.2.3. Group of methods based on the study of device operations in synchronization 82
2.2.4. Group of methods using artificial intelligence: 85
2.2.5. Group of research methods of former Soviet mining scientists 88
2.2.6. Group of research methods based on available computational software programs 89
2.3. CONCLUSION OF CHAPTER 93
CHAPTER 3 RESEARCH ON OPTIMIZATION METHODS OF COORDINATION BETWEEN EXCAVATORS AND VEHICLES FOR OPEN-PIT COAL MINES 99
3.1. FACTORS AFFECTING THE EFFICIENCY OF COORDINATION BETWEEN EXCAVATORS AND VEHICLES IN OPEN-PIT COAL MINES IN QUANG NINH REGION 99
3.1.1. Using a variety of equipment 99
3.1.2. The transport curve has not been updated according to the displacement step of the mining mirror 100
3.1.3. Using old, low-productivity equipment 101
3.1.4. Unreasonable loading and unloading diagram 101
3.1.5. Effect of vehicle speed on transport cycle 103
3.1.6. Impact of road quality 104
3.1.7. Influence of the type of material loaded and transported 104
3.1.8. Impact of transport cycle on mine 106
3.2. SOLUTIONS TO OPTIMIZE COORDINATION BETWEEN EXCAVATORS AND VEHICLES IN OPEN-PIT MINES 107
3.2.1. Use fewer types of equipment 107
3.2.2. Periodically update the transport curve according to the displacement of the mining mirror 107
3.2.3. Do not use equipment that is too old 108
3.2.4. Optimizing loading and unloading schemes 108
3.2.5. Optimizing vehicle speed (loaded and unloaded) 110
3.2.6. Improving the quality of transport routes 111
3.2.7. Using open transport cycle instead of closed transport cycle 111
3.3. DEVELOPING OPTIMIZATION METHOD AND SOFTWARE PROGRAM FOR SYNCHRONIZING EXCAVATORS - AUTOMOBILES FOR OPEN-PIT COAL MINES IN QUANG NINH REGION 112
3.3.1. Determining the productivity of excavator 112
3.3.2. Determining the productivity of cars 114
3.3.3. Calculation of synchronous productivity 116
3.4. CONCLUSION OF CHAPTER 132
CHAPTER 4 EXPERIMENTAL CALCULATIONS FOR SOME OPEN-PIT COAL MINES IN QUANG NINH REGION USING OST 133 SOFTWARE PROGRAM
4.1. EXPERIMENTAL CALCULATIONS FOR LOADING AND TRANSPORTING COAL FOR CAO SON 133 COAL MINE
4.1.1. Case 1 133
4.1.2. Case 2 138
4.1.3. Case 3 143
4.1.4. Case 4 147
4.2. TEST CALCULATIONS FOR LOADING AND TRANSPORTING EXCAVATED SOIL AND ROCK FOR DEO NAI 151 COAL MINE
4.2.1. Case 1 151
4.2.2. Case 2 155
4.2.3. Case 3 159
4.2.4. Case 4 164
4.3. CONCLUSION OF CHAPTER 167
CONCLUSION AND RECOMMENDATIONS 169
PUBLISHED WORKS OF STUDENT .....
REFERENCES 171
ABBREVIATIONS
Sync devices | |
DMC | Dynamic Monte Carlo method |
DSMC | Direct Monte Carlo simulation method |
FRM | First Reaction Method |
Technical Support | Technical Support |
KMC | Dynamic Monte Carlo method |
KSCI | Useful minerals |
LATS | PhD Thesis |
LP | Linear Programming |
MXTLGN | Hydraulic backhoe excavator |
NCS | PhD student |
NPV | Real present value |
OST | Optimize the coordination between excavator and car |
Probability density function | |
QMC | Quantum Monte Carlo method |
RNG | Random number generator |
RSM | Random selection method |
TH | Case |
THD | Synchronized equipment combination when removing soil and rock |
THT | Synchronized equipment combination when mining coal |
TKV | Vietnam National Coal - Mineral Industries Group |
Construction materials | Construction materials |
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