1.0.1 This code was formulated in order to implement each law and regulation and policy of national development coal industry, promote and apply tried and true advanced technology and management experience of open pit mine, promote the scientific and technical progress, maintain the sustainable development of coal industry, improve the economic benefit of open pit mine, and achieve safety production and rational exploitation of coal resources.
1.0.2 This code is applicable to the pre-feasibility study, feasibility study and engineering design for the construction, renovation and extension of large and medium open pit mines. The pre-feasibility study, feasibility study and engineering design of small open pit mines may be carried out referring to this code.
1.0.3 For the constituent of open pit mine construction engineering project, the major works shall be the first and the principles of coordination based on specialization and socialization service shall be insisted.
1.0.4 For the engineering design of open pit mine, the economic benefit shall be the focus, and the sustainable development principle shall be put into effect, the high-yield and high-efficiency are the target, modern technical equipments shall be adopted, the informatization management shall be carried out and the policy of centralized production and environment burden reduce shall be put into effect. The engineering relation between short-term and long-term and short-term as the first shall be treated well.
1.0.5 For the pre-feasibility study and feasibility study of open pit mine, the necessity, feasibility and reasonableness of open pit mine construction shall be analyzed and researched comprehensively according to excavation field resource conditions, outside construction conditions, possible adopted exploitation process, technical equipments, groundwater control methods and market demand, financing and investment effect.
1.0.6 The policy of comprehensive utilization must be put into effect for the engineering design of open pit mine to effectively utilize resources and protect resources. The paragenetic and associated mineral resources shall be recycled or protected.
1.0.7 For the engineering design of open pit mine, the environmental protection engineering, soil and water conservation engineering and land reclamation project must be designed with main engineering together.
1.0.8 Except for the requirements stipulated in this code, those in the current relevant standards of the nation also shall be complied with for the pre-feasibility study, feasibility study and engineering design of open pit mine.
2 Basic Provisions
2.1 Exploitation Ambit
2.1.1 The economic stripping ratio of open pit mine shall be determined according to such conditions as occurrence of coal seam, capping characteristic, coal quality, technical equipments, resource recovery, production costs and product sale price and shall meet the following specifications:
1 The economic stripping ratio of lignite, mill coal and coke should respectively not be larger than 6m3/t, 10m3/t and 15m3/t;
2 The economic stripping ratio shall be calculated according to the product sale price for exploiting the lower heating coal with lower economic value;
3 The economic stripping ratio shall be calculated according to the comprehensive value for exploiting the open pit mine with multiple valuable minerals.
2.1.2 The openwork ambit shall be determined according to ambit stripping ratio less than or equal to economic stripping ratio. The open pit mine with coal seam occurrence condition and complicated topography shall be checked according to average stripping ratio.
2.1.3 For the engineering design of open pit mine, the feasibility of combined exploitation with open and mine may be considered according to the actual conditions of mines.
2.1.4 The coal pillar ambit shall be set up between openwork ambit and adjacent mine exploitation ambit.
2.1.5 The floor area of excavation field should be determined according to the final ground ambit of exploitation exceeding 50m. If there are such facilities as transmission line, communication line, road, dewatering hole and pipe network and anti-drainage, the corresponding width may be increased according to requirements.
2.2 Resources/Reserves
2.2.1 The pre-feasibility study of open pit mine shall be carried out according to approved detailed survey or open excavation field geology exploration report, the feasibility study and preliminary design shall be carried out according to approved open excavation field geology exploration report, and the design assessment shall be worked out according to exploration degree, resource reliability, coal quality condition, engineering geology, hydrological geology and economic significance.
1 General Provisions 2 Basic Provisions 2.1 Exploitation Ambit 2.2 Resources/Reserves 2.3 Design Production Capacity 2.4 Transportation Mode Development and Procedure Exploitation 3 Exploitation Process 3.1 General Requirements 3.2 Intermittent Exploitation Process 3.3 Continuous Exploitation Process 3.4 Hemicontinuous Exploitation Process 3.5 Open Casting Exploitation Process 3.6 Other Exploitation Processes 3.7 Perforation Blasting 4 Internal Transportation 4.1 General Requirements 4.2 Truck Transportation 4.3 Belt Conveyor Transportation; 4.4 Railway Transportation 5 Dumping site 5.1 General Requirements 5.2 Specification of Dumping Line 5.3 Dumping Mode and Equipment Selection 6 Slope Stability Engineering 7 Groundwater Control 7.1 General Requirements 7.2 Groundwater Control Methods 7.3 Hydrologic Geology Calculation 7.4 Equipment and Ancillary Facilities 7.5 Filter 8 Waterproofing and Drainage 8.1 Drainage of Excavation Field 8.2 Ground Anti-drainage 9 Production System 9.1 Production Capacity 9.2 Crushing 9.3 Coal Storage 9.4 Loading 10 General layout plans of industrial site 10.1 Site Selection 10.2 General Layout Plans 10.3 Perpendicular Layout as well as the Waterproof and Drainage of Site 10.4 Site Road 11 Electromechanical Devices Maintenance 11.1 General Requirements 11.2 Mechanical Equipment Maintenance 11.3 Electrical Equipment Maintenance 11.4 Storehouse 12 Electricity 12.1 Power Supply and Substation 12.2 Distribution of Excavation Field and Dumping Site 12.3 Dewatering and Power Distribution 12.4 Power Distribution of Production System and Ancillary Facilities 12.5 Electric Traction Power Supply 12.6 Lightning Protection and Earthing 12.7 Railway Signal 13 Communication 13.1 General Requirements 13.2 Communication of Production Scheduling 13.3 Administrative Management Communication 13.4 Cable Television System 13.5 Communication Line 14 Centralized Control as well as Monitor and Computer Management 14.1 General Requirements 14.2 Centralized Controlling and Monitoring 14.3 Computer Management 15 Ground Construction, Water Supply and Drainage as well as Heating and Ventilation 15.1 General Requirements of Ground Construction 15.2 Crushing Station 15.3 Nose Station (driving station, reload station) and Distribution Station 15.4 Belt Convey Trestle or Underground 15.5 Coal Yard of Run-of-mine Coal 15.6 Administration and Public Constructions 15.7 Water Source 15.8 Water Supply 15.9 Fire Fighting, Pipelines and Devices 15.10 Drainage 15.11 Heating 15.12 Ventilation 15.13 Heating 16 Environmental Protection 16.1 General Requirements 16.2 Pollution Prevention 16.3 Land Reclamation as well as Water and Soil Conservation 16.4 Organization Structuring and Investing 17 Technical Economy 17.1 General Requirements 17.2 Labor Requirement and Labor Productivity 17.3 Investment Estimation and Budget Estimation 17.4 Technical and Economic Evaluation 17.5 Comprehensive Evaluation of the Technical Economy Annex A Classification of Solid Mineral Resources/reserves Annex B Estimation Indices of Coal Resources Annex C Classification and Calculation of Resources/Reserves in the Pre-feasibility Study Feasibility Study and Preliminary Design C.1 Classification and Calculation of the Resources/reserves in the Pre-feasibility Study (I) C.2 Classification and Calculation of the Resources/reserves in the Pre-feasibility Study (II) C.3 Classification and Calculation of Resources/reserves in the Feasibility Study and Preliminary Design Explanation of Wording in this Code
