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HJ 740-2015: Technical guideline for environmental risk assessment of tailings pond
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Technical guideline for environmental risk assessment of tailings pond
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HJ 740-2015
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Standard similar to HJ 740-2015 HJ 857 HJ 689 GB 4915 HJ 612 HJ 559 HJ 558 Basic data | Standard ID | HJ 740-2015 (HJ740-2015) | | Description (Translated English) | Technical guideline for environmental risk assessment of tailings pond | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z61 | | Classification of International Standard | 13.020 | | Word Count Estimation | 27,227 | | Date of Issue | 2015-03-06 | | Date of Implementation | 2015-04-01 | | Regulation (derived from) | Ministry of Environmental Protection Announcement 2015 No. 14 | | Issuing agency(ies) | Ministry of Ecology and Environment | | Summary | This Standard specifies the general principle tailings environmental risk assessment, content, procedures, methods and technical requirements. This Standard applies to the period running tailings environmental risk assessment, does not apply to storage of radioactive tailings, tailings environmental risk assessment associated with radioactive tailings. Wet stockpiling of industrial waste repository, environmental risk assessment of the implementation of power plant ash libraries may refer to this standard. | HJ 740-2015: Technical guideline for environmental risk assessment of tailings pond---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical guideline for environmental risk assessment of tailings pond
Technical guidelines for environmental risk assessment of tailings
Technical guideline for environmental risk assessment of
Tailings pond
2015-03-06 release
2015-04-01 implementation
Ministry of Environmental Protection released
National Environmental Protection Standard of the People 's Republic of China
Directory
Preface ..II
1 Scope of application
2 normative reference documents
3 terms and definitions
4 General .2
5 tailings bank environmental risk assessment preparation
6 tailings bank environmental risk prediction 4
7 tailings reservoir environmental risk classification .4
8 Tailings Environmental risk analysis and reporting
Implementation and supervision of standards
Appendix A (Normative Appendix) Pretreatment of Environmental Risk of Tailings
Appendix B (normative appendix) Assessment chart of environmental hazard indicators for tailings
Appendix C (Normative Appendix) Assessment of the Peripheral Environmental Sensitivity Index of Tailings
Appendix D (normative appendix) tailings reservoir control mechanism reliability index score table ..20
Appendix E (Informational Appendix) Outline of the Environmental Risk Assessment Report for Tailings
Foreword
In order to implement the Environmental Protection Law of the People's Republic of China, protect the ecological environment, assess the environmental risk of tailings,
standard.
This standard specifies the general principles, contents, procedures, methods and technical requirements for tailings reservoir environmental risk assessment.
Appendix A, Appendix B, Appendix C, Appendix D are normative and Appendix E is an informative appendix.
This standard is the first release.
This standard is proposed by the Environmental Emergency and Accident Investigation Center of the Ministry of Environmental Protection.
This standard is organized by the Ministry of Environmental Protection Science and Technology Standards Division.
The main drafting of this standard. the Ministry of Environmental Protection of the satellite environment application center, the Environmental Protection Department of Environmental Planning Institute, the Chinese Section
Institute of Process Engineering, Environmental Protection Institute of Environmental Standards, Beijing Mining and Metallurgy Research Institute.
This standard is approved by the Ministry of Environmental Protection on March 6,.2015.
This standard is implemented as of April 1,.2015.
This standard is explained by the Ministry of Environmental Protection.
Technical Guidelines for Environmental Risk Assessment of Tailings (Trial)
1 Scope of application
This standard specifies the general principles, contents, procedures, methods and technical requirements for tailings reservoir environmental risk assessment.
This standard applies to the risk assessment of the tailings during operation. It does not apply to the storage of radioactive tailings, accompanied by radioactivity
Environmental risk assessment of tailings in tailings.
The environmental risk assessment of wet storage of industrial waste residue and power plant ash storage can be carried out according to this standard.
2 normative reference documents
The contents of this standard refer to the following documents. For undated references, the valid version applies to this standard
quasi.
"Technical Requirements for Geological Hazard Assessment (Trial)" (Land and Resources [2004] No. 69)
3 terms and definitions
The following terms and definitions apply to this standard.
3.1
Tailings
Refers to the construction of dams or troughs to cover the metal and nonmetallic mines for ore sorting after tailings, wet
The place where waste or other industrial waste is produced during the smelting process.
3.2
Sudden environmental events
Refers to pollutants or radioactive substances due to pollution or natural disasters, production safety accidents and other factors, resulting in toxic
Harmful substances into the atmosphere, water, soil and other environmental media, suddenly caused or may cause environmental degradation, endangering the public
Public health and property safety, or damage to the ecological environment, or cause significant social impact, need to take urgent measures to
To deal with the incident, including air pollution, water pollution, soil pollution and other sudden environmental pollution incidents and radiation pollution
Pieces.
3.3
Environmental risk
Refers to the possibility of sudden environmental events during the operation of the tailings pond and the degree of harm that may occur in sudden environmental events.
3.4
Environmental risk receptors
Refers to the sudden environmental events may be harmed outside the enterprise crowd, with a certain social value or ecological environment function
Of units or regions.
3.5
Environmental risk assessment
According to the characteristics of the tailings of the tailings of the environmental risk characteristics, the tailings reservoir environmental risk level, identify the tailings reservoir may lead to sudden loop
Environmental risk factors, and its systematic environmental risk analysis, predict the possible consequences, put forward environmental risks
Prevention and control and environmental safety hazard investigation and treatment measures recommended process.
3.6
Environmental security risks
Refers to the rules during the operation of the tailings, due to not comply with relevant laws, regulations, rules, standards, procedures and management systems
Or may develop into an insecure state or defect that does not comply with the relevant provisions and may result in sudden environmental events.
3.7
Key Environmental Supervision Tailings
Refers to the end of the environmental risk through the tailings of the link, identify the environmental risks, the need for environmental protection authorities focus on monitoring
Management, supervision and supervision of tailings enterprises to carry out environmental risk assessment, environmental safety hazard investigation and management, environmental emergency preparedness plan
Tailings for environmental emergency management.
3.8
Characteristic contaminants
Refers to the tailings composition and tailings water composition, can reflect the characteristics of the surrounding environment of typical pollutants.
3.9
Environmental hazards
Refers to the tailings of the reservoir contained in the characteristics of pollutants, potential energy and other environmental hazards on the surrounding environment of the dangers.
3.10
Peripheral environmental sensitivity
Refers to the tailings of the surrounding various types of environmental risk receptors, environmental factors such as the sensitivity.
3.11
Control mechanism reliability
Refers to the possibility of reducing the occurrence of sudden environmental events in the tailings pond and reducing the degree of harm after the event of sudden environmental events
The effectiveness and reliability of surface control mechanisms.
4 General
4.1 Characteristics of pollutant control requirements
Characteristics of pollutants control the implementation of the EIA approved the relevant requirements, EIA approved after the country or local to develop more stringent pollutants
Emission standards, the implementation of new emission standards, emission standards and environmental impact assessment are not specified in the project, with reference to other relevant standards
Quasi-execution.
4.2 Assessment of Environmental Risk Receptor Survey
4.2.1 Investigation of water environment risk receptors Assessment. The lower reaches of tailings are not less than 10 km.
4.2.2 Other types of environmental risk Receptor survey Scope of assessment.
A) valley type, near mountain type, cut river type tailings. tailings downstream of not less than 80 times the dam height.
B) other types of tailings. tailings downstream of not less than 40 times the dam height.
4.2.3 The actual operation can be based on the actual situation to expand the scope of assessment.
4.3 Working procedures
4.3.1 Overall process
Tailings reservoir environmental risk assessment procedures (see Figure 1), by the tailings reservoir environmental risk assessment preparation, tailings reservoir environment
Risk prejudgment, tailings reservoir environmental risk classification, tailings reservoir environmental risk analysis and reporting preparation of four stages.
Figure 1 Working Procedure for Environmental Risk Assessment of Tailings
4.3.2 Preparation of tailings bank environmental risk assessment
The main contents of the preparatory work include the collection of relevant information and information.
4.3.3 Pretreatment of environmental risk of tailings
From the type, size, the surrounding environment sensitivity, safety, historical events and environmental violations of the five aspects of the tailings
Library environmental risk to predict, to determine whether it is a key environmental supervision tailings, whether the need for further environmental risk assessment
estimate.
4.3.4 Classification of Environmental Risk Classification of Tailings
The use of AHP, environmental hazards from the tailings (H), the surrounding environment sensitivity (S), the control mechanism can be
Reliability (R) three aspects of the classification, the use of environmental risk classification model, the key environmental supervision tailings reservoir environmental risk
Divided into major, large, general three grades, according to the rules of environmental risk level characterization.
4.3.5 Environmental risk analysis and reporting of tailings
For key environmental supervision tailings, in the tailings reservoir environmental risk assessment preparation, risk prediction, risk classification of the base
On the basis of the development of tailings reservoir environmental risk analysis and tailings reservoir environmental safety hazard investigation and management of relevant documents; and record tailings
Library environmental risk assessment to carry out the process, summed up the tailings reservoir environmental risk assessment of the relevant work content, the preparation of tailings reservoir environmental wind
Risk assessment report. For non-key environmental supervision tailings, only record environmental risk forecasting process.
5 tailings bank environmental risk assessment preparation
According to the tailings reservoir environmental risk assessment of the work needs, to collect relevant information and information, including. environmental impact
Evaluation documents and related approval documents, design documents, completion of acceptance documents, safety production evaluation documents, environmental supervision report,
Environmental monitoring report, characteristic pollutant analysis report, emergency plan, management system documents, daily running account and so on.
6 tailings bank environmental risk prediction
From the tailings of the type, size, the surrounding environment sensitivity, safety, historical events and environmental violations of five aspects,
The preliminary analysis of the environmental risk of the tailings reservoir is made by using the preliminary forecast of the environmental risk of the tailings reservoir (Appendix A).
Any of the conditions of the tailings reservoir that is identified as a key environmental supervision tailings, the need for further follow-up environmental risk assessment
jobs. Non-key environmental supervision tailings only need to carry out risk pre-assessment work, and record the risk of pre-assessment process and predict the results.
7 tailings reservoir environmental risk classification
7.1 Index System of Environmental Risk Classification of Tailings
The use of AHP, environmental hazards from the tailings (H), the surrounding environment sensitivity (S), the control mechanism can be
(R) three aspects (Figure 2) tailings reservoir environmental risk level division.
Figure 2 tailings reservoir environmental risk classification index system
7.2 Environmental Hazard (H)
Using the scoring method, the type, nature and scale of the three (Table 1) indicators were scored (the index scoring method
See Appendix B) with Accumulated Sum, Assessment of Tailings Environmental Hazard (H).
Table 1 tailings reservoir environmental hazards (H) equal division index system
No. Indicator Item Index score
Tailings ring
Dangerous environment
Type Mineral Type/Solid Waste Type/Tailings (or Tailings) Composition Type 48
nature
Characteristic contaminants
Indicator concentration situation
Concentration multiple of pH 8
3 the maximum concentration of the index 14
4 times the concentration of more than 3 times the number of indicators and 6
5 scale present situation capacity 24
(H) is divided into H1, H2, and H3 according to the environmental hazard classification of the tailings pond (Table 2)
Three equal.
Table 2 tailings reservoir environmental hazards (H) equal division table
Tailings reservoir environmental hazard score (DH) tailings reservoir environmental hazard equivalent code
DH > 60 H1
30 < DH ≤ 60 H2
DH ≤ 30 H3
7.3 Peripheral Environmental Sensitivity (S)
Using the scoring method, the tailings of the downstream involved in the cross-border situation, the surrounding environment risk receptor, the surrounding environment
(Table 3) Indicators (see Appendix C for each indicator scoring method)
Mineral Environment of Mineral Deposits (S).
Table 3 tailings surrounding environmental sensitivity (S) equal division index system
No. Indicator Item Index score
Tailings week
Side environmental sensitive
Sensibility
Downstream involves cross-border
Happening
Involving transboundary types
2 involves cross - border distance 6
3 surrounding environmental risk receptors
Peripheral environment function class
Other circumstances
Water Environment
Downstream water body
○ surface water
5 ○ sea water
6 Groundwater 6
Soil Environment
8 Atmosphere 3
According to the surrounding environment sensitivity of the tailings reservoir, the peripheral environmental sensitivity (S) is divided into S1,
S2, S3 three equal.
Table 4 tailings of the surrounding environment sensitivity (S) equal to the table
Tailings pool surrounding environment sensitivity score (DS) tailings reservoir surrounding environment sensitivity (S) other code
DS > 60 S1
30 < DS ≤ 60 S2
DS ≤ 30 S3
7.4 Control mechanism reliability (R)
Using the scoring method, the basic situation of the tailings, natural conditions, production safety, environmental protection and
Historical events in five aspects (Table 5) indicators to score (the index scoring method see Appendix D) and the cumulative sum of assessment, assessment
Reliability of the control mechanism of the tailing pit (R).
Table 5 tailings reservoir control mechanism reliability (R) equal division index system
According to the reliability of the tailings reservoir control system (Table 6), the reliability of the control mechanism (R) is divided into R1,
No. Indicator Item Index score
basic situation
Stockpile
Heap type 1.5
2 stacking method 1
3 dam body water 2
delivery
Delivery mode 1.5
5 Delivery 1
6 conveying distance 1.5
Backwater
Backwater way
8 back to the water 0.5
9 backwater distance 1
Flood control
Outside the river
11 Bank drainage facilities 2
12 natural conditions
Whether it is in accordance with the "geological hazard assessment of the technical requirements (Trial)" assessed as
"Hazardous Moderate" or "Hazardous" areas, or in geological hazards
Disaster area, karst (karst) land area.
13 production safety situation tailings reservoir safety and so on 15
Environmental protection
Happening
Environmental approval whether through the "three simultaneous" acceptance 8
Pollution Prevention
Water Discharge 3
16 anti-loss situation 1.5
17 anti - leakage situation 2.5
18 anti-loose situation 1.5
Environmental emergency
Environmental emergency facilities
Construction of Emergency Rehabilitation Pool
Construction of environmental emergency facilities for transportation system
21 backwater system environmental emergency facilities construction situation 1.5
Environmental Emergency Preparedness Plan 6.5
Environmental Emergency Resources
24 Environmental monitoring and warning
Daily check
Monitoring and warning 2
25 daily inspection 2
26 environmental security risks row
Check and governance
Environmental safety hazard investigation 3
Environmental Hazards Management
Environmental Disputes and Environmental Disputes
Whether the existence of environmental violations in the past three years or with the surrounding deposit
In environmental disputes
Historical events
Happening
Over the past three years
Accident or event
(Including safety and
Environmental aspects)
Event Level 8
Number of events 3
R2, R3 three equal.
Table 6 tailings reservoir control mechanism reliability (R) equal division table
Tailings reservoir control mechanism reliability (DR) tailings reservoir environmental hazard (R) equal code
DR > 60 R1
30 < DR ≤ 60 R2
DR ≤ 30 R3
7.5 Environmental risk classification
(T), environmental sensitivity (H), environmental sensitivity (S), control mechanism reliability (R)
(Table 7), the risk of tailings reservoir is divided into major, large,
Generally three grades.
Table 7 Environmental risk classification of tailings
No. Environmental risk level
Environmental Hazard (H) Peripheral Environmental Sensitivity (S) Control Mechanism Reliability (R)
H1
S1
R1 is significant
2 R2 significant
3 R3 is larger
S2
R1 is significant
5 R2 larger
6 R3 is larger
S3
R1 is significant
8 R2 larger
9 R3 General
H2
S1
R1 is significant
11 R2 larger
12 R3 is larger
S2
R1 is larger
14 R2 general
15 R3 general
S3
R1 in general
17 R2 general
18 R3 general
H3
S1
R1 is larger
20 R2 is larger
21 R3 General
S2
R1 in general
23 R2 general
24 R3 general
S3
R1 in general
26 R2 general
27 R3 General
7.6 Environmental risk level characterization
The tailings reservoir environmental risk rating can be characterized as "environmental risk level (environmental hazard equivalent code surrounding environmental sensitivity
Such as. environmental hazards for the H1 class, the surrounding environment sensitivity is
S2 class, the control mechanism reliability for the R3 class tailings reservoir environmental risk level can be characterized as "larger (H1S2R3)".
8 Environmental risk analysis and report preparation of tailings
8.1 Environmental risk analysis of tailings pond
This paper analyzes the environmental risk prejudgment of the tailings pond, the results of the environmental risk classification of the tailings and the risk characteristics,
(Appendix B and Appendix D) for the reliability of the hazard and control mechanisms, and the score will be greater than
Equal to 1 indicator, as a risk factor for sudden event events in tailings and marked in the planking plan. According to reality
The other indicators or content can also be used as a risk factor for sudden events in tailings.
According to the investigation and analysis of the status quo of tailings, combined with the effectiveness of existing environmental risk prevention and control measures,
The environmental events were analyzed and the corresponding countermeasures were put forward.
8.2 Environmental safety hazard investigation and management related documents
Based on the analysis of the environmental risk of the tailings, the summary of the tailings in the tailings reservoir control mechanism reliability index
Sudden environmental events risk factors, the formation of tailings reservoir environmental safety hazard checklist; in accordance with the principles of classification, the preparation of the environment
Safety hazard management plan; combined with hidden trouble investigation and day-to-day management work, the preparation of tailings reservoir environmental safety hazards management
For the program. For general environmental risk tailings, you can only prepare excerpts and schedules.
8.3 Preparation of tailings bank environmental risk assessment report
Record the development process of environmental risk assessment of tailings pond, summarize the risk assessment of risk of tailings, risk classification, risk
Analysis and other tailings reservoir environmental risk assessment of the relevant work content, the preparation of tailings reservoir environmental risk assessment report, the report outline see
Appendix E.
Standard Implementation and Supervision
This standard shall be supervised by the administrative department of environmental protection of the people's government at or above the county level.
Appendix A
(Normative appendix)
Risk Assessment of Environmental Risk of Tailings
Meet one of the following circumstances, included in the key environmental supervision tailings related instructions
Types of
Type of ore (including main ore, ancillary)/tailings (or tailings) Composition Type Solid waste type
1. Hazardous chemicals listed in the Catalog of Hazardous Chemicals for Hazardous Chemicals are used in the relevant production process.
Heavy metal minerals. copper, nickel, lead, zinc, tin, antimony, cobalt, mercury, cadmium, bismuth, arsenic, thallium, vanadium, chromium, manganese, molybdenum
3. Precious metal minerals. gold, silver, platinum group (platinum, palladium, iridium, rhodium, osmium, ruthenium).
4. Light non-ferrous metal mineral. aluminum (bauxite), magnesium, strontium, barium.
5. □ rare earth elements of minerals. yttrium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium.
6. □ non-ferrous metal mineral. tungsten, titanium.
7. □ non-metallic mineral. chemical raw materials or chemical ore.
8...
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