1 Scope
This document sets out the basic requirements and technical requirements for the comprehensive use of mine water.
This document applies to the comprehensive use of mine water for different purposes such as industrial water, miscellaneous water, ecological and environmental water, agricultural irrigation water and domestic drinking water.
2 Normative references
The contents of the following documents constitute essential provisions of this document through the normative references in the text. Among them, note the date of the cited documents, only the corresponding version of the 8 issues apply to this document; do not note the date of the cited documents, its latest version (including all the revision of the list) applies to this document.
GB/T 1576 Water quality for industrial boilers
GB3838 Environmental quality standard for surface water
GB5084 Water quality standard for agricultural irrigation
GB/T 5462 Industrial salt
GB 5749 Sanitary standards for living drinking water
GB/T 6009 Industrial anhydrous sodium sulfate
GB18597 Pollution Control Standard for Hazardous Waste Storage
GB18598 Pollution Control Standard for Landfill of Hazardous Waste
GB18599 General industrial solid waste storage and landfill pollution control standards
GB/T 18920 Water quality of miscellaneous urban water for urban wastewater reclamation
GB/T 18921 Urban wastewater recycling Water quality for landscape environment
GB/T 19223 Classification of mine water in coal mines
GB/T 19249 Reverse osmosis water treatment equipment
GB/T 19923 Urban wastewater recycling industrial water quality
GB20922 Urban wastewater recycling water quality for agricultural irrigation
GB/T 21534 Water conservation terminology
GB/T 33815 Technical specifications for wastewater treatment in iron ore mining enterprises
GB/T 37758 Technical Guidelines for Treatment and Reuse of Highly Mineralized Mine Water
GB/T 37764 Technical guidelines for treatment and reuse of acid mine water
GB50359 Design Code for Coal Washing Engineering
GB 50383 Code of Practice for Underground Fire Fighting in Coal Mines. Design Code for Sprinkler
GB51414 Water conservation design standard for non-ferrous metal enterprises
CJ/T 337 Urban sewage heat pump heat energy utilization water quality
HJ 579 Technical specification for membrane separation method sewage treatment project
HJ 2006 Technical Specification for Sewage Coagulation and Flocculation Treatment Engineering
MT76 Emulsified oil, concentrated fluid and its high water content hydraulic fluid for hydraulic support
SH3099 Water quality standard for SG water for petrochemical industry
3 Terms and definitions
GB/T 18920, GB/T 18921 , GB/T 19223, GB/T 19923 .GB 20922 .GB/T 21534 defined as well as the following terms and definitions apply to this document.
3.1
Mine water
The water produced by the collection of underground gushing water, surface infiltration water and production drainage water during the process of mine construction and mining.
3.2
Miscellaneous watermiscellancous water
Used for toilet flushing, road cleaning, fire-fighting, urban greening, vehicle washing, building construction and other non-potable water that does not come into close contact with the human body.
3.3
Ecological environmental water
Water used for river and lake replenishment, wetland replenishment, the creation of urban landscape water bodies and a variety of waterscape structures.
4 Basic requirements
4.1 Considering the water quality, technical feasibility and economic rationality of mine water, the comprehensive use of mine water should follow the principle of using it as much as possible, mainly for industrial water, miscellaneous water. It should be used mainly for industrial water, miscellaneous water, water for ecological environment, irrigation water for farmland and drinking water.
4.2 Mine water may be used for domestic drinking water if it has been approved by the relevant local authorities and if it has been treated to meet the requirements of GB5749.
4.3 Mine water with a total a radioactivity content of less than 0.5 Bg/L and a total beta radioactivity content of less than 1 Bq/L may be used.
4.4 According to the water quality and quantity of mine water, the mine water should be separated, treated and utilised in a graded manner.
4.5 Combined with the water quality and utilization of mine water, treatment equipment should be selected in accordance with GB/T19249.HJ579, HJ2006, etc.
4.6 The sludge produced after mine water treatment should be used reasonably or disposed of properly in accordance with the requirements of GB18597, GB18598 and GB18599.
4.7 Membrane concentrated water should be treated by multi-effect evaporator or steam mechanical recompression swallowers (MVR), etc. The by-product salts conforming to GB/T 5462 and GB/T6009 should be sold as products, and the waste salts not conforming to the standard should be disposed of in accordance with GB18597, GB18598 and GB18599 relevant provisions of solid waste management.
5 Technical requirements
5.1 Basic process of treatment and utilisation
The basic process of comprehensive utilization of mine water is shown in Figure 1.
5.2 Mine water quality testing and requirements
Mine water quality testing and requirements are shown in Table 1. Mine water quality testing and requirements for water treatment at the mine water level are implemented in accordance with Table 1.
5.3 Technical requirements for use
5.3.1 Acid mine water utilisation technology
Acid mine water utilisation technology is implemented in accordance with GB/T 37764.
5.3.2 Utilisation techniques for mine water containing suspended matter
Techniques for the use of mine water containing suspended matter should meet the following requirements:
a) Coagulation and sedimentation/clarification-filtration techniques are preferred;
b) Pre-sedimentation tanks should be installed prior to the purification process;
c) common coagulants for mine water containing suspended matter mainly include iron-based coagulants and aluminium-based coagulants, with coagulant aids where necessary.
5.3.3 High mineralisation mine water utilisation techniques
High mineralisation mine water utilisation techniques are implemented in accordance with GB/T 37758.
5.3.4 Utilisation techniques for mine water containing special contaminants
Mine water utilisation techniques for mines containing special contaminants should meet the following requirements:
a) For the comprehensive use of mine water containing iron and manganese, it is advisable to use air oxidation, chemical oxidation and contact oxidation technologies for iron removal.
Chemical oxidation or contact oxidation plus iron and manganese removal filter technology should be used, the basic process flow is shown in A.2.3 and A.2.4.
b) For comprehensive use of mine water containing fluoride, it is advisable to use pre-sedimentation, a mixed coagulation and precipitation, and filtration, adsorption/ion exchange/membrane separation technology, see A.3 for the basic process flow.
c) When the water from mines containing heavy metals is used for industrial water, it is advisable to use pre-sedimentation, chemical precipitation, filtration, adsorption, ion exchange, membrane separation and electrochemical treatment technology.
