What does the coal mine double cleaning mean?

Original title: Liu Feng: Scientific understanding of the role and status of coal in the new era Source: China Coal Industry Association

The Central Economic Work Conference held in February 2002165438 clearly pointed out that the gradual withdrawal of traditional energy should be based on the safe and reliable substitution of new energy. Based on the basic national conditions of coal, do a good job in clean and efficient utilization of coal, increase the capacity of new energy consumption, and promote the optimal combination of coal and new energy.

Coal is the basic energy and important industrial raw material in China. Since the founding of New China, it has produced more than 96 billion tons of raw coal, which has provided a reliable energy guarantee for national economic and social development. Facing the goal of becoming a modern power and the requirement of carbon neutrality in peak carbon dioxide emissions, it is necessary to scientifically understand the role and position of coal in the new period, continuously promote the transformation and upgrading of coal consumption, realize the green and low-carbon transformation of coal industry, and promote the new strategy of energy security to develop in depth.

Based on the basic national conditions, improve the ability of accurate regulation and support of coal supply

The endowment condition of energy resources in China is "rich in coal but short of oil and gas". In 2020, coal consumption accounts for 56.8% of the total energy consumption, while clean energy consumption such as natural gas, hydropower, nuclear power and wind power only accounts for 24.3%. At present, China's energy demand is still increasing. Although the proportion of coal in the total energy consumption is declining, considering that renewable energy cannot replace traditional fossil energy on a large scale in the short term, coal will still be the "ballast stone" and "stabilizer" of China's energy supply.

Therefore, a stable coal supply is an important part of China's energy security. This involves the availability, availability, sustainability and ecology of coal, and depends on the occurrence and exploration and development level of coal resources in China, the maturity and cost of mining technology and technology, the storage-production ratio of coal resources and its utilization efficiency, and the degree of environmental damage caused by coal development and utilization.

We can call the dynamic change interval of coal consumption to ensure the sustainable development of the industry for a period of time "coal safety interval". Determining "coal safety zone" has become an important topic to improve the ability of reliable coal supply guarantee. "Coal safety interval" is a dynamic bounded interval. The upper limit of interval is the maximum value of coal consumption at a certain time node, which is affected by factors such as capital investment, carbon emission reduction, ecological environment protection, energy supply structure and so on. The lower limit of interval is the minimum coal consumption required to ensure energy supply at a specific time node, which is determined by the short-term guaranteed bottom characteristics of coal, the orderly replacement of medium and long-term new energy and the raw material properties of coal.

At the same time, in order to realize accurate regulation and effective guarantee of coal supply, it is necessary to strengthen the construction of new reserve capacity, including both the accurate exploration capacity of resource reserves and the development and construction capacity of coal mines. It is also necessary to improve the coal storage capacity, rationally build coal storage facilities, and increase the flexibility and toughness of supply.

Respond to major challenges and promote the transformation of coal production mode and management mode

The transformation, upgrading and high-quality development of the coal industry are facing a series of new challenges such as safe production, ecological protection, low-carbon consumption and digital transformation. First of all, with the continuous increase of mining depth, some coal mines have developed from low gas to high outburst mines, from non-impact ground pressure danger to weak impact or strong impact, and the hydrogeological types have developed from simple to complex or extremely complex, making disaster prevention and control increasingly difficult. Secondly, among the 14 large coal bases, 9 bases are located in the Yellow River valley, including northern Shaanxi, northern Shaanxi, Jinzhong, eastern Shanxi, Huanglong, Shendong, eastern Ningxia, western Shandong and Henan, which puts forward higher requirements for the development of coal resources. Third, coal is a traditional high-carbon energy source. Reducing the total coal consumption and the intensity of carbon emission in the process of consumption is an inevitable choice to achieve the goal of "double carbon" and also a difficult problem to be solved urgently at present. Fourthly, the coal industry, as a traditional industrial field, has a relatively weak digital foundation, and digital transformation is difficult. To cope with these major challenges, the coal industry is required to fully and accurately implement the new development concept, actively build a new development pattern, firmly implement the new strategy of energy security, and continue to promote reform and self-revolution.

Intelligent coal mine construction is a concrete action for coal enterprises to participate in building a new development pattern under the new development concept, and it is also an inevitable choice for coal enterprises to meet miners' yearning for a better life. However, with the deepening of coal mine intelligent construction and the continuous improvement of coal mine productivity, it will inevitably bring about the adjustment of coal mine production organization mode and management mode, and the "production relationship" in coal mine must adapt to the intelligent "productivity" level. Therefore, with the intelligent construction of coal mines, improving the production and organization management ability of coal mines has become a "must-do job" for coal enterprises.

At present, China's coal mine intelligent construction has been at the forefront of the whole mining field, which has effectively promoted the deep integration of a new generation of information technology and mining. According to the preliminary statistics, by the end of 2002 1 16 intelligent coal mines had been built in China, 132 intelligent coal mining faces passed the acceptance of provincial-level (central enterprises), 105 intelligent tunneling faces passed the acceptance of provincial-level (central enterprises), and 26 kinds of robots were in the mine.

Promote consumption upgrading and accelerate the transformation of coal into clean fuels and high-quality raw materials.

China has made remarkable progress in transforming coal-fired power generation into ultra-low emission and accelerating the clean transformation of coal fuel. As a raw material, coal can not only fix carbon, but also provide rich petroleum products and chemicals, effectively expanding the space for coal consumption and utilization.

As a raw material, coal develops to the high end precisely for the purpose of continuously extending the industrial chain and developing high-performance products. First, strengthen the research and development of special oil products such as aerospace coal-based high-performance fuel, marine diesel, special environmental protection fuel and integrated general fuel; Second, strengthen the technical research of coal-based degradable plastics such as polyglycolic acid (8967, 22.00, 0.25%), and master the grafting and capping technology of oxygen-containing monomers, which is close to the level of general plastics; Thirdly, using coal liquefied oil residue asphalt (3594,-18.00, -0.50%) and coal tar asphalt as raw materials, develop materials for national defense and aerospace, such as high-modulus carbon fiber, activated carbon for supercapacitors, and anode for high-performance energy storage batteries; Fourth, tackle key problems of indirect liquefied α -olefin separation and processing technology, high-end lubricating oil and high-end Fischer-Tropsch wax preparation technology, and extend the coal-to-olefin industrial chain.

The diversified development of coal as raw material is to give full play to the advantages of differentiated development of coal chemical industry. First, research and development of coal-to-liquid and coal-to-chemical co-production coupling technology and product joint processing technology to realize product diversification; Second, research and develop the cracking technology of naphtha and methanol (2795,-16.00, -0.57%), optimize the thermal balance of naphtha cracking reaction and methanol-to-olefins reaction, produce olefins and co-produce PX at the same time, and realize the diversification of research and development materials; The third is to explore the coupling technology between coal chemical industry and new energy, natural gas chemical industry, biochemical industry, petrochemical industry and metallurgical building materials process, and provide solutions to optimize energy efficiency and material consumption.

The development of low-carbon coal as raw material is to build a zero-carbon coal chemical industry. First, research and develop new efficient catalysts, processes and process energy-saving technologies to realize carbon reduction at the source of coal chemical process; The second is to break through the coupling technology of renewable energy and coal chemical synthesis to produce hydrogen and oxygen, and apply green hydrogen and green oxygen to reduce carbon emissions in coal chemical process; Third, use renewable energy green electricity as electricity, develop high-efficiency heat storage steam production technology, and use green electricity and low-cost electricity to produce steam; The fourth is to tackle key problems in CCUS technology of coal chemical industry, break through technologies such as low-cost carbon dioxide capture, chemical and mineralized utilization of carbon dioxide, and geological storage of carbon dioxide flooding, and develop chemicals such as aromatics, ethanol, ethylene glycol, olefins, carbonates and DMF from carbon dioxide.

Strengthen scientific and technological innovation, build a standard system and ensure the high-quality development of the industry.

Facing the requirements of coal safety and green low-carbon transformation, the coal industry has put forward "3110" scientific and technological innovation tasks, including three basic theoretical studies: green intelligent mining of coal, prevention and control of major disasters in coal mines and clean and efficient transformation of coal. Ten scientific and technological innovation demonstrations, such as coal resource exploration and geological protection, large-scale modern mine construction, coordinated mining of coal and associated resources, coal mine disaster prevention, coal mine intelligence and robots, clean and efficient coal processing, low-carbon coal conversion and utilization, occupational health protection in coal mines, coal mine emergency rescue, core technology research in ten key areas of resource utilization and ecological protection in mining areas, full-face rapid excavation in coal mines, intelligent fully mechanized mining in coal seams with complex geological conditions, and intelligent coal mine construction. Intelligent fine and efficient washing, coal quality utilization, coal liquefaction and preparation of high-end chemicals, comprehensive utilization of underground space resources in abandoned mines, resource utilization of bulk solid wastes in mining areas, ecological restoration of large mining areas, accurate control of coal product quality, and popularization and application of hundreds of advanced and applicable technologies.

It is of great significance to build a new standard system in the coal field and give play to the basic and leading role of standardization to ensure the high-quality development of the coal industry. At present, the standards in the coal field mainly focus on coal exploration, construction, production, coal processing and utilization. , and should be further extended to production services and other fields, and efforts should be made to formulate key technical fields such as miners' health, green mining, coal mine intelligence, ecological construction in mining areas, clean utilization of coal, and carbon emission reduction. At the same time, strengthen the cooperation of technology research and development, standard formulation and application promotion, strengthen the independent formulation of group standards, and promote the transformation of standard supply in the coal field to the government and the market.

Adhere to the clean, low-carbon, green, safe, intelligent, efficient, diversified and coordinated high-quality development path.

The goal of carbon neutrality at the peak of carbon dioxide emission puts forward new requirements for the development of coal industry, but "double carbon" is not simply "de-coalification". The clean and efficient utilization of coal can provide a foothold for China's energy transformation and play an important supporting role in the future energy structure transformation.

The coal industry must adhere to the high-quality development path of clean, low-carbon, green, safe, intelligent, efficient and multi-coordinated, constantly create a model of "ecological harmony" in mining areas, and build a multi-ecosystem of mountains, rivers, forests, lakes, grasses and sands in mining areas; Continue to expand the clean consumption space of coal and promote the high-end, diversified and low-carbon development of coal chemical industry; Accelerate the intelligent construction of coal mines, focus on improving the safety production level of coal mines, and let more development achievements benefit the majority of miners; Based on the basic national conditions of coal, accelerate the flexible transformation of coal and electricity, and promote the optimal combination of coal and new energy.