With the continuous development of coal resources, some coal mines have reached their life cycle, and some coal mines that are behind the production capacity do not meet the requirements for safe production, or have high mining costs and serious losses, and are facing closure or abandonment. The national coal-to-capacity policy implemented since 2015 has promoted structural reforms in the energy supply side, prompting the closure of a number of resource-exhausted and outdated mines and open pits.
After coal mines are shut down or de-capacity, they still have a variety of available resources, such as underground space, water, coal and associated resources, and land.

If the underground space of a single coal mine is calculated to be 600,000 cubic meters, by 2020, the underground space for underground mines in China will be about 7.2 billion cubic meters; by 2030, it will be about 9 billion cubic meters. It is estimated that the current reserves of coal reserves in coal reserves up to 42 billion tons, nearly 500 billion cubic meters of unconventional natural gas, and also has a wealth of mine water, geothermal, space, land and tourism resources.
"As an example of Anhui's Lianghuai Mining Area, by the end of 2018, there will be 20 capacity reductions and closures of mines. The remaining coal resources of these mines amount to 1.53 billion tons, and the coalbed methane resources amount to 47.6 billion cubic meters. 2.3 billion cubic meters per year, and the area of minefield is 56 million square meters."

The top priority is to change the way of thinking and integrate the capacity-reducing mine into regional economic and social development.

Despite the huge potential for the closure of coal mine resources, Yuan Liang expressed his concern that there is a general phenomenon of direct closure and one-off of the de-capacity coal mines. Direct closure of coal mines not only results in huge waste of resources and loss of state-owned assets, but also may induce Mine safety, environmental and social issues.

"If we can do a good job of developing and using this coal mine resource, we will have great practical significance and far-reaching historical significance."

For coal companies, the most pressing task is to change the way of thinking: in the past, it was only to dig coal. In the future, it may consider developing capacity-reducing mines to develop resource potentials such as water, coalbed methane, underground space, and industrial tourism. In the past, only the energy attributes of coal were emphasized. In the future, equal attention should be paid to the multiple attributes of coal's material properties, and the advantages of resources should be transformed into economic, environmental, and technological advantages.
"This can indirectly promote coal production." The combination of underground and above-ground resources can be used to ensure safety through the combination of underground and above ground. He suggested that the development and utilization of de-capacity mine resources be incorporated into the regional economy and Deploy and plan scientifically in social development, grasp the challenges and opportunities for development and utilization of mines with capacity for exploitation, and achieve sustainable development in the full life cycle of resource-accurate development, scientific closure and disaster management, comprehensive utilization of capacity-reduction resources, and restoration and beautification of the ecological environment. .
"It is proposed that the government authorities should take the lead and relevant departments should assist and establish a national inter-departmental coordination group for the exploitation and utilization of mine space resources. Conduct a systematic survey of the basic information on the distribution and quantity of underground space resources for de-capacity mines, and propose that the mines can be used for capacity removal. Detailed data on space resources provide support for national decision-making."

At the same time, policies and management measures were adopted to support the development and utilization of coal resources at the production capacity, simplifying the approval process, and tilting the development and utilization projects of de-capacity mines on the basis of approval index allocation and filing procedures. We will carry out research on various supportive policies such as industrial financial subsidies, tax reduction and exemption, and special funds for the development of mines with capacity for exploitation.

Considering that the Lianghuai Mining Area has superior geographic location, developed transportation, and rich coal resources, it is the largest fully equipped coal field in East China, and the state has approved the development of the Huaibei Huai Mining Area as the first batch of demonstration projects for the development and utilization of coal resources for capacity reduction. Try to provide experience for similar mining areas throughout the country.

"At the time of operation, six resources, namely space resources, water resources, coal resources, unconventional natural gas (AMM), land resources, and tourism resources can be systematically developed and utilized.

The use of space resources includes the construction of underground oil and gas reservoirs, the construction of underground distributed pumped-storage power stations, the development and utilization of resources for the depletion of deep open-pit space resources, and the construction of a national-level scientific platform for underground space.