On February 20, it was learned from Yunfu Natural Resources Bureau that Yunfu Natural Resources Bureau entrusted Yunfu Natural Resources Comprehensive Service Center to organize experts to evaluate the Geological Environment Protection and Land Reclamation Scheme for Building Granite and Metamorphic Sandstone Mines in Chongwangling Mining Area, Yunan County, Guangdong Zhongdian Construction (Yunfu) New Materials Co., Ltd. The evaluation result is passed. It is reported that the mining right was won by China Electric Power Construction (Yunfu) New Materials Co., Ltd. on October 18, 2022.
It is understood that the mine is located in Guiwei Town, Yunan County, Yunfu, with a total investment of 17.46 billion yuan, a recoverable reserve of 535 million cubic meters and a designed production capacity of 54.2 million tons per year. Its main products include sand and stone aggregate for construction, backfill stone, granite sand and siliceous raw materials for cement, etc. Processing equipment includes gyratory crusher, cone crusher and vibrating screen, etc. After completion, the annual output value is 4 billion yuan, which can contribute about 300 million yuan to local tax revenue every year. After on-site inspection and meeting review by
experts, the expert group reviewed the geological environmental impact assessment, land damage assessment, feasibility and measures of mine geological environment control and land reclamation, geological environmental protection and land reclamation work deployment. In terms of the scope and grade of
mine geological environmental impact assessment, the expert group said that the scope of mine geological environmental impact assessment includes the scope of mining area and the scope of mining activities, with a total area of 317.2948 hm2. In view of the large scale of mine production and construction, the importance of the assessment area is an important area. The complexity of the geological environmental conditions in the assessment area is of medium type, and the level of the mine geological environmental impact assessment is determined to be the first level, which meets the relevant technical requirements.
In terms of land damage assessment, the expert group said that after on-site investigation, the area of damaged land in the project area was 0 hm2, and the area of land to be damaged was 317.2948 hm2. The objective of land reclamation is based on the current situation drawings of the project area and the prediction of damaged land, and the land reclamation area and the scope of reclamation responsibility are 317.2948 hm2. Among them, 0.2076 hm2 of paddy field, 19.5339 hm2 of garden plot and 297.5533 hm2 of arbor forest land were reclaimed, and the reclamation rate was 100%. The prediction and assessment of land damage are basically reasonable.
In terms of the feasibility and measures of mine geological environment control and land reclamation, the expert group said that the Plan analyzed the feasibility of mine geological environment control from the aspects of technology, economy and ecological environment coordination, and analyzed the feasibility of land reclamation in the mining area from the aspects of land use status, land reclamation suitability and water and soil resources balance. Mine geological environment prevention and control measures mainly include standardizing mining activities, building intercepting and drainage ditches, covering soil, land leveling, vegetation reconstruction, mine geological environment monitoring, etc. Land reclamation measures mainly include soil reconstruction, land leveling, biochemical engineering, supporting engineering and monitoring, etc. Geological environment control and land reclamation measures are basically feasible.
In terms of the deployment of geological environmental protection and land reclamation work, the expert group said that according to the principles of "giving priority to prevention, combining prevention with control" and "harnessing while mining, advancing step by step". Engineering measures, biological measures and monitoring measures are combined to carry out engineering deployment: firstly, different geological environment problems are proposed to take measures with different emphases; secondly, the main prevention and control measures for each prevention and control zone are proposed; thirdly, the corresponding treatment and land reclamation deployment are made according to the applicable years of the scheme and the mining progress. The work deployment and reclamation measures are basically feasible.
In addition, the expert group also gave suggestions on the division of the boundary of the open-pit mining area and the contingency plan of the mine.
(1) Further improve the basic data, including the surface catchment and drainage conditions of the assessment area, the structural conditions in the area, the slope conditions, etc.; further improve the debris flow assessment content, and analyze its impact scope and degree; further clarify the scope of land ownership.
(2) Further improve all kinds of monitoring measures; further optimize the layout of each restoration land type; land reclamation should be combined with geological environment management and complement each other.
(3) The classic case analysis is not representative, and the mine reclamation of the same type and the same development and utilization mode should be selected for comparison one by one.
(4) It is suggested to adopt the "trichotomy" to divide the prediction zoning of mine geological environment impact.
The open pit (within the boundary of the mining area) is divided into the serious area, the industrial site in the periphery of the mining area, the living service area and other ancillary facilities, and the site is divided into the more serious area, and the area outside the serious area and the more serious area is divided into the lighter area.
(5) As the open-pit mining scope of the mine is relatively large, the preparation unit shall fully communicate with the mining enterprise, and propose the corresponding relationship between the implementation plan of each stage (short-term, medium-term and long-term) and the changes in the mining elevation and scope of the district, so as to facilitate the supervision and inspection of the competent department in accordance with the Plan.
(6) It is suggested that the mining enterprises should do well in the relevant contingency plan: constantly standardize and optimize the mining scheme, and the monitoring, protection, control and land reclamation of the geological environment should run through the whole process of mine production.
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