关键词: 露天矿山, 多区段开采, 内部排土, 绿色开采, 近自然修复

Abstract: In order to help the green and low-carbon transformation of mining industry and the con‐ struction of ecological civilization，and explore the effective way to realize ' mining without marks' in open-pit mines，a large open-pit building material mine in the south is taken as the research object. In view of the problems of large transportation distance，large land acquisition and difficult ecological restora‐ tion in the traditional mining process under the constraints of complex environment，the near-natural resto‐ ration technology of green mining with multi-section mining-internal dumping-slope dumping restoration is innovatively applied. The core of this technology is to optimize the development layout by synchronous mining and stripping in different zones，to reshape the internal dumping landform by using the goaf，and to construct the near-natural soil profile and vegetation community according to the principle of rock and soil reconstruction. The application results show that the multi-section mining shortens the infrastructure trans‐ portation road by 1.9 km，reduces the investment by 7.453 million yuan，and reduces the average annual transportation cost of the initial ore by 3.6 million yuan. The internal dumping reduces the average transpor‐tation distance of dumping by 8 km，saves an average annual freight cost of 6，392，000 yuan，and reduces the land acquisition cost of 31.69 million yuan. The inner dump covered the high and steep slope of the stope by 7.99 × 105 m2 ，increased the afforestation area by 7.99 × 105 m2 ，and reduced the cost of ecologi‐ cal restoration by 6.1472 million yuan. After the restoration，the topography of the first mining area is inte‐ grated with the surrounding natural environment，which effectively eliminates the mining traces. This tech‐ nology reduces carbon emissions through green mining，enhances carbon sink capacity through near-natu‐ ral restoration，and achieves synergistic improvement of economic and ecological benefits，which can pro‐ vide reference for similar building materials mines.

Key words: open-pit mine, multi-section mining, internal dumping, green mining, near-natural res‐ toration