The hazards of abandoned mines

3. Solid waste pollution

In the open pit mine near the scenic spot, due to the damage of mining to the ground landscape, the tourism environment is extremely uncoordinated, and many mines dump solid waste at will, resulting in gullies and rivers silting, poor flood discharge, and constant flooding

4. Land destruction, restoration and soil pollution

Mining, especially open-pit mining, has resulted in the destruction or occupation of large areas of land. According to statistics, there are about 15,000 open pit mines in the United States, destroying more than 30,000 hectares of land every year. In the Federal Republic of Germany, lignite mining alone covers an area of about 21,000 hectares per year. The total amount of land destroyed by mines in China has not yet been detailed national statistics, according to the preliminary information, there are more than 1000 major types of open pit mines, most of which belong to small open pit mines, and the damage to the land is very considerable.

5. Geological disasters

Ground and slope excavation affect the stability of the mountain, and lead to rock (soil) deformation inducing collapse and landslide and other geological disasters. The waste rock (slag) discharged from the mine is often deposited on the hillside or gully, and it is easy to cause debris flow when the rainstorm occurs.

Because the abandoned mining land has many bad physical and chemical properties, especially the heavy metal content is too high, and the pollution process of toxic heavy metals in the soil system is hidden, long-term and irreversible, so it often causes a great impact on the ecological environment of the surrounding area. Such as: destruction of land resources, resulting in the deterioration of the ecological environment; Destroy water balance and aggravate water resources crisis in mining area; Pollute the environment and endanger human health; Destroy the ecological balance of biological community and biodiversity.

Because the mining wasteland has many undesirable physical and chemical properties, especially the high content of heavy metals, the pollution process of toxic heavy metals in the soil system is hidden, long-term and irreversible, so it often has a significant impact on the soil system. The ecological environment of the surrounding area. The influence. Such as: destruction of land resources, resulting in the deterioration of the ecological environment; Destroy water balance and increase water resources crisis in mining area; Pollute the environment and endanger human health; Destroy the ecological balance and biodiversity of the community.