Hydroseeder for mine rehabilitation
2022-10-15 16:29:50
Mine greening and mining area restoration is to restore the pollution of mining waste land and realize the reuse of land resources. In the process of mining, a large amount of land that cannot be used without treatment will be generated, also known as mining waste land. There are various pollutions caused by production in the waste land.
Abandoned mine land refers to untreated land that has been destroyed during mining or quarrying.
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Classification:
1. Waste rock accumulation site formed by stripped topsoil, mined rock fragments and low-grade ore.
2. The mining wasteland formed by the goaf and the subsidence area left after the ore body is mined.
3. The tailings wasteland formed by the accumulation of tailings after the mining of ore concentrates.
4. Land that is first occupied and then abandoned, such as mining operation surface, mechanical facilities, ore auxiliary buildings and road traffic.
Most of the mining wasteland is mainly polluted by heavy metals and acid drainage of mines, and the treatment content is mainly ecological restoration and pollution control. Mine pollution remediation is constrained by factors such as topography, climatic characteristics, hydrological conditions, soil physical, chemical and biological characteristics, topsoil conditions, and potential pollution. Therefore, the selection of remediation technologies and implementation plans needs to consider the influence of various factors.
1. Treatment measures for slopes
The main task of slope management is to stabilize the slope. The task of this process is to remove dangerous rocks, reduce slopes and cut slopes, make the cliffs without steps as much as possible to form horizontal steps, and reduce the slope of the side slopes to below a safe angle, so as to eliminate the hidden danger of collapse. Afterwards, the treated slope should be regreened to further stabilize it.
2. Control measures for tailings
Carry out secondary development of tailings that occupy a large amount of land to increase the comprehensive utilization rate of tailings; develop tailings with large consumption, low investment, and marketable tailings to realize large-scale operation and multi-variety development of resources and commercialization to make them waste. For the treasure, it truly becomes a part of the economic commodity. The wastewater in the tailings dam should also be treated to meet the standard, so as to realize the reuse and zero discharge of the flotation wastewater after moderate purification. For mines with untreated goafs, abandoned roadways and chambers, the use of underground goafs to discharge tailings is a way to dispose of tailings.
3. Soil base improvement
The key to ecological damage caused by mining is land degradation, that is, the change of soil factors, that is, the deterioration of soil physical and chemical properties, the loss of nutrients and the increase of toxic and harmful substances in the soil. Therefore, soil improvement is one of the important links in the ecological restoration of mine abandoned land. The measures that can be taken include: (1) Measures for taking soil from different places: on the premise of not destroying the soil in different places, take an appropriate amount of soil, move it to the seriously damaged part of the mine, and plant plants on the soil, through the absorption, volatilization and root of the plants. It can repair damaged soil by filtering, degrading and stabilizing. (2) Reconstruction measures of waste land Before performing topsoil renovation, try to pour mud to make it wrap the waste residue, and then lay a layer of clay to compact it to create an artificial water barrier, reduce the seepage of water on the ground, and prevent the highly toxic elements in the waste residue. freed. (3) Soil enhancement and improvement measures: Add substances to improve the physical and chemical properties of the soil, thereby shortening the vegetation succession process and speeding up the ecological reconstruction of mine wasteland.
4. Phytoremediation of heavy metal pollution in mines
Heavy metal-tolerant plants can not only tolerate the toxicity of heavy metals, but also adapt to harsh environments such as barren wasteland and poor soil structure. Considering the ecological problems that may be caused by introduction, and the adaptability of native plants to local climatic conditions, it is necessary to screen heavy metal tolerant plants based on the locality.
5. Restoration of mine water resources
The damage to water in mining is manifested in the impact on surface water and groundwater, respectively. The pollution of surface water and groundwater can be removed by constructing artificial wetlands and by tolerant to the action of plants and microorganisms. On the other hand, there is a shortage of surface water and a drop in groundwater level caused by excessive water extraction. This requires proper water diversion to alleviate the pressure of water shortage and build a water storage system to gradually solve this problem.
6. Microbial remediation measures
The ecological restoration of the abandoned mine land is not enough to restore the soil and vegetation. It is also necessary to restore the microbial community of the abandoned land. Only by perfecting the functions of the ecosystem can the restored wasteland ecosystem be maintained naturally. Restoration of microbial communities not only restores the original community in the area, but also inoculates other microorganisms to remove or reduce pollutants. The inoculation of microorganisms can consider the following two: one is anti-pollution bacteria, some of these bacteria can use pollutants as their own nutrients, decompose pollutants into non-polluting substances, or convert high-toxicity substances into low-toxicity substances. The second is the microorganisms that help plants absorb nutrients. Some microorganisms can not only survive under high pollution conditions, but also provide nutrients for the growth of plants, such as nitrogen fixation, phosphorus fixation, and improve the microenvironment. The damage to the ecological environment of mines in my country is relatively complex. To curb the further deterioration of the ecological environment of mines, it is necessary to establish a multi-disciplinary team based on the actual situation of my country's ecological environment construction.
The channel input mechanism can promote the development of the restoration and management of the mine ecological environment, prevent the increase of new pollution and damage, and gradually restore the good state of the mine ecological environment.
If you are interested in the hydroseeder for mine re-greening, please contact us! Email: info@gaodetec.com, and we will send the hydroseeder price and more details for you!
