A method for reconstruction of internal drainage strata in open-pit mines by increasing soil moisture content and quickly fertilizing

Abstract

The invention discloses an open-pit mine internal drainage stratum reconstruction method for rapid fertilization by increasing the soil moisture content. In the internal dump site, a soil layer, an aquifer, a water-repelling layer, and a conventional soil drainage layer are sequentially arranged from the surface downwards. A number of water collection channels are laid horizontally at intervals in the soil layer, and the top surface of the water collection channels is exposed to the surface. A plurality of water diversion blind alleys are horizontally laid at intervals in the soil layer. The water blind alley intersects with the water collection canal, and a water guide blind alley is divided into multiple sections by multiple water collection canals; the fertilization and water replenishment seepage pipe is laid inside the water collection canal, and the laying direction of the fertilization and water replenishment seepage pipe is the same as that of the water collection canal. Fertilization and water replenishment wells are arranged longitudinally in the initial section, and the fertilization and water replenishment wells are connected with the seepage pipes for fertilization and water replenishment. The invention reduces the evaporation of soil moisture, increases the rainfall infiltration, can realize rapid fertilization and water replenishment under the condition of weak ecological self-repair ability in the early reclamation stage of the inner dump site, saves reclamation cost and improves the survival rate of vegetation.

Description

technical field [0001] The invention relates to a stratum reconstruction method, in particular to a stratum reconstruction method in an open-pit mine for rapid fertilization by increasing soil moisture content. Background technique [0002] Due to the impact of open-pit mining, the water level of the original aquifer around the mine pit has dropped, and the reconstructed strata cannot be replenished horizontally by the water source of the original stratum in time, and the moisture content and fertility of the reconstructed soil layer have decreased after transportation and stockpiling, resulting in soil discharge in the open-pit mine. At the initial stage of field reclamation, the soil moisture content is low, the ecological self-repair ability is weak, and the survival rate of vegetation is low, which increases the difficulty of reclamation. The traditional reclamation process requires manual watering to increase the soil moisture content. However, due to the large amount o...

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Problems solved by technology

[0002] Due to the impact of open-pit mining, the water level of the original aquifer around the mine pit has dropped, and the reconstructed strata cannot be replenished horizontally by the water source of the original strata in time, and the moisture content and fertility of the reconstructed soil layer have decreased after transportation and stockpiling, resulting in soil discharge in the open-pit mine. In the initial stage of field reclamation, the soil moisture content is low, the ecological self-repair ability is weak, and the survival rate of vegetation is low, which increases the difficulty of reclamation

The traditional reclamation process requires artificial watering to increase the soil moisture content, but due to the large amount of evaporation caused by the climate, the water replenishment effect is not significant, and the problem cannot be fundamentally solved. In addition, manual watering and fertilization requires a lot of manpower and material resources, which increases the cost of reclamation

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