Reclamation method for sunk paddy field caused by mining in mountainous regions

Abstract

The invention relates to a reclamation method for a sunk paddy field caused by mining in mountainous regions and belongs to the technical field of improvement and utilization of environment, ecology and damaged fields. The method includes: performing topsoil stripping to fissured positions where fissures are created by mining sinking and lead to water leakage of the paddy field; covering water holding materials on fissured areas after topsoil stripping; compacting the covered water holding materials, pouring slurry and standing; performing topsoil backfilling and grinding to the fissured areas after slurry pouring and standing, and flattening to enable the fissured areas to be a whole with pieces of the paddy field around the fissured areas; and irrigating, nourishing and improving the paddy field after backfilling and grinding. By the method, the cultivation land where the fissures are created by mining sinking and lead to water leakage of the paddy field can restore the paddy field utilization mode and reach production level of a normal paddy field as soon as possible, a stable self-maintaining farmland ecological system can be formed, a paddy field protecting system can be formed, soil microbial content can be increased, physicochemical property of soil can be improved, and benign farmland ecological system circulation can be formed.

Description

technical field [0001] The invention belongs to the technical field of environment, ecology and abandoned land treatment and utilization, and in particular relates to a method for reclamation of cracks in paddy fields subsided by coal mining in mountainous areas. Background technique [0002] China's coal resources are mainly distributed in the central, eastern, and western regions. The coal resources in the southwest region are mainly distributed in Yunnan, Guizhou, Chongqing, Sichuan and other places. At the same time, the southwest region is one of the regions where rice is most widely distributed in China. Large coal-grain compound area. It is an indisputable fact that a large amount of cultivated land is occupied and destroyed during coal mining. The contradiction between national economic development and human survival requirements for food production inevitably appears in various coal-grain compound regions. Coordinating the contradiction between the two, while coal...

AI Technical Summary

Problems solved by technology

The invention can restore the use of the cultivated land damaged by the earthquake and reach a higher level of production as soon as possible, form a stable self-sustaining farmland ecosystem, increase the content of soil microorganisms, improve the physical and chemical properties of the soil, and form a benign farmland ecosystem cycle. However, there are obvious deficiencies in the application in coal mining subsidence paddy fields: for example, it is not involved in the reclamation of leaking paddy fields; it is not detailed enough in surface soil protection, etc.

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