Permian system coal mining sinking dust and mudstone layer weathering area paddy field water leakage repair method

Abstract

The invention provides a Permian system coal mining sinking dust and mudstone layer weathering area paddy field water leakage repair method. The method comprises: (1) using a traditional plough for paddy field to plough once in a dry mode and filling water to soak the field; (2) evenly spreading paddy field soil anti-seepage water-retaining agent powder on the surface of the field according to a standard of 250 kg / hm <2>; and (3) turning the paddy field by the traditional plough, enabling the water-retaining agent to be turned in soil by the plough, and enabling the depth of turning plough to be 20 to 30 cm and the times to be 3 to 5 times, or (2) turning the paddy field by the traditional plough, and enabling the depth of turning plough to be 20 to 30 cm and the times to be 3 to 5 times and (3) evenly spreading paddy the field soil anti-seepage water-retaining agent powder on the surface of the field according to the standard of 250 kg / hm <2>. The repair method can play roles of supplying water, retaining water, supplying fertilizer, retaining fertilizer, conserving soil moisture, improving soil structure and environment, saving cost and promoting production of plants, and can be widely used in southwest mountainous region coal mining sinking area Permian system dust and mudstone layer weathering area water leakage paddy field so as to improve the conditions of water leakage and fertilizer leakage.

Description

technical field [0001] The invention relates to a method for repairing water leakage in paddy fields, in particular to a technical method for repairing water leakage in paddy fields by combining traditional paddy plows and water-retaining agents. Background technique [0002] The karst mountainous area in Southwest my country is located in the center of East Asia, one of the three major karst development areas in the world. The karst landforms are widely developed, the terrain conditions are complex, and the ecological environment is fragile, especially in the Permian limestone and mudstone weathered areas, where karst fissures and joints are developed. , the surface soil is mostly composed of clay and gravel, and the soil layer is thin and barren. With the continuous increase of raw coal production in Southwest China, the area of ​​coal mining subsidence area is also expanding, and the geological structure joints of the subsidence area are damaged and formed under the influen...

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Problems solved by technology

[0003] The present invention is aimed at single repair measures for water leakage in paddy fields at home and abroad. The widely used water-retaining agent has limited effect and high cost in repairing water leakage in paddy fields. Deep infiltration, high cost, providing a comprehensive consideration of water supply, water conservation, fertilizer supply, fertilizer conservation, soil moisture conservation, improvement of soil environment, cost saving, promotion of production capacity, and improvement of economic benefits.

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