Method for filling open stope with aeolian sand in shallow coal seam in western desertified mining areas

摘要

Provided is a method for filling an open stope with aeolian sand in a shallow coal seam in western desertified mining areas, which is suitable for a coal mining face having a better roof self-stabilization and being capable of forming an open stope of a certain size in the rear portion. By using the features of a small amount of work involved in drilling from the earth surface to the shallow coal seam and a good self-flowing performance of aeolian sand, drilling arrangement is conducted above an open stope (9) formed after a coal mining face (8) is mined, and the open stope is directly filled with aeolian sand, and is filled in stages prior to underground periodic weighting such that filling the open stope with aeolian sand is achieved. Because the western coal seam is shallowly buried and has a thick overlying loose layer and a thin bedrock, the amount of work involved in drilling is small, the cost is low, and the construction cycle is short. Moreover, the problems of overlying rock destruction and earth surface subsidence can be effectively solved, and inrushes of water and sand are relieved, improving the environment of the western mining areas. A new technical approach is created for green mining in the western desertified mining areas of our country, and has a high production efficiency, less equipment investment and a low filling cost.