N00 mining method adopting mode of top cutting for filling

Abstract

The invention relates to an N00 mining method adopting a mode of top cutting for filling. The problems in the prior art that the structure stability of a stope is poor, the earth surface sinks and isdeformed, and gangue is stacked on the earth surface are solved. The N00 mining method is characterized in that a plurality of mining work surfaces are arranged in a brand new panel, no-roadway tunneling is adopted, and in the mining process, gob-side entry retaining is achieved; after 10 m of the coal layer is mined completely, the immediate roof is mined, the width of the mined immediate roof is7 m, after one-time roof cutting, a roof cutting area is formed, and then roofs of the roof cutting area automatically fall for filling; mining continues forward by adopting the work surfaces, a newgoaf is filled with broken rock stored in a temporary storage chamber and gangue on the earth surface, the roofs of the roof cutting area fall for applying constraint to the two sides. The method improves the mining efficiency, resources are saved, subsidence is effectively controlled, transportation of gangue under a well is reduced, the gangue is directly utilized under the well, the problem ofaccumulating of the gangue on the ground is solved, and the method can be widely applied to the technical field of filling and mining for coal mines under wells.

Description

technical field [0001] The invention belongs to the technical field of coal mining and relates to an N00 mining method suitable for coal mining in my country, in particular to a top cutting and filling N00 mining method. Background technique [0002] At present, there are several ways to control surface subsidence in my country, such as strip mining, paste filling, overlying rock separation layer grouting, and mechanized gangue filling technology after efficient erection of fully mechanized mining face. Strip mining is one of the effective methods to reduce surface deformation, but the recovery rate of strip mining is only 40% to 60%, and the waste of resources is serious. Although paste filling can effectively improve the recovery rate of pressed coal under the village, the cost of filling is increasing and the process is more complicated, which is difficult to meet the needs of efficient production. Overlying rock detachment layer grouting controls surface deformation by ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of poor stope structure stability, surface subsidence deformation, and surface gangue accumulation in the prior art, and to provide a top-cut and filling N00 mining method that can effectively solve surface gangue accumulation and control surface mining subsidence

Images