Design method of working face length of continuous separation grouting and filling mining without coal pillar

Abstract

The application discloses a coal pillar-free continuous separation layer grouting filling mining working face length design method, and specifically comprises the following steps: firstly, determining the basic parameters of the coal pillar-free continuous separation layer grouting filling mining working face length design; secondly, determining the design length of the coal pillar-free continuous separation layer grouting filling mining working face; thirdly, checking the design length of the coal pillar-free continuous separation layer grouting filling mining working face; and finally, determining and optimizing the length of the coal pillar-free continuous separation layer grouting filling mining working face. The application provides a direct and systematic working face length design scheme for the coal pillar-free continuous separation layer grouting filling mining conditions, takes into account the safety and economy of coal mining, ensures that the length of the coal pillar-free continuous separation layer grouting filling mining working face does not exceed the breaking distance of the key grouting layer, and meets the working face design production capacity, ventilation capacity and support strength, effectively prevents roof accidents and ventilation problems, improves the recovery rate of coal resources, and is beneficial to safe and efficient mining of the working face.

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