Multi-section non-pillar staggered protected roadway for deep inclined thick coal seam and method for coal pillar filling between sections

A multi-section non-pillar staggered protected roadway system for a deep inclined thick coal seam (DITCS), the multi-section non-pillar staggered protected roadway system comprising;

• a floor in a multi-section coal seam, being disposed below a coal seam;
• the coal seam in the multi-section coal seam;
• an immediate roof in the multi-section coal seam;
• a basic roof in the multi-section coal seam, wherein the floor is disposed below the multi-section coal seam;
• a hydraulic support being disposed in a space between the floor and the immediate roof;
• and
• a return airway and a transportation roadway being respectively disposed on a left side and a right side of the each section, wherein the return airway and the transportation roadway in the each section communicate with each other through a working face, wherein a non-pillar staggered layout is used for the return airway of a following section and the transportation roadway of a current section.