Method of forming a roadway by filling gangue paste during wide-roadway excavation of thick coal seam

A method of forming a roadway by filling gangue paste during wide roadway excavation of a thick coal seam, sequentially comprising the steps of:

• a. designing a width of a filing strip and a width of a new excavation roadway according to a geological condition of a coal seam;
• b. determining a length of each filling, i.e. a cyclic filling interval, according to an existing excavation technical condition of a mining shaft;
• c. after the new excavation roadway is excavated for the cyclic filling interval, starting to perform roadway-expanding excavation along an outer side of a roadway;
• when the new excavation roadway is excavated, performing supporting for a roof, a floor and a an inner side of a roadway by using “bolt+bolt-mesh-cable”;
• when roadway-expanding excavation is performed, performing temporary supporting for a formed filling strip and a junction of the formed filling strip and the new excavation roadway by using a single hydraulic prop in cooperation with a metal articulated roof beam;
• d. after roadway-expanding excavation is completed, removing temporary supports and constructing an isolation wall with a double-layer plastic woven fabric at a side of the filling strip;
• after the isolation wall is constructed, filling the filling strip through a filling pipeline, wherein the filling pipeline transports gangue pastes to the filling strip for filling;
• and
• e. performing steps a-d alternately;
• wherein the thick coal seam refers to a stable thick coal seam that has an inclination angle of less than 12 degrees, is stable in coal seam thickness and has no large fault.