Roadway forming method by expanding excavating and filling gangue paste in thick coal seam

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

• a. designing a width of a filling strip and a width of a new excavation roadway according to a geological condition of the thick coal seam;
• b. determining a cyclic filling interval as a length of each filling;
• c. after the new excavation roadway is excavated for the cyclic filling interval, starting to perform the expanding excavation along an outer side of the new excavation roadway to generate the filling strip;
• when the new excavation roadway is excavated, using a bolt and a bolt-mesh-cable as a support to support a roof, a floor and an inner side of the new excavation roadway;
• when the expanding excavation is performed, using a single hydraulic prop in cooperation with a metal articulated roof beam as a temporary support to support the filling strip formed and a junction of the filling strip and the new excavation roadway;
• d. after the expanding excavation is completed, removing the temporary support 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 the gangue paste to the filling strip;
• and
• e. performing steps a-d repeatedly;
• wherein the thick coal seam refers to a stable coal seam has a thickness of greater than 3.5 m and less than 10 m when underground mining, an inclination angle of less than 12 degrees, and has no fault.