Kind of no-pillar and gob-side entry retaining mining and construction method without the mining area division

A no-pillar and gob-side entry retaining mining and construction method without mining area division, which is characterized in that it comprises the following steps:

• first:
• construct main and auxiliary shafts at a upper boundary in a middle part of a mine, an upper main roadway along a seam at the upper boundary of the mine, a shaft station on a horizontal plane at an intersection of main and auxiliary shafts and the upper main roadway, a lower main roadway along the seam at a lower boundary of the mine, an inclined intake roadway in central part along the seam of the mine connecting with the shaft station and the lower main roadway and an inclined seam roadway at a boundary of the mine running through the upper and lower main roadways, forming a mine ventilation system that intakes air from the lower main roadway and returns air from the upper main roadway;
• arrange belt conveyors in the upper main roadway to form a coal transport system and assistant conveying devices in the lower main roadway and inclined intake roadway to form an auxiliary transport system;
• second:
• provide open-off cuts as the first mining face at the mine boundary of the upper roadway to carry out a downward inclined mining in the first mining face on the strike and along the inclination, during which a roadway shall be automatically formed (i.e. an inclined return roadway for transport) and a gob-side entry shall be retained to serve as the inclined return roadway for transport of an adjacent next mining face;
• third:
• after the downward inclined mining in the first mining face advances to the lower main roadway, move it to an open-off cut on its adjacent mining face, i.e. a second mining face open-off cut, to carry out upward alley;
• after the mining advances to the upper main roadway, move it to a next open-off cut on its adjacent mining face, i.e. a third mining face open-off cut, to repeat the downward inclined mining in the first mining face;
• after the mining advances to the lower main roadway, move it to the open-off cut on its adjacent mining face, i.e. a fourth mining face open-off cut, to repeat the upward alley in the second mining face;
• the mining of subsequent working face shall be carried out upward and downward in such a cyclic manner until one wing of the mine is completely mined.