METHOD FOR COAL MINING WITHOUT RESERVING COAL PILLAR AND TUNNELING ROADWAY IN WHOLE MINING AREA

WIPO Patent Application WO/2021/003772

A1

A method for coal mining without reserving a coal pillar and a tunneling roadway in a whole mining area, comprising the following steps: opening a main shaft (1), an auxiliary shaft (2), and a return air shaft (3) from the ground to a coal seam; forming a first mining face (4) with a first direction as the travelling direction by means of a coal mining machine; when the coal mining machine cuts a coal wall on the first mining face (4), cutting out a first transportation roadway (5) and a first ventilation roadway (6), and reserving the first transportation roadway (5) and the first ventilation roadway (6) which are located on two sides of the first mining face (4) respectively, wherein the first transportation roadway (5) is communicated with both the main shaft (1) and the auxiliary shaft (2), and the first ventilation roadway (6) is communicated with the return air shaft (3); and when the coal mining machine cuts the coal wall on a second working face (9), cutting out a second transportation roadway (10) and a second ventilation roadway (11), and reserving the second transportation roadway (10) and the second ventilation roadway (11) which are located at two sides of the second working face (9) respectively.

HE MANCHAO (CN)
GAO YUBING (CN)
FU QIANG (CN)
WANG YAJUN (CN)

PCT/CN2019/097066

January 14, 2021

July 22, 2019

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BEIJING ZHONGKUANG INNOVATION ALLIANCE ENERGY ENV SCIENCE ACADEMY (CN)

E21C41/18; E21D9/14

CN105240013A	2016-01-13
CN106121646A	2016-11-16
CN105089668A	2015-11-25
EP2801697A1	2014-11-12

See also references of EP 3998394A4

BEIJING LONGAN LAW FIRM (CN)

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