Patent AU-2020333932-B2 (AU)
Title: Tunneling-free and coal pillar-free mining and construction method wherein coal mine field is not divided into mining areas
Inventor: MA QIHUA
IPC: E21C41/18
Filed: 2020-03-24
Granted: 2022-04-21
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(54) Title: TUNNELING-FREE AND COAL PILLAR-FREE MINING AND CONSTRUCTION METHOD WHEREIN COAL 
MINE FIELD IS NOT DIVIDED INTO MINING AREAS 
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(57) Abstract: A tunneling-free and coal pillar-free mining and construction method wherein a coal mine field is not divided into 
mining areas. An upper main tunnel (1) and a lower main tunnel (2) are respectively arranged at upper and lower parts of a field, and a 
central air inlet inclined tunnel (15) is obliquely arranged at a central part. A first workface cutting hole (5) is arranged at the lower side 
of the upper main tunnel of a field boundary, a first workface (6) is arranged along the moving direction, and downward inclined mining 
is performed along the incline direction. The first workface is pushed downward to a lower boundary then moved to a cutting hole of 
- an adjacent replacement workface, to perform upward inclined mining to an upper boundary, and then moved again to a cutting hole 
of a next adjacent replacement workface, thereby moving up and down to perform cyclical pushing and mining. The method shortens 
the shaft depth, reduces the shaft construction period, and saves initial investment.  
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