pillar line

pillar line

[′pil·ər ‚līn]
(mining engineering)
Air currents which have definitely coursed through an inaccessible abandoned panel or area or which have ventilated a pillar line or a pillar area, regardless of the methane content, or absence of methane, in such air.
References in periodicals archive ?
Just one fatality has been recorded as a result of a pillar line roof fall since 2007 (when six miners and three rescuers were killed at Crandall Canyon), and Gauna and Mark examined the process that helped the industry mark the historic achievement that included the implementation of insights that have been discovered particularly since the turn of the new century.
According to sources at Hyundai India, the rear door design will be the same as the Grand i10 and the pillar line will start slim from the top of the door and thicken as it reaches the boot lid.
Hanna's Candles currently offers poured container candles and votives, and the company is creating a pillar line.
It is even more important when it comes to determining the abutment pressures in and around the longwall faces and the pillar lines in room-and-pillar mining with pillar extraction.