Mechanical ventilation

...In the paired type, the air inlet and exhaust entrances are located apart, so the air flows in one direction from the air inlet tunnel to the face to the exhaust tunnel, and there is little risk of the air flow short-circuiting. The driving force behind ventilation is the difference in air pressure. When the natural pressure difference caused by the temperature difference inside and outside the mine is the driving force behind ventilation in the mine, this is called natural ventilation, and when a pressure difference is artificially created by a fan to ventilate the mine, this is called artificial ventilation (mechanical ventilation). The usual method of mechanical ventilation is to install a fan at the exhaust entrance and use the negative pressure (pressure below atmospheric pressure) generated by this fan to suck out the air from inside the mine. ...

*Some of the terminology that refers to "mechanical ventilation" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…対偶式では，入気坑口と排気坑口とを離して設けるので，気流は入気坑道→切羽→排気坑道と一方向に進むので気流の短絡する危険が少ない。通気を起こさせる原動力は気圧差であり，坑内外の気温の差があるために自然に生ずる圧力差が坑内通気の原動力となる場合を自然通気といい，扇風機によって人工的に圧力差をつくって坑内通気を行う場合を人工通気(機械通気)という。機械通気方法としては，扇風機を排気坑口に設置して，この扇風機によって生ずる負圧(大気圧以下の気圧)で坑内の空気を吸い出すようにするのが普通である。…

※「機械通気」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報