ventilating shaft

Study on tech. of ventilating shaft protection pillar mining under complicated condition at Lincheng Coal Mine

临城矿复杂条件下开采风井保护煤柱技术研究

Technological Transformation of the Ventilating Shaft of the Colliery to Promote Systematic

兴无煤矿风井提升系统的技术改造

Design on the structure of wall of well of the ventilating shaft in the goaf and subsidence area

采空塌陷区风井井壁结构设计

It is indicated that the suction of air from the emergency ventilating shaft is the reason to cause the harmful hydraulic vibration .

研究表明，事故门井卷吸空气，形成明满交替流是造成一系列不良水力现象的前提。

The design principle and method of ventilating entry and shaft used specially in mine

矿山专用通风井巷的设计原理与方法