Compared to the dust accumulation at zero tilt angle, the dust accumulation on PV2, PV3, and PV4 can increase by up to 50%, 200%, and 275%, respectively,” the academics said.

Tunnel workers are exposed to high levels of ... to levels of toxic dust well above the regulatory levels. As well as dust control, implementing modern systems of disease detection and centralised ...

Device that attaches to fire hose can provide quick, targeted suppression of flames or dust, its inventor says. Its inventor says the Aqua Blaster has been constructed and equipped to deliver water, ...

The tunnel goes through Gauley Mountain between ... such as proper ventilation, dust control and limited breathing protection. One preventative method for the dust was wet drilling, but the ...