pressure block

pressure block

[′presh·ər ‚bläk]
(mining engineering)
The pressure on pillars, walls, and other supports in a mine caused by removal of surrounding formations from masses of rocks or by natural geological formations.
References in periodicals archive ?
As shown in Figure 2(a), the intermediate principal stress applying system consists mainly of a hydraulic oil cylinder 6, a piston rod 7, a lateral pressure head 14, a guide pressure block 15, two pressure blocks 16, and three nitrile rubbers 18.
Second, the new Pressure Block (yellow components in the photo) is made of materials with low heat conductivity.
The new components consist of a 'Three Layer Tip', 'Pressure Block' and a 'Thread Safe Kit', each designed to either produce enhanced quality in the finished part, improve the processing of materials in the mould or make routine maintenance simpler.
That high pressure block now happens once or twice a year in August, September and October.
In the very cold winter we have just suffered there were days when they operated at only 1% owing to the high pressure block that caused the wind not to blow.
"The high pressure blocks any rain coming through and limits cloud growth.
Often during May and September you get a spell of east or south-easterly winds due to pressure blocks across Scandinavia, and some areas of Scotland tend to be sheltered, leading to longer sunnier periods."
On top of that, the high pressure blocks off the flow of cooler air from off the ocean and over the Coast Range.
In glaucoma, high inner-eye pressure blocks blood flow to the optic area and damages cells important to vision.
Then she constructed a complete loop between the respiratory block and pressure blocks. As she changed any of the partial pressures, that changed the respiration rate.