pit prop BrE
mine prop AmE
stull

Another commodity associated with the mining industry was pit props.

Most pit props were made from the wood of spruce trees.

There was a good trade in sending wooden pit props to Wales.

With the decline of the mining industry, pit props are no longer imported.

The pit props and steel bands are not for show, but to hold up the mine roof.

She was carrying a cargo of magnesite and pit props.

The use of wooden pit props to support the roof was an innovation first introduced about 1800.

Pit props were the main export along with lime.

Pit props for the gold mines and raw material for paper.

Canada traditionally supplied pit props to the British market.

Recently dendrochronology had been employed to date the timber pit props.

Eventually, he ordered his troops to dig a tunnel under the south tower, which they held up with pit props.

No one looking after the pit props.

Then the Second World War came and stopped the free export of pit props.

At the workings you see them on all fours, skipping round the pit props almost like dogs.

The south-east corner of the keep was undermined and the pit props soaked in pigs fat.

You want them for pit props.

The company was to engage in trade in round timber, pit props and pulpwood.

It actually had its own siding until 1919 for the purpose of delivering pit props for nearby mines.

He purchased half a dozen landed estates in Saxony to supply timber for pit props.

The survivors were able to use the pit props as lifesavers as they awaited rescue.

It was used for industries from match making to house construction, from pit props to railway sleepers.

Its primary purpose was the export of coal, in the opposite direction pit props, as well as cut wood were transported.

Stakesby was carrying a cargo of pit props, destined for the Tyne.

Soesterberg was bound for Hull carrying 790 fathoms of pit props.

In fact, the Bralorne mines propped up an otherwise failing region.

Traffic was never heavy on the line, consisting of coal, mine props, and a little local freight and lumber.

The surrounding forest was cut so heavily for charcoal and mine props in the late 1800s that it is just now becoming productive again."

Lumber and mine props were supplied to build Colorado Springs and Denver.

An eightyfold increase in coal production led to the need for more lumber for mine props, timbers, and planks.

Because of its rot resistance, larch wood is especially valuable for posts, poles, railroad tie sleepers, and mine props.

Kahikatea make good mine props.'

He remembered the exceedingly durable mine props that Hamian had found solidly in place after who knew how many Turns.

A pit prop or mine prop (British and American usage, respectively) is a length of lumber used to prop up the roofs of tunnels in coal mines.

The additional cost of transfer between the Tuscarora Valley and the standard gauge Pennsylvania Railroad forced the lumber company to specialize in finished lumber, rather than lower-margin mine props.

Small lumbering operations in the hills surrounding the valley cut timber into mine props, barrel staves, railroad ties, tool handles, and other finished lumber, which was then hauled to the railroad and loaded on cars.

There it was loaded onto flatcars of the Virginia & Truckee Railroad which carried it to Virginia City for use in construction of the town, as mine props, and as boiler fuel.

"It should be pointed out," says Wernicke, the foreman, "that the eighth stall is the only one in our entire plant which, because of the continuous explosions, has to be secured against cave-in with three rows of the finest mine props."