The hole has also been filled up with sand in some cases, according to Mr. Jessop's plan, instead of being packed with stones, which has removed the danger of the tamping operation.
In this state the cartridge is forced down to the bottom of the hole, which is then stuffed, by means of the tamping bar, fig.
Dry sand is sometimes used as a tamping material, but there are many rocks for the blasting of which it is ineffective.
It was laid with one edge on the plate, the other edge 3" above the plate; same tampingas above.
The cartridges are carefully rammed down by a wooden tamping bar and the remainder of the hole filled with tamping.
This allows the dynamite to spread under the pressure of the tamping bar.
This consists of finely broken rock, dry clay or other comminuted material, carefully compacted by the tamping bar on top of the charge.
Air jets are used for a variety of purposes ranging from tamping railway tracks to painting buildings.
When a track is depressed under the tamping action of trains passing over it the ties must be raised and new ballast introduced under them so as to bring them up to level.
As a rule, miners use far more tamping than is at all requisite.
The usual method of charging and tamping a hole in using the new system is shown in Fig.
The charge of powder is shown at C, the rod to sustain tamping at D, air space at BB, and tamping at A.
In the improved form of hole the tamping should not he put directly upon the powder, but an air space should be left, as shown at B, Fig.
The charge of powder is shown at C, the air space at B and the tamping at A.
The tampingis forced down with a stemmer or tamping bar similar to Figs.
The tamping end of the bar is grooved on one side, to admit of its clearing the pricker, or the fuse, lying along the side of the hole.
To lessen the danger of the tamping being blown out, plugs or cones of metal of different shapes are sometimes inserted in the hole.
All tamping should be selected for its freedom from particles likely to strike fire, but it must not be overlooked that the cause of such a casualty may lie in the sides of the hole itself.
If this could be easily effected, such a mode of placing the charge would be highly advantageous, as a very small bore-hole would be sufficient, and the difficulties of tamping much lessened.
A little wadding, tow, paper, or a wooden plug is sometimes put to lie against the charge before any tamping is placed in the hole.
With gelatine dynamites a firm tamping may be used, but with ordinary dynamite loose sand is better.
Tamping can be improved by jamming pieces of timber across the shaft or gallery among the other filling.
The absence of tamping in both cases of course placed the gunpowder at a disadvantage.
Of course, I don't mean to go tamping and blasting, but to see that the men did their work properly, that the stones were taken to the wharf, and generally to see to things when you were not there or wanted a rest.
Details of roof construction and forms of rafters] After tamping the uprights solidly, the corner posts for supporting the floor may be set in the ground.
The time spent in digging the holes and tamping the dirt around posts is well spent, as the pull on them is severe, and they must stand upright.
The machine is power operated and is carried on wheels that run on the side forms, and the machine moves slowly along as the tamping progresses.
Allowance must be made for the compression of the material by tamping so that a depression does not result.
Uneven places are repaired by first loosening the stone, then restoring the cross section by adding new material and tamping or rolling it in place.
If the area affected is small, tamping is satisfactory, and when the area is considerable, rolling is employed.
The British miners broke into an enemy's gallery in clay and struck the tamping of a charge they had laid and were holding ready to fire.
This tamping consisted of clay bags built up in galleries back of the charge in order to confine and intensify the explosion.
We decided to fire the charges at this point; so after collecting, with great care to avoid noise, a number of sand-bags filled with clay which the Germans had left in this gallery, we used these for tamping the charge and G.
We would notice some slight change in the timber at these places and invariably carefully withdraw this and the sand-bag tamping and take out the detonators and the high explosives.
The needle used in preparing a blast shall be made of copper, and the tamping bar shall be made of wood, or shall be tipped with at least five inches of solid copper.
Ten shots with charge as previously noted, in its original wrapper, shall be fired, each with 1 pound of clay tamping at a gallery temperature of 77° F.
At least 2 pounds of claytamping will be used with slow-burning explosives.
With dimensions much enlarged an air-driven piston becomes a rammer for foundry sand, for roads and pavements, for tamping the beds of railroads.
He was up on the high cliff, busily tamping the powder that was to blast out the side of the hill, and she waited patiently until he had fired it and come down the slope with his tools.
All right," he said lowering his powder down the hole and tamping it gently with a stick, "I see I can't scare you.
The theoretical length of the tamping was 25 metres.
The tampingwas effected with cement and with sandbags, with heavy wooden beams between the latter.
After many experiments it had been gradually borne in upon him that light but incessant and vigorous tamping in one spot was more effective than the heavy, battering strokes employed by the Italians.
From time to time, Challoner noted that the tamping was developing him too much on one side.
And all that day he worked--worked with his hands, and with his feet--worked with the gang tamping concrete.
At the same time, there was the standing objection to the mixture being too dry, namely, the responsibility of getting a sufficient amount of spading and tamping done.
Sometimes the car rolled in between long lines of men who were tamping gravel under the ties.
Tamping hard as clay, it had greater resilience, and soon the twisted track rose like a mained serpent from the slimy clutch of the devil.
It is well to test the planking as progress is made by tamping the sand on the bank side of the planks.
The tamping of the holes should be of the heaviest and stickiest clay that can be obtained, and this tamping should extend the entire length of the hole above the powder.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tamping" in a variety of sentences. We hope that you will now be able to make sentences using this word.
