Where deposits are very flat, under 20°, and walls fairly sound, it is often possible to use a sort of long wall system of stoping and to lay tracks in the stopes with self-acting inclines to the levels.
Where values fade into the walls, as in impregnation deposits, the width of stopes depends upon the limit of payability.
A longitudinal section of the mine showing a continuous shortening of the stopes with each succeeding level carries its own interpretation.
In the Ivanhoe mine of West Australia the cost of filling stopes with tailings is about 22 cents per ton of ore excavated.
Where stopes are wide, ore is sometimes cut arch-shaped from wall to wall to assure its standing.
When the ore from the first group of alternatestopes (ABC, Fig.
The plan of contracting stopes by the ton has the disadvantage that either the ore produced by each contractor must be weighed separately, or truckers must be trusted to count correctly, and to see that the cars are full.
In widestopes with machine-drills they vary from 7 to 10 feet; in narrow stopes with hand-holes, from two to three feet.
An equilibrium is ultimately established in a mine worked on this system when a certain number of stopes full of completely broken ore are available for entire withdrawal, and there is no further accumulation.
The increased difficulty in setting up machine drills in such stopes adds to the breaking costs,--often enough to warrant another method of support.
In mines where the ore is broken on to the top of stopes filled with waste, there is some loss underground through mixture with the filling.
Stopes opened in this manner when partially empty are too dangerous for men to enter for shoveling out remnants.
If the ore was mainly overhead it was overhand-stoped, and the stopes filled as work progressed, inclined winzes being occasionally driven from the stopes to the original entry drives.
Stopes harps on the religious and praiseworthy Dr.
Stopes to the British Medical Journal, in which she made the following statement: "Dr.
Stopes points out that there was a Neo-Malthusian movement prior to 1876.
Stopes maintains that artificial birth control was not an atheistic movement, whereas Dr.
Stopes has written a lucid and serviceable introduction on the 'No' plays, which deserve the study of every student of the drama.
Stopes has placed the English reader under a debt of gratitude by her work on these exquisite lyric plays.
Stopes has made the 'No' and their history for the first time accessible to the ordinary reader .
Stopes The Diary of a year and a half's travel into the wilds of Japan, as well as of sojourn in its capital The Spectator says: "A most interesting and illuminating work.
Few, if any, partisans of Will agree with Mrs. Stopes (herself no Baconian) about the history of the Stratford monument of the poet.
Mrs. Stopes herself discovered the documents which disprove her theory.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "stopes" in a variety of sentences. We hope that you will now be able to make sentences using this word.
