Last year this Institute was good enough to accept some remarks by the writer regarding sound steel, entitled Plant for Hadfield Method of Producing Sound
In drilling for water and oil to reasonable depths through the generally soft yielding clay and sand formation of the Coastal Plain of Texas, Louisiana,
What is the difference between CWi and DWi: WiC measures fracture strength in coarse rocks, DWi measures matrix competence in medium-size rocks.
Stoping cost is one of the largest of the items comprising the total cost of producing ore. The cost per ton of ore mined is
Recovery and dilution usually are interrelated; with some methods of stoping a high recovery involves contamination of the ore from the walls or capping, and
The foregoing descriptions and discussion of the different stoping methods and practices and the accompanying tabulated data indicate the conditions under which they may be
To compare properly two different methods of mining, it is not wise to attempt to calculate the total cost of each, but rather to compare
Stope filling has been discussed by Jackson in an earlier paper. Filling long has been recognized as the most effective method of permanently supporting the
Drilling in stopes is done with pneumatic-feed stopers, light handheld hammer drills of the jackhammer type and heavier plugger machines, drifters of the Leyner type
Timbering in stopes ranges from occasional light props or stubs to temporarily support patches of unsafe ground to regular timbering with square sets and large