Modify Selection
- Mining types and methods:
- Hydraulic mining
Home Links
Results 1 - 2 of 2
-
1/1/1978 - Reports of InvestigationsThe Bureau of Mines examined the wellbore of a vertical gas drainage well in the Mary Lee coalbed to determine the results of specific completion procedures in coal. A jet-slotting tool was used to cut four vertical slots through the casing about 1 ft b...
-
1/1/1977 - Reports of InvestigationsIn studies conducted by the Bureau of Mines, two test areas were hydraulically stimulated and exposed by mining: one in the Pittsburgh coalbed at the Vesta No. 5 Mine, Washington County, Pennsylvania; and one in the Illinois No. 6 Coalbed at the Inland ...
Home Links
Content source: National Institute for Occupational Safety and Health, Mining Program