Search U.S. government technical reports digitized or harvested by TRAIL.

Keyword Search

Some information from an investigation on methods of confining cardox blasting devices in boreholes in certain coal mines

Directionally controlled drilling to horizontally intercept selected strata, upper Freeport coalbed, Green County, Pa.

Probability of encountering coalbed discontinuities during vertical and horizontal borehole drilling

Published Year

• 1940-1949 (1)
• 1970-1979 (1)
• 1980-1989 (1)

Subject

• Boring (3) *
• Coal mines and mining (3) *
• Blasting (1)
• Methane (1)
• Mine gases (1)
• Mine ventilation (1)

Author

• Diamond, W. P. (1)
• Fields, H. H. (1)
• Griffith, F. E. (1)
• Houseknecht, David W. (1)
• Oyler, David C., (1)
• Seeling, C. H. (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

Search developed and maintained by the University of Washington Libraries
Copyright 2010