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Strengthening of Fractured Rock Pillars by the Use of Small Radial Reinforcement Pressures.

PB221901

Publication Date	1973
Personal Author	Brady, B. T.; Duvall, W. I.
Page Count	26
Abstract	Results of a study are presented of the effect of low radial reinforcement pressure on the post-failure characteristics of two types of granite, a sandstone and marble. The low radial reinforcement pressure is applied to the rock surface by a gooch rubber sleeve. The gooch rubber sleeve provides a radial pressure of less than one psi pressure to the rock surface. This method of support gives an average strength increase of approximately 8 percent to the fracture rock sample. (Author)
Keywords	Columns(Supports) Reinforcement(Structures) Mines(Excavations) Underground supporting Rock mechanics Rock properties Fracturing Reinforcing materials Pressure distribution Supports Strain measurement Radial pressure
Source Agency	Invalid Source Agency Code
NTIS Subject Category	48F - Geology & Geophysics 48A - Mineral Industries 50B - Civil Engineering
Corporate Authors	Bureau of Mines, Washington, D. C.
Supplemental Notes	Prepared in cooperation with Denver Mining Research Center, Colo.
Document Type	Technical Report
Title Note	Report of investigation.
NTIS Issue Number	197319

Strengthening of Fractured Rock Pillars by the Use of Small Radial Reinforcement Pressures.

Strengthening of Fractured Rock Pillars by the Use of Small Radial Reinforcement Pressures.
PB221901

Publication Date	1973
Personal Author	Brady, B. T.; Duvall, W. I.
Page Count	26
Abstract	Results of a study are presented of the effect of low radial reinforcement pressure on the post-failure characteristics of two types of granite, a sandstone and marble. The low radial reinforcement pressure is applied to the rock surface by a gooch rubber sleeve. The gooch rubber sleeve provides a radial pressure of less than one psi pressure to the rock surface. This method of support gives an average strength increase of approximately 8 percent to the fracture rock sample. (Author)
Keywords	Columns(Supports) Reinforcement(Structures) Mines(Excavations) Underground supporting Rock mechanics Rock properties Fracturing Reinforcing materials Pressure distribution Supports Strain measurement Radial pressure
Source Agency	Invalid Source Agency Code
NTIS Subject Category	48F - Geology & Geophysics 48A - Mineral Industries 50B - Civil Engineering
Corporate Authors	Bureau of Mines, Washington, D. C.
Supplemental Notes	Prepared in cooperation with Denver Mining Research Center, Colo.
Document Type	Technical Report
Title Note	Report of investigation.
NTIS Issue Number	197319