A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rock Preconditioning to Prevent Rock Bursts--Report on a Field Demonstration
To improve rock-burst control in deep vein mining, a field demonstration has been carried out by the Bureau of Mines to test a new rock-burst control concept--rock preconditioning in advance of mining. The procedure is to fracture the major rock-burst-prone zone during the development of each level before production mining. This allows initial mining to begin in a preconditioned zone and later mining from the level below to end in a prefractured or preconditioned pillar zone that is relatively burst-free. This full-scale field demonstration was carried out on the 7700 level of the Hecla Mining Co.'s Star-Morning mine. Based on observations made during mining and on the data from the Hecla rock-burst monitoring system, there is no doubt that this preconditioning in advance of mining demonstration resulted in much-improved rock-burst control during first-floor mining. It was also concluded that preconditioning the vein was more effective than preconditioning the wall rock.
Rock Preconditioning to Prevent Rock Bursts--Report on a Field Demonstration
To improve rock-burst control in deep vein mining, a field demonstration has been carried out by the Bureau of Mines to test a new rock-burst control concept--rock preconditioning in advance of mining. The procedure is to fracture the major rock-burst-prone zone during the development of each level before production mining. This allows initial mining to begin in a preconditioned zone and later mining from the level below to end in a prefractured or preconditioned pillar zone that is relatively burst-free. This full-scale field demonstration was carried out on the 7700 level of the Hecla Mining Co.'s Star-Morning mine. Based on observations made during mining and on the data from the Hecla rock-burst monitoring system, there is no doubt that this preconditioning in advance of mining demonstration resulted in much-improved rock-burst control during first-floor mining. It was also concluded that preconditioning the vein was more effective than preconditioning the wall rock.
Rock Preconditioning to Prevent Rock Bursts--Report on a Field Demonstration
W. J. Karwoski (author) / W. C. McLaughlin (author) / W. Blake (author)
1979
54 pages
Report
No indication
English
| Engineering Index Backfile | 1928
Unsolved problem of rock bursts
| Engineering Index Backfile | 1947
Rock-bursts -- Their cause and prevention
| Engineering Index Backfile | 1936
Coping with the problem of rock bursts in hard rock tunneling
| Tema Archive | 1984