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Details

Pneumatic Concrete Placement for Shaft and Adit Closures.

PB93113991

Publication Date	1992
Personal Author	Burnett, M.
Page Count	40
Abstract	A system was developed to pneumatically seal mine entries with a minimum of equipment and expense. This system mechanically feeds and pneumatically transports aggregate mixed with the proper amount of water in a 6-in-diameter pipeline, and pneumatically transports a metered amount of dry cement in a 4-in-diameter pipeline. The two pipes join at the delivery end of the pipeline where mixing occurs as the materials are projected at the desired target such as a mine seal location. A seal can also be made by installing a wire mesh in the entry and then projecting the mix onto it, building an effective seal with a substantially reduced amount of material. A boost system was also developed to allow the system to transport the aggregate, water, and cement around corners or to allow transport of these materials over longer distances without losing transport velocity.
Keywords	Abandoned sites Mine shafts Hydraulic cements Sealing Mines(Excavations) Boreholes Test facilities Test methods Nozzles Mining engineering Cementing
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 50C - Construction Equipment, Materials, & Supplies
Corporate Authors	Burnett Engineering, Sudbury, MA.; Bureau of Mines, Pittsburgh, PA.
Supplemental Notes	Sponsored by Bureau of Mines, Pittsburgh, PA.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	199302
Contract Number	J0319005

Pneumatic Concrete Placement for Shaft and Adit Closures.

Pneumatic Concrete Placement for Shaft and Adit Closures.
PB93113991

Publication Date	1992
Personal Author	Burnett, M.
Page Count	40
Abstract	A system was developed to pneumatically seal mine entries with a minimum of equipment and expense. This system mechanically feeds and pneumatically transports aggregate mixed with the proper amount of water in a 6-in-diameter pipeline, and pneumatically transports a metered amount of dry cement in a 4-in-diameter pipeline. The two pipes join at the delivery end of the pipeline where mixing occurs as the materials are projected at the desired target such as a mine seal location. A seal can also be made by installing a wire mesh in the entry and then projecting the mix onto it, building an effective seal with a substantially reduced amount of material. A boost system was also developed to allow the system to transport the aggregate, water, and cement around corners or to allow transport of these materials over longer distances without losing transport velocity.
Keywords	Abandoned sites Mine shafts Hydraulic cements Sealing Mines(Excavations) Boreholes Test facilities Test methods Nozzles Mining engineering Cementing
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 50C - Construction Equipment, Materials, & Supplies
Corporate Authors	Burnett Engineering, Sudbury, MA.; Bureau of Mines, Pittsburgh, PA.
Supplemental Notes	Sponsored by Bureau of Mines, Pittsburgh, PA.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	199302
Contract Number	J0319005