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Blasting for Abandoned Mine Land Reclamation (Closure of Individual Subsidence Features and Erratic, Undocumented Underground Coal Mine Workings).

PB91169847

Publication Date	1991
Personal Author	Workman, J. L.; Thompson, J.
Page Count	420
Abstract	The study has examined the feasibility of blasting for mitigating various abandoned mine land features on AML sites. The investigation included extensive field trial blasts at sites in North Dakota and Montana. A blasting technique was used that was based on spherical cratering concepts. At the Beulah, North Dakota site thirteen individual vertical openings (sinkholes) were blasted with the intent to fill the voids. The blasts were designed to displace material laterally into the void. Good success was had in filling the sinkholes. At the White site in Montana erratic underground rooms with no available documentation were collapsed. An adit leading into the mine was also blasted. Both individual room blasting and area pattern blasting were studied. A total of eight blasts were fired on the one acre area. Exploration requirements and costs were found to be extensive.
Keywords	Cratering Blasting Underground mines Coal mines Land reclamation Field tests Subsidence Vibration Feasibility Voids Design Sites Cost effectiveness Seismographs Montana Abandoned mines Beulah(North Dakota)
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 48E - Soil Sciences 79E - Detonations, Explosion Effects, & Ballistics
Corporate Authors	Calder and Workman, Inc., Washburn, ND.; Bureau of Mines, Washington, DC.
Supplemental Notes	Sponsored by Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	199112
Contract Number	J0289004

Blasting for Abandoned Mine Land Reclamation (Closure of Individual Subsidence Features and Erratic, Undocumented Underground Coal Mine Workings).

Blasting for Abandoned Mine Land Reclamation (Closure of Individual Subsidence Features and Erratic, Undocumented Underground Coal Mine Workings).
PB91169847

Publication Date	1991
Personal Author	Workman, J. L.; Thompson, J.
Page Count	420
Abstract	The study has examined the feasibility of blasting for mitigating various abandoned mine land features on AML sites. The investigation included extensive field trial blasts at sites in North Dakota and Montana. A blasting technique was used that was based on spherical cratering concepts. At the Beulah, North Dakota site thirteen individual vertical openings (sinkholes) were blasted with the intent to fill the voids. The blasts were designed to displace material laterally into the void. Good success was had in filling the sinkholes. At the White site in Montana erratic underground rooms with no available documentation were collapsed. An adit leading into the mine was also blasted. Both individual room blasting and area pattern blasting were studied. A total of eight blasts were fired on the one acre area. Exploration requirements and costs were found to be extensive.
Keywords	Cratering Blasting Underground mines Coal mines Land reclamation Field tests Subsidence Vibration Feasibility Voids Design Sites Cost effectiveness Seismographs Montana Abandoned mines Beulah(North Dakota)
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 48E - Soil Sciences 79E - Detonations, Explosion Effects, & Ballistics
Corporate Authors	Calder and Workman, Inc., Washburn, ND.; Bureau of Mines, Washington, DC.
Supplemental Notes	Sponsored by Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Final rept.
NTIS Issue Number	199112
Contract Number	J0289004