Author: S. D. Maksimovic
Publisher:
ISBN:
Category : Boring
Languages : en
Pages : 16
Book Description
The Bureau of Mines identified and evaluated major sources of quartz dust during overburden drilling at a surface coal mine, The relative contribution of each source to the total dust hazard was estimated, using personal gravimetric and instantaneous dust-sampling devices. No attempt was made to determine actual dust generation rates. The major sources of dust at the drill rig during dry drilling opera-tions were the collector dump, drill shroud leakage, and drill stem seal leakage, These sources contributed 90 pct of the respirable dust and 89 pet of the respirable quartz dust generated during drilling, The collector dump cycle (21.6 pct of total drilling time) accounted for 38 pct of the respirable dust and 41 pct of the respirable quartz dust, with peak dust concentrations reaching 68 mg/m3. Shroud and drill stem leakage contributed 28 and 24 pct of the respirable dust and 32 and 16 pct of the respirable quartz dust, respectively. A dragline and second drill rig contributed the remaining 10 pct of dust and 11 pct of quartz dust. Gravimetric dust samples collected inside the drill cab and outside, near the cab door, averaged 1.65 and 1.43 mg/m3, respectively, with 6 pct respirable quartz.
Quartz Dust Sources During Overburden Drilling at Surface Coal Mines
Author: S. D. Maksimovic
Publisher:
ISBN:
Category : Boring
Languages : en
Pages : 16
Book Description
The Bureau of Mines identified and evaluated major sources of quartz dust during overburden drilling at a surface coal mine, The relative contribution of each source to the total dust hazard was estimated, using personal gravimetric and instantaneous dust-sampling devices. No attempt was made to determine actual dust generation rates. The major sources of dust at the drill rig during dry drilling opera-tions were the collector dump, drill shroud leakage, and drill stem seal leakage, These sources contributed 90 pct of the respirable dust and 89 pet of the respirable quartz dust generated during drilling, The collector dump cycle (21.6 pct of total drilling time) accounted for 38 pct of the respirable dust and 41 pct of the respirable quartz dust, with peak dust concentrations reaching 68 mg/m3. Shroud and drill stem leakage contributed 28 and 24 pct of the respirable dust and 32 and 16 pct of the respirable quartz dust, respectively. A dragline and second drill rig contributed the remaining 10 pct of dust and 11 pct of quartz dust. Gravimetric dust samples collected inside the drill cab and outside, near the cab door, averaged 1.65 and 1.43 mg/m3, respectively, with 6 pct respirable quartz.
Publisher:
ISBN:
Category : Boring
Languages : en
Pages : 16
Book Description
The Bureau of Mines identified and evaluated major sources of quartz dust during overburden drilling at a surface coal mine, The relative contribution of each source to the total dust hazard was estimated, using personal gravimetric and instantaneous dust-sampling devices. No attempt was made to determine actual dust generation rates. The major sources of dust at the drill rig during dry drilling opera-tions were the collector dump, drill shroud leakage, and drill stem seal leakage, These sources contributed 90 pct of the respirable dust and 89 pet of the respirable quartz dust generated during drilling, The collector dump cycle (21.6 pct of total drilling time) accounted for 38 pct of the respirable dust and 41 pct of the respirable quartz dust, with peak dust concentrations reaching 68 mg/m3. Shroud and drill stem leakage contributed 28 and 24 pct of the respirable dust and 32 and 16 pct of the respirable quartz dust, respectively. A dragline and second drill rig contributed the remaining 10 pct of dust and 11 pct of quartz dust. Gravimetric dust samples collected inside the drill cab and outside, near the cab door, averaged 1.65 and 1.43 mg/m3, respectively, with 6 pct respirable quartz.
QUARTZ DUST SOURCES DURING OVERBURDEN DRILLING AT SURFACE COAL MINES.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
Sources and Characteristics of Quartz Dust in Coal Mines
Author: John A. Organiscak
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 32
Book Description
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 32
Book Description
Investigation of Quartz Dust Sources and Control Mechanisms on Surface Coal Mine Operations
Author: Robert A. Zimmer
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages :
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Energy Research Abstracts
Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 552
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Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 552
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Earth Grounding Beds--design and Evaluation
Author:
Publisher:
ISBN:
Category : Electric currents
Languages : en
Pages : 538
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ISBN:
Category : Electric currents
Languages : en
Pages : 538
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Author:
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ISBN:
Category : Mines and mineral resources
Languages : en
Pages : 504
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Publisher:
ISBN:
Category : Mines and mineral resources
Languages : en
Pages : 504
Book Description
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Author: United States. Bureau of Mines
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 648
Book Description
Publisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 648
Book Description
Monthly Catalogue, United States Public Documents
Author:
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ISBN:
Category : Government publications
Languages : en
Pages : 980
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Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 980
Book Description
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Author: R. A. Wachter
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
Book Description