Author: Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 30
Book Description
Reducing Dust at Longwall Shearers by Confining the Dust Cloud to the Face
Author: Publisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 30
Book Description
Reducing Dust at Longwall Shearers by Confining the Dust Cloud to the Face
Author: Using Barriers to Reduce Dust Exposure of Longwall Face Workers
Author: Robert A. JankowskiPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 20
Book Description
Dust Control on Longwall Shearers Using Water-jet-assisted Cutting
Author: Charles Darrell TaylorPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 20
Book Description
Improved Shearer-clearer System for Double-drum Shearers on Longwall Faces
Author: Natesa I. JayaramanPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 20
Book Description
Dust Control on a Longwall Face with a Shearer-mounted Dust Collector
Author: Natesa I. JayaramanPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 18
Book Description
How to Evaluate Longwall Dust Sources with Gravimetric Personal Samplers
Author: Steven J. PagePublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 24
Book Description
Longwall double-drum shearers frequently have difficulty complying with the 2.0 mg/ m3 dust standard and, therefore, require the use of effective dust controls. However, before dust controls can be implemented effectively, the major individual dust sources must be determined and their relative severity evaluated. The Bureau of Mines has recently developed a sampling strategy, based upon short term gravimetric samplings that can identify the major dust sources contributing to the shearer operator's exposure. This technique utilizes approved gravimetric sampling equipment already available to all mine operators and can be performed by two people in 2 days. Five examples, including data analysis, are discussed with respect to various cutting sequences. In addition, typical dust source contributions obtained from studies of double-drum shearer operations regularly in compliance are included. Mine operators can thereby compare their dust source evaluation results with those from these longwalls.
Dust Sources and Controls on the Six U.S. Longwall Faces Having the Most Difficulty Complying with Dust Standards
Author: Robert A. JankowskiPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 28
Book Description
The Bureau of Mines has recently identified five major factors that contribute to high respirable dust levels on the six U.S. longwall faces having the most difficulty complying with Federal dust standards: (1) a poorly structured cutting sequence, (2) a poorly designed external water spray system, (3) marginal waterflow to the cutting drums; (4) minimal controls at the stage loader and crusher, and (5) the lack of effective controls for dust generated during support advance. The results of this survey illustrate the need to address all the major sources of longwall dust generation and the need for mine operators to implement a variety of control procedures to assure compliance. The Bureau of Mines will continue to assist mine operators in implementing improved dust controls and will work to identify and evaluate controls for dust generated during support advance.
List of Bureau of Mines Publications and Articles ... with Subject and Author Index
Author: United States. Bureau of MinesPublisher:
ISBN:
Category : Mineral industries
Languages : en
Pages : 226
Book Description
Information Circular
Author: United States. Bureau of MinesPublisher:
ISBN:
Category : Mines and mineral resources
Languages : en
Pages : 24
Book Description