National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Noise Study of Longwall Mining Systems.

PB87102257

Publication Date	1986
Personal Author	Pettitt, M. R.; Slone, R. M.
Page Count	173
Abstract	The report covers an investigation to identify and promote the application of noise control technology to future longwall mining machinery. Intensive noise and vibration data were acquired on a typical longwall shearing machine, and the highest noise levels were shown to radiate from the cutter drums. Shearing machine cutter drum noise control techniques that take advantage of the nature of the dynamic forces generated during coal cutting were developed. These include both structural redesign and force isolation techniques. A reduced noise cutter drum was developed that achieved a 5- to 6-dBA system noise reduction at the operator's position.
Keywords	Mining research Caving mining Mining equipment Noise reduction
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 46B - Fluid Mechanics
Corporate Authors	Wyle Labs., Huntsville, AL.; Bureau of Mines, Washington, DC.
Supplemental Notes	Sponsored by Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Open file rept.
NTIS Issue Number	198702
Contract Number	JO188072

Noise Study of Longwall Mining Systems.

Noise Study of Longwall Mining Systems.
PB87102257

Publication Date	1986
Personal Author	Pettitt, M. R.; Slone, R. M.
Page Count	173
Abstract	The report covers an investigation to identify and promote the application of noise control technology to future longwall mining machinery. Intensive noise and vibration data were acquired on a typical longwall shearing machine, and the highest noise levels were shown to radiate from the cutter drums. Shearing machine cutter drum noise control techniques that take advantage of the nature of the dynamic forces generated during coal cutting were developed. These include both structural redesign and force isolation techniques. A reduced noise cutter drum was developed that achieved a 5- to 6-dBA system noise reduction at the operator's position.
Keywords	Mining research Caving mining Mining equipment Noise reduction
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries 46B - Fluid Mechanics
Corporate Authors	Wyle Labs., Huntsville, AL.; Bureau of Mines, Washington, DC.
Supplemental Notes	Sponsored by Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Open file rept.
NTIS Issue Number	198702
Contract Number	JO188072