Design of a quiet rock drill. A feasibility study using principles of leavell pavement breaker. Final report

Technical Report · Wed Jun 01 04:00:00 EDT 1977

OSTI ID:6991606

Anderson, F R; Shaikh, N

Noise control of existing pneumatic drills is difficult and runs into cost, performance, and weight penalties. A need exists for a start-from-scratch approach for quiet pneumatic rock drills. The designs based on Leavell principles, that has been successfully used in demonstrating a quiet and vibration-free paving breaker, is the concept chosen here. This report shows the feasibility of a quiet stoper for drilling roof bolt holes in coal mines. The work is directly applicable to pneumatic percussive rock drills. The report shows an oscillator based on patented Leavell concepts which results in a vibration-free tool and noiseless exhaust. Dynamics of the oscillator is analyzed. Independant rotation of drill rod is provided by an air motor (screw expander) and flushing of cuttings is accomplished by an air ejector in a compact lower housing. The feasibility of no exhaust noise, low drill machine noise, and vibration-free casing is discussed.

• Research Organization: Vast Research Co., Bella Vista, Ark. (USA)
• OSTI ID: 6991606
• Report Number(s): PB-274402
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
COAL MINES
DESIGN
DRILLING
DRILLING EQUIPMENT
DRILLS
EQUIPMENT
MINES
MINING EQUIPMENT
NOISE POLLUTION CONTROL
POLLUTION CONTROL
ROCK DRILLING
ROOF BOLTS