Download or read book Noise Abatement of Pneumatic Rock Drill written by Charles R. Summers and published by . This book was released on 1974 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Reduction of a Pneumatic Rock Drill written by Aarne Visnapuu and published by . This book was released on 1975 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Abatement of Pneumatic Rock Drill written by Charles R. Summers and published by . This book was released on 1974 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise from Pneumatic Rock Drills written by John William Chester and published by . This book was released on 1964 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were made to determine the effect of the shape of a pneumatic-rock-drill exhaust muffler on its efficiency, and the origin and reduction of exit noise from the mufflers. The report describes the investigation of rock-drill noise abatement.

Download or read book Noise from Pneumatic Rock Drills written by Herbert P. LeVan and published by . This book was released on 1964 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were made to determine the effect of the shape of a pneumatic-rock-drill exhaust muffler on its efficiency, and the origin and reduction of exit noise from the mufflers. The report describes the investigation of rock-drill noise abatement.

Download or read book Noise Reduction of a Pneumatic Rock Drill written by Aarne Visnapuu and published by . This book was released on 1975 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise from Pneumatic Rock Drills written by William C. Miller and published by . This book was released on 1963 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Practical Approach to the Exhaust Silencing of a Pneumatic Rock Drill written by Morton Gary Barth and published by . This book was released on 1972 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: "One-third octave spectrum analyses of the exhaust noise produced by a medium sized pneumatic rock drill were obtained during free recriprocation to determine the most troublesome bands of noise. Noise reduction techniques were then used to design exhaust mufflers which would reduce the level of the exhaust noise to an acceptable level with a minimum increase in back pressure. The prototype mufflers evaluated included an expansion chamber, a resonator, and various modified expansion chambers. One of the modified expansion chambers tested provided very good attenuation reducing the exhaust noise from 113 dBA to 87 dBA at the operator's ear position. It caused only a slight increase in the back pressure and no detrimental effect on drill performance. The resonator muffler did not provide acceptable attenuation of the exhaust noise. Muffler development progressed under the assumption that icing would not be a problem. However, the icing characteristics of the final prototype muffler were studied and a possible method to prevent icing is suggested"--Abstract, leaf ii.

Download or read book Noise Control written by United States. Bureau of Mines and published by . This book was released on 1984 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Control written by and published by . This book was released on 1975 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mining Machinery Noise Control Guidelines 1983 written by R. C. Bartholomae and published by . This book was released on 1983 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Information Circular written by and published by . This book was released on 1975 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Noise Test Report written by Robert R. Stein and published by . This book was released on 1989 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Hydrologic Modifications on Water Quality written by and published by . This book was released on 1975 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List of Bureau of Mines Publications and Articles with Subject and Author Index written by United States. Bureau of Mines and published by . This book was released on 1975 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report of Investigations written by and published by . This book was released on 1989 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rock Engineering Design written by Harsha Vardhan and published by CRC Press. This book was released on 2013-08-28 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physico-mechanical rock properties are significant in all operational mining activities. This book evaluates rock properties by using empirical equations and soft computing techniques. It predicts various physico-mechanical properties such as uniaxial compressive strength (UCS), Schmidt rebound number (SRN), dry density, P-wave velocity (Vp), tensile strength (TS), Young's modulus (E), and percentage porosity (n) using multiple regression and artificial neural network (MLP and RBF) techniques, taking drill bit speed, penetration rate, drill bit diameter, and equivalent sound level produced during drilling as input parameters.