By Kissell, Fred N.

Compiled via the U.S. Dept of healthiness and Human companies, CDC/NIOSH place of work of Mine defense and well-being study, this 2006 guide describes potent equipment for the keep an eye on of methane fuel in mines and tunnels. the 1st bankruptcy covers evidence approximately methane very important to mine safeguard, equivalent to the explosibility of fuel combinations. the second one bankruptcy covers methane sampling, that is an important simply because many methane explosions were attributed to sampling deficiencies. next chapters describe methane keep an eye on tools for other kinds of mines and mining apparatus, basically for U.S. coal mines. those coal mine chapters contain non-stop miners and longwalls, together with bleeders. Coal seam degasification is roofed broadly. different coal mine chapters take care of methane emission forecasting and predicting the surplus gasoline from difficult geologic positive aspects like faults.
entrance topic
• checklist of Illustrations
• record of Tables
• Unit of degree Abbreviations utilized in This document
• desk of Contents
1. proof approximately Methane which are very important to Mine protection
2. Sampling for Methane in Mines and Tunnels
three. Methane keep watch over at non-stop Miner Sections
four. combating Methane Ignitions at Longwall Faces
five. Bleeder structures in Underground Coal Mines
6. Coal Seam Degasification
7. dealing with extra gasoline Emissions linked to Coal Mine Geologic positive factors
eight. Forecasting fuel Emissions for Coal Mine security functions
nine. keep watch over of Methane in the course of Coal Mine Shaft Excavation and Filling
10. Methane regulate in Highwall Mining
eleven. regulate of Methane in Coal Silos
12. Explosion dangers of Coal dirt within the Presence of Methane
thirteen. Methane keep an eye on in Metal/Nonmetal Mines
14. fighting Methane gasoline Explosions in the course of Tunnel development

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177–182. Vinson RP, Thimons ED, Kissell FN [1978]. Methane accumulations in coal mine roof cavities. S. Department of the Interior, Bureau of Mines, RI 8267. NTIS No. PB277919. Wallhagen RE [1977]. Development of optimized diffuser and spray fan systems for coal mine face ventilation. Waltham, MA: Foster-Miller Associates, Inc. S. Bureau of Mines contract No. H0230023. NTIS No. PB277987/AS. –METHANE CONTROL AT CONTINUOUS MINER SECTIONS By Fred N. ,1 Charles D. Taylor,2 and Gerrit V. R. 3 In This Chapter 9 Methane emission peaks 9 Exhaust line curtain or duct 9 The spray fan system 9 Dust scrubbers with blowing ventilation 9 Dust scrubbers with exhaust ventilation 9 The ventilation of abnormally gassy faces 9 Methane detection at continuous miner faces 9 Ventilation and methane detection at bolter faces and 9 Reducing frictional ignitions This chapter gives guidelines for preventing methane gas explosions at continuous miner sec­ tions in coal mines, both at continuous miners and at roof bolters.

PB83216242. Phillips HR [1996]. Identify methods to reduce the risks of frictional ignition hazards. Final project report, project COL 226. za). Phillips HR [1997]. To establish the current status of research, development, and operational experience of wet-head cutting drums for the prevention of frictional ignitions. Final project report, project COL 426. za). Ruggieri SK, Babbitt C, Burnett J [1985a]. Improved spray fan system: installation guide. Waltham, MA: Foster-Miller Associates. S. Bureau of Mines contract No.

At continuous miner faces, there are two approaches to lower the incidence of frictional igni­ tions. The first approach concerns the bit itself—providing a regular change-out schedule to replace worn bits, providing bits with a larger carbide tip to reduce wear, and possibly changing the bit attack angle or the type of bit. The second approach is to mount a water spray behind each bit, aiming the spray toward the location on the rock where the hot metal streak is expected. This anti-ignition back spray quenches the hot streak, reducing its temperature and the chance of a frictional ignition.

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