By Kissell, Fred N.
Compiled by way of the U.S. Dept of overall healthiness and Human prone, CDC/NIOSH place of work of Mine protection and healthiness learn, this 2006 instruction manual describes potent tools 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, akin to the explosibility of fuel combinations. the second one bankruptcy covers methane sampling, that's an important simply because many methane explosions were attributed to sampling deficiencies. next chapters describe methane keep watch over tools for other kinds of mines and mining gear, essentially for U.S. coal mines. those coal mine chapters contain non-stop miners and longwalls, together with bleeders. Coal seam degasification is roofed greatly. different coal mine chapters care for methane emission forecasting and predicting the surplus gasoline from challenging geologic positive aspects like faults.
checklist of Illustrations
record of Tables
Unit of degree Abbreviations utilized in This file
desk of Contents
1. evidence approximately Methane which are vital to Mine security
2. Sampling for Methane in Mines and Tunnels
three. Methane keep an eye on at non-stop Miner Sections
four. combating Methane Ignitions at Longwall Faces
five. Bleeder platforms in Underground Coal Mines
6. Coal Seam Degasification
7. dealing with extra fuel Emissions linked to Coal Mine Geologic gains
eight. Forecasting fuel Emissions for Coal Mine security purposes
nine. keep an eye on of Methane in the course of Coal Mine Shaft Excavation and Filling
10. Methane keep an eye on in Highwall Mining
eleven. keep watch over of Methane in Coal Silos
12. Explosion risks of Coal dirt within the Presence of Methane
thirteen. Methane regulate in Metal/Nonmetal Mines
14. combating Methane gasoline Explosions in the course of Tunnel development
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Additional resources for Handbook for Methane Control in Mining
6 Either electrical or diesel power. 0% and above. See Chapter 14. 3 29 USING PORTABLE METHANE DETECTORS Taking a gas reading with a portable methane detector is a simple matter. Where to measure and how to interpret the reading is not simple. For this reason, the many key points on gas measuring in both “accessible” and “restricted” spaces must be addressed. Methane measurements in accessible spaces. Accessible spaces are those that can be readily entered by a person making a methane measurement with a handheld portable methane detector.
High-volume scrubber. In a full-scale laboratory test facility, Taylor et al.  tested a 14,000-cfm scrubber in conjunction with a 14,000-cfm blowing line curtain. At a 25-ft curtain setback, the methane dilution capacity was 111 cfm (see footnote 12). At a 35-ft setback, the methane dilution capacity decreased to 68 cfm. When the 14,000-cfm scrubber was used in conjunction with a 14,000-cfm exhausting line cur tain, the methane dilution capacity was 58 and 53 cfm at 25- and 35-ft setbacks, respectively.
Portable detectors are designed to be hand-carried, so measurements can be made at any location. They are approved by MSHA under 30 CFR4 22. 25% methane and must have an accuracy of at least 20% over most of the applicable range. Machine-mounted methane monitors are mounted on certain types of mining machinery and operate continuously. 7 MSHA certification requirements for Part 27 monitors are different from the certification requirements of Part 22 detectors. Because of this, Part 27 monitors cannot be used for tasks requiring the use of Part 22 detectors (such as the 20-min gas check task).
Handbook for Methane Control in Mining by Kissell, Fred N.