The samples were analyzed by gas chromatography for C1 to C5 hydrocarbons and for 4, %, 5, He, and Cq. Find additional information on Mine Gases in underground mines in these Adobe PDF documents. It is also a key component of Black Damp, caused by biological oxidation such as rotting mine timbers. This presentation, from the PA Bureau of Mine Safety is appropriate for all mine training programs.

Properties of Mine Gases 14. Adobe PDF Mine Gas Documents. EXPLOSIONS STUDIED. A: INTRODUCTION Air is the transparent medium surrounding the earth in which plants, animals, and human beings live and breathe. A: CH 4 and H 2 S Q: Name the common gases found in coal mines following a mine fire or explosion? In addition, detonation product gases may be present in the muck pile and may also move into cracks and fissures in the ground. The first of the three mine explosions mentioned occurred in the Naomi mine of the United Coal Company, near Bellevernon, Pa., on Sunday, December 1, at 7.40 p. m. All the men who were within the mine at … A dangerous mine atmosphere is one that is or is likely to become poisonous to breathe, deficient in oxygen, or explosive. – inflow rate of the gas into the mine atmosphere, cfm Q – inflow rate of the incoming air, cfm. A: 1.000: Q: Write down the chemical symbols of Methane and Hydrogen Sulfide. The gases move through the ground and may collect in a nearby confined space such as Carbon Dioxide (CO 2) Carbon Dioxide is a natural component of air at approximately 0.03%. It is lighter than air, having a specific gravity of 0.554 and is often found near the mine roof (ceiling of the mine opening). v Threshold Limit Value (TLV) as re- commended by ACGIH: airborne conc. 2.4 Mb: Diesel Aerosols and Gases in Underground Mines Air is a mixture of several gases which, though ordinarily invisible, can be weighed, compressed to a liquid, or frozen to a solid. Samples of gas were obtained directly from the coalbed during drilling of horizontal and vertical boreholes in six different formations. MINE GASES A. of substance & D EXPLOSIVE MINE GASES AND DUSTS. Mine Gases Mine gases and their detection is discussed.

66 Kb: Hydrogen Sulfide Fact Sheet Important information about this very toxic mine gas, hydrogen sulfide (H 2 S).

Q: What is the specific gravity of normal air? initiated if the wind will carry the cloud in the direction of neighbors off mine property. 6 Methane CH 4 Methane is a colorless, odorless, flammable gas. Gas-1 MINE GASES Contaminants – any undesirable substance not normally present in air or present in an excessive amount; ☞ Most common types underground: gases and dusts . Methane in the gas varied from 63 to 99 percent; carbon dioxide from 0.1 to 15 percent. Code of Federal Regulations Part 75 15. Questions and Review .