Case Study - Methane Recovery at Surface Mines in the US - EPA

Methane released from coal and surrounding rock strata due to mining activities is coal mine methane (CMM). Methane emitted from surface mines is surface mine methane (SMM). There are three potential sources of fugitive methane emissions associated with surface coal mining. These are: • Methane emitted by the coal...

Underworld: Our Underground Coal Economy | GQ

May 1, 2007 ... He was proud of a lot of what he'd done with his life—his three kids, his stint as a county commissioner, his coal-mining expertise—but his heart, .... You pretty much know instantly if you can take the confinement, the lack of light, the very real worry about the roof caving in or the air supply shutting off or...

This Mind-Blowing Experiment Makes Sand Behave Just Like A Liquid

Liquid Sand: This Mind-Blowing Experiment Makes Sand Behave Just Like A Liquid. Watch a box of ... It's actually physically possible if someone managed to insert a giant air compressor underneath the shoreline. ... Fluidization had its heyday in the 40's and 70's when it was used extensively in the coal mining industry.

Application Research on Testing Efficiency of Main Drainage Pump ...

Nov 29, 2016 ... This paper first introduces the principle of testing the main drainage pump efficiency in coal mine using thermodynamic theories, then analyzes the energy ... Also there will be measuring errors using the ultrasonic flowmeter due to the entrained air and bubble in pipes and the influence to the ultrasonic...

Acid mine drainage - Wikipedia

In many localities, the liquid that drains from coal stocks, coal handling facilities, coal washeries, and coal waste tips can be highly acidic, and in such cases it is treated as acid rock drainage. This liquid often contains toxic metals, such as copper or iron. These, combined with reduced pH, have a detrimental impact on the...

Flygt Slurry Pump Handbook - Xylem

mainly intended for clear liquids. Applications. Slurry pumps are used to move mixtures of liquid and solids in many industries with a broad spectrum of applications, for example mine drainage, dredging of settling lagoons and pumping of drilling mud. The purpose can be: • To pump a medium where abrasive particles are.

Alaska Coal Gasification Feasibility Studies– Healy Coal-to-Liquids ...

Jul 1, 2007 ... The Healy Coal-to-Liquids Plant would use indigenous coal to produce the 14,600 bbl/day of F-. T liquids for offsite shipment by rail. ... Coal Handling. 180 kWe. Coal Milling. 4,550 kWe. Coal Slurry Pumps. 1,090 kWe. Slag Handling and Dewatering. 2,330 kWe. Air Separation Unit Main Air Compressor.

Mine Ventilation - HDPE Pipe & Pump Sales | Lee Supply Co Inc

FRP – Vent Tubing. Fiberglass Reinforced Plastic duct products, used for exhaust and process-related ductwork systems, for use in mining. ... Block Mortar. Mine block mortar provides an air-sealing adhesive bond between concrete blocks in underground coal mine ventilation stoppings.

Conditions in the Mines - History Home

Conditions for those who worked in the coal mines of Britain was probably as bad as, although different from, the conditions of those who worked in the cotton mills. Miners had to ... This could exploded the methane; John Buddle invented an air pump, but it was expensive and pit owners were reluctant to pay for a pump.