Abstract
The vast amount of waste rocks excavated during coal mining and stored in dumps presents a significant environmental problem as they readily undergo spontaneous heating. The process produces large amounts of organic compounds, relatively well-soluble in water. The problem is severe because self-heating has been registered in many coal mining regions. The brine application as an anti-pyrogenic agent to prevent self-heating is a method that is still being developed. Its advantages are the ignition temperature increase, rock pores sealing by crystallizing salt, and permeability decrease, preventing contact with oxygen. Since there is no knowledge about the brine potential to leach organic compounds from coal wastes, this project aims to characterize components leached by rainwater and brine applied as an anti-pyrogen.The Starzykowiec dump has stored coal wastes since the beginning of the 20th century. They consist of mudstones, siltstones, claystones, and arcosic sandstones. Most self-heating occurred from the 1940-60s. For the procedure, samples representing six rock types were selected, all thermally affected to different degree. Maceral composition and mineral content were determined at 500 points, and random reflectance was measured on vitrinite particles at 5-100 points. Two rock portions (ca 60g) powdered to
Published Version
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