Abstract
AbstractLithological characteristics, mineral composition, physical properties of water and physical and mechanical properties, weathering zone distribution and other factors of bedrock weathering zone in coal-seam roof determine the strength of its watertight performance, while its performance has a direct impact on impermeable overlying loose surface water aquifers as well as the possible collapse into the roadway. Therefore, we can prove and correctly evaluate the hydro geological conditions of bedrock weathering zone in the working surface, which has an important practical significance on reasonable safe mining coal rock pillar height and upper limit of mining, increasing the recovery rate of coal resources, fully developing and utilizing coal resources. And it provides a reliable basis for mine to achieve a sustained normal safety production.Keywordscoal-seam roofbedrock weathering zonemineral componentlithological characters
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