Grid based quantitative analysis method for complexity of water damage in coal seam floor limestone
In order to quantitatively analyze the complexity of pressurized water damage in coal seam floor limestone within the working face or mining area range,the No.2901 and No.2903 working faces of Chensilou Coal Mine were taken as the research objects.The de-velopment of karst fractures and containing water conducting structures was explored using multi branch horizontal holes on the ground layer by layer.Three key engineering geological parameters,including fault trace length,drilling leakage rate,and water pressure test permeability rate,were selected.Using planar grid and fuzzy mathematical methods,a scoring calculation method for the complexity of water damage was proposed,which quantitatively revealed the development of karst in the floor limestone and the distribution law of wa-ter conductivity in the study area.The higher the score,the greater the risk of water inrush in the area.The research results can guide the evaluation and verification of the effectiveness of floor water damage control,achieving safe,precise and efficient management.
coal seam floorlimestone aquiferwater hazardcontaining water conductivityquantitative analyze
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