Prediction of Mining Failure Depth of Coal Floor under Fully Mechanized Top Coal Caving
Taking 12121 face of Gubei coal mine in Huainan as the engineering research background,the geological data of 22 fully mechanized caving faces and the measured value of floor failure depth were collected,and a new prediction model was established through linear regression analysis,the fitting formula of floor mining failure depth was obtained,and the depth of floor mining failure was accurately calculated.Comparing the calculated values and the results of the three traditional statistical formulas with the measured values,it is concluded that the fitting formula of the new prediction model has higher prediction accuracy and smaller error than the traditional statistical formulas,and is closer to the measured values,which can basically meet the needs of the field.The study results have high practical value for water damage control in fully mechanized caving mining of coal seam in Huainan mining area,and provide more scientific basis for water damage control of similar working faces.
fully mechanized top coal cavingfloor water inrushfitting formulafloor mining failure depth
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