Optimal enrichment rate design method based on minimum critical overlying strata protective layer thickness

• Main Authors: ZHANG YUN, LAI XINGPING, LIU YONGZI, WU LONGQUAN, SHAN PENGFEI, TU YUHANG, ZHANG LEIMING, ZHANG NAN, WAN PEIFENG
• Format: Patent
• Language: Chinese; English
• Published: 27.05.2022
• Subjects: CALCULATING; COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS; COMPUTING; COUNTING; EARTH DRILLING; ELECTRIC DIGITAL DATA PROCESSING; FIXED CONSTRUCTIONS; MINING; PHYSICS; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS

The invention provides an optimal fullness rate design method based on minimum critical overlying strata protective layer thickness, which mainly comprises the following steps: acquiring the mining height of a mining area filling mining working face, the thickness of a barrier layer, and physical and mechanical parameters of test coal and rock mass and water vapor, and collecting a plurality of mining area filling mining working face parameters; establishing a gangue heavy metal ion roof migration model, and performing multiple regression analysis by means of MATLAB software to determine the minimum critical overlying strata protective layer thickness h ''; based on a BP neural network model, obtaining a relationship between the mining height M of the working face, the filling rate and the proportion of the thickness h ''of the overlying strata protective layer and the thickness H of the barrier layer; and calculating the optimal filling rate of the working face by combining the actual parameters of the worki