Data Analysis and Key Parameters of Typical Water Hazard Control Engineering in Coal Mines of China

Large-scale efforts to control water hazards require knowledge of relevant grouting theories and recognition of their shortcomings. Relationships between key engineering technical specifications and conventional hydrogeological parameters were defined to guide engineering designs. For regional control of working face projects, the main influential parameters and relationships were obtained by gray correlation and regression analysis. The results showed that fluid loss and water absorption of boreholes are the main determinants of grout volume. When the grouting pressure reaches 2–4 times the hydrostatic pressure, the grout volume can be effectively increased by up to 40%. For water pathway cut-off projects, the general relationship between water inrush and grout quantity was obtained by the theoretical derivation and regression analysis. It was shown that there is a quadratic polynomial relationship between the quantity of grout and the volume of water inrush. These results can be used to plan and optimize large-scale water disaster prevention and control projects and estimate the required investments.