Mine water inrushes result in serious casualties and property losses, and mining-induced water-flowing fractures are important channels for mine water inrushes. The prediction of the height of the water-flowing fractured zone (HWFFZ) is conducive to avoiding such disasters to a certain extent. In this study, the HWFFZ in layered overburden strata was systematically investigated by means of similar simulations, theoretical analyses and engineering verification. The following results were obtained. Fractures occur in overburden strata because the tensile stress exceeds the tensile strength, while fractures penetrate the overburden strata because the compressive stress exceeds the compressive strength. Whether a fracture penetrates the overburden strata can be expressed by the fracture penetration criterion (FPC) value and the compressive-tensile ratio (i.e., the ratio of the compressive stress to the tensile stress). If the FPC value is greater than the compressive-tensile ratio, the fracture penetrates the overburden strata. For both the 31401 mining face of the Bulianta Coal Mine and the 7130 coal mining panel of the Qidong Coal Mine, the FPC values of the water inrush regions are larger than those of the normal regions, and the compressive-tensile ratios of the water inrush regions are smaller than those of the normal regions.

矿井突水会造成严重的人员伤亡和财产损失，而矿山诱发的流水裂缝是矿井突水的重要渠道。对流水裂隙带高度的预测有助于在一定程度上避免此类灾害的发生。在这项研究中，通过类似的模拟，理论分析和工程验证，系统地研究了分层覆盖层中的HWFFZ。获得了以下结果。由于拉伸应力超过抗拉强度，在覆盖层中产生裂缝，而由于压缩应力超过应力，裂缝穿透覆盖层。抗压强度。裂缝是否穿透上覆地层可以通过裂缝穿透标准（FPC）值和压缩-拉伸比（即，压缩应力与拉伸应力之比）来表示。如果FPC值大于压缩拉伸比，则裂缝会穿透覆盖层。对于布连塔煤矿的31401采煤面和启东煤矿的7130采煤板，突水区域的FPC值均大于正常区域的FPC值，且突水的压缩拉伸比区域小于正常区域。