Abstract: Tailings heaps are characterized by the platform-steep slope pattern. This artificial landform can provide conducive conditions for the rainfall-induced runoff erosion. This study aims to explore the response erosion of the tailings heaps to covering measures under rainfall-inflow conditions. A systematic investigation was also implemented to evaluate the slope erosion protection of the temporary measures. A series of the experiment were then carried out on two covering measures by the dust-proof net and reinforced mike mat. The bare slope served as the control. The rainfall-inflow was also simulated using indoor soil troughs (2.0 m ×0.5 m × 0.35 m). Two flow discharge rates (7 and 14 L/min) and three rainfall intensities (90, 120, and 150 mm/h were set under the slope gradients of 36. The results showed that the covering measures of the dust-proof net and reinforced mike mat effectively reduced the fluctuation in the runoff yield rate. Compared with the bare slopes, the fluctuation cycles of the runoff yield rates were extended by 2 to 5 min at the inflow rate of 7 L/min. For instance, the fluctuation cycles of the runoff yield rates were extended by 5 min at the inflow rate of 14 L/min. Furthermore, both the dust-proof net and reinforced mike mat significantly reduced the sediment accumulation in the slope of tailings heaps. Compared with the control, the sediment reduction rates of the dust-proof nets and reinforced mike mat were 28.80% and 23.26%, respectively, at the inflow rate of 7 L/min. The protective efficacy of the two covering measures declined at the inflow rate of 14 L/min. The sediment reduction rates dropped to 6.94% and 7.71%, respectively. The flow and controlling sediment were reduced by the dust-proof net and reinforced mike mat. A single-peak curve pattern was observed under the rainfall-inflow erosion conditions. The erosion gullies on the slope surface were suppressed under both covering measures, compared with the control. Moreover, the flow regime was shifted from the subcritical-laminar to the supercritical-laminar at the inflow rate of 7 L/min, as the rainfall intensity increased. Once the inflow rate increased to 14 L/min, the flow regime was shifted from the laminar to the turbulent flow. The flow regime and patterns tended to be consistent as the inflow rate and rainfall intensity increased. When the inflow rate was 7 L/min, the factor P values of the temporary measures were 0.71 and 0.77, respectively, for the dust-proof nets and reinforced mike mat. When the inflow rate increased to 14 L/min, the corresponding P_m values rose to 0.99 and 0.97, respectively. The effective protection against soil erosion was found in the covering measures by the dust-proof net and reinforced mike mat. Their protective effectiveness was also subjected to the combined effects of the rainfall and runoff, as the inflow rate increased. The findings can provide the theoretical guidance to optimize the covering measures on the heap's slope in production and construction. The important parameters can greatly contribute to the disturbed prediction model of soil accumulation erosion.