Based on the complexity and incompatibility of factors of pipeline wear risk, the subjective and objective combination weights and variable fuzzy sets were introduced to evaluate the backfill pipeline wear risk. The 12 main factors, i.e., weighted average particle size of backfill aggregation, shape of backfill aggregation, slurry density, slurry corrosivity, pipeline wear resistance, pipeline inner diameter of drill-hole, pipeline thickness, drill-hole inclined rate, multiple ratio pipeline length to column in backfill, installation quality, the ratio of velocity and critical velocity and deg...
