CHINA MINE ENGINEERING

According to the strength test results, the grey correlation analysis method of grey system theory is used to analyze relationship of various factors affecting the strength of backfill, it provides a simple and effective method for sensitivity analysis of factors affecting the strength of backfill. The results show that the lime-sand ratio is the primary factor affecting the strength of backfill. According to different strength requirements of backfilling, the mine can select the appropriate lime-sand ratio to save the backfilling cost.