松散岩块压实破碎规律的试验研究

通过对松散岩块压实破碎的试验研究,得出松散岩块的压实破碎规律。研究结果表明,岩块的破碎大部分发生在压力水平较低的情况下,一般相对压力小于0.5～0.6,当压力超过这个范围时,岩块的破碎率就很小了,颗粒的级配基本保持不变。岩块压实破碎后,当颗粒级配趋于稳定时,对于强度较低的岩块,所产生的细颗粒的成份较多;而对于强度较高的岩块,所产生的各级颗粒的含量相差并不明显;对于强度不同的岩块,其级配曲线具有很强的相似性和相关性,并可用二次多项式进行描述。

TESTING STUDY ON COMPACTION BREAKAGE OF LOOSE ROCK BLOCKS

Through experimental results on the compaction breakage of loose rock blocks,some breaking laws are obtained. The results show that the majority of blocks are broken before the relative load reaches 0.5 or 0.6 compared to unixial compressive strength. When the stress exceeds such level,the broken rate of blocks is very small. Therefore,the grading of granular tends to keep constant even if the exerted load is increased. For soft rock, e.g.,coal,the ultimate fine particles have a greater percentage. However,for hard rock,e.g.,sand stone,the difference of ingredient of each class of particle is not apparent. For rock blocks with different strengths,the curves of grading of granular have strong similarity and relativity and can be described by polynomial.