Datas of pyroclastic deposits crushing microscopic analysis under experimental mechanical compaction studies

Recently, many scholars have conducted experimental mechanical compaction studies on sand-stones, carbonates, and mudstones to visually study the mechanical compaction process and res-ervoir evolution of sedimentary rocks. However, experimental mechanical compaction studies on the evolution of the compaction process of pyroclastic rocks have been ignored. Volcaniclastic rock reservoirs are widely distributed across the world and strongly influenced by the crushing of pyroclastic particles. In this study, we analyzed the characteristics and controlling factors of the crushing of pyroclastic particles during compaction diagenesis from a microscopic perspective through experimental mechanical compaction. These results can provide quantitative compaction background parameters for the quantitative study of pyroclastic rock reservoir evolution. We took pyroclastic samples from the Hongtu Hill in the Changbaishan area as an example, and experi-mental mechanical compaction experiments were conducted. Furthermore, image surface porosity and particle analysis statistical methods were used, and the variations in the effective porosity and image surface porosity under different axial stresses were studied.