Effect of weathered on the pore characteristics of different rocks in coal-bearing strata.

ABSTRACT: This study aims to explore how weathered controls the microscopic pore development of rocks. Siltstones to coarse sandstones were selected from the main rocks of the Jurassic strata of the northern Ordos Basin. The pore structure, mineral composition, the pore size distribution (PSD), porosity, permeability and fractal characteristics of unweathered and weathered rocks were analysed using a combination of X-ray diffraction (XRD), scanning electron microscopy (SEM) and low-field nuclear magnetic resonance (LF-NMR). The study showed that the microstructure of different sandstones has obvious differences, the total porosity and permeability of rocks are usually positively correlated with the grain size of the rock, and the microscopic pore structure of rocks of the same lithology changes from

SUBMITTER: Feng D 

PROVIDER: S-EPMC11952217 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature