In order to study the effect of the increase of effective stress on the anisotropy of permeability and porosity of CBM formation during the development process of CBM reservoir. coal samples from different directions are adopted and the anisotropy of the CBM reservoir in southern Qinshui Basin is evaluated and the influence of the increase of effective stress on the anisotropy of poro... https://jalyttlers.shop/product-category/tv-stand/