In order to promote the controllable safety and efficiency of the hard roof in coal mines. this paper studies the multi-layer directional high pressure fracturing technology. The UDEC numerical simulation was used to study the kinetic and total energy release of the roof before and after directional hydraulic fracturing. The results show that the weighting interval is reduced by 7. https://parisnaturalfoodes.shop/product-category/super-b-complex/