One of parameters reflecting coal reservoir permeability——block coal rate

The permeability of reservoir depends on coal body texture to a great extent.Coal body tecture directly relatives to block coal tate got from sieve experiment so block coal rate can feflect coal reservoir's permeability as a whole.In mining areas in the middle part of Liaoning,block coal tate has a direct relationship to permeability.This is a instance that block coal tate regards as one of parameters evaluating coal reservoir.