Study of underground point hydraulic fracturing increased permeability technology
Abstract：For improving the coal seam permeability and gas drainage effects,researching underground point hydraulic fracturing increase permeability process,increased permeability effect with low-flow water which can reduce the fracturing equipment size,weight,to meet the conditions for space-constrained coal mine.Using RFPA2D-flow software,established on-site environmental conditions the three-hole numerical model,and carried numerical test of point hydraulic fracturing process,suggested the coal damage,crack initiation,development through the whole process.Researched the shear stress,water pressure,water flow and other parameters of the distribution and evolution,which were tested and verified through field experiments.Numerical experiments and field tests show that the underground point hydraulic fracturing can increase the amount of gas drainage,fracturing equipment can achieve miniaturization.
Keywords：point fracturinghydraulic fracturingincreased permeabilitygas drainage
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)