Study on Simulation of Top Cutting and Pressure Relief Parameters in Directional Fracking
In order to solve the problem that hard roof is difficult to collapse and fall,this paper uses numerical simulation software to study fracking.When the fracturing fluid is injected along the prefabricated fracture,the fracturing fluid in the fracture gathers.When the accumulated energy of the fracturing fluid in the prefabricated fracture exceeds the shear strength of rock,the fracture starts and expands.The cracking effects under different injection displacement,horizontal stress difference,and elastic modulus are analyzed,providing a certain application plan for the subsequent top cutting and pressure relief of hard roof.
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