Study on large diameter drilling design and dynamic control of extraction in fully-mechanized caving face
In order to solve the problem of difficult gas control in the return air corner during the mining period after the extraction of the fully-mechanized caving face with single"U"ventilation is up to the standard.The law of gas diffusion-migration in goaf was unified with the measures of gas control in goaf,through the gas diffusion-migration model in goaf,the design of large diameter drilling and the dynamic control law of extraction in fully-mechanized caving face were studied by combining numerical solution with field test.The main control factors of large diameter drilling parameter design were analyzed,and the design parameters of large diameter drilling and the dy-namic control parameters of drilling extraction in fully-mechanized caving face were determined,providing a scientific basis for gas con-trol in goaf of fully-mechanized caving face.
large diameter drillingfully-mechanized caving facenumerical simulationdynamic control
万方数据
维普
