Abstract: In order to solve the problem of large deformation and failure in the sidewall of a deep gangue-containing coal roadway,the mechanism of failure and strengthening support technology of roadway sidewall are studied by using field measurement,numerical simulation and theoretical analysis based on the maingate of the 10304 working face at Xinglongzhuang Coal Mine.The results show that the failure of the sidewall is characterized by the coal bulging out into the roadway along with the coal-gangue interface,which leads to the failure and breakage of the bolts in this part of the coal,weakening the structural integrity and strength of the coal body,thus leading to the reduction of the overall stability of the roadway.The key to maintaining the stability of the roadway is to control the interlayer shear slip at the coal-gangue interface.Strengthening support techniques such as inclined bolt/rope,high-strength bolt/rope,slurry bolt/rope,increase surface support and increased pretension can achieve effective control of the sidewall of the gangue-containing coal roadway.By using the strengthening support technique,the coal-gangue interface shear slip has been effectively controlled.