Idea and implementation of “stress relief-support reinforcement” cooperative control in rockburst roadway

Aiming at the problems of rockburst roadway support failure and large deformation caused by coal seam blasting,field tests and research analysis were used to reveal the damage effect of blasting on roadway support,and the cooperative control principle and implementation of“blasting stress relief-support reinforcement” for rockburst roadway were proposed. The results show that: coal seam blasting stress relief has the effects of“plasticizing,load reduction and energy consumption”,but it also has the adverse effects such as“surrounding rock deterioration,support attenuation,structural instability and roadway deformation”. Adhering to the prevention and control concept of blasting stress relief and minimizing roadway damage,dialectical unify of“relief-support”and synergistic double effects. Once the blasting causes excessive damage to the support,reinforcement support is needed to reshape the stable roadway support structure and bearing capacity. JP3The collaborative control principles of“relief-support” include: the principle of unity,the principle of overall planning,the principle of precision,and the principle of order. The realization path of collaborative prevention and control of“relief-support”is as follows: determining the roadway impact risk area - coal seam blasting stress relief design - blasting stress relief construction and monitoring - blasting stress relief effect and surrounding rock damage effect evaluation - blasting parameter optimization and roadway support structure reconstruction.