Research On Deep Roadway Dynamic Yielding Supporting Technology In Da Anshan Coal Mine

Treating Da Anshan mine as engineering background, the mechanism of blasting seismic wave impacting to far field rock mass was researched, blasting dynamic load mathematical model of roadway was established, using yielding support technology to control surrounding rock of roadway of dynamic load, achieved some results:Obtained coal physical and mechanical parameters of axis10of down gateway and the distribution regularities of crustal stress for mine, through testing the coal parameter and crustal stress of Da Anshan mine. Analyzing the regularities of producing and transmission on blasting seismic wave, according to bring to bear viscous boundary and blasting seismic wave to set up numerical calculation model in the condition of blasting for dynamic load. Achieved the stress, displacement, velocity and acceleration value of monitoring point at roadway surface yielding, through researching numerical simulation. This provided a theoretical basis for field test of yielding rock bolting systems in dynamic load deep roadway. The yielding support scheme on roadway of dynamic load for Da Anshan mine is put forward, also support parameter is devised.The monitor result of spot commercial test shows that neither significant separation nor trend of deformation was appeared in roof of return air course in axis10of down gateway. After the whole process of mining pressure, the roadway deformation and fragmentation levels were within the acceptable range. The data of the monitoring point reached the initial design and use requirements, which provided technical support and basic theoretical for coal mine to reduce production costs and maintain splicing and achieve maximum economic benefits.