The numerical analysis of borehole blasting and application in coal mine roof-weaken

Systematically analyzed the rock breakage process in borehole blasting, put forward the “dynamic and static press” breakage principle of rock borehole blasting. Use AUTODYN software to make borehole blasting numerical simulation, educed the single and double borehole blasting of rock breakage process and analyzed the borehole non-coupling charge blasting effect. At last, comparing theoretical analysis with numerical simulation methods in roof-weaken of coal mine by blasting, we got that the scene blasting fracture and monitoring coal mine press regulation verified the conclusion of study. The method not only plays a positive role in perfecting borehole blasting theory, but also verifies that the deep hole blasting in coal mine roof-weaken method is effective and feasible.