Study on standing blasting technology applied to handle powered support jammed accident occurred in fully -mechanized coal mining face

In order to solve the calculation and application problems of the blasting parameters applied to the powered support jammed accident, with the certain g eological condition of No.1295 coal mining face in Qianjiaying Mine as the study background, a method combined with the theoretical analysis, numerical simulation an d site effect monitoring and measuring was applied to the study on the actual application effect of standing blasting technology applied to handle the powered support ja mmed accident occurred in the coal mining face. The results showed that the application of the standing blasting technology could obviously reduce the roof pressure af fected to the jammed powered supports in the coal mining face. After the standing blasting conducted, the powered support in the coal mining face could re-support up t he overburden roof with the self support pressure of the powered support. In the study on the detonation role process of the explosives, the performances of the FLAC3 Dnumerical simulation software showed a high application value. With the dynamic loading conducted on the model, an observation was made on the dynamic loading a ffected to the model and a study was conducted on the feasibility and suitability of the standing blasting parameters. The engineering application results showed that aft er the standing blasting technology applied, the roof pressure was obviously reduced. Meanwhile, the work load of the floor excavation and roof ripping was highly redu ced and the labor intensity of the miners was reduced.