Research About Roadway’s Smooth Blasting Excavation Based On The Reducing Effects Of Blasting Vibration To The Surrounding Rockloose Circle

Nowadays, the excavation and stability about mining roadway has become the key issues to be solved in mining such as the mining of colliery roadway projection. In our country, smooth blasting is the main method about excavation of roadway. That is because the most of roadway’s area are small in our country and the development of coal mining roadway excavation technology status. And it is likely to use the same method in the future for a long period of time. Therefore, the study of roadway blasting excavation is necessary.Currently, the roadway excavation and efficient in all aspects of smooth blasting technology has done a lot of research has made many meaningful results. But on the frequent blasting vibration of roadway damage and rock loose circle extensions have not yet obtained a clear conclusion. In this article, use "Research about roadway’s smooth blasting excavation based on the reducing effects of blasting vibration to the surrounding rock loose circle" as the title, it considers loose circle roadway expansion is due to a certain degree of rock damage arising. This leads to the study, and then based on rock damage microscopic theory, the study analyzed the damage mechanism of rock blasting vibration, thus revealing the internal relations of rock damage and roadway loose circle extend. And by numerical simulation have been obtained a result that blasting vibration can cause loose circle shaped roadway expansion, and the cumulative effect of vibration on the rocks frequent injury does exist, the roadway loose circle generate further expansion. Since the tunneling project roadway shape, size and other factors are generally not allowed to tamper with the roadway construction process, so the roadway excavation formed after loose circle due to shape and size factors can hardly be avoided. But in the process of blasting excavation blasting parameters by optimizing the blasting vibration is reduced further expand the amount of roadway forming a loose circle or extend its cause is possible to do.Finally, smooth blasting through the tunnel roadway excavation engineering practice through different rock engineering section, to ensure that the effect of both controlled blasting vibration velocity and impact on the roadway adjacent to the roadway have been formed. To tunnel excavation blasting mechanism as the basis, the application out of the blasting parameters optimization method to achieve a good tunnel smooth blasting effects, and reduces the damage and extend shake loose rock to rock circles, and improving the efficiency of excavation and timbering. It is also saving much cost for coal mining company. This article can provide a reference good way for similar projects construction.