加密预裂爆破技术在巷道贯通中的应用

当水平巷道和垂直井筒掘进贯通时,为防止水平巷道爆破飞石和冲击波对井筒造成破坏,采取控制爆破技术。巷道的掏槽爆破时,为克服掏槽过程中的夹制作用与爆破岩石抛向井筒,结合工艺要求,在合适的时间和位置,利用加密预裂爆破技术,在指定区域进行爆破切割,利用预裂缝在爆破区域形成裂隙,使原岩开裂分离,从而达到预期的掏槽效果。

The application of small distance pre-splitting blasting in roadway transfixion

During driving transfixion of the gallery and vertical well bore,in order to stop blasting flyrock and shock wave from destroying the well bore,the controlled blasting technology is used.In the cut blasting,to overcome the clamping action and blasting rock throwing to the well bore,combined with the comprehensive process requirement,encrypted presplitting blasting technology is applied at suitable time and position.By blasting cutting on appointed region and using crack caused by pre-splitting on blasting region,original rock is cracked and formed,then the cut blasting expected effect is reached.