Rock dynamic tensile strain testing method

The invention relates to the technical field of rock strain testing, in particular to a rock dynamic tensile strain testing method. The method comprises the following steps: symmetrically drilling two blasting holes in the central axis of the surface of a rock test piece; a blast hole guide groove is formed along the central axis of the blasting blast hole; the blasting blast holes are exploded through a blasting and detonating system; and the dynamic strain acquisition system is used for acquiring the limit strain when the rock test piece is damaged. According to the rock dynamic tensile strain test method provided by the invention, the dynamic ultimate tensile strain during rock blasting damage is measured through a series of test designs, the unit consumption of rock blasting explosives is calculated, a method is provided for solving the unit consumption of rock blasting explosives, and the operation is simple and convenient. 本发明涉及岩石应变测试技术领域，尤其涉及一种岩石动态拉应变测试方法。步骤如下：在岩石试件表面中轴线上对称钻两个爆破炮孔；沿着爆破炮孔中心轴线上开设炮孔导向槽；通过