Tensile fracturing was investigated in this study under a static (10⁻⁵) and quasi-static (10⁻³ and 10⁻² S⁻¹) strain rate in three different rock types (marlstone, marble, and hornfels). In addition, the effect of έ on the microscopic properties of the fracture such as the width and tortuosity was investigated by tracing the fracture path under the microscope. The results indicated that by increasing the έ from 10⁻⁵ to 10⁻² S⁻¹, the crack propagation speed in marlstone and marble increased from 4 to 22 m/s and in hornfels from 35 to 100 m/s. The improvement of the parameters associated with hydraulic fracturing is achieved by reducing the έ. By reducing the έ from 10⁻² to 10⁻⁵ S⁻¹, the (fracture toughness, and breakdown pressure) in marlstone, marble, and hornfels decreased by (37%, 22%), (42%, 30%), (46%, 39%), respectively. In addition, the width of the fracture was strongly affected by the έ, this parameter increased by 55%, 36%, and 51% in marlstone, marble, and hornfels, respectively, when the έ decreased from 10⁻² to 10⁻⁵ S⁻¹. In the very fine- and fine-grained rocks such as marlstone and hornfels; by decreasing the έ from 10⁻² to 10⁻⁵ S⁻¹, the tortuosity factor decreased only by about 0.4%, while in the medium-to coarse-grained rocks such as marble decreased by 4.6%.

本研究在静态（10 ^-5）和准静态（10 ^-3和10 ^-2  S ^-1）应变率下研究了三种不同岩石类型（泥灰岩、大理石和角岩）中的拉伸压裂。此外，通过在显微镜下追踪裂缝路径，研究了 έ 对裂缝宽度和曲折度等微观性质的影响。结果表明，通过将 έ 从 10 ^-5增加到 10 ^-2  S ^-1，泥灰岩和大理石中的裂纹扩展速度从 4 增加到 22 m/s，角岩中的裂纹扩展速度从 35 增加到 100 m/s。与水力压裂相关的参数的改进是通过降低 έ来实现的。通过将έ从10 ^-2降低到10 ^-5  S ^-1，泥灰岩、大理石和角岩中的（断裂韧性和击穿压力）降低（37%，22%），（42%，30%）， （46%、39%）。此外，裂缝的宽度受到 έ 的强烈影响，当 έ 从 10 ^-2降低到 10 ^-5时，该参数在泥灰岩、大理石和角岩中分别增加了 55%、36% 和 51%  S ^-1. 在非常细的和细粒的岩石中，例如泥灰岩和角岩；通过将έ从10 ^-2降低到10 ^-5  S ^-1，曲折系数仅降低了约0.4%，而在大理石等中粗粒岩石中降低了4.6%。