Precise detection method for surrounding rock failure range of mining influenced roadway

The invention discloses a precise detection method for a surrounding rock failure range of a mining influenced roadway. The method comprises the steps of: obtaining drilling cores around a surroundingrock of the roadway prior to the mining influence and after the tunnel tunneling influence, and employing a drilling imaging device to primarily observe the depth position of the macroscopic fissureof the surrounding rock of the roadway; taking rock cores at the outer portion of the depth macroscopic fissure, employing the finite element method to divide the rock cores into equal-length rock blocks, and employing a magnetic resonance imaging device to scan all the rock blocks; after the core taking positions are subjected to mining, extracting the rock cores at the same sampling place positions again, and observing the macroscopic fissure position, taking the rock cores at the outer portion of the macroscopic fissure at the depth position, dividing the rock cores into the rock blocks having the same length as the