The invention provides a stope face
impact risk pre-mining pre-evaluation method. Evaluation is conducted by arranging a certain number of focuses and detectors in an open-off
cut or an air return way or a transportation roadway of a stope face which is pre-estimated before mining and utilizing an earthquake CT detection technology. The stope face
impact risk pre-mining pre-evaluation method includes the steps that the
longitudinal wave velocities vz, vl and v0 of earthquake
waves in an immediate roof, an upper roof and a
coal bed of the stope face are determined; the thickness hz of the immediate roof of the stope face and the distance h0 from the focuses to the bottom surface of the immediate roof are determined; the allowed minimum value xzl of the focus inspection distance is calculated; a detection zone rock stratum dynamic failure comprehensive probability index two-dimensional
distribution diagram is obtained, and rock stratum dynamic failure dangerous zones and levels of the dangerous zones in a detection zone are determined; roadway
impact dangerous zones of the stope face and the levels of the roadway impact dangerous zones are determined. According to the stope face impact risk pre-mining pre-evaluation method, the influence of interference
waves can be effectively eliminated, pre-
estimation accuracy is improved, working efficiency is improved, resources are saved, and actual risk relieving work can be more conveniently guided.