The invention discloses a lossless detection method for a strata pressure movement law, and relates to the technical field of strata pressure movement law detection. A test section set is arranged at every three columns of anchor rods in a roadway 50 m along ahead the axis of the roadway from the end of a
coal face, and top plates of the test section sets and the anchor rods, needing anchor rod
axial force testing, on the two sides; a mine
intrinsic safety type anchor rod lossless detection
system is adopted to perform anchor rod
axial force testing on the numbered anchor rods; along with the fact that the
coal face is advanced forwards, test sections need to be continuously added on the outer section of the roadway in the advancing direction of the
coal face to enable a test zone to always be kept about 50 m, and the
axial force testing times of each anchor rod is more than six times; the test axial force of each anchor rod serves as a
vertical coordinate, the advancing distance of the coal face serves as a horizontal coordinate, the vertical coordinates and the horizontal coordinates are input into a two-dimensional coordinate
system to draw a graph, an axial force change law of the anchor rods which are away from the coal face at different distances can be obtained, and then the roadway surrounding rock strata pressure movement law of coal face advancing is further obtained.