Method for acquiring subsidence value of point on main section at any moment

The invention discloses a method for acquiring a subsidence value of a point on a main section at any moment, and the method comprises the following steps: processing irregular rock movement observation line data, establishing mapping between a monitoring point on an irregular rock movement observation line and a corresponding point on the main section, and solving the problem that the subsidence value of the point on the main section cannot be directly solved; establishing a plurality of subsidence value function equations through enough monitoring point data on an irregular rock movement observation line, so the precision of the subsidence value function equations in the aspect of unknown parameter solving can be improved, and then high-precision subsidence values of points on a main section are obtained; by constructing the subsidence value function of the points on the main section based on the time influence function, the subsidence value of the points on the main section at any moment can be solved, and