METHOD FOR MONITORING DESTROYING DEPTH OF COAL SEAM FLOOR DURING MINING

A method for monitoring a destroying depth of a coal seam floor during mining. The method comprises: determining a water conducting destroying zone according to fracture development situations and water conductivities before and after stoping of a coal seam floor, determining a stress-strain zone according to strain change situations before and after stoping of the coal seam floor, and determining a physical property difference zone according to physical property change situations before and after stoping of the coal seam floor; and monitoring a destroying depth of the coal seam floor during mining according to the water conducting destroying zone, the stress-strain zone and the physical property difference zone. By means of a full-space and multi-parameter coordinated monitoring mode of "point-line-surface", a coal seam floor can be divided into a water conducting destroying zone, a stress-strain zone and a physical property difference zone, thereby facilitating the analysis of the degree to which the coal s