METHOD FOR MONITORING PRE-BACKFILLING ROOF SUBSIDENCE FOR USE IN FULLY MECHANIZED SOLID-BACKFILLING COAL MINING

摘要

Disclosed is a method for monitoring pre-backfilling roof subsidence for use in solid-backfilling coal mining, suitable for monitoring the amount of pre-backfilling subsidence of a roof on a working surface during a fully mechanized, underground solid-backfilling coal mining process. The method comprises employing Pro/Engineer to create a solid simulation model on the basis of the dimensional parameters of each of the structures of a hydraulic support for backfilling coal mining (7) and the geometrical relationships therebetween, and according to a change in inclination angle of a rear column (3) of the hydraulic support for backfilling coal mining (7) which is obtained by monitoring a backfilling coal mining cycle operation, finally obtaining the amount of pre-backfilling subsidence of the roof on the working surface of fully mechanized solid-backfilling coal mining.