System for monitoring overlying roof rock and coal pillar of gob-side entry and method thereof

A system for monitoring overlying roof rock and coal pillar of gob-side entry, comprising top monitoring stations, coal pillar comprehensive monitoring stations, roof stress monitoring stations, and a master computer;

• a first working face is arranged on a lower coal seam, coal pillars are arranged on a first working face upper roadway, and a plurality of the coal pillar comprehensive monitoring stations on the coal pillars;
• a second working face is arranged on one side of the first working face on the lower coal seam, and the coal pillars are located between the first working face upper roadway and a second working face lower roadway;
• an upper coal seam is located above the lower coal seam, a third working face is arranged on the upper coal seam, a plurality of crossheadings are arranged on the third working face, and a plurality of the top monitoring stations are arranged on the crossheadings;
• a plurality of roof stress monitoring stations are arranged at roofs of the coal pillars between the first working face and the second working face on a mining area main roadway;
• the master computer is respectively connected to control terminals of the top monitoring stations, the coal pillar comprehensive monitoring stations, and the roof stress monitoring stations through signal cables, during a mining of the first working face, the top monitoring stations, the coal pillar comprehensive monitoring stations, and the roof stress monitoring stations continuously monitor a overlying roof rock and the coal pillars in a goaf of the first working face;
• after the mining of the first working face is completed, during an excavation or a mining of the second working face, the top monitoring stations, the coal pillar comprehensive monitoring stations, and the roof stress monitoring stations continuously monitor the overlying roof rock and the coal pillars of the goaf of the first working face.