Analysis on Roadway Roof Separation Early Warning Threshold Value for Large Section and Thick Top Coal

The concept of roof separation and main factors of affecting roof separation were introduced. With the engineering geological conditions of 29211 auxiliary transportation roadway, the method of field measurements and numerical simulation were used, and than the article discussed roadway roof separation early warning threshold value with large section and thick top coal. At last, this article provided the technical advantage and theoretical support for roof management in No.2 Mine.