5.Examples
5.1. The new auxiliary shaft at the Taoyuan coal mine
The Taoyuan coal mine is located in the town of North Yangzhai, which is in the southern part of Suzhou City, Anhui Province, China. To extend the depth of development, the new auxiliary shaft was built at the Taoyuan coal mine with a designed depth of 855.55 m. During the construction of the shaft, it would cross 10 coal seams, including the No. 7-2 and No. 8-2 coal seams, which were outburst-prone seams. The No. 8-2 coal seam was uncovered at a depth of 771.3 m; the measured gas pressure was 4.31 MPa, and the gas content was 13.92 m3 t