Document Type
Conference Paper
Publication Date
2024
Abstract
In order to realize the accurate division of coal and gas outburst risk zones, taking Juji Coal Mine as the case study, the method of coal and gas outburst risk zones division based on quantitative coupling of gas and stress is proposed. The results show that the high gas pressure zones are concentrated in the eastern of No.23 mining area, and most of No.26 and No.27 mining area. The vertical stress in the mine ranges from 6 MPa to 36 MPa. The comprehensive weights of gas pressure and stress are determined by AHP-entropy weight method, and the outburst risk comprehensive index Q is calculated accordingly. According to the range of Q, the mine is divided into low risk zone (Q < 0.5), medium risk zone (0.5 ≤ Q ≤ 0.75) and high risk zone (Q > 0.75). It has been verified that the drilling cuttings S value in No.26 mining area (high risk zone), No.27 mining area (medium risk zone) and No.211 mining area (low risk zone) is 3.6~4.8 kg/m, 3.2~4.6 kg/m and 3.0~4.4 kg/m, and the initial gas emission velocity q value ranged from 0 to 3.7 L/min, 0 to 0.46 L/min and 0 L/min, respectively.
Publication Details
Yujie Peng, Dazhao Song, Xueqiu He, Liming Qiu, Anhu Wang, Gang Yang, Litao Wang and Limin Qie, The method of coal and gas outburst risk zones division based on quantitative coupling of gas and stress, Proceedings of the 2024 Resource Operators Conference, University of Wollongong - Mining Engineering, February 2024, 276-284.