Research Article
Mechanism of Coal Burst and Prevention Practice in Deep Asymmetric Isolated Coal Pillar: A Case Study from YaoQiao Coal Mine
Figure 21
Seismic CT detection results before and after decompression in the I-I section area of the isolated coal pillar. (a) Characteristics of wave velocity distribution before decompression (2018.09.05–2018.09.24). (b) Characteristics of wave velocity distribution after deconfliction (2018.09.30–2018.10.18). (c) Distribution characteristics of wave speed anomaly index (An) before decompression. (d) Distribution characteristics of wave speed anomaly index (An) after decompression.
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