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| 2023, Vol. 60(4): 172-177 DOI: | ||
| Study on Occurrence Characteristics and Risk Prevention Measures of Gas in Non-coal Strata in Zhegushan Tunnel on Wenchuan-Maerkang Expressway | ||
| (1. Sichuan Tibetan Area Expressway Co., Ltd., Chengdu 610041; 2. Sichuan Highway Planning, Survey, Design and Research Institute Ltd., Chengdu 610041) | ||
| Received null Revised null | ||
| Supporting info | ||
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