# A modified rock mass classification system for TBM tunnels and tunneling based on the HC method of China

> Research article (International Journal of Rock Mechanics and Mining Sciences, 2020) · cited 45× · AI/ML

**Wikidata**: [openalex:W3106894715](https://www.wikidata.org/wiki/openalex:W3106894715)  
**Source**: https://4ort.xyz/entity/a-modified-rock-mass-classification-system-for-tbm-tunnels-and-tunneling-based-on-the-hc-method-of-china