Deformation control of soft rock in deep roadways has always been a challenge in coal mining. The strain softening and rheological properties of high-stress soft rock not only cause large deformation of the surrounding rocks, but also lead to a long duration of deformation. Based on previous research results obtained here in China as well as abroad, this study focused on the S2S2 mining roadway in the Xiaokang Coal Mine of Liaoning Province in China for research and studied the characteristics and damage of its surrounding rock deformation. Furthermore, the sectional form that should be used in roadway construction, as well as the support structure types and parameters were proposed to control the excessive deformation of the surrounding rock. It is suggested that a circular section should be adopted as the mining roadway section, and the high-strength rock should be bolted together, employing the combination of the anchor cable support method. Industrial tests have verified that the circular roadway under the new support mode can enable relative distance changes between the roadway walls, make the roof and floor relatively flat, and reduce the convergence speed to a value lesser than that of the original support mode. The most important advantage is that under this joint support mode, the deformation and damage of the circular roadway would be less affected by mining activity, so the deformation and damage of the mining roadway can be controlled effectively. Therefore, the research results of this study can provide a reference value for similar engineering projects.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
Cai M (2019) Rock support in strainburst-prone ground. Int J Min Sci Technol 29:529–534
Chun-ming A, Chao L, Yi-ming W (2019) Design and mechanical analysis of subarea support for broken rock roadway. Nonferr Metal Eng 9(04):86–92 + 109 (in Chinese)
Guang-ming Z, Rui P, Xiang-rui M (2017) Stability of bearing structure during soft roadway excavation-support. J China Univ Min Technol 46(4):792–803 (in Chinese)
Høien AH, Nilsen B, Olsson R (2019) Main aspects of deformation and rock support in Norwegian road tunnels. Tunn Undergr Space Technol 86:262–278
Hong-jun Z, Shu-cai L, Hai-yan L (2016) Secondary coupling support parameter optimization and research on the large deformation of soft rock roadways. J Cent South Univ (Sci Technol) 47(4):1262–1272 (in Chinese)
Hong-pu K (1997) The key circle theory of roadway surrounding rock. Mech Pract 1:34–36 (in Chinese)
Hu-fang W (2019) Deformation and failure characteristics of high stress soft rock roadway and analysis of support control countermeasures. Energy Technol Manag 44(02):112–113 (in Chinese)
Jian L, Wan-dong H (2019) Study on the floor heave failure characteristics and control technology of large section soft rock roadway in deep mine. Coal Eng 51(4):30–33 (in Chinese)
Kaiser PK, Cai M (2012) Design of rock support system under rock burst condition. J Rock Mech Geotech Eng 4(3):215–227
Man-chao H, Yue Y, Xiao-lei W et al (2013) Control technology for large deformation of Mesozoic compound soft rock in Xinjiang and its application. Chin J Rock Mech Eng 32(3):433–441 (in Chinese)
Pan-pan C, Qian-wei X, He-hua Z (2016) Model experiment study on the failure characteristics of weak surrounding rock mass above tunnel arch and the anchoring effect of bolts. Chin J Rock Mech Eng 35(S2):3561–3570 (in Chinese)
Qing-bin M, Li-jun H, Fan-ge Z et al (2017) Coupling support effect on high-stress deep soft rock roadway and its application. Rock Soil Mech 38(5):1413–1427 (in Chinese)
Thenevin I, Blanco-Martín L, Hadj-Hassen F et al (2017) Laboratory pull-out tests on fully grouted rock bolts and cable bolts: results and lessons learned. J Rock Mech Geotech Eng 9:843–855
Xiang-dong Z, Jun L, Jia-shun L (2017) Research on deformation characteristics of strong expansive soft roadway and its control strategy. J China Univ Min Technol 46(3):493–501 (in Chinese)
Yong-hao D, Wei-Zhong C, Hong-ming T et al (2015) Study of large deformation and support measures of daliang tunnel with soft surrounding rock mass. Chin J Rock Mech Eng 34(S2):4149–4157 (in Chinese)
Yu-ming G (2012) Using dilatancy and stability theory to design bolt support of coal tunnel. China Mine Eng 41(3):43–46 (in Chinese)
Zhi-kuan J (2019) Research on support technology of soft rock roadway in a coal mine. Energy Technol Manag 44(02):114–115 (in Chinese)
This work was supported by State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology/China University of Mining and Technology, Beijing (SKLGDUEK1926) and Liaoning Provincial Natural Fund Guidance Plan (2019-ZD-0571)and The Project of National Natural Science Foundation of China (51374045) and Science and Technology Project of Jingpo New Area (JinPu-0103009) and Liaoning Key Research and Development Plan Guidance Project (LiaoNing-2017229007) and Liao Ning Revitalization Talents Program (XLYC 1807219).
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
About this article
Cite this article
Zhu, X., Yang, S., Xia, H. et al. Joint Support Technology and Its Engineering Application to Deep Soft Rock Tunnel with Strong Creep. Geotech Geol Eng (2020). https://doi.org/10.1007/s10706-020-01222-8
- Deep roadway
- Soft rock with strong creep
- Joint support
- Support mechanism