Analysis of the minimum safe thickness of water inrush in fault fracture zone based on the silo theory

被引：0

作者：

Meng F. ^{[1
,2
]}

Wang Y. ^{[1
,2
]}

Jiao Q. ^{[2
]}

Wang Y. ^{[1
,2
]}

Li Z. ^{[2
]}

机构：

[1] State Key Laboratory for Geomechanics and Deep Underground Engineering (China University of Mining and Technology), Xuzhou, 221116, Jiangsu

[2] School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, 221116, Jiangsu

来源：

Wang, Yingchao (wych12345678@126.com) | 1600年 / Harbin Institute of Technology卷 / 52期

关键词：

Limit equilibrium method; Minimum safety thickness; Silo theory; Tunnel engineering; Water and mud inrush; Water-rich fault fracture zone;

D O I：

10.11918/201810155

中图分类号：

学科分类号：

摘要：

When a tunnel is near a water-rich fault fracture zone, water and mud inrush disaster easily occurs, where the determination of the minimum safe thickness of water-resistant rock mass is a key issue. Based on the silo theory and the limit equilibrium method, models of water inrush in fault fracture zone were established under the conditions that the tunnel axis is orthogonal and parallel to the tunnel face respectively. The analytic formulas of the water-resistant rock mass influenced by ground stress were obtained. Then, the criterion of water inrush in fault fracture zone was established, and the influence of the width of the fault fracture zone on the minimum safe thickness of the water-resistant rock mass was analyzed. Finally, the research result was applied to the Yonglian tunnel and the Qilianshan tunnel. Results showed that the width of the fault fracture zone had a significant influence on the determination of the minimum safe thickness of the water-resistant rock mass when the width of the fault fracture zone was less than 200 m. The minimum safe thickness of the water-resistant rock mass of Yonglian tunnel was calculated as 7.34 m. Water inrush occurred in Yonglian tunnel due to the insufficient safe thickness. The minimum safe thickness of the water-resistant rock mass value of F6 and F7 faults in Qilianshan tunnel were 10.22 and 11.59 m respectively. In the construction of Qilianshan tunnel, it is safe to pass F6 and F7 faults with 12 m water-resistant rock mass, which indicates that the theoretically calculated value is relatively close to the actual value and has certain reliability. © 2020, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.

引用

页码：89 / 95

页数：6

共 20 条

[1]

Qian Q., Main developments and directions of geological prediction and informatized technology of tunnel construction, Tunnel Construction, 37, 3, (2017)

[2]

Li S., Lin P., Xu Z., Et al., Minimum safety thickness of water and mud inrush induced by filled-type karst water bearing structures based on theory of slice method, Rock and Soil Mechanics, 36, 7, (2015)

[3]

Li T., Lyu L., Duan H., Et al., Water burst mechanism of deep buried tunnel passing through weak water-rich zone, Journal of Central South University (Science and Technology), 47, 10, (2016)

[4]

Li X., Luo G., Chen Z., The mechanism of deformation and water conduction of fault due to excavation in water inrush in underground engineering, Chinese Journal of Geotechnical Engineering, 24, 6, (2002)

[5]

Luo X., He F., A study of geological structures inclined to disaster and models of water burst in deep-buried long tunnels, Modern Tunnelling Technology, 51, 1, (2014)

[6]

Zhang Q., Wang D., Li S., Et al., Development and application of model test system for inrush of water and mud of tunnel in fault rupture zone, Chinese Journal of Geotechnical Engineering, 39, 3, (2017)

[7]

Wang Y.C., Jing H.W., Zhang Q., Et al., Prediction of collapse scope of deep-buried tunnels using pressure arch theory, Mathematical Problems in Engineering, 7, (2016)

[8]

Li S., Li X., Jing H., Et al., Research development of catastrophe mechanism and forecast controlling theory of water inrush and mud gushing in deep long tunnel, China Basic Science, 19, 3, (2017)

[9]

Song R., Zhang D., Wen M., The cusp catastrophe theory analysis for instability of deep-buried tunnels surrounding rock through fault fracture zone, China Civil Engineering Journal, 48, (2015)

[10]

Zhang M., Gao X., Guo Y., Analysis of water inrush in under sea tunnel and its application in Xiang'an tunnel, Journal of Beijing University of Technology, 33, 3, (2007)

← 1 2 →