Results 51 to 60 of about 1,131 (181)

Application of RMR89–NATM Rock Mass Classification for Tunnel Design: A Case Study From Bilaspur, Himachal Pradesh, India

Engineering Reports, Volume 8, Issue 3, March 2026.
The Bilaspur region lies in a highly seismic zone, requiring special attention for infrastructure development like tunnel construction. Rock strength in the area is low, posing challenges for stable tunnel design. RMR values range from 21 to 30, categorizing the rock mass as Poor, requiring robust support measures.
Baalamurugan Arumugam, Selvam Sekar, Muthukumar Perumal, Jesuraja Kamaraj, Muralitharan Jothimani   +4 more
wiley   +1 more source

Research on the Evolution Law of the Plastic Zone and Control Technologies for Surrounding Rock in Floor Roadway Influenced by Mining Activities

Energy Science &Engineering, Volume 14, Issue 1, Page 444-459, January 2026.
ABSTRACT This study addresses the challenges of deformation failure and the difficulty in controlling the surrounding rock in the 2453 floor roadway of a coal mine in Hunan Province, influenced by mining activities. Conducting an in‐depth investigation into the evolution law of the principal stress and stability control technologies for the surrounding
Shihai Shu, Weijun Wang, Yujie Ma, Chao Yuan, Xinyu Tian, Rongjie Du, Sha Ge   +6 more
wiley   +1 more source

Shotcreting in Tunnels

International Journal Of Engineering And Computer Science, 2016
Since the development of New Austrian Tunneling Method (NATM), shotcrete in tunnels has been widely applied. It’s most important features are durability, speed of application and cost effectiveness. The New Austrian Tunnelling Method (NATM) is characterized by the continuous adaption of driving parameters, such as unsupported length (i.e., the distance
openaire   +1 more source

Study on Vibration Superposition Induced by Dual‐Line Subway Train Operation in Submerged Tunneling Sections

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
Accurately predicting the vibration response when a new tunnel passes beneath an existing double‐track railway represents a major challenge in assessing the environmental impact of urban underground engineering. Traditional numerical simulations rely heavily on noisy field‐measured signals and simplified single‐source assumptions, leading to ...
Yunsi Liu, Yueyuan Huang, Yuxiao Wu, Shikha Binwal   +3 more
wiley   +1 more source

Pore structure characteristics of admixture shotcrete and its quantitative relationship with mechanical properties in high geothermal environment

Journal of Materials Research and Technology
The high geothermal environment during tunnel construction leads to the abnormal porosity and decreased mechanical properties of shotcrete, but its degradation mechanism is still unclear.
Wei Wang, Shaohui Zhang, Yan Wang, Jian Yuan, Ditao Niu   +4 more
doaj   +1 more source

Investigations on Rockmass Structure Characteristics and Mechanical Mining Efficiency and Economics in the Jinchuan No. 3 Mine With Hard Rock

Advances in Civil Engineering, Volume 2026, Issue 1, 2026.
Geomechanical characterization is crucial for assessing the feasibility of the mechanical construction method in geotechnical engineering, which is a construction method that neither uses explosives nor involves blasting operations. But for hard rock mines, relying solely on rock strength data is insufficient to estimate the applicability of cantilever
Jian Zhao, Dan Huang, Daming Zhu, Mingyue Wang, Xuanke Li, Heng Jia, Manoj Khandelwal   +6 more
wiley   +1 more source

Experimental Study on Basic Mechanical Properties of Steel Fiber-Reinforced Siliceous Wet Shotcrete

Advances in Materials Science and Engineering, 2018
In order to solve the problem of low strength and easy cracking of shotcrete in permanent support of tunnel single shell lining, the effects of steel fiber-reinforced siliceous on mechanical properties of wet shotcrete were investigated by the tests of ...
Xu Yan, Li-min Liu, Jin-peng Zhang, Yan-hui Li, He Wang   +4 more
doaj   +1 more source

Study on creep performance of shotcrete lining for tunnels

Journal of Materials Research and Technology
Creep, as a long-term deformation characteristic of shotcrete, significantly influences the load-bearing performance and durability of tunnel support structures. This study conducted creep tests on shotcrete under varying stress levels.
Yali Jia, Lixi Zhao, Lei Wang, Qingyu Gao, Baice Qiao, Qingxin Zhao   +5 more
doaj   +1 more source

Damage of shotcrete under freeze-thaw loading

Journal of Civil Engineering and Management, 2017
The freeze-thaw durability of shotcrete can be improved by adding an air-entraining agent in cold areas. The main focus of this paper is to investigate the changes in the internal pore structure of C25 ordinary shotcrete and shot­crete mixed with a RM-YQ
Jianxun Chen, Pengyu Zhao, Yanbin Luo, Xianghui Deng, Qin Liu   +4 more
doaj   +1 more source

ERECTION OF SHOTCRETED LINING WITH EXPLOSIVES

Bridges and tunnels: Theory, Research, Practice, 2015
The basic circuit design of erection of shotcrete lining in vertical excavations of round cross-section, and also algorithm of scaling of key parameters of a way is considered. Results of scalings of parameters of a way on the given algorithm for the basic industrial explosives are ...
Khomenchuk, О. V., Borschevsky, S. V., Goncharenko, V. V.   +2 more
openaire   +2 more sources