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| 1 | TBM tunneling in mixed-face ground: Problems and solutions显示文摘Mixed-face ground encountered in Tunnel Boring Machine(TBM) tunneling presents great challenges and may trigger potential hazards without warning. A detailed understanding of such unfavorable conditions is therefore critical to a successful bored tunnel. In this paper, we firstly present a brief review of the definition, classification and the factors related to mixed-face conditions. Secondly, for a better understanding of this topic, we investigate the main difficulties and problems involved in TBM tunnelling under mixed-face ground with detailed cases. Thirdly, from the viewpoint of rock-machine interaction, we give some suggestions on the corresponding mitigation measurements from three categories:(i) selection of TBM type and modification of TBM,(ii) condition of ground and(iii) optimization of TBM operation. | Ma Hongsu Yin Lijun Gong Qiuming Wang Ju | 2015 | International Journal of Mining Science and Technology2015，25，4： | 7 |
| 2 | Excavation of underground research laboratory ramp in granite using tunnel boring machine: Feasibility study显示文摘Underground research laboratory(URL)plays an important role in safe disposal of high-level radioactive waste(HLW).At present,the Xinchang site,located in Gansu Province of China,has been selected as the final site for China’s first URL,named Beishan URL.For this,a preliminary design of the Beishan URL has been proposed,including one spiral ramp,three shafts and two experimental levels.With advantages of fast advancing and limited disturbance to surrounding rock mass,the tunnel boring machine(TBM)method could be one of the excavation methods considered for the URL ramp.This paper introduces the feasibility study on using TBM to excavation of the Beishan URL ramp.The technical challenges for using TBM in Beishan URL are identified on the base of geological condition and specific layout of the spiral ramp.Then,the technical feasibility study on the specific issues,i.e.extremely hard rock mass,high abrasiveness,TBM operation,muck transportation,water drainage and material transportation,is investigated.This study demonstrates that TBM technology is a feasible method for the Beishan URL excavation.The results can also provide a reference for the design and construction of HLW disposal engineering in similar geological conditions.2020 Institute of Rock and Soil Mechanics,Chinese Academy of Sciences.Production and hosting by Elsevier B.V.This is an open access article under the CC BY-NC-ND license(http://creativecommons.org/licenses/by-nc-nd/4.0/). | Hongsu Ma Ju Wang Ke Man Liang Chen Qiuming Gong Xingguang Zhao | 2020 | Journal of Rock Mechanics and Geotechnical Engineering2020，12，6： | 6 |
| 3 | Numerical study of the effect of confining stress on rock fragmentation by TBM cutters显示文摘 | Hongsu Ma Lijun Yin Hongguang Ji | 2011 | International Journal of Rock Mechanics and Mining Sciences2011，，6： | 1 |
| 4 | Progress on rock mechanics research of Beishan granite for geological disposal of high-level radioactive waste in China显示文摘The mechanical behavior of host rock for a deep geological repository of high-level radioactive waste plays a key role in ensuring the isolation function of host rock as a natural barrier under the multi-field coupling environment.For a better understanding of granite in China's Beishan pre-selected area for geological disposal of high-level radioactive waste,a series of investigations were carried out on in-situ stress field of rock mass at depth,strength and deformation characteristics of rocks under different stress and temperature conditions,and rock boreability and adaptability to Tunnel Boring Machine(TBM)technology.The results indicate that Beishan granite shows typical characteristics as a hard and brittle rock with a quite low permeability,and it is favorable to geological disposal.Meanwhile,a new rock mass suitability evaluation system was proposed,and the rock mass mainly composed of Beishan granite was proven to be suitable for geological disposal.Besides,the constructability of Beishan granite at engineering scale was tested and verified through field tests in the Beishan Exploration Tunnel(BET).Here,we summarize the main outcomes of rock mechanics research on Beishan granite in the past years and introduced the current progress of Beishan underground research laboratory(URL)for geological disposal. | Liang Chen Xingguang Zhao Jian Liu Hongsu Ma Chunping Wang Haiyang Zhang Ju Wang | 2023 | Rock Mechanics Bulletin2023，2，3： | 1 |
| 5 | Numerical study of the effect of confining stress on rock fragmentation by TBM cutters显示文摘 | Hongsu Ma Lijun Yin Hongguang Ji | 2011 | International Journal of Rock Mechanics and Mining Sciences2011，，6： | 1 |
| 6 | Technical innovation in the “Beishan No. 1” hard rock tunnel boring machine for high-gradient spiral tunnels显示文摘1 Project overview The“Beishan No.1”,the world’s first-ever hard rock Tunnel Boring Machine(TBM)tailored for high-gradient spiral tunnels,constitutes a pivotal element within the Beishan Underground Research Laboratory(URL)initiative in China.Beishan URL,the first URL for geological disposal of high level radioactive waste(HLW)in China,is a national key construction project listed in the“13th Five-Year Plan”.In 2019,subsequent to receiving approval from the China Atomic Energy Authority,the Beijing Research Institute of Uranium Geology(BRIUG),serving as the project’s owner,initiated its construction.This underground facility,categorized as a“third generation”URL for HLW disposal,i.e.,area-specific URL,was located in Beishan,Jiuquan City,Gansu Province,China,following more than three decades of rigorous research on site selection. | Ju WANG Mengxue QI Bin LONG Hongsu MA | 2024 | Frontiers of Engineering Management2024，11，1： | 0 |
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