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Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Frontiers of Structural and Civil Engineering   Pages 1370-1386 doi: 10.1007/s11709-023-0947-0

Abstract: The tunnel boring machine (TBM) is typically used in hard-rock tunnel excavation.Owing to the unsatisfactory adaptability of TBM to the surrounding rock, when crossing high-strengthTherefore, high-pressure waterjet technology should be applied to assist in rock breaking for efficientnozzle diameter, and nozzle speed on cutting are investigated via laboratory experiments of cutting hardrock using high-pressure waterjets.

Keywords： tunnel boring machine     hard-rock cutting     free face     disc cutter     rock-cutting efficiency    

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Frontiers in Personless Mining and Avenues of Their Advancement in China

Li Zhongxue,Li Cuiping,Liu Shuangyue

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 16-20

Abstract: depth and other adverse conditions confronted by the mining industries,  increase the efficiencyof extracting mineral resources,  and safeguard the safety and health of mining workers.to enhance technology innovations in personless mining and provide the mining industries with a freshperspective to personless mining.,  and proposes some avenues of advancing technology innovations in automated mining in China.

Keywords： hard-rock mining     automated mining     personless mining     personless mine    

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Working Procedure of Developing a New Deep Hard-rock Burst-prone Deposit

Guo Ran,Yu Runcang

Strategic Study of CAE 2002, Volume 4, Issue 7,   Pages 51-55

Abstract: In this paper, the authors create a general working procedure to develop a new hard-rock burst-pronesamples ;in-situ rock stress measurement; possibility of strain burst in the mine; principles in theselection of mining techniques; setting up seismic monitoring system.The above study results lays a theoretical foundation for applied research of deep hard-rock burst-pronemining.

Keywords： rockburst     mining technique     working procedure    

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Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1372-1389 doi: 10.1007/s11709-021-0772-2

Abstract: correlation were used to study the spatiotemporal evolution characteristics of crack extension of soft and hardcomposite laminated rock masses (SHCLRM) containing double fissures under uniaxial compression.The effects of different rock combination methods and prefabricated fissures with different orientationsHard layers predominantly produce tensile cracks; soft layers produce shear cracks.The first crack always sprouts at the tip or middle of prefabricated fractures in hard layers.

Keywords： soft−hard composite layered rock mass     double cracks     crack evolution     acoustic emission     digital image    

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Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Strategic Study of CAE 2011, Volume 13, Issue 11,   Pages 107-112

Abstract:

Top-coal caving difficulty degree and rational mining method were analyzedby theoretical method on the basis of the 4th coal-seam condition of Pingshuo Mining area.For improving top-coal caving degree, the parameters of full-mechanized caving mining face were obtainedPractice showed that safe and high-efficient mining with high recovery ratio would be realized by lengtheningmining face and adding mining height in shallow buried hard coal-seam with hard roof.

Keywords： shallow buried depth     hard coal-seam with hard roof     top-coal caving difficulty degree     full-mechanizedcaving mining with large mining-height    

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Realtime prediction of hard rock TBM advance rate using temporal convolutional network (TCN) with tunnel

Zaobao LIU; Yongchen WANG; Long LI; Xingli FANG; Junze WANG

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 4,   Pages 401-413 doi: 10.1007/s11709-022-0823-3

Abstract: Real-time dynamic adjustment of the tunnel bore machine (TBM) advance rate according to the rock-machine

Keywords： hard rock tunnel     tunnel bore machine advance rate prediction     temporal convolutional networks     soft    

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Some Challenges of Deep Mining Review

Charles Fairhurst

Engineering 2017, Volume 3, Issue 4,   Pages 527-537 doi: 10.1016/J.ENG.2017.04.017

Abstract: Autonomous mining systems, developed through sustained R&D by equipment suppliers, reduce miner exposureMining engineering has relied heavily on empirical procedures in design for thousands of years.Recent developments in the numerical modeling of large-scale mining operations (e.g., caving) using theFor the first time, mining—and rock engineering—will have its own mechanics-based “” This promises to be a major tool in future planning for effective mining at depth.

Keywords： Deep mining     Rock discontinuities     Synthetic rock mass     Mineral resources     Rock mechanics    

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The Practice of Forward Prospecting of Adverse Geology Applied to Hard Rock TBM Tunnel Construction: Article

Shucai Li, Lichao Nie, Bin Liu

Engineering 2018, Volume 4, Issue 1,   Pages 131-137 doi: 10.1016/j.eng.2017.12.010

Abstract:

An increasing number of tunnels are being constructed with tunnel-boring machines (TBMs) due to the increased efficiency and shorter completion time resulting from their use. However, when a TBM encounters adverse geological conditions in the course of tunnel construction (e.g., karst caves, faults, or fractured zones), disasters such as water and mud inrush, collapse, or machine blockage may result, and may severely imperil construction safety. Therefore, the advance detection of adverse geology and water-bearing conditions in front of the tunnel face is of great importance. This paper uses the TBM tunneling of the water conveyance project from Songhua River as a case study in order to propose a comprehensive forward geological prospecting technical system that is suitable for TBM tunnel construction under complicated geological conditions. By combining geological analysis with forward geological prospecting using a three-dimensional (3D) induced polarization method and a 3D seismic method, a comprehensive forward geological prospecting technical system can accurately forecast water inrush geo-hazards or faults in front of the TBM tunnel face. In this way, disasters such as water and mud inrush, collapse, or machine blockage can be avoided. This prospecting technical system also has reference value for carrying out the forward prospecting of adverse geology for potential TBM tunneling and for ensuring that a TBM can work efficiently.

Keywords： Hard rock TBM tunnels     Comprehensive forward prospecting     Geological analysis     3D induced polarization     3D    

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Opportunities and Challenges in Deep Mining: A Brief Review

Pathegama G. Ranjith,Jian Zhao,Minghe Ju,Radhika V. S. De Silva,Tharaka D. Rathnaweera,Adheesha K. M. S. Bandara

Engineering 2017, Volume 3, Issue 4,   Pages 546-551 doi: 10.1016/J.ENG.2017.04.024

Abstract: As a result, underground mining continues to progress to deeper levels in order to tackle the mineralHowever, deep mining occurs in a very technical and challenging environment, in which significant innovativeThis review paper presents the current global status of deep mining and highlights some of the newesttechnological achievements and opportunities associated with rock mechanics and geotechnical engineeringin deep mining.

Keywords： Deep mining     Rock mechanics     Rockburst     In situstresses     Mining automation    

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An Innovative Non-Pillar Coal-Mining Technology with Automatically Formed Entry: A Case Study Article

Xingyu Zhang, Manchao He, Jun Yang, Eryu Wang, Jiabin Zhang, Yue Sun

Engineering 2020, Volume 6, Issue 11,   Pages 1315-1329 doi: 10.1016/j.eng.2020.01.014

Abstract:

A non-pillar coal-mining technology with an automatically formed entry is proposed, which reducescooperate to achieve automatic formation and retaining of the gob-side entry, and to realize non-pillar miningseparates the entry roof and the gob roof; and a blocking-gangue support system (BGSS) integrates the caved rockthe retained entry was under the pressure-relief zone due to the broken-expansion nature of the caved rockthe measures according to different site conditions, it is expected that the proposed non-pillar coal-mining

Keywords： Non-pillar mining     Entry support     Retained entry     Rock engineering     Industrial test    

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Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 533-545 doi: 10.1007/s11709-023-0946-1

Abstract: disc cutters of shield machines exhibit unsatisfactory adaptability and performance during the soft–hardrotation state, cutting performance, and adaptability of disc cutters during shield tunneling in soft–hard

Keywords： shield tunneling     disc cutter load     laboratory excavation test     numerical calculation     soft–hard varied    

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Advances in molecular dynamics simulation of ultra-precision machining of hard and brittle materials

Xiaoguang GUO,Qiang LI,Tao LIU,Renke KANG,Zhuji JIN,Dongming GUO

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 89-98 doi: 10.1007/s11465-017-0412-7

Abstract:

Hard and brittle materials, such as silicon, SiC, and optical glasses, are widely used in aerospaceHowever, these materials display poor machinability because of their hard and brittle properties.Damages such as surface micro-crack and subsurface damage often occur during machining of hard and brittleUltra-precision machining is widely used in processing hard and brittle materials to obtain nanoscaleprovides a review of present research on the molecular dynamics simulation of ultra-precision machining of hard

Keywords： MD simulation     ultra-precision machining     hard and brittle materials     machining mechanism     review    

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Technology of Coal-Rock Mass Hydraulic Fracture Weakeningand Its Development

Huang Bingxiang,Deng Guangzhe,Liu Changyou

Strategic Study of CAE 2007, Volume 9, Issue 4,   Pages 83-88

Abstract:

Technologic problems of top coal recovery ratio, rock burst, coal spontaneouscombustion and gas accumulation induced by hard top-coal or roof's fall in coal mining were introducedCurrent research and development trend of hydraulic fracture weakening for hard top-coal or roof wasanalyzed, including the law of crack expanding induced by hydraulic fracture in rock mass, mescoscopicstructure alteration of cracked rock mass by seepage pressure and its macroscopic mechanics response

Keywords： hard top-coal(roof)     hydraulic fracture     crack expanding     mescoscopic structure    

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Primary cilia in hard tissue development and diseases

Frontiers of Medicine 2021, Volume 15, Issue 5,   Pages 657-678 doi: 10.1007/s11684-021-0829-6

Abstract: Bone and teeth are hard tissues.Hard tissue diseases have a serious effect on human survival and quality of life.mutations present overt changes in the skeletal system, suggesting that primary cilia are involved in hardIn addition, the cilium-related diseases of hard tissue and the manifestations of mutant cilia in theWe believe that all the findings will help with the intervention and treatment of related hard tissue

Keywords： primary cilia     bone     mechanical sensing     hard tissue     cilium-related bone disease     tooth    

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A Closer Look at the Design of Cutterheads for Hard Rock Tunnel-Boring Machines

Jamal Rostami, Soo-Ho Chang

Engineering 2017, Volume 3, Issue 6,   Pages 892-904 doi: 10.1016/j.eng.2017.12.009

Abstract: proprietary algorithms by the manufacturers, and despite recent attention on the subject, the design of rock

Keywords： TBM cutterhead design     Cutterhead layout     Disk cutters     Cutting pattern     TBM efficiency    

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Title Author Date Type Operation

Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Journal Article

Frontiers in Personless Mining and Avenues of Their Advancement in China

Li Zhongxue,Li Cuiping,Liu Shuangyue

Journal Article

Working Procedure of Developing a New Deep Hard-rock Burst-prone Deposit

Guo Ran,Yu Runcang

Journal Article

Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Journal Article

Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Journal Article

Realtime prediction of hard rock TBM advance rate using temporal convolutional network (TCN) with tunnel

Zaobao LIU; Yongchen WANG; Long LI; Xingli FANG; Junze WANG

Journal Article

Some Challenges of Deep Mining

Charles Fairhurst

Journal Article

The Practice of Forward Prospecting of Adverse Geology Applied to Hard Rock TBM Tunnel Construction:

Shucai Li, Lichao Nie, Bin Liu

Journal Article

Opportunities and Challenges in Deep Mining: A Brief Review

Pathegama G. Ranjith,Jian Zhao,Minghe Ju,Radhika V. S. De Silva,Tharaka D. Rathnaweera,Adheesha K. M. S. Bandara

Journal Article

An Innovative Non-Pillar Coal-Mining Technology with Automatically Formed Entry: A Case Study

Xingyu Zhang, Manchao He, Jun Yang, Eryu Wang, Jiabin Zhang, Yue Sun

Journal Article

Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Journal Article

Advances in molecular dynamics simulation of ultra-precision machining of hard and brittle materials

Xiaoguang GUO,Qiang LI,Tao LIU,Renke KANG,Zhuji JIN,Dongming GUO

Journal Article

Technology of Coal-Rock Mass Hydraulic Fracture Weakeningand Its Development

Huang Bingxiang,Deng Guangzhe,Liu Changyou

Journal Article

Primary cilia in hard tissue development and diseases

Journal Article

A Closer Look at the Design of Cutterheads for Hard Rock Tunnel-Boring Machines

Jamal Rostami, Soo-Ho Chang

Journal Article