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seismic reliability analysis of shield tunnel faces under multiple failure modes by pseudo-dynamic method and response surface method

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Journal of Central South University 2022年第5期29卷 1553-1564页

作者： ZHANG Jia-hua XU Peng SUN Wang-cheng LI Bo Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal MinesHunan University of Science and TechnologyXiangtan 411201China School of Resource Environment and Safety Engineering Hunan University of Science and TechnologyXiangtan 411201China

In order to investigate the stability problem of shield tunnel faces subjected to seismic loading,the pseudodynamic method(P-DM)was employed to analyze the seismic effect on the *** kinds of failure mechanisms of active collapse and passive extrusion were considered,and a seismic reliability model of shield tunnel faces under multifailure mode was *** limit analysis method and the response surface method(RSM)were used together to solve the reliability of shield tunnel faces subjected to seismic *** with existing results,the results of this work are *** effects of seismic load and rock mass strength on the collapse pressure,extrusion pressure and reliability index were discussed,and reasonable ranges of support pressure of shield tunnel faces under seismic action were *** method can provide a new idea for solving the shield thrust parameter under the seismic loading.

关键词： shield tunnel face pseudo-dynamic method seismic effect multi-failure mode support pressure range

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effects of torpedo blasting on rockburst prevention during deep coal seam mining in the Upper Silesian Coal Basin

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Journal of Rock Mechanics and Geotechnical Engineering 2017年第4期9卷 694-701页

作者： L. Wojtecki P. Konicek J. Schreiber Polish Mining Group Powstanców 30 Katowice 40-039 Poland Department of Geomechanics and Mining Research Institute of Geonics Czech Academy of Sciences Studentska 1768 Ostrava-Poruba 708 00 Czech Republic

In the Upper Silesian Coal Basin(USCB),coal seams are exploited under progressively more difficult geological and mining conditions(greater depth,higher horizontal stress,more frequent occurrence of competent rock layers,etc.).Mining depth,dislocations and mining remnants in coal seams are the most important factors responsible for the occurrence of rockburst *** mining next to the mining edges of neighbouring coal seams is particularly *** levels of rockburst hazards are minimised via the use of rockburst prevention *** active prevention method is torpedo blasting in roof *** blastings are performed in order to decrease local stress concentrations in rock masses and to fracture the roof rocks to prevent or minimise the impact of high-energy tremors on *** estimation of the effectiveness of torpedo blasting is particularly important when mining is under difficult geological and mining *** blasting is the main form of active rockburst prevention in the assigned colliery in the Polish part of the *** effectiveness of blasting can be estimated using the seismic effect method,in which the seismic monitoring data and the mass of explosives are taken into *** seismic effect method was developed in the Czech Republic and is always being used in collieries in the Czech part of the coal ***,this method has been widely adopted for our selected colliery in the Polish part of the coal *** effectiveness of torpedo blastings in the faces and galleries of the assigned longwall in coal seam 506 has been *** results show that the effectiveness of torpedo blastings for this longwall was significant in light of the seismic effect method,which corresponds to the in situ *** seismic effect method is regularly applied to estimating the blasting effectiveness in the selected colliery.

关键词： Rockburst prevention Torpedo blasting seismic effect Upper Silesian Coal Basin(USCB)

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维普期刊数据库

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Application of passive source surface-wave method in site engineering seismic survey

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Earthquake Science 2014年第1期27卷 101-106页

作者： Chaofan Wang Jian Zhang Lihui Yan Hui Liu Dong Zhao Key Laboratory of Computational Geodynamics Chinese Academy of Sciences College of Earth Science University of Chinese Academy of Sciences North China Institute of Geological Engineering Co. Ltd. Geogiga Technology Corp.

Site engineering seismic survey provides basic data for seismic effect analysis. As an important parameter of soil, shear-wave velocity is usually obtained through wave velocity testing in borehole. In this paper, the passive source surface-wave method is introduced into the site engineering seismic survey and practically applied in an engineering site of Shijingshan District. By recording the ubiquitous weak vibration on the earth surface, extract the dispersion curve from the surface-wave components using the SPAC method and obtain the shear-wave velocity structure from inversion. Over the depth of 42 m under- ground, it totally consists of five layers with interface depth of 3.31, 4.50, 7.23, 17.41, and 42.00 m; and shear-wave velocity of 144.0, 198.3, 339.4, 744.2, and 903.7 m/s, respectively. The inversion result is used to evaluate site classification, determine the maximum shear modulus of soil, provide basis for further seismic hazard analysis and site assessment or site zoning, etc. The result shows that the passive source surface-wave method is feasible in the site engineering seismic survey and can replace boreholes,shorten survey period, and reduce engineering cost to some extent.

关键词： Passive source surface-wave method Shearwave velocity Dispersion curve seismic effect Engineering seismic survey

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