Results 181 to 190 of about 2,759,873 (338)

Blasting effects of cross‐fault deep‐buried excavation on adjacent existing tunnel stability

Deep Underground Science and Engineering, EarlyView.
Based on the theoretical analysis of cylindrical wave propagation in a deep rock mass in the fault with a filling layer, the calculation method of peak particle velocity caused by wave propagation in the existing tunnel is established. The viscoelastic characteristics of a rock mass are examined in the analysis.
Shaobo Chai, Lianzeng Chai, Chao Meng, Kai Liu, Lang Song, Shaojie Zheng   +5 more
wiley   +1 more source

Optimal selection of a metro tunnel excavation method using AHP and TOPSIS: a case study of Tehran metro. [PDF]

Sci Rep
Rostami A, Chakeri H, Shahriar K, Mousapour H.   +3 more
europepmc   +1 more source

Mid-America Regional Bargaining Association (Builders Association of Greater Chicago, Mason Contractors Association of Greater Chicago, and Lake County Contractors Association) and Construction and General Laborers District Council of Chicago and Vicinity, Laborers International Union of North America (LIUNA), (2001) [PDF]

, 2001

core   +1 more source

Failure mechanism of the coal wall at the working face based on an eccentric compression mechanical model

Deep Underground Science and Engineering, EarlyView.
In this study, the nonuniform distribution of the bearing pressure in front of the coal wall has been revealed based on in situ monitoring data and numerical simulation results. Therefore, an eccentric compression mechanical model of the coal wall was established to study the deformation and failure characteristics of a coal wall. The slenderness ratio
Maolin Tian, Jiabao Wang, Changsheng Wang, Shijie Sun, Lijun Han, Qingbin Meng, Sunhao Zhang   +6 more
wiley   +1 more source

Experimental Study on Instability of Shotcrete Reinforced Slope Based on Embedded Anchor Sensor. [PDF]

Sensors (Basel)
Ning H, Ou J, Jin J.
europepmc   +1 more source

Form and load transfer aspects of foundation systems: Case‐based implementation and adaptation for buildings

Deep Underground Science and Engineering, EarlyView.
Upon conceptualization of structural behavior, foundations in terms of their form are divided into linear (1D), planar (2D), and volumetric (3D). Regarding the load transfer mechanisms, linear foundation systems are considered vector‐acting, planar foundations are divided into section and surface‐acting, and volumetric ones are recognized as block ...
Abolfazl Eslami, Amirhossein Ebrahimipour, Meysam Imani, Reza Imam, Pinqiang Mo   +4 more
wiley   +1 more source

Investigating the scale effect on strength and failure mechanism of roadway surrounding rock. [PDF]

Sci Rep
Wu J, Xie F, Wang Y.
europepmc   +1 more source

Analysis of the Performance of Two Component Back-filling Grout in Tunnel Boring Machines Operating under Face Pressure [PDF]

, 2010
Borio, Luca, Boscaro, A., Dal Negro, E., Peila, Daniele, Pelizza, Sebastiano, Schulkins, R.   +5 more
core  

Slit tube responses and rock fracture characteristics in slit charge blasting under high in situ stress

Deep Underground Science and Engineering, EarlyView.
In this article, the finite element method‐smoothed particle hydrodynamics adaptive coupling algorithm is applied to numerically simulate and analyze the dynamic response of the slit tube and the crack propagation under high in situ stress. The dynamic response of the slit tube mainly exhibits radial response in the vertical direction of the slit and ...
Zhe Sui, Liyun Yang, Lijun Wu, Chenxi Ding   +3 more
wiley   +1 more source

Mechanism of reverse deformation increase in the virgin coal rib compared to the pillar rib of the gob-side entry in an extra-thick coal seam. [PDF]

Sci Rep
He W, Chen D, Zhu H.
europepmc   +1 more source