Results 61 to 70 of about 64,796 (273)
Research on Displacement Failure Characteristics of Deep Roadway Surrounding Rock
IOP Conference Series: Earth and Environmental Science, 2020 Abstract In order to explore the displacement failure characteristics of deep roadway surrounding rock, the surrounding rock stress field model of the uniform stress field in the circular tunnel is simplified. It analyzes the stress evolution features of deep coal rock and discusses the mechanism of zonal disintegration.
openaire +1 more source
, 2021 Severe dynamic disturbance in extrathick coal seam mining has become one of the main factors threatening the stability of roadway surrounding rock.
Fuzhou Qi +3 more
semanticscholar +1 more source
Damage evolution and failure warning in early-age flexible-formwork concrete for underground support
Geohazard MechanicsThe evolution law of mechanical properties and damage characteristics of early-age flexible formwork filling concrete have a decisive influence on the stability control of surrounding rock of large deformation roadway.
Zijun Han +7 more
doaj +1 more source
Deformation Failure and Support Test of Surrounding Rock in Deep Arched Roadway with Straight Wall
Advances in Civil Engineering, 2021 The deformation and failure of the uphill roadway on the 3rd horizontal track in the No. 6 Mine of Pingdingshan Coal Group was taken as the engineering background.
Shuqi Pan +4 more
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Study on Failure Characteristics and Rock Burst Mechanism of Roadway Roof under Cyclic Dynamic Load
Shock and Vibration, 2021 Rock burst is a catastrophic phenomenon that often occurs in underground rock mass engineering. In order to reveal the essence of rock burst of a hard roof in the process of roadway excavation, the particle discrete element method is used to establish a ...
Chunmei Zheng +3 more
doaj +1 more source
Meitan kexue jishu, 2023 The prominent contradiction between high ground stress and low strength of surrounding rock in deep strata of coal mine leads to large deformation and instability disaster after roadway excavation.
Yanhe LI +3 more
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Use of Rock Mass Rating (RMR) values for support designs of tunnels excavated in soft rocks without squeezing problem [PDF]
, 2019 Effect of the rock material strength on the RMR value and tunnel support designs were investigated within this study including site works, analytical and numerical analyses.
Demir, Serhat, Komurlu, Eren
core +1 more source
Research on Stability Control Technology of Mining Roadway Based on Energy Transformation
Geofluids, 2023 The process of roadway surrounding rock deformation and instability is always accompanied by energy changes, and the energy transformation of surrounding rock directly drives its deformation and failure.
Guohua Zhang, Yanwei Duan, Tao Qin
doaj +1 more source
Energy Science & EngineeringExcavation‐induced rock failure and deformation near an underground opening boundary is closely associated with the intermediate principal stress, strain softening and rock mass dilation.
Xinfeng Wang +4 more
semanticscholar +1 more source
, 2021 In view of the large deformation in the roadway of layered surrounding rock, with W22602 return air roadway of Datong No.1 Mine as the engineering background, using the finite-difference software FLAC3D, we explored the influence of the angle of the ...
Ziwen Xu
semanticscholar +1 more source