Results 41 to 50 of about 26,696 (230)
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
doaj +1 more source
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
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
Sustainability, 2022 In order to determine the rational width of coal pillars and study the surrounding rock control technology of gob side entry driving with a narrow coal pillar, this paper first calculates the width of narrow coal pillar according to limit equilibrium theory; after that, the lateral support pressure and plastic zone development of the goaf is analyzed ...
Qingliang Chang +7 more
openaire +1 more source
Stability Control Mechanism of High‐Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling [PDF]
Advances in Civil Engineering, 2021 Large deformation of roadway and coal bump failures have always been the focus in deep underground engineering. By considering the Lu’an mining district in China, the failure mode and stability improvement process of high‐stress roadways were analysed with the field tests and numerical simulations.
Fuzhou Qi +6 more
openaire +2 more sources
Frontiers in Earth ScienceChina’s coal mines are mainly underground mines, and a large number of roadways have to be excavated underground. It is of great significance for coal mine production to adopt safe and reasonable roadway support methods.
Wanwei Fang +7 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
doaj +1 more source
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
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 +6 more
wiley +1 more source