Results 11 to 20 of about 749,321 (144)

Deformation control of asymmetric floor heave in a deep rock roadway: A case study

International Journal of Mining Science and Technology, 2014
Abstract In order to control asymmetric floor heave in deep rock roadways and deformation around the surrounding rock mass after excavation, in this paper we discuss the failure mechanism and coupling control countermeasures using the finite difference method (FLAC3D) combined with comparative analysis and typical engineering application at Xingcun ...
Xiaoming Sun
exaly   +2 more sources

Analysis and treatment of invert uplift in a long span tunnel in weak mudstone [PDF]

Scientific Reports
To address the invert heave issue in large-span tunnels traversing fully weathered, water-rich cretaceous mudstone in western China’s complex geological zones, the asymmetric invert heave mechanism was investigated and corresponding treatment measures ...
Junwu Chen, Zuowei Hao, Zhiyun Deng, Baoguo Liu, Xiaomeng Shi   +4 more
doaj   +2 more sources

Asymmetric floor heave mechanism and groove cutting pressure relief control technology in mining roadways

Gong-kuang zidonghua
In mining roadways located between solid coal and small coal pillars, the problem of asymmetric floor heave is severe due to the influence of factors such as asymmetric support pressure, plastic deformation of small coal pillars, and weak floor strata ...
HUANG Yutong, ZANG Chuanwei, BAI Yongrui, ZHANG Fan   +3 more
doaj   +2 more sources

Floor Heave Mechanism and Control Technique of Water‐Rich Soft‐Rock Roadway in Thick Coal Seam

Energy Science & Engineering
The severe deformation of the surrounding rock of the coal floor in Shanghaimiao mining area is affecting the safe, efficient production of mine wells in this region.
Fulian He, Wenli Zhai, Weixin Liu, Ning Sun, Jiayu Song, Jianlong Zhang, Yanhao Wu   +6 more
doaj   +2 more sources

Research on Theory and Technology of Floor Heave Control in Semicoal Rock Roadway: Taking Longhu Coal Mine in Qitaihe Mining Area as an Example [PDF]

, 2022
As one of the most common disasters in deep mine roadway, floor heave has caused serious obstacles to mine transportation and normal production activities. The third section winch roadway in the third mining area of Qitaihe Longhu coal mine has a serious
Xuming Zhou, Zhou, Xuming,, Sheng Wang, Meng, Jingjing,, Zhang, Linhan,, Zhen Li, Li, Xuelong,, Dongdong Pu, Linhan Zhang, Jingjing Meng, Wang, Longkang,, Li, Zhen,, Xuelong Li, Longkang Wang, Wang, Sheng,, Pu, Dongdong,   +15 more
core   +1 more source

Study on floor heave mechanism and control technology of roadway based on slip line field theory

矿业科学学报, 2021
Based on the slip line field theory, the slip line field model of roadway floor is established.Taking 1021 roadway of Huipodi coal mine in Shanxi Province as the engineering background, the mechanism of asymmetric floor heave of roadway is studied, and ...
Cheng Hui, Zhao Hongbao, Xu Jianfeng, Qin Fengyuan, Zhang Yixiao, Hu Linfeng   +5 more
doaj   +1 more source

Study on the asymmetric floor heave failure mechanism of deep roadway and control technology with steel pile

Computational Particle Mechanics
Hao Gong, Wenkai Ru, Pingkuang Luo
exaly   +2 more sources

Deformation analysis and support optimization of adit surrounding rock under overburden load disturbance

Gong-kuang zidonghua, 2023
The traditional convergence instrument, 3D laser scanning and other monitoring technologies for the deformation of surrounding rock in the mine roadway can not meet the comprehensive monitoring requirements of complex projects.
CHAI Jing, LIU Hongrui, ZHANG Dingding, LIU Yongliang, HAN Zhicheng, TIAN Zhicheng, ZHANG Ruixin   +6 more
doaj   +1 more source

Mechanics Model of Floor Heave: Case Study on Thin Coal Seam with Soft Roof and Floor

, 2023
The fully mechanized caving roadway’s floor heave has a significant impact on the stability of the narrow coal pillars, the filling body next to the roadway, as well as the entire roadway.
Francisco Chano Simao, Peng Huang, Guohui Ren, Jing Xie, Meng Li, Chengyi Zhao   +5 more
core   +1 more source

An impedance approach to reduce the contact-instability whilst drilling with active heave compensation [PDF]

, 2012
The bit-bounce, or contact-instability, phenomenon which occurs in the drill string suspended from a floating vessel with an active drill string compensator to maintain a steady weight on the drill bit is investigated.
Hatleskog, Jan, Dunnigan, Mathew Walter
core   +1 more source