Results 1 to 10 of about 7,010,769 (298)

Study of the Influence of Clay Minerals on the Mechanical and Percolation Properties of Weakly Cemented Rocks

Geofluids, 2022
The weakly cemented rock layer is easily damaged under the combined effect of seepage and mining disturbance and creates massive engineering disasters. This paper uses the self-designed weakly cemented remodeling mechanism to prepare weakly cemented rock
Shiru Guo, Hai Pu, Mengsen Yang, Ding Liu, Ziheng Sha, Junce Xu   +5 more
doaj   +1 more source

Deformation Characteristics of a Deep Subway Foundation Pit in Hard Rock Strata under a Delayed Supporting Condition

Shock and Vibration, 2023
In this investigation, deformations of a deep foundation pit in hard rock strata, respectively, under delayed and in-time supporting schemes of one-layer transverse reinforced concrete bracings at the top of the foundation pit, one-layer steel bracings ...
Yang Li, Zhanguo Ma, Furong Gao, Peng Gong, Zhiqun Gong, Kelong Li   +5 more
doaj   +1 more source

Experiment and Numerical Simulation of Strength and Stress Distribution Behaviors of Anchored Rock Mass in a Roadway

Geofluids, 2023
Due to the influence of the ground stress, mining disturbance, and other factors, the roadway surrounding rock in deep underground engineering such as mines, tunnels, and underground caverns is prone to looseness and deformation with the excavation of ...
Honghui Zhao, Haijian Su, Xiaofeng Qin, Kai Zhang, Yu Jiang, Wenbo Wang   +5 more
doaj   +1 more source

Failure Mechanism of Anchored Rock under Constant Resistance Values of Cable Based on Particle Flow Code

Geofluids, 2022
Focusing on a constant resistance (CR) cable, using particle flow code (PFC) software, the constant resistance characteristics of the cable are replaced by the servo control of the pallet, and the compressive mechanical properties of rock anchored on the
Xiaoming Sun, Li Cui, Yong Zhang, Zuoxun Jiang, Lei Wang   +4 more
doaj   +1 more source

The Numerical Stimulation of Methane-Air Mixing Characteristics in Wellbore during the Air Jet Injection

Geofluids, 2022
At present, in situ blasting fracturing with formation methane is identified as an effective method for shale gas stimulation. In this paper, based on the in situ temperature and pressure conditions, a horizontal wellbore model filled with methane was ...
Zhixiang Tao, Chengzheng Cai, Zengxin Zou, Yugui Yang, Yinrong Feng   +4 more
doaj   +1 more source

Numerical simulation study on shear resistance of anchorage joints considering tensile–shear fracture criterion of 2G-NPR bolt

International Journal of Coal Science & Technology, 2023
2G-NPR bolt (the 2nd generation Negative Poisson’s Ratio bolt) is a new type of bolt with high strength, high toughness and no yield platform. It has significant effects on improving the shear strength of jointed rock mass and controlling the stability ...
Shulin Ren, Zhigang Tao, Manchao He, Mengnan Li, Qiru Sui   +4 more
doaj   +1 more source

Study on the Constant Resistance Coupling Support Technology for Rock Column at the Intersection Point of Deep Soft Rock Large Section Roadway: A Case Study in China

Shock and Vibration, 2022
In order to solve the problem on the serious deformation and failure of the rock column at the intersection of large cross sections in Shiyakou coal mine, based on field engineering geomechanics analysis, theoretical analysis, and three-dimensional ...
Huichen Xu, Yong Zhang, Jinkun Yang, Jiangbing Li, Xiaoming Sun, Cheng Xie   +5 more
doaj   +1 more source

Experimental Study of the Water-Sediment Two-Phase Seepage Characteristics in Rock Fractures and the Influencing Factors

Geofluids, 2021
The water-sediment two-phase seepage in coarse fractures is one of the major factors to trigger mine water inrush disasters. Based on seepage mechanics theory, a mechanical model of the water-sediment two-phase seepage in coarse fractures was established.
Kui Di, Ming Li, Xianbiao Mao, Zhanqing Chen, Lianying Zhang, Yu Han   +5 more
doaj   +1 more source

Experimental Study on Compression and Torsion Fracture within 3D Printed Cementation-Weak and Porosity-High Sandstones

Geofluids, 2023
Cretaceous sandstones have weak cementation and high porosity while exhibit a high apparent brittleness. Compression and torsion (C-T) fractures are widely distributed in Cretaceous sandstones due to asymmetric tectonic convergence action.
Xiaodong Zhao, Xu Cai, Xingya Zhou, Zejin Lai, Qingwen Zhong, Zhaoxiang Chu, Guoqing Zhou, Hong Li   +7 more
doaj   +1 more source

Impact of cooling rate on mechanical properties and failure mechanism of sandstone under thermal–mechanical coupling effect

International Journal of Coal Science & Technology, 2023
High geo-temperature is one of the inevitable geological disasters in deep engineering such as resource extraction, space development, and energy utilization.
Pingye Guo, Peng Zhang, Mohua Bu, Hang Xing, Manchao He   +4 more
doaj   +1 more source