Results 101 to 110 of about 63,148 (319)

Effects of elevated ground temperatures on properties of cement grouts for deep rock grouting

Deep Underground Science and Engineering, EarlyView.
When the temperature is up to 35°C, significant improvement in rheological parameters, acceleration of grout setting, and an increase in the rheological time dependence of thick cement grout can occur, but there may be a slight effect on the initial grout flowability and the nature of shear thinning.
Zhipeng Xu, Jianping Sun, Runguo Li, Lei He, Changwu Liu   +4 more
wiley   +1 more source

Experimental study on the damage characteristics of cyclic disturbance and acoustic emission characteristics of different types of sandstones under high stress in deep mines

Deep Underground Science and Engineering, EarlyView.
The mechanical characteristics of three different types of sandstones under high stress levels are studied. The degree of fragmentation of specimens increases with the applied stress level. The acoustic emission counting of different types of sandstones presents three stages: weakening, stabilizing, and surging.
Yujing Jiang, Bin Liang, Dong Wang, Ling Dong, Hengjie Luan, Changsheng Wang, Jiankang Liu   +6 more
wiley   +1 more source

Damage evolution of surrounding sandstone rock under charging–discharging cyclic loading in the natural gas storage of abandoned mines based on the discrete element method

Deep Underground Science and Engineering, EarlyView.
This study established a true triaxial numerical model of rock mass with the discrete element method and explored the crack evolution of surrounding rock of underground roadway gas storage during cyclic loading and unloading and the damage numerical model considering residual deformation.
Zhanguo Ma, Junyu Sun, Peng Gong, Erwin Oh, Jun Hu, Ruichong Zhang   +5 more
wiley   +1 more source

Study on efficient mineralization method of fly ash based on three-stage division in reaction process

Meitan kexue jishu
Due to alkaline earth metal oxide such as calcium and magnesium being existed in the fly ash, its slurry is alkaline. It’s easy to pollute the underground water when the slurry was filled in the goaf.
Qiuge YU, Xiwen YIN, Zhenli FAN, Zhichao GAN, Yaokun FU   +4 more
doaj   +1 more source

In situ loading of a pore network model for quantitative characterization and visualization of gas seepage in coal rocks

Deep Underground Science and Engineering, EarlyView.
Fine modeling of a three‐dimensional fracture structure under dynamic loading of coal is carried out. The streamline distribution law of pressure and velocity field in the loading process of the coal specimen is analyzed, the absolute permeability of the coal specimen is calculated, and the feasibility of the pore network model algorithm and finite ...
Huazhe Jiao, Xi Chen, Tiegang Zhang, Quilligan Michael, Yixuan Yang, Xiaolin Yang, Tongyi Yang   +6 more
wiley   +1 more source

Optimization of Binocular Vision Ranging Based on Sparse Stereo Matching and Feature Point Extraction

IEEE Access
In recent years, the advancement in ranging accuracy and distance requirements in the ship industry has underscored the paramount importance of controlling ranging error.
Zhiliang Chen, Wei Zhang, Shilin Li, Kaixiong Zhu, Huiyuan Chen   +4 more
doaj   +1 more source

The Coal-mining Industry [PDF]

, 1921
H. LOUIS
openalex   +1 more source

A comprehensive study on in situ stress field characteristics and changes in rock mechanical properties in deep mines in northeastern Yunnan, China

Deep Underground Science and Engineering, EarlyView.
This paper studies the distribution characteristics of the current in situ stress field in northeast Yunnan Province by using multisource stress data, including in situ stress measurements, focal mechanism solutions, and borehole damage information, and comprehensively determines the in situ stress magnitude and direction in the mining area.
Hui Wang, Bangtao Sun, Cong Cao, Shibo Yu, He Wang, Ye Yuan, Hua Zhong   +6 more
wiley   +1 more source

Health Hazards of Coal Mining [PDF]

, 1944
S. W. Fisher
openalex   +1 more source

Study on damage and failure characteristics of loaded gas‐bearing rock–coal–rock combination structures

Deep Underground Science and Engineering, EarlyView.
The influence of gas on the instability and failure of rock–coal–rock combinations is considered. The damage characteristics of gas‐bearing rock–coal–rock combinations under different confining pressures, axial loading rates, and gas are revealed. A constitutive model for gas‐bearing rock–coal–rock damage considering gas is established.
Feng Du, Kai Wang, Wanyu Yang, Jiazhi Sun, Xiyang Fang, Yiyang Zhang, Longyong Shu, Liang Wang, Jiaxu Zhou   +8 more
wiley   +1 more source