Results 1 to 10 of about 364,116 (298)

Experimental and simulation studies on damage characteristics, crack development patterns, and strength reduction mechanisms of sandstone under laser irradiation

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
In order to explore the damage characteristics and crack development laws of hard rock under laser irradiation, laser irradiation experiments on sandstone were conducted considering the interaction of three laser parameters: spot diameter, laser power ...
Junjun Liu, Chuo Zhang, Lei Yang, Xuemin Zhou, Jing Xie, Bengao Yang, Zhiqiang He, Mingzhong Gao   +7 more
doaj   +1 more source

SHPB Test and Microstructure Analysis on Ready-Mixed Concrete in Uniaxial Load and Passive Confining Pressure States

Shock and Vibration, 2019
Ready-mixed concrete has been used as a support in mine roadways, where the impact load of blasting excavation can cause damage to the concrete support of the roadway. However, limited studies are available on the effect of water content, storage period,
Jing-shuang Zhang, Xue-lei Duan, Zi-yan Yang   +2 more
doaj   +1 more source

Searching for the Annual Modulation of Dark Matter signal with the GENIUS-TF experiment

, 2003
The annual modulation of the recoil spectrum observed in an underground detector is well known as the main signature of a possible WIMP signal. The GENIUS-TF experiment, under construction in the Gran Sasso National Laboratory, can search for the annual ...
A. Dietz, Benoit, Bernabei, Bernabei, Bernabei, C. Tomei, Cebrián, Drukier, Freese, H.V. Klapdor-Kleingrothaus, Hasenbalg, I. Krivosheina, Kihm, Klapdor-Kleingrothaus, Klapdor-Kleingrothaus, Lewin, Majorovits, Probst, Ramachers, Saab, Sarsa   +20 more
core   +1 more source

Elastoplastic analysis on deformation and failure characteristics of surrounding rock of soft-coal roadway based on true triaxial loading and unloading tests

Scientific Reports
Since accidents such as roof caving, rock fragmentation, and severe deformation are particularly likely to occur during roadway excavation in soft and thick coal seams, grasping the range and distribution of deformation and fracturing of surrounding rock
Chongyang Jiang, Lianguo Wang, Jiaxing Guo, Shuai Wang   +3 more
doaj   +1 more source

Induced eddy currents characteristics of coal gangue-based functional concrete in compression process

Meitan kexue jishu
Coal gangue-based cemented structures （CGCS） have been widely used in underground engineering. Due to the complex environment and limited space, there is still no effective method to monitor structural health in under-ground engineering.
Meng XIAO, Feng JU, Zequan HE, Pai NING, Tengfei WANG, Dong WANG   +5 more
doaj   +1 more source

The progress of special fracturing technology for unconventional natural gas rock reservoirs

矿业科学学报
This paper systematically reviews the evolution and current state of special fracturing technology. Through comparative analysis of their applicability under various geological conditions, quantitative evaluation of production enhancement performance ...
LUO Ning, WEI Yucheng, CHAI Yabo, ZHOU Jianan, WANG Yiming, LIAO Yucheng, ZHANG Hu, LIN Chen, MA Guangrui   +8 more
doaj   +1 more source

Rock splitting with pyrotechnic compositions and secondary propellants [PDF]

MATEC Web of Conferences
In some cases of resources extraction, as well as in construction at industrial and urbanized territories, commercial explosives are not safe enough for the surroundings with regard to the generated fly-rocks, air-blast, toxic fumes, seismic waves and ...
Shishkov Petar, Stoycheva Nadezhda, Penev Vladimir   +2 more
doaj   +1 more source

DUNE: Status and Perspectives

, 2018
The Deep Underground Neutrino Experiment (DUNE) provides a rich science program with a focus on neutrino oscillations and other beyond the standard model physics.
Brailsford, D.
core  

Analysis and Prediction of Deformation of Shield Tunnel Under the Influence of Random Damages Based on Deep Learning

Buildings
Shield tunnels in operation are often affected by complex geological conditions, environmental factors, and structural aging, leading to cumulative damage in the segments and, consequently, increased deformation that compromises structural safety.
Xiaokai Niu, Yuqiang Pan, Wei Li, Zhitian Xie, Wei Song, Chengping Zhang   +5 more
doaj   +1 more source

General Report of TC204 Underground Constructions

, 2013
This paper presents the general report of the TC204 session “Underground Constructions on Soft Ground” of the 18th International Conference on Soil Mechanics and Geotechnical Engineering. A total of 27 papers were assigned for this session, they were divided in six general topics and reviewed briefly in this report. Apart from the regular topics of the
Gerheim Souza Dias, Tiago, Bezuijen, Adam   +1 more
openaire   +2 more sources