Results 151 to 160 of about 28,621 (307)

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

Deep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang, Yonghua Ye, Jianping Zuo, Baojiang Han, Weigang Jiao   +4 more
wiley   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

System aspects of pumping and co-disposal of waste rock and tailings

, 2000
Effective use of co-disposal of waste rock and tailings depends among other things of the use of a high slurry solids concentration so as to minimize segregation of the finest particles. Generalised large-scale loop-results from the GIW Hydraulic Testing
Sellgren, Anders,, Addie, Graeme,
core  

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

Deep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang, Zaobao Liu, Jing Xue, Bo Lu, Wei Zeng, Dengke Zhang   +5 more
wiley   +1 more source

Study on the Recycling of Phosphate Ore Waste Rock and Its Impact on Mortar Properties. [PDF]

Materials (Basel)
Fan R, Mao B.
europepmc   +1 more source

Development and validation of a waste rock dumping optimisation model

, 2009
Waste rock dumps represent among the largest remnant structures of open pit mining operations. They can absorb a large proportion of the mine's operating costs, and can be costly to rehabilitate. Poor design, construction and rehabilitation of waste rock
Topal, Erkan, Williams, David J.
core  

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

Deep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza, Hendrik Grobler, Peter Apata Olubambi, Moshood Onifade, Manoj Khandelwal   +4 more
wiley   +1 more source

Enhancing the hydrophobicity and mechanical integrity of lignocellulosic paper through synergistic integration of terpene-phenolic resin and phosphate waste rock. [PDF]

RSC Adv
Bendalahcen O, Bouhfid R, Qaiss AEK, Alami J, El Achaby M, Semlali FZ.   +5 more
europepmc   +1 more source

Performance assessment of a potential underground thermal storage facility: Case study of the closed mine Prosper‐Haniel in the Ruhr coal mining area in Germany

Deep Underground Science and Engineering, EarlyView.
This study demonstrates the feasibility of an underground closed‐loop thermal storage facility at a post‐mining site, intended for seasonal heat energy storage. Its principal design shows water flow directions in winter and summer (1, 2), heat pumps (3), an upper water reservoir (4), and connecting pipes (5).
Dmytro Rudakov, Oleksandr Inkin
wiley   +1 more source

Temperature effect on seawater leaching of Pb, Zn, and F from waste rock at Ivittuut cryolite mine in South Greenland. [PDF]

Environ Sci Pollut Res Int
Jeremiassen NEO, Jia Y, Hansen V, Friis H, Larsen MB, Olsen M, Ulrich T.   +6 more
europepmc   +1 more source