Results 111 to 120 of about 12,962 (293)
RESULTS ON THE CMB7 RECEPTOR MODELLING IN THE VAAL TRIANGLE
Clean Air Journal, 1996 J.P. Engelbrecht +3 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian +6 more
wiley +1 more source
, 2020 The Sungun copper-molybdenum operation in Iran uses a typical copper-molybdenum flowsheet to produce separate copper and molybdenum concentrates through flotation and regrinding of the rougher concentrates arising from the primary circuit.
M. Abdollahi (17681295) +5 more
core +1 more source
MineralsTin-Copper polymetallic ore is a type of typical ore that cassiterite is closely associated with sulfide minerals. In mineral processing of tin–copper polymetallic ore, flotation is generally used to recover valuable sulfide minerals, while gravity separation is used to recover cassiterite.
Xiaolu Ye, Xiong Tong, Xian Xie
openaire +1 more source
Deep Underground Science and Engineering, EarlyView.An analytical framework delivers a closed‐form stress solution for lined compressed air energy storage chambers, enabling the determination of the minimum safe burial depth. The solution quantitatively evaluates lining support effectiveness, offering a reliable tool for chamber design and optimization.
Zeyuan Sun +3 more
wiley +1 more source
Process Mineralogy of Flotation Products of a Copper-molybdenum Ore in Jiama, Xizang
Kuangchan zonghe liyongThe process mineralogy was studied on hornstone and skarn copper-molybdenum ores and the copper and molybdenum concentrates was obtained by separating flotationin Jiama, Xizang. The research shows that the hornstone copper-molybdenum ore contains Cu 0.38%
Jinming GUO +6 more
doaj +1 more source
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 +4 more
wiley +1 more source
Experimental Study on Flotation of a Micro-fine Arsenopyrite-type Gold Ore in Central Asia
Kuangchan zonghe liyongAgainst the backdrop of increasing global gold demand and the depletion of easily treatable gold resources, the development of refractory gold ores has become increasingly important.
Wenpu ZHANG +5 more
doaj +1 more source
Deep Underground Science and Engineering, EarlyView.Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu +4 more
wiley +1 more source