Results 101 to 110 of about 2,753 (283)
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
The physical properties of coal measures rocks and their bearing on the technique of roof bolting [PDF]
, 1957 The investigations here described can be sub-divided into four main sections, viz. (A) The Physical Properties of Coal Measures Rock, (B) Photo-elastic Investigations, (C) Underground Observations and (D) The Testing of Plaster Models.
Johnston, Archibald G
core
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
Vegetable ResearchTipburn (TB) is a devastating physiological disorder in lettuce (Lactuca sativa) linked to localized calcium (Ca2+) deficiency. While biparental population studies have identified tipburn-linked QTLs, the core genetic mechanisms across diverse germplasm ...
Ivan Simko, Manuel Ospina-Giraldo
doaj +1 more source
LsHSP70 is induced by high temperature to interact with calmodulin, leading to higher bolting resistance in lettuce. [PDF]
Sci Rep, 2020 Liu R +6 more
europepmc +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
Fatigue behavior of welded connections enhanced with ultrasonic impact treatment (UIT) and bolting. [PDF]
C1610A common problem in bridges employing welded steel girders is development of fatigue cracks at the ends of girder coverplates. Fatigue cracks tend to form at the toes of the transverse welds connecting a coverplate to a girder flange since this ...
Vilhauer, Brian +5 more
core
Deep Underground Science and Engineering, EarlyView.Aluminum‐enhanced afterburning renders AE explosives more hazardous than conventional ones. Corrugated steel linings reduce far‐field AE blast overpressure by ~50% through wave reflection and dissipation. The developed model accurately predicts peak pressure (<10% error) and arrival time (<3% error), supporting protective design.
Zhen Wang +5 more
wiley +1 more source
Results in EngineeringRobust and lightweight joining techniques are crucial for good performance and safety in advanced engineering applications, particularly in the automotive and aerospace sectors.
Murat Demiral, Ali Mamedov
doaj +1 more source
Through‐bolting effect on Stiffened Angle Joints
, 2019 The rotational stiffness and resistance of steel structural joints are fundamental parameters according to Eurocode 3. Many experimental tests do not take into account the contributions of the panel zone since they have considered a very stiff column ...
Loureiro, Alfonso +3 more
core