Results 51 to 60 of about 56,130 (232)

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

Pore structure tailoring of pillared clays with cation doping techniques

, 1998
Techniques and mechanism of doping controlled amounts of various cations into pillared clays without causing precipitation or damages to the pillared layered structures are reviewed and discussed.
Zhu, HY, Lu, GQ
core   +1 more source

Chromia and chromium sulfide pillared clays differing in pillar density [PDF]

, 1997
Chromia pillared clays differing in pillar density were synthesized from the Li-form of montmorillonite calcined in a controlled manner. These materials were characterized by XRD, TGA, AAS, nitrogen adsorption and their thiophene hydrodesulfurization ...
Mikhail Sychev, Beer, de, V.H.J., Beer, VHJ Vincent de, Santen, van, R.A., Rutger A. van Santen, Sychev, MV, Santen, RA Rutger van, Vincent H.J. de Beer, Sychev, M.V.   +8 more
core   +2 more sources

Physicochemical and Photocatalytic Properties of Fe-Pillared Bentonite at Various Fe Content

Bulletin of Chemical Reaction Engineering & Catalysis, 2016
Iron-pillared bentonites (Fe/Bents) were successfully prepared using a ferric chloride precursor. The prepared samples were characterized using XRD, BET and SEM-EDX.
Is Fatimah, Yuyun Yunani Nurkholifah
doaj   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

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, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Analysis and Comparison of the Microporosity in Al-pillared, Zr-pillared and Ti-pillared Clays

, 1995
The microporous accessibility of three pillared clays (Al-, Zr- and Ti-PILC) and two zeolites as references have been studied. Nitrogen adsorption data obtained at very low relative pressures were used to obtain a thorough characterization of the ...
Gil, A., Grange, Paul, Massinon, A.
core   +1 more source

Analysis of the Structure of Alumina-Pillared Clays by Nitrogen and Carbon Dioxide Adsorption

Adsorption Science & Technology, 2007
Nitrogen and carbon dioxide adsorption methods were used to study the structural properties developed by a series of alumina-pillared clays. The solids were prepared by varying the Al/clay ratio and the calcination temperature of a montmorillonite ...
A. Gil, R. Trujillano, M.A. Vicente, S.A. Korili   +3 more
doaj   +1 more source

Uniaxial compressive strength prediction and ratio parameter optimization of titanium tailings composite backfill materials using intelligent hybrid models

Deep Underground Science and Engineering, EarlyView.
Based on the 90 datasets, ERT and four optimization algorithms were used to build four hybrid models to predict the UCS of the backfill body. The SMA‐ERT model was the most effective model, and it can reliably guide the design of the backfill ratio parameters. Abstract This study analyzed the feasibility of using titanium (Ti) tailings as a backfilling
Weijun Liu, Zida Liu, Zhixiang Liu
wiley   +1 more source

Exponentially‐constrained Gaussian mixture model for quantifying vertical development of water‐conducting fracture zones in lithologically stratified mining roofs

Deep Underground Science and Engineering, EarlyView.
This study proposes an exponentially‐constrained Gaussian mixture model (EcGMM) to quantify vertical fracture heterogeneity in stratified roof strata. The model integrates a piecewise exponential decay term capturing global stress dissipation with Gaussian components representing localized fracture intensification at lithological interfaces.
Huiqing Yuan, Zhimin Xu, Weixiao Chen, Chenghang Zhang, Shijie Xiong, Yajun Sun   +5 more
wiley   +1 more source

Harnessing Thin‐Film Solid‐State Electrolytes: Enabling Breakthroughs in All‐Solid‐State Batteries

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Schematic illustration highlighting the advantages of transitioning from traditional thick solid‐state electrolytes (SSEs) to thin‐film SSEs. Thinning the electrolyte enables higher ionic conductivity, reduced interfacial polarization, improved flexibility, compact electrode contact, and enhanced energy density, offering a promising pathway toward high‐
Yitao He, Haoyang Cheng, Li Wang, Xiangming He   +3 more
wiley   +1 more source