Results 81 to 90 of about 12,296 (207)

Investigation Into the Evolutionary Characteristics of Damage in Rock Strata at the Base of Soft, High‐Gas Coal Seams Under High In Situ Stress During Permeability‐Enhancing Blasting

open access: yesEnergy Science &Engineering, Volume 13, Issue 11, Page 5645-5659, November 2025.
This study established a bidirectional loading gas‐solid coupling blasting simulation system capable of multidimensional characterization in the laboratory, revealing the core mechanism by which in situ stress significantly inhibits the expansion of explosion cracks in deep soft coal floor blasting for enhanced permeability. The research indicates that
Jianyu Zhang   +5 more
wiley   +1 more source

Confirmation of natural gas explosion from methane quantification by headspace gas chromatography-mass spectrometry (HS-GC-MS) in postmortem samples: a case report [PDF]

open access: yes, 2018
A new analytical approach for measuring methane in tissues is presented. For the first time, the use of in situ-produced, stably labelled CDH3 provides a reliable and precise methane quantification.
Augsburger, M., Varlet, V.
core  

Engineering Practice of Inclined Longwall Roof Cutting and Pressure Relief Gob‐Retaining Roadway Technology in Feitian Coal Mine

open access: yesEnergy Science &Engineering, Volume 13, Issue 11, Page 5660-5671, November 2025.
Feitian Coal Mine Inclined Longwall Roof Cutting and Pressure Relief Gob‐Retaining Technology: Research Background, Core Innovations and Future Directions. ABSTRACT To address the issues of tight mining‐excavation scheduling and challenging gas management in coal mines, this study proposes a technical scheme for inclined longwall roof cutting and ...
Xianbi Xu   +3 more
wiley   +1 more source

Soft coal solid–gas coupling similar material for coal and gas outburst simulation tests

open access: yesJournal of Geophysics and Engineering, 2018
The adsorption, permeability properties, and damage evolution of internal cracks are often not considered in simulation tests for coal and gas outbursts. Therefore, in previous studies of similar materials, the materials used may not be similar in the properties mentioned above.
Sheng-quan He   +3 more
openaire   +1 more source

Effect of Deviatoric Stress on Deformation Energy of Tectonic Coal: A Modified Energy Model Considering Nonlinearity

open access: yesEnergy Science &Engineering, Volume 13, Issue 11, Page 5713-5730, November 2025.
Construction of nonlinear deformation energy. ABSTRACT The deformation energy stored in soil‐like tectonic coal plays a critical role in coal and gas outbursts. Unlike hard rocks, tectonic coal exhibits pronounced stress–strain nonlinearity, invalidating traditional elastic energy models.
Chenghao Wang   +4 more
wiley   +1 more source

Study on Relationships between Coal Fractal Characteristics and Coal and Gas Outburst

open access: yesProcedia Engineering, 2011
AbstractThe influence factors for the coal and gas outburst can be divided into two categories. They are external factors and internal factors, respectively. The external factors include in-seam gas pressure, geological structure and so on, while the internal factors are mainly the coal characteristics themselves.
Zhang, S.   +4 more
openaire   +1 more source

Analysis of world experience of determining the basic criteria of outburst danger [PDF]

open access: yes, 2015
Проведено аналіз світового досвіду щодо раптових викидів та газових емісій в шахтах. Визначено найбільш важливі параметри, що характеризують схильність вугільного пласта до викидів. Встановлено фактори, що впливають на викиди в шахтах.
Бойко, В. В.   +1 more
core  

Experimental study on compound dynamic disaster in deep coal rock under gas and stress loading and unloading [PDF]

open access: yes
To explore the occurrence mechanism of compound dynamic disasters in coal rocks, this study conducted a true triaxial test simulating gas extraction and stress loading and unloading conditions. To differentiate behaviors among disaster types, the effects
Huang, Lei   +5 more
core   +1 more source

Conjecture about mechanism of butterfly-shape coal and gas outburst in excavation roadway

open access: yes矿业科学学报, 2017
Referring to roadway butterfly shape rock burst mechanism and nonlinear dynamic system theory, a conjecture about butterfly-shape coal and gas outburst mechanism in excavation roadway has been made, In this conjecture, the mechanical essence of coal and ...
Ma Nianjie   +5 more
doaj  

The Influences of Structural Deformation on Coal and Gas Outburst Types

open access: yesChemical Engineering Transactions, 2017
Geological structure is the main control factor of coal and gas outburst. Characteristics and types of coal and gas outburst usually have great different in regions of different structural deformation patterns.
Deyu Xu
doaj   +1 more source

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