Results 51 to 60 of about 3,284,481 (140)
International Journal of Mining Science and Technology, 2015 New solid backfill mining technology provides unique technical advantages for “three-under” coal mining which refers to coal resources trapped under buildings, railways, and water bodies.
Qiang Zhang +4 more
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, 2021 The gob-side entry retaining plays an important role in improving working face ventilation, alleviating working face connection, and increasing mining revenue.
Boyang Li +4 more
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Discussion on stability analysis and support technology of surrounding rock of gob-side entry retaining [PDF]
, 2019 In order to further analyze the stability and control mechanism of surrounding rock in the gob-side entry retaining, the slip instability coefficient k1 and compression failure coefficient k2 are proposed by the mechanical analysis of the established ...
Huiqiang Duan, Wenxiang Zheng
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Energies, 2022 According to the development requirements of green mining of coal resources, it is imperative to improve the extraction rate of coal and the application of safe and efficient mining technology.
Shengrong Xie +8 more
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Short Cantilever Rock Beam Structure and Mechanism of Gob-Side Entry Retaining Roof in Reuse Period
, 2020 In the reuse stage of a gob-side entry retaining, failure of the structure and stability of the main roof have a significant effect on the safety of the advanced support and ventilation space at the working face.
Chunlei Zhang +6 more
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Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT Healthcare derived polystyrene waste represents a growing and under addressed fraction of plastic waste streams due to contamination risks and limited recyclability. This study aims to investigate the valorization of waste polystyrene foam through catalytic and noncatalytic pyrolysis pathways to evaluate product yield distribution and identify
Salman Khan +4 more
wiley +1 more source
Advances in Civil Engineering, 2020 This paper studies and introduces the successful case of gob-side entry retaining technology and the typical mining pressure law in Luan mining area, which is the main mining coal seam in Qinshui coalfield. Qinshui coalfield has an estimated coal reserve
Meng Zhang +6 more
doaj +1 more source
Evolutionary morphology of the haplorhine hamate
The Anatomical Record, EarlyView.Abstract Primates adopt a variety of hand postures during an impressive diversity of locomotor and manipulative behaviors. Morphological research has found that elements of the hand skeleton, such as the hamate, hold key information for inferring hand use and locomotor kinematics in extinct species.
Laura E. Hunter +4 more
wiley +1 more source
Research on the support of roadways with different roof cutting angles in gob-side entry retaining
Scientific ReportsGob-side entry retaining is a coal no-pillar mining technology, which can recover coal pillar resources and reduce the quantity, and cost of roadway excavation.
Xiaoyu Wu +4 more
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, 2022 To improve the technical system of the roof cutting pressure releasing gob-side entry retaining technology (RCPRGERT) and provide reference for the adaptive promotion and optimization of the new technology, the entry support system mechanism with ...
Tianyi Zhang +9 more
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