Results 41 to 50 of about 2,891 (238)
Research on gob-side entry retaining using high-strength lightweight block
IOP Conference Series: Earth and Environmental Science, 2019 In order to effectively reduce the tension between the mining face and the tunnelling connection and increase the underground work efficiency. The engineering background of this paper is - 4111 face of Jingang Coal Mine, located in Dazhou, West China's Sichuan Province.
Changlong Zhou, Hong Li
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Energies, 2023 Gob-side entry retaining by roof cutting, a pillarless mining technique, plays a critical role in maintaining continuous production, rapid connection, and enhancing the coal recovery rate in fully mechanized top coal caving working faces.
Yongkang Yang +3 more
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Application of High‐Strength Lightweight Concrete in Gob‐Side Entry Retaining in Inclined Coal Seam [PDF]
Advances in Materials Science and Engineering, 2020 Gob‐side entry retaining (GSER) is a popular no‐pillar mining technology that can increase coal recovery rate. We propose the application of high‐strength lightweight (HSLW) concrete to construct the gob‐side support body (GSSB) in NO. 411 inclined working face of Jingang Coal Mine. Firstly, the mechanical model of retained roadway was established, and
Daoyong Zhu +3 more
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Novel Application of the Roof-Cutting-Type Gob-Side Entry Retaining in Coal Mine [PDF]
Mathematical Problems in Engineering, 2021 In this study, the roof-cutting-type gob-side entry retaining is introduced, and its application in medium-thickness coal seams is studied. Based on the analysis of the construction procedure and principle, the mechanical model of the retained roadway structure and cantilever beam formed by roof cutting was established, and the support resistance and ...
Jiong Wang +4 more
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Advances in Civil Engineering, 2019 Gob-side entry retaining is an environmentally friendly nonpillar mining technology with high efficiency and safety. With the continuous exploration of the gob-side entry retained by filling (GERF) with roadside supports, the GERF has enabled nonpillar ...
Enze Zhen +3 more
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Advances in Materials Science and Engineering, 2020 The stress concentration of gob-side entry surrounding rock is a hot topic in coal mining. In this paper, through theoretical analysis and numerical simulation, the pressure relief mechanism of the gob-side entry retaining by roof cutting and pressure ...
Yong Zhang +5 more
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Asymmetric Damage Mechanisms and Prevention Technology in Large-Section Gob-Side Entry Retaining
Sustainability, 2022 Based on the deformation and damage characteristics of the surrounding rock in a large-section gob-side entry retaining and combined with field observations and an analysis of the dominant factors, an overall deformation control plan is formulated. The plan mainly includes a structure of high strength, high stiffness and high ductility for roadside ...
Hongzhi Yang +4 more
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An Innovative Approach for Gob-Side Entry Retaining With Thick and Hard Roof: A Case Study [PDF]
, 2018 An innovative roadway layout in a Chinese colliery based on gob-side entry retaining (GER) with thick and hard roof (THR) was introduced. Suspended roof is left with a large area in GER with THR, which leads to large area roof weighting (LARW).
Hai Wu +6 more
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Large Section of Soft Rock Gob‐Side Entry Retaining Surrounding Rock Control
Advances in Civil EngineeringWhen cutting roof and pressure relief, the impact of blasting is especially obvious on the integrity of the roof of a large‐section soft‐rock roadway. The reasonable parameters of blasting roof cutting were studied through using Xiaohezui coal mine ‐12110 roadway as the engineering background. The LS‐Dyna simulation results show that: Interval blasting
Xizhi Wang +6 more
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Determination of cyclic filling length in gob-side entry retained with roadside filling and its application [PDF]
Shock and Vibration, 2020 Abstract Gob-side entry retained with roadside filling (GER-RF) plays a key role in achieving coal mining without pillar and improving the coal resource recovery rate. Since there are few reports on the cyclic filling length of GER-RF, a method based on the stress difference method is proposed to determine the cyclic filling length of GER-RF ...
Zizheng Zhang +5 more
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