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Gob-side entry retaining

WebThe technology for gob-side entry retaining in steep coal seams is still in the development stage. The analysis results of the caving structure of main roof, low influence of gateway’s stability ... WebSep 1, 2024 · Gob-side entry retaining (GER) technique has been extensively practiced in longwall mining operation as it can increase the recovery rate and decrease the waste …

Grouting Technique for Gob-Side Entry Retaining in Deep Mines

WebAug 11, 2024 · Unlike the traditional gob-side entry retention, the gob-side entry retaining by roof cutting cuts off the roof strata of the roadway and the gob using bidirectional concentrated blasting technology [ 1, 2, 3 ]. After the working face is mined, the roof strata of the gob collapse and form a new rib. WebMar 31, 2024 · Based on the application of the retained gob-side entry in a fully mechanized face E2307 headgate, the stress distribution and deformation characteristics ... In order to make clear the pressure relief mechanism and application effect of directional hydraulic fracturing for gob-side entry retaining, the directional hydraulic fracturing was ... raisman catastrophe claims group inc https://boatshields.com

Stability analysis of roadside backfill body at gob-side entry ...

WebApr 8, 2024 · Gob-side entry retaining can improve the coal recovery rate, reduce the excavation rate, and reduce the probability of rock burst, which is an important … WebJan 1, 2024 · When using gob-side entry retaining (GSER) under hard-roof conditions, the roadside support deforms and destroys easily due to the great overburden stress induced by the large length and time of... WebGob side entry retaining is an important pillarless roadway protection technology in coal mining.It can not only increase the recovery rate of resources,but also reduce the amount of excavation in the mine.At present,many mines have implemented gob side entry retaining and achieved good economic benefits.This paper introduced the basic concepts ... raisley insurance

Study of water-conducting fractured zone development …

Category:An Innovative Approach for Gob-Side Entry Retaining in Thick ... - MDPI

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Gob-side entry retaining

Study on the Application of Gob-Side Entry Retaining via Roof …

WebJul 1, 2014 · Effect of gob-side entry retaining. The conclusion from the working face field tests of gob-side entry retaining is that roadway deformation is controlled and meets … WebOct 30, 2024 · Abstract. Gob-area roof rupture movement is a key disturbance factor for gob-side entry retaining. The characteristics of gob-area sequential roof collapse of …

Gob-side entry retaining

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WebDec 1, 2015 · Yuwu coal mine employs an innovative approach to gob-side entry retaining in N2105 panel (Fig. 5a), which is a highly gassy fully-mechanized top-coal caving panel. The inner N2105 intake entry is retained behind of the panel as the air-return gateroad, part of the whole ventilation system. WebMar 1, 2024 · rock of a roadway in gob-side entry retaining is improved by roof cutting and pressure relief, and it is concluded that the large amount of elastic energy stored in the …

WebGob-side entry retaining “Flexible-hard” artificial wall Hard roof Mechanical model 1. Introduction In recent years, gob-side entry retaining technique has been widely used … WebSep 1, 2015 · The structural optimization technology of overlying strata for gob-side entry retaining with hard roof condition has been proposed, which is compounded by roof caving optimization advanced the...

WebFeb 1, 2024 · The entry is first subjected to the stress adjustment induced by gateroad development; then, the side abutment pressure caused by the retreat of the adjacent panel is applied to the entry; after that, the entry undergoes the front abutment pressure induced by the retreat of the current panel. http://yuxiqbs.cqvip.com/Qikan/Article/Detail?id=7103526305

WebGob-side entry retaining, also termed as non-pillar mining, plays an important role in saving coal resources, high production and efficiency, extending the service life of mine and improving the investment benefit.

WebNov 1, 2013 · Gob-side entry retaining (GSER), which is retained along a gob by one filling body during the mining period of a longwall face, is a special type of entry that is substantially affected by... raisman crosswordWebIn the gob-side entry retaining technology of roof cutting and pressure relief, one side of the roadway is solid coal, and the other side is the rock block caving area in the goaf. The key block B structure will be formed in the rock section of the retained roadway roof. raisman chainsawWebDec 31, 2024 · The gob-side entry retaining will be continuously affected by the sinking and collapse of the roof in the goaf, so in engineering practice [ 13, 14, 15 ], there are … outward hound agilityWebMar 19, 2024 · 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 … outward horror spearWebOct 1, 2024 · In the paper, longwall mining based on no-pillar mining technique with automatically formed gob-side entry retaining is proposed. The concept and key … outward holy mission 4WebDec 1, 2015 · Yuwu coal mine employs an innovative approach to gob-side entry retaining in N2105 panel (Fig. 5a), which is a highly gassy fully-mechanized top-coal caving panel. … raisman crossword clueWebApr 8, 2024 · Gob-side entry retaining can improve the coal recovery rate, reduce the excavation rate, and reduce the probability of rock burst, which is an important technology to achieve continuous mining without coal pillars. Its technical advantages and economic benefits are significant [ 1 – 3 ]. outward hound agility kit