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
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