In any cave mining method a horizontal slice of rock is mined out at the base of the block to be caved by drilling and blasting. Once a sufficiently large area has been mined continuous caving initiates and propagates through the block. High stress levels are set up in the abutment zone around the perimeter of the caving area that can affect tunnel stability to a distance of 20 metres from the ...

Both the deformation characters and the failure mode of the large cross-sectional longwall installation roadway under compound roof are becoming an emergent issue than ever before due to the rapid development of modern mining equipment. Various engineering applications have revealed that the insufficient design and inappropriate support technology are the main reasons for the fatal accidents as...

This paper is based on the condition where layered argillaceous cemented sandstone as an engineering background met by No. 207 fully mechanized working face open-off cut (Wanli 1 Coal Mine). Through mechanical theory analysis and field practice, safety problem of large-span roof supporting structure was analyzed. The caving arch height roadway in obtained mechanism instability surrounding rock ...

In view of the occurrence conditions inclined coalbed, deformation and failure characteristics main roof will affect safe production working face. Therefore, study in coalbed has guiding significance for control surrounding rock. This paper takes II1042 face Taoyuan Coal Mine as research background, adopts methods theoretical analysis, numerical calculation, field practice to analyze evolutiona...

A daunting mine disaster took place in 13 May 2014 at Soma and 301 men lost their lives. Brief information about the Eynez coal mine and some of the inherent characteristics of the field in terms of their effects on mining are presented. This paper basically concentrates on the factors that played an important role in the occurrence of this disaster. Progress of mine fire, firefighting, and res...