将“ bord and pillar mining method "自动翻译成 塞尔维亚文 Методарударстванабордуистубовима Glosbe Translate методакопања бодаистубова Google Translate 加 在上下文、翻译记忆库中将“bord and pillar mining method"翻译成 ...
MINING EXCAVATING PROCESS USING THE BORD AND PILLAR METHODnot available for EP0034520of corresponding document: US4412760 There is constructed around pillars of a mine chamber on the ground a rectangular enclosure which is defined by superimposed layers of U-section elements. The concavity of the ...
Underground coal miningDilationConvergenceUltimate induced stress and cavingInstrumentation and monitoring is undertaken aiming at evaluation of changing values of rock mechanic parameters, namely, dilation, load, convergence, and stress, during mining for a safe strata......
Bord and pillar methodEstimation of pillar stress is a crucial task in underground mining. This is used to determine pillar dimensions, room width, roof conditions, and general mine layout. There are several methods for estimating induced stresses due to underground excavations, i.e., empirical ...
It was decided to mine the UG2 orebody with trackless equipment using a bord and pillar mining method. Frank shaft has been mining the UG2 orebody for nearly 5 years. The T-cut mining method was introduced to see if it could improve the grade of the ran of mine (ROM) as well the...
There is constructed around pillars of a mine chamber on the ground a rectangular enclosure which is defined by superimposed layers of U-section elements. The concavity of the latter faces inwardly of the enclosure. A pulverulent material is poured by a hydraulic filling method into the ...
Some investigations into the surface movement due to underground mining by bord and pillar method: Singh, R D Proc 4th Congress International Society for Rock Mechanics, Montreux, 2–8 Sept 1979, Vol 1, P731–736. Publ Rotterdam, A A Balkema, 1979...
which is released by hydraulic filling a powdery material (11), which is preferably formed of fly asha hydraulic characteristics.thanks to the massive reinforcements 22 embedded in the original work is like a land army.but in the long run the material 11 and is consistent, so that finally the...
Roof fall is one of the major problems of the bord and pillar coal mines during the depillaring phase. Roof fall not only causes considerable damage to the mining equipment but also to the miners. To keep in view, development of software is essential for the calculation of roof fall risk...
This study is mainly focused to predict a critical strata movement value for safety of the bord and pillar method of mining, perticularly depillaring.doi:10.1007/s12517-019-4381-5Jena, Satyabadi KumarNatl Inst Technol RaipurLokhande, Ritesh Dharmraj...