bord-and-pillar-method网络房柱式开采法 网络释义 1. 房柱式开采法 我的博客 - 鹏程万李 - 网易博客 ... barrier method 柱式开采法 bord and pillar method 房柱式开采法 caving method 崩落开采法 ... lp655.blog.163.com|基于23个网页© 2025 Microsoft 隐私声明和 Cookie 法律声明 广告 帮助 反馈...
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 ...
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 ...
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 ...
aDrifting vapour : This is the pillar for the 4 effects and improving the environment. 漂移的蒸氣: 這是柱子為4個作用和改進環境。[translate] a活着像幽灵 Is living likely the spirit[translate] aShenzhen Interior Decoration Designer Training successful to join and disply in the room 深圳室内装璜设...
A pulverulent material is poured by a hydraulic filling method into the enclosure. This pulverent material preferably comprises light fine ash having hydraulic properties. Owing to the reinforcements embedded in the mass, the structure initially behaves as stabilized earth, but, in the end, the ...
A pulverulent material is poured by a hydraulic filling method into the enclosure. This pulverent material preferably comprises light fine ash having hydraulic properties. Owing to the reinforcements embedded in the mass, the structure initially behaves as stabilized earth, but, in the end, 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...
Development Of Software To Evaluate Roof Fall Risk In Bord And Pillar Method - Depillaring PhaseRoof fall riskparameterssoftwareprobabilityrisk factorRoof fall is one of the major problems of the bord and pillar coal mines during the depillaring phase. Roof fall not only causes considerable ...
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 ...