Measurement of sub-surface strata behaviour in bord and pillar mining: a case studyRanigunj coalfield (India) has been facing significant problems due to subsidence as a result of underground mining of coal seams. The occurrence of the thick seams in close proximity, shallow depth, great ...
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 ...
Development of a model to estimate strata behavior during bord and pillar extraction in underground coal miningUnderground coal miningDilationConvergenceUltimate induced stress and cavingInstrumentation and monitoring is undertaken aiming at evaluation of changing values of rock mechanic parameters, namely, ...
The meaning of BORD-AND-PILLAR is of or relating to a system of coal mining in which tunnels are driven in a checkerboard pattern having massive square pillars between them which are gradually cut away as the work proceeds.
Report. 79F, 18T, 120R: Oravecz, KI Coll. Res. Lab. Cham. Mines, ZA Chamber of Mines of South Africa, Res. Report No 40–73 Oct. 1973, 224Pdoi:10.1016/0148-9062(75)91150-XELSEVIERInternational Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts...
aI follow the instructions and write down my answers one by one. 我遵守指示并且逐个写下我的答复。[translate] abord insertion type bord插入类型[translate]
aPapers of the research results to Changping coal mine working face with large mining height and rational coal pillar size design provides the theoretical basis and test basis, and under similar conditions of coal pillar size design has the certain reference value. 研究结果的纸对昌平煤矿工作面以...
In this paper, an attempt has been made to predict stresses developed in the pillars of bord and pillar mining using artificial neural network. A comparison has also been done to compare the obtained results with the boundary element method as well as measured field values. For this purpose, ...
While longwall technology is a relative lead, in underground coal exploitation and bord and pillar or its variant the room and pillar continue to hold its sway, in the underground arena. Of the current global coal production of around 4000 Mt, the share of underground production is about 65%...