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caving line
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  “caving line”译为未确定词的双语例句
     There is a certain angle between caving line and coal seam strike.
     垮落线与煤层走向是一定角度。
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  相似匹配句对
     On-line
     行业在线
短句来源
     On line
     行业在线
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     There is a certain angle between caving line and coal seam strike.
     垮落线与煤层走向是一定角度。
短句来源
     Study on extraction line technology on condition that the double conveyers inlight caving work face
     轻放工作面双运输机条件下调采过折线技术研究
短句来源
     Sublevel shrinkage caving
     基律纳铁矿的分段留矿崩落法
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By means of both similitude test andnumerical simulation, the papercomprehensively studied the destabilizationof the main roof of the stope mined withtop coal caving in gently inclined extrathick seams. It suggests that the generalstructure of the overlying strata is a "bridg-ing structure". The paper, on this basis,rather exhaustively investigated the first destabilizing, periodical destabilizing of thestructure and load resulted therefrom onsupports. The paper considers that beforethe collapse of the roof...

By means of both similitude test andnumerical simulation, the papercomprehensively studied the destabilizationof the main roof of the stope mined withtop coal caving in gently inclined extrathick seams. It suggests that the generalstructure of the overlying strata is a "bridg-ing structure". The paper, on this basis,rather exhaustively investigated the first destabilizing, periodical destabilizing of thestructure and load resulted therefrom onsupports. The paper considers that beforethe collapse of the roof strata, at any pointin the strata the horizontal displacement, u,and vertical displacement, v, areexponential functions of the distance fromthe initial point, x: u=a·e~(b·x) and v=c·e~(dx) The subsidence for mining with topcoal caving is much larger than that forslice mining. The deformation in roof stra-ta may be divided into three zones: zone 1,the original zone, over 100 m ahead of theface with little deformation, may be con-sidered as non-deformed zone; zone 2, thecompressive zone, up to 10 m ahead of theface, where the vertical deformation islarger than the horizontal; and zone 3, thetensile zone, from face to caving line, wherefissures well developed with remarkablevertical and horizontal displacements.When the top coal and roof strata de-formed and subsided in advance, the frontabutment point of the main roof rockbeam breaks in the coal wall. The structuremay be "rare bridging", as the main rooffractures and destabilizes. Thedestabilization of "bridged structure" haslittle influence on the stope. Theoretical analysis indicates that thefirst breaking and destabilizing space of themain roof rock beam increases with theback up of the top coal and immediateroof. After the breaking of the rock beam,its front half part is liable to turn into bal-ance, but the rare half destabilizes andforms a "rare bridging structure". The firstweighting space, L, is not equal to thespan, Lo, of the first breaking anddestabilization, but L=Lo-l. The structureof main roof after the first destabilizing isan invert cantilever and becomes a "frontbridging structure" following the periodicaldestabilization. The procedure of bridgingand the characteristics determines that theweighting intensity at the face mined withtop coal caving in gently inclined seam isrelatively low and the load exerting onsupports is light.

本文以缓斜特厚煤层为研究对象,用相似模拟实验和数值模拟两种方法对放顶煤采场老顶运动失稳做了综合研究,首次提出了放顶煤采场上覆岩层的大结构形式为“搭桥结构”,并对该结构的初次失稳、周期失稳及由此施加于放煤支架上的载荷进行了较为详细的研究。这对放顶煤开采实践理论研究具有一定的指导意义。

Based on the field observations, thepaper systematically analysed the dis-placement regularity of coal ribs by both sides of a fully mechanized coal face withtop coal caving in gently inclined extrathick seam and its effective factors. It con-siders that the displacement of the coal ribsby both sides of the face is affected by theprocess of coal extraction, supportsshifting, top coal caving and roofmovement. Along with the advancement offace, the displacement of coal ribs may bedivided into multiple stages....

Based on the field observations, thepaper systematically analysed the dis-placement regularity of coal ribs by both sides of a fully mechanized coal face withtop coal caving in gently inclined extrathick seam and its effective factors. It con-siders that the displacement of the coal ribsby both sides of the face is affected by theprocess of coal extraction, supportsshifting, top coal caving and roofmovement. Along with the advancement offace, the displacement of coal ribs may bedivided into multiple stages. The maximumdisplacement rate of both ribs near the topcoal caving line is up to 12-20mm/d,while the average in the gob is10-14mm/d. As for the horizontal dis-placement rate of the top coal along thedip, there is a dividing line at 4m on theuphill side of the lower gateway. In front offace the horizontal displacement rate of topcoal is higher by the gateway side than bythe face side, while behind the face line, it ishigher by the gob side than by the rib side.The displacement by the uphill side is larg-er than that by the downhill side. Along thedip, the caving angle of the top coal byboth uphill and downhill sides arerespectively 66°and 64°. They are sosmall that it is unfavorable to top coal cav-ing. When a roadway should be driven inthe previous gob, it should be done till thesurrounding rocks stopped moving and thestress distribution in it had been steady,and the roadway should be located in thestress relieved zone.

本文以现场实测为基础,系统分析了缓斜特厚煤层放顶煤综采工作面两侧煤体的位移活动规律及其影响因素,其结论对于在缓斜特厚煤层放顶煤综采工作面实行沿空掘巷的无煤柱开采、减少煤炭损失、提高采区回采率等方面具有重大的指导作用。

The completed mechanics system of coal floor and roof has been presented with experiment of three-dimensional simulation in which mining simulation is new and original,The caving characteristics and parameter of overburden around hydraulic jet coal mining face is obtianed which are obviously different from that of other mining method in the same condition. Roof shapes in first and periodic caving are individually triangle and parailelogram plate structure. There is a certain angle between caving line and...

The completed mechanics system of coal floor and roof has been presented with experiment of three-dimensional simulation in which mining simulation is new and original,The caving characteristics and parameter of overburden around hydraulic jet coal mining face is obtianed which are obviously different from that of other mining method in the same condition. Roof shapes in first and periodic caving are individually triangle and parailelogram plate structure. There is a certain angle between caving line and coal seam strike.

通过三维相似模拟试验研究了底板-煤-顶板组成的力学条件,得出的结论是水采采场上覆岩层的垮落特征及参数与同类条件下的旱采有着显著区别,顶板初次垮落及周期垮落的形状分别为三角形板结构和平行四边形板结构;垮落线与煤层走向是一定角度。

 
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