顶板

词组短语

crown plate · crown sheet · lifting plate · roof plate · top tray · apical plate · backing deal

与顶板相关的网络例句 [注：此内容来源于网络，仅供参考]

The wall rocks destroy and deformation of compound roof roadway mainly refers to the roof falling caused by the weak bedding plane of the compound roof.

复合顶板回采巷道的围岩变形破坏，主要是复合顶板的层理弱面引起的顶板冒落。

Aiming at bottom roof caving and support impact problems induced with abrupt large scale caving upper roof in face 21303 of Daliuta mine, this paper put forward the motion parameter at roof caving and calculation formula of roof shear breaking force with the help of theorem of momentum, theorem of moment of momentum and D' Alembert principle. Roof caving process was simulated by Ansys Ls-DYNA program, and maxim impact force was got. The theoretical research outcomes in the paper were applied in face 21303 of Daliuta mine, and were accordant with actual observing status of roof caving process.

针对神东煤炭公司大柳塔煤矿活井21303综采工作面，上层采空区顶板突然大规模垮落对下层顶板及支架的突然冲击问题，文章采用动量定理、动量矩定理、达朗伯原理推出了顶板垮落瞬间的运动量及顶板切顶垮落所需要的剪力值计算公式，用ANSYS LS-DYNA程序对顶板垮落过程进行了数值计算，得到了最大冲击力，在大柳塔煤矿活井21303综采工作面对顶板垮落特征进行了实际观测和理论成果验证。

The trial results show that with the disposal of induced caving roof by presplitting blasting and induced caving roof blasting, about 17.8 m in thickness of rock cushion is successfully formed in the inferior abandoned stope, which can bring down the harm of dashing blast of an explosion caused by roof collapse; apparent run-through flaws arise between presplitting blasting holes, and controllable caving is formed in the roof, abrupt collapse of large area roof is prevented, the productional safe surroundings of underground mining is improved; eventually, the resources' reclamation rate is improved from about 70% to 84.6%, and the dilution rate is abated from 25%40% to below 15%, so efficiently withdrawing is actualized.

试验结果表明：采用预裂爆破与诱导崩顶爆破的方法，通过对顶板的诱导崩落处理，成功地在下方采空区形成了厚度为17.8 m左右的岩石缓冲垫层，有效地降低顶板冒落带来的冲击气浪危害；在预裂孔间产生明显的贯通裂隙，从而在顶板上形成诱导可控崩落，防止顶板大面积的突然垮落，改善地下开采安全生产环境；最终资源的回收率由70%左右提高到84.6%，贫化率由25%~40%降低到15%以下，实现了资源的高效回收。

Made a systematic analysis to the simulation results and educe these conclusions: The reinforcement action of pre-tensioned bolts supporting joints rock mass mainly externalizes in creasing the interlayer-pressure and roadway roof pressure.

预应力锚杆对层状顶板的加固机理是增加层间正压力，从而降低节理面之间的滑动位移，控制顶板离层量，降低巷道位移。预应力锚杆支护，是提高煤巷节理顶板稳定性的有效方法。

With the increasing of the bedrock thickness, pressurized pace was increased gradually, the roof caving and surface subsidence were gentled step by step. When the thickness of roof bedrock was larger than 60m, the bench subsidence was not occurred, and the value of surface subsidence was also small. The mining technology was proper and highly active, and the support programme was feasible. The roof was controlled effectively by the support system, and achieved safety mining.

随着基岩厚度的增加，顶板来压步距逐步增加，顶板垮落与地表下沉越来越缓和，基岩厚度大于60m时，顶板来压不再出现台阶下沉，地面下沉量较小；针对不同厚度基岩提出的采煤方法合理，高效，支护方案可行，能够有效控制顶板，实现安全生产。

A systematic study is made on the underground continuous mining of No.3 thick and low grade orebody of a nonferrous metal mine by a simulation test with similar material and by FLAC-3D method,including the study on the natural roof caving,the time-sequence system of artificially induced roof caving and the roof stress cha...

利用相似材料模拟试验和FLAC-3D研究方法，对某有色金属矿山厚大、低品位的3#矿体的地下连续开采进行了系统研究，包括矿体顶板自然崩落性、顶板人工诱导崩落时序系统以及开采过程中顶板应力变化规律的研究。

Composition: The roof chain conveyer take the standard roof chain as a loading end, by the motor speed reducer is the power drive, moves in the special-purpose guide rail, is different according to the technical process, the roof chain divides into the curve and the straight line.

组成：顶板链输送机以标准顶板链为承载面，由马达减速机为动力传动，运行在专用导轨中，根据工艺流程不同，顶板链分为转弯及直线型。

It is important to reduce the span of the hard roof to avoid its impact load on supports. However, at longwall top coal caving face, the periodical weight of roof is a main factor that crushes the top coal, which is beneficial to the top coal recovery. How to use the roof pressure safely is of crucial importance in top coal caving. Based on field monitoring, theoretical analysis of strata movement, the numerical model of compound structure of hard roof stepped cantilever and the top coal cantilever beam is built, and the parameters of the model are also determined. The elasto-plastic finite element method is used to analyze the effect of hard coal fracture under the abutment pressure of hard roof, and the cracking coefficient is defined according to the stress state of the element.

通过对岩层移动的现场观测，建立了&两硬&条件综放采场台阶悬臂—悬臂梁组合的煤岩组合结构力学模型，并以此煤岩结构为基础，建立&两硬&条件综放采场顶煤压裂的有限元数值模型，分析了坚硬顶板不同来压步距对坚硬顶煤的压裂效应，并确定了合理的支架阻力，从而对坚硬顶板进行有效的控制，消除坚硬项板对采场的冲击隐患，同时保证采场矿压对坚硬顶煤的有效压裂，达到提高顶煤回收率之目的，由此形成了坚硬顶煤、坚硬顶板条件下综放采场围岩控制的基本理论和方法。

Simulating model test is firstly carried to manifest there must have certain structure in roof strata about roof research. Secondly, discretion formula of roof destruction is obtained by simplifying roof strata to elastic thin board.

对顶板的研究中，首先运用相似模拟实验直观表明开采过程中顶板岩层中存在一定的结构体；其次将分段开采后顶板岩层简化为四边固支的弹性薄板，得出了顶板破断的判别式。

And it is concluded that the No.4-2coal seam is a mid-reserve and low-permeable seam, with surrounding rocks having low enclosed system and high permeability. And the coal seam's gas content is low, while its quantity in the roof-sandstone which is the main source of coalface's gas emission is high . The quantitative index used to analyze gas content and gas emission amount are pointed out systematically. And gray association analysis method is adopted to search the main factors affecting coal-bed content and gas emission amount.

系统提出了分析影响煤层瓦斯含量与采面瓦斯涌出量大小的量化因素指标，并将灰色关联分析原理引入煤层瓦斯含量与瓦斯涌出量主控因素的研究中，筛选出了煤层顶板含油指数，顶板砂泥岩比、4-2号煤层顶板以上煤系厚度3个因素指标为影响4-2号煤层瓦斯含量的主控地质因素；煤层埋藏深度，煤层瓦斯含量，煤层顶板含油气砂岩厚度，煤层顶板含油强度及工作面回采进度5个因素为影响综采面瓦斯涌出量的主控因素。

与顶板相关的网络解释 [注：此内容来源于网络，仅供参考]

abacus：顶板

碗状圆垫板(ECHINUS) 在多立克或托斯卡柱式(ORDER)中,柱身(SHAFT)顶部和柱顶板(ABACUS)之间的坐垫状部分(图159、162). 万神殿/纪念堂(PANTHEN) 供奉众神的神庙(图238、239),或一民族伟人之陵墓或纪念堂(图795).

Roof panel - complete - Integral roof rack fitted, Compound and polish：整个车顶板(装有整体式车顶行李架)上抛光剂和抛光

"Roof panel - complete - Integral roof... | "Roof panel - complete - Integral roof rack fitted, Compound and polish","整个车顶板(装有整体式车顶行李架)上抛光剂和抛光" | "Roof panel - complete - Integral...

Roof panel - complete, Local respray：整个车顶板局部重新喷漆

"Roof panel - complete, Local compound and polish","整个车顶板局部... | "Roof panel - complete, Local respray","整个车顶板局部重新喷漆" | "Roof panel - complete, Flat compound and polish","整个车顶板平整...

Roof panel - complete, Local respray：整个车顶板局部重新喷涂

"Roof Panel - Complete - Local Compound And Polish","整个车顶板局部上抛... | "Roof Panel - Complete - Local Respray","整个车顶板局部重新喷涂" | "Roof Panel - Complete - Flat And Repaint","整个车顶板平整...

tank top plate：重底顶板;柜舱顶板

舱柜试压;船模试验 tank test | 重底顶板;柜舱顶板 tank top plate | 柜型稳定器 tank type stabilizer

tank top plate：二重底顶板,柜舱顶板

艉凸部下方,船底后端 tuck | 二重底顶板,柜舱顶板 tank top plate | 蒸汽加热器,蒸汽暖炉 steam heater

crown plate：燃烧室顶板

燃烧室Combustion chamber | 燃烧室顶板Crown plate | 顶板支梁Girder

crown sheet：内火箱顶板

外火箱顶板 roof sheet | 内火箱顶板 crown sheet | 后板 back sheet

semicircular crown sheet：半圆形火箱顶板

半圆形顶板semicircle top sheet | 半圆形火箱顶板semicircular crown sheet | 半自动焊semi-automatic welding

lifting plate：顶板

顶板 ejection plate | 顶板 lifting plate | 顶板 top board