roof rock的例句大全

The rock mass structure can be expressed by rock stratum effect thickness influence coefficient. It is more scientific then using roof rock and sand content in the study of coal seam gas preservation.

研究表明，煤层围岩岩体结构控制了煤层瓦斯的赋存，岩体结构可用岩层效应厚度影响系数来表示，应用这一参数研究煤层瓦斯赋存比用煤层顶板岩性及含砂率更科学。

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The s detecting structure instrument of the roof rock is integrated in the pneumatic bolt drill and data processing is adopted BP algorithm of mature net to identify the structure.

其中，顶板岩层结构探测仪是集成在风动锚杆钻机上，数据处理采用训练成熟的BP算法神经网络进行结构的识别；

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New Technique of Gas Drainage by Long Horizontal Roof Rock Hole

顶板岩层水平长钻孔抽放瓦斯新技术

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One of the crucial elements influencing the rock burst is the structure of roof rock stratum, especially the flinty and thick sandstone roof over the coal seam.

顶板岩层结构，特别是煤层上方坚硬、厚层砂岩顶板是影响冲击矿压发生的主要因素之一。

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The destroy of the roof produced by stress wave of upward hole side blasting is less than that of the level hole blasting. The work of prizing flexible rock decreased by 58. 3%.

上向孔侧向崩矿爆炸应力波对采场项板的破坏比水平落矿爆炸应力波对采场顶板的破坏要小，从而使撬毛工作量减少了58.3%。

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At the extent of 55 °≤δ≤ 70 °, maximum shear stress of closer empty element rock mass is all less than compressive strength of coal bed roof and floor plate mudstone including shale interlayer.

在55°≤δ≤70°范围内，煤层开采临空单元岩体最大剪应力皆小于煤层顶、底板泥岩夹页岩的抗压强度，其屈服接近度也大多小于10。

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The preliminary study to the characteristics of surrounding rock and support design procedures in working faces of strong roof and high ground pressure of deep mines are conducted in this paper using several important methods such as numerical simulation, theory analysis and measuring data analysis from locales.

本文采用数值模拟分析、理论分析和现场实测数据分析等研究方法，对深井高地压坚硬顶板采场围岩特性与支护设计进行了初步的研究。

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Study of Prevention Methods of Rock Burst Disaster Caused by Hard Rock Roof

坚硬顶板型冲击矿压灾害防治研究

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Embedded Development and Realization of a Rock Oil Flat Roof Test-machine

嵌入式测井平台测试仪的研发与实现

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Effect of igneous rock on the roof pressure of mining field

火成岩对采场顶板压力分布的影响

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Safety Mining Feasibility and Coal Face Support Control under Main Roof of Thick Igneous Rock

厚层岩浆岩老顶下安全回采的可行性及支护控制

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Analyses the migration mechanism of overlying formation of fore-and-aft mining, and the stability influence of roof-floor rock, gains the stress distribution of plastically deforming area form the elasto-plastic stability of coal pillar.

分析了采动影响前后巷道上覆岩层运动、掘巷前后巷道顶底板的岩层及煤柱稳定性；由煤柱的弹塑性稳定性分析中，得出煤柱塑性区应力分布；

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The numerical model of roof bolting and rock was based on Hoek Brown's strength criterion.

基于虎克-布朗强度准则给出了岩体及顶板锚固的数值模型.

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The garden application for 4 types of experimental plants in the Genus Sedum had been reasearched, and main application methods were as follows: landscaping of roof and wall, landscaping of highway and slope, landscaping of rock garden and landscaping of flower bed and border.

对试验中四种景天属植物在园林中的应用进行了分析，其主要应用方式有：屋面及墙体绿化、公路及护坡绿化、岩石园绿化、花坛及花境绿化。

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For measuring the rockwool material loss factor, the vibration beam method was measured. And the loss factor-frequency curve of rock wool material is fitted according to the testing results. ( 2) Damping properties of rockwool sandwich roof panel with standing seam system was studied.

采用振动梁法测量了岩棉材料的损耗因子，并根据试验结果拟合得出岩棉材料与频率相关的损耗因子曲线。（2）对直立锁边岩棉夹芯屋面板的阻尼性能进行研究。

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The key block mechanics analysis of roadways' roof unsteadiness in cranny rock-mass and its supporting strength design

裂隙岩体巷道顶板失稳的块体力学分析与支护强度设计

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The roof collapsed in a roar of rock and rubble.

屋顶轰隆一声塌了下来，碎石瓦砾落了一地。

词典精选例句

On the premise of the stability of roof and top coal, the displacement regularity of surrounding rock must be rationally used to determine the reasonable filling pattern and filling strength in order to ensure the filling stability and a good result of retaining roadway.

当采用综放沿空留巷时，在保证顶煤及顶板稳定前提下，合理利用围岩移动规律，确定合理充填方式和充填体强度，就能保证充填体稳定，达到很好的留巷效果。

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roof stress-distribution and surface subsidence rock movement are studied respectively by 3d fem code ansys before and after ore pillar dilapidation and roof cutting.

应用三维ANSYS有限元程序研究了切顶与矿柱崩落前后顶板的应力分布状态和岩体移动情况。

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the movement of site cover rock and the change of abutment pressure round the site are the main reasons that lead to roof accidents.

采场覆岩的运动及采场周围支承压力分布的变化是导致采场顶板事故的最主要原因。

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