roof pressure

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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Research on the Change of Roof Pressure in Mining Coal Seam Athwart the Dipping Direction of Structural Plane by Centrifugal Model Test

逆结构面倾向开采顶板压力变化离心试验研究

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The test conditions and main results of wind tunnel test for Terminal 3 at Beijing Capital Airport are introduced. The block shape coefficients for the most unfavorable conditions are given, which clearly show the characteristics of the wind pressure distributions on this long-span roof surface.

介绍了超大跨度屋盖结构&北京首都机场3号航站楼的模型风洞试验概况和主要结果，给出了屋面在最不利工况下的分块体型系数，清楚地显示了屋面的风压分布特征。

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Use the high pressure sprayer , do not spray on electrical equipments. Spray to roof and wall.

喷雾可用高压喷枪,注意喷雾要均匀,房顶和墙壁都要喷到, 不要喷至配电盒等电器设备.

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A rigid framework, as of wooden beams or metal bars, designed to support a structure, such as a roof. Elementary Dissertation of Sustainment Space Between for Preventing from Distortion in Welding Structural Part of Hydraulic Pressure Bracket

桁架用木棒或金属棒做成的坚硬的构架，用于支撑屋顶等结构液压支架结构件焊接防变形支撑形式浅析

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Testing Study on Wind Pressure Behaviors of Shanghai South Railway Station Roof

上海铁路南站屋盖表面风压特性试验研究

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On this basis the cracked position and inclination of the main roof are determined. The Influence of the Fracture of the Main Roof On the Mining Ground Pressure

从中分析和确定了老顶在回采过程中的断裂位置和可能形成的回转角，以及相关的影响因素。老顶断裂前后的矿山压力变化

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With grouting-bolting as the kernel, pre-stressed anchor rope and anchor as the auxiliary structure, the three-bolting combined supporting system combining pressure-relief technology of roof control and laneway floor heave control technology solved the supporting stability problem in deep-seated soft rock roadway.

通过以锚注为核心，预应力锚索和锚杆为辅助支护结构的三锚联合支护技术，结合控顶放压技术和底臌控制技术解决了深部软岩巷道的稳定性控制问题。

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Studies shod that the grey models can simulate or reflect roof pressure parameters changing and its inner rules.

研究表明，灰色模型能很好地模拟或反映顶板压力参数的变化过程与内在规律。

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Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face tap ( ping) drill

综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究

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According to coal wall front force of support and workface support stress movement transformation relations, the main roof cycle pressure can be accurately forecast.

根据工作面煤壁前方支承压力和工作面支架受力之间的运动转化关系，可准确预报工作面老顶的周期来压；

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The pre-tensioned bolts increase the joints pressure which is the mechanics of strengthening the joints roof. Thereby the joints sliding distance, the roof separation value and the roadway displacement is reduced.

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。

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The caving of thick and strong roof stratum, key stratum, causes tremendous rock pressure in mine.

采场上覆岩层中的厚硬岩层, 即厚硬关键层, 其冒落会造成剧烈的矿山压力显现.

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