采空区

Aiming at paste backfilling of underground Open-stope,this paper put up systematic and deep research to theory and technology.

本文针对地下采空区膏体充填理论与技术进行了系统、深入的研究，主要内容和结论如下：(1)从膏体料浆的重量浓度、屈服应力、流变曲线、可泵性等多方面揭示了膏体的特性。

It shows that the particle vibration velocity is related to the maximum single sound charge,distance from the blasting point uo the measured point,types of explosive and blocking condition.While transforming opencast mining into underground mining,if a goave is filled up with gangues,the surface rock mass of slope ca...

在露天转地下开采时，如果对采空区充填废石，不仅可以使边坡表面岩体处于有利的三向受力状态，回填废石体还起到了爆破减震作用，同时还有明显的高频滤波作用，有利于保持地下巷道的稳定性。

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。

Based on the current condition of Henan aluminum soil recultivation, we located an empty and waste area after exploited at Xiaoguan Mine of Changcheng Aluminum Industrial Company and carried out a series of experiment and research on soil recultivation there in terms of engineering recultivation, biological recultivation and soil ripeness.

依据河南省铝土矿土地复垦的现状，选取长城铝业公司小关铝土矿开采后的采空区、废石场进行土地复垦的试验和研究。主要进行了工程性复垦试验、生物性复垦试验、土壤熟化试验研究。

The transient electromagnetic installation conmmonly sued in detection of water-accumulating gob in coal mines is configuration of central loop—fixed loop sources,systematic theoric analysis and numerical modeling were made in the paper in term of rim effect.

瞬变电磁法探测煤矿积水采空区常用的装置为大定源-中心回线组合方式，由此产生的边框效应问题本文进行了系统的理论分析和数值模拟。

Through research of this paPef, mechanisms and theories and teclmiques ofprevention and cure of shallow roof disaster and goaf nature fire disaster under thickwind sands are primarily established.

通过本论文的研究工作，初步建立起厚风积砂下浅埋工作面顶板灾害和采空区自然发火灾害发生的机理及防治理论与技术。

Hazard potential evaluation of regions underlain mined caverns is one of difficult technical problems in highway engineering.

采空区的危害性评价是矿区高速公路建设技术难题之一。

The distribution of gas,oxygen and temperature in the goaf under conditions where oxygen is consumed and gas is effusing were obtained by numerical simulation methods.

通过现场实测获得基础数据，用G3程序求解了在煤耗氧和瓦斯涌出共同环境下采空区瓦斯-氧浓度及温度的分布。

By FLUENT hydro-simulation soft, the wind flowing in the gob area is simulated and further analysis and validation is made about the mechanism of gas effusing and its prevention by air screen .

并通过FLUENT流体模拟软件，对采空区风流流动进行模拟，进一步对上隅角瓦斯涌出和空气幕防治上隅角瓦斯涌出的机理进行分析和验证。

According to the actual parameters of coal mining face, the models of jet blower and air compressor are made out. Then locate the jet blower on mining face and air screen is produced by the jet blower to prevent the gob areas gas effusing to the top even angle.

然后在工作面具体安放射流风机，通过射流风机产生空气幕进行均压、阻断采空区瓦斯向上隅角涌出。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。