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- coal surface collapse 地面塌陷
- Surface collapse of coal field is one kind of geological disaster with great hazard, which may result from distortion and breakout of overlying strata that lose their support after underground coal beds are excavated in a large area. 摘要采煤区地面塌陷是由于地下煤层大面积采空引起上覆岩层失去支撑而变形崩落最后导致地面沉降一种危害很大的地质灾害。
- Exploitation of groundwater was overloaded seriously, and caused earth surface collapse, cone of depression, and groundwater was seriously polluted. 地下水严重超采,造成多处地表塌陷和降落漏斗,并成为济南市地下水的重污染区。
- An improved mode of coal cutting is recommended aiming at the specifical status of surface collapse of coal field in Yanzhou city, and several control policies on restoration and reclamation of collapsing land are also put forward. 针对兖州矿区的具体塌陷状况提出了改进采煤方式、对塌陷土地进行恢复和复垦等几点防治措施。
- The functional groups related to the coal surface potentials and their changes by H2O2-oxidation were quantitatively characterized using FTIR. 用FTIR定量表征了与煤表面电位有关的官能团以及被H2O2氧化后的变化;
- Molecular design of structure:comparing with other PAMAM dendrimer core, cyclotriphosphazene has more functional groups on its coal surface. 多功能化多层次三聚膦腈核树枝状大分子 的合成、结构与性能研究 摘 要 (1)从分子设计看三聚膦腈核PAMAM树枝状高分子的合成 1.;组成结构的分子设计:三聚膦腈作为树枝状大分子的核心较其他核拥有更高的表面官能团密度。
- The pretreatment of high sulphur coal by electrolysis reduction, can reduce oxygen-containing functional groups on coal surface, and increase the hydrophobicity. 摘要采用电解还原法对高硫煤预处理后,使煤表面的含氧官能团减少,疏水性增强;
- The karst surface collapse in Wuhan happened at the intersection between the NE first terrace binary-structured deposits of Yangtze River and carbonate in the core of E-W syncline. 武汉市岩溶地面塌陷发生在具二元结构的北东向长江一级阶地与近东西向褶皱构造向斜核部碳酸岩盐地层相交的部位。
- The content of ash,the content of soluble mineral matters in CWS,the pore volume and the Zeta-potential properties of coal surface mainly affect the rheological behaviour of CWS. 与煤浆流变性有关的主要煤质因素为煤的灰分质量分数、煤中可溶矿物离子的溶出量、压汞仪所测煤的孔体积以及煤表面的动电位性质;复相关系数为0.;917;
- The landslides of opencast mines, the surrounding rock instability of underground opening and surface collapse are the three main geologic hazardr or geotechnique problems of mines. 露天矿滑坡,地下平巷围岩失稳和地面塌陷是矿山三大主要地质灾害或岩土工程问题。据优势面的分析观点,它们是受优势断裂或优势面控制的。
- On completion of charging, the coal surface is levelled in the oven by inserting a leveller bar through an oven end door and passing it along the coal surface. 加料后,通过一根从高炉底门插入的碾辊,使之沿煤表面移动,把煤扒平。
- Conclusion Combination of external fixation and bone grafting can not only avoid displacement, length shortening and articular surface collapse, but also promote bone healing and reduce complication. 结论有限切开植骨结合外固定器可以防止复位后骨折再移位、短缩及关节面塌陷,促进骨愈合,减少并发症。
- The geologic hazards in Huatong copper mine in Wafangdian, Liaoning Province involve tailing dams, seawater invasion, surface collapse, water bursting from pit, wallrock deformation and roof falling. 摘要华铜矿矿山主要有尾矿坝、海水入侵、地面塌陷、矿井突水、滑坡、围岩大变形冒顶等地质灾害。
- The adsorption energy of H~+ on different coal surface, along with correlated chemical bond length, order, and net charge distribution were obtained by means of ZINDO quantum chemical calculation of model compounds. 通过对模型化合物的ZINDO量子化学理论计算 ;得到了H+ 在煤表面的吸附能、相关化学键的键级、键长和净电荷分布 .
- Using interface stage adsorbing model to establish a mathematic model for equivalent temporation adsorbing on coal surface by flotation collector so as to explore the rule is introduced. 介绍利用界面化而阶段吸附模型,建立了捕收剂在煤表面等温吸附的数学模型,以探索捕收剂在煤表面吸附的普遍规律。
- It is also indicated that the hydrophilic oxygen-bearing groups and mineral matters on coal surface is beneficial to slurry pseudoplastic behavior although they are harmful to coal slurryability. 对浆体流变特性的研究表明,浆体的屈服假塑性与煤表面活性含氧官能团和矿物质的含量有关,煤表面较高的亲水性有利于浆体屈服假塑性的改善,从而使其对浆体性质的影响具有双重性。
- The yield pseudoplasticity of slime was related to the content of oxygen containing functional group and mineral substance on the coal surface.Higher hydrophilicity of coal surface was advan... 料浆的屈服假塑性与煤表面活性含氧官能团和矿物质的含量有关,煤表面较高的亲水性有利于料浆屈服假塑性的改善。
- The rate of anatomical reduction was 90.3% (the distance of articular surface collapsing less than 2?mm). 解剖复位率为90.;3%25(关节面塌陷小于2mm)。
- The adsorption characteristics of 6 CWS dispersants on 14 coals surface were studied. 研究了6种水煤浆分散剂在14种不同变质程度煤上的吸附作用特征。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。