崩落区回填的生产实践

本文就丰山铜矿无底柱分段崩落法及覆盖层的形成过程进行了介绍，分析了在丰山特定条件下利用露天剥离废石回填崩落区的原因和效果，对回填厚度及其对崩落范围，巷道稳定性影响进行了探讨。     

提高小折射资料解释效率的几种方法

折射法在石油地震勘探中常用于低降速层厚度、速度的测定。常用的厚度计算方法较繁琐，易出错。这里介绍几种用折射法快速求取地层厚度的方法。方法介绍为了下面叙述方便，这里先给出临界距离法（Xc法）和截距时间法（To法）的厚度公式（1）临界距离法（2）截距时间法f述公式中：i为临界角；sini；。一见／V。；sini。。一V。／V。；…。手工来取低降速层厚度的快速方法这里介绍两种求取低降速层厚度方法——T近似法和图表法。T。近似法几近似法的数学式推导为令X。一t。；V；，当v。远大于风时，可以认为图l给出了几近似法的图解，图2…     

Effect of Thickness on the Structure and Tribological Properties of MoSx Coating

MoSx coatings were prepared by bipolar-pulse DC unbalanced magnetron-sputtering system with the variation of coating thickness at different Ar pressures.The composition and surface morphology were determined by using energy dispersive X-ray and scanning electron microscopy;the structural characterization was analyzed by X-ray diffraction.The friction and wear properties were investigated by fretting tests in air with less than 10% and 50% relative humidity.At 0.40 Pa pressure,(002) basal plane orientation was formed throughout the coatings.At 0.88 Pa and 1.60 Pa pressures,(002) basal plane orientation was only noticed in the first stage of coating growth(around 0.20 μm in thickness), and then edge orientations with their basal planes perpendicular to the surface would be evolved in the coatings.Humidity has a minor influence on the coatings that have(002) basal plane orientation,whereas the tribological properties of MoSx coatings with edge orientations are greatly affected by humidity.The mechanisms of coating growth and friction and wear processes are discussed.     

软岩复合顶板突出煤层巷道耦合支护技术研究与应用

阐述了焦作矿区软岩复合顶板突出煤层巷道围岩变形特征及二次耦合支护原理。并介绍了古汉山矿工程实践经验。     

腾龙X71 不一样的“厚”道

或许对追求时尚外观的用户来说，腾龙X7135mm的厚度和以灰色为主的色调实在是难以接受，毕竟12英寸宽屏笔记本电脑往往意味着轻薄和时尚。不过，恰恰是因为超出同类产品的厚度，使得X71具备充足的空间来内置COMBO光驱，而且不用为了考虑散热和功率因素而采用其它轻薄机型常用的，性能较弱的超低电压版Pentium M处理器。