查询词典 soft coal

Study on characteristics of mining deformation and mechanism for the "Three-soft" thick coal seam floor－example of Zhengzhou minging area.

朱术云。&三软&厚煤层底板采动变形特征及其机理研究－以郑州矿区为例。

The factory has accumulated nearly 20 years of production experience, advanced equipment, good human resources, scientific management, best-selling products all over the country, in the geological survey, water conservancy, metallurgy, coal fields, such as drilling industry survey for the single-core structure, multi - Unit soft wire cutter made of rehabilitation.

本厂积累近二十年的生产经验，拥有先进的设备，优秀的人才、科学的管理，产品畅销全国各地，在地勘、水利、冶金、煤田等钻探勘测行业结构为单线芯，采用多股软导线复绞制成。

As the field work in Xi Shanping Tunnel showing, constructing tunnel in flat dip coal-bearing strata, if there is thick-bedded hard rock nearby, the stability of the wall rock is ensured by the control in soft rock supporting reinforce.

本文对近水平煤系地层中修筑隧道的围岩稳定性进行了深入分析，在含煤岩的围岩变形及应力重分布规律的研究上有所创新，为近水平围岩的支护设计优化提供了可靠依据。

Meters liquid presses drill machine is mainly used to drill to explore various depth as 200 meters any kind of angle of bore . It can drill a hole in the rock of different degrees of hardness. Drilling a hole in the coal seam, soft rock and in the farmland beat the well time and limited efficacy rate .

200米液压钻机主要用于钻探各种深度为200米左右的各种角度的各类用途的孔，可在不同硬度的岩石中钻孔，而在煤层、软岩石中钻孔以及在农田打井时效率最高。

Directing to the special geology conditions of 8415 face cut hole in Zhuxianzhuang Coal Mine,the experiences of bolting support with wire mesh in the much thicker soft seam are introduced,and the cost of roadway support is also analyzed.

针对朱仙庄矿 84 15工作面切眼特殊的地质条件，介绍了高强锚杆支护技术成功应用于特厚极软煤层的经验，并对巷道支护成本进行了分

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。