1) descending slicing
下行分层
1.
A new type of advancement by full section descending slicing of doorhead is introduced.
在竖井掘进的同时,下行分层全断面掘进马头门,以桐坑三期副井为实例。
2) under the good lamination job practice
下行分层法
3) descending chromatography
下行色层分离法
4) down stop
下行停层
5) middle pilot tunnel descend storied lamination
中央导硐下行分层
1.
Nine division belt machine adopt middle pilot tunnel descend storied lamination construct method,transect construction ensure security.
九采区胶带输送机皮带机头硐室刷扩,采用中央导硐下行分层的施工方法,大断面施工保证了安全。
6) lower slice
下分层
1.
Based on real conditions of lower slice top caving seam behavior, a conclusion of Strata pressure behavior is drawn, including work resistance and setting load of supports and distance of press.
针对“两硬”条件,下分层放顶煤开采的实际,系统总结了下分层放顶煤开采矿压显现规律,包括支架工作阻力、初撑力、来压步距,为放顶煤开采提供理论依据。
2.
This paper puts forward two supporting schemes for he buttock of the comprehensive mechanized coal mining face on the lower slice, and through the field practice, sums up and compares their respective merits and demerits, and determines a buttock supporting scheme that is suitable to the comprehensive mechanized coal mining face on the lower slice.
对下分层综采工作面端头支护提出两种方案,经过现场实践,总结出了各自的优缺点,并进行了比较,最后确定了适合下分层综采工作面的端头支护方案。
补充资料:垂向分层理论
垂向分层理论
stratification theory of grains in vertical direction
ehuix旧ng feneeng Iilun垂向分层理论(stratifieation theory of grainsin vertieal direetion)对重选过程中矿粒群在介质中作垂向分层运动机理的阐释。在重选设备内堆置或铺置的动态矿粒群称作床层。借助介质的垂直流动、沿斜面流动或作回转运动使床层松散,是粒群发生分层转移的先决条件。分层是指矿物粒群按密度差形成不同的矿物层;颗粒的粒度以及形状对分层也有重要影响。对于分层的发生机理,曾经有过多种见解,但归纳起来不外两类观点。一类是动力学分层学说,认为分层是按个别颗粒在介质中的运动差异发生的(见自由沉降速度差分层学说、干涉沉降速度差分层学说);另一类是静力学分层学说,认为分层是粒群整体的内在不平衡因素引发的(见悬浮体密度差分层学说、位能分层学说和重介质分层学说)。前一类学说强调了流体动力对颗粒运动的影响,而忽略了颗粒间的静力作用;后一类学说的立论观点则忽视了流体动力对分层的影响,而将床层内颗粒或颗粒群间的静力差异视为分层的决定性因素。 (孙玉波)
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条