π放工作面,caving coal face withπtype beam
1)caving coal face withπtype beamπ放工作面
1.Aimed at the characteristics of gas gush atcaving coal face withπtype beam,on the basis of anayl- izing the consitution of gas gush source,the comprehensive management measures with reasonable wind distri- bution,gas drainage of roof strike drilling holes are carried out.富力煤矿针对π放工作面瓦斯涌出特点,在分析瓦斯涌出的来源和构成基础上,对π放工作面实施合理配风、顶板走向钻孔抽放瓦斯的综合治理措施,确保了工作面高产高效。
2)π type caving faceπ放面
3)blasting caving face炮放工作面
1.28041blasting caving face,three kinds of crossing the fault projects are established.针对28041炮放工作面的断层情况,研究、制定了三种过断层方案,分别论述了其优缺点。
4)fully mechanized caving face轻放工作面
1.The mining offully mechanized caving face in the large-angle construction is realized.在大角度俯采条件下,以23123轻放工作面为例,对回采过程中存在的问题进行分析,并提出解决办法,成功实现了轻放工作面的大角度俯采,并为类似地质条件的煤层开采提供了借鉴经验。
英文短句/例句
1.Design for drawing out gas with high position boring at coal face轻放工作面抽放瓦斯高位钻孔的设计
2.Technology of Light-support Caving Mining with Large Angle轻放工作面大倾角仰斜开采工艺技术
3.Continuous recovery technology for large downhill of light caving face in island seam孤岛轻放工作面过下山连续开采技术
4.Analysis on the roof fall before frame in light caving face轻放工作面架前冒落原因分析及预防
5.Strata Behavior of Fully Mechanized Coal Face with Sublevel Caving by Light Supports in Faults Pillar;断层孤岛煤柱轻放工作面矿压显现规律研究
6.Application of the light-caving technology in the large dip argle depression mining work face轻放工艺在大倾角俯采工作面的应用
7.Application of the Light Breaking Props on the Comprehensive Mechanized Mining Faces in Malan Coalmine轻型放顶煤支架在马兰矿综采工作面的应用
8.a knife blade grazing the countertop;轻轻擦着厨房里工作台面的刀刃；
9.Increasing Rate of Coal Mining with Improving Coal Caving Technology at Fully Mechanized Face改进综放工作面放煤工艺提高回采率
10.Research on the Method of Draining the Gas on Roof Gallery of Full-Mechanized Caving Mining Face综放工作面尾巷排放瓦斯方式的探讨
11.The Great Inclination Angle Synthesis Puts the Working Surface Core Technique of Production Exploration大倾角综放工作面核心生产工艺探索
12.Practice of "Two Wining and One Caving" Technique on Blasting and Top-coal Caving Working Face“两采一放”工艺在炮采放顶煤工作面的实践
13.Charley threw up his job to take up more respectable, more sensible employment查利放弃他的工作,去从事更体面、更实惠的工作。
14.Let the package down gently. Glass ware inside.轻轻把包放下，里面是玻璃制品。
15.Characteristics of Gas Emission and Distribution of Fully Mechanized Top-Coal Caving Face Under Gas Drainage Conditions综放工作面抽放条件下瓦斯涌出及分布特征
16.Evaluation of Top Coal Caving Characteristics for 1604 Fully Mechanized Caving Face of Lutian Coal Mine路天煤矿1604综放工作面顶煤冒放性评价
17.Top Coal Crushing Mechanism and Determination of Roof Caving Height in Roof Caving Workface放顶煤工作面顶煤破碎机理及放煤高度的确定
18.He has got a plum after the interview.面试后，他获得了一份待遇高的轻松工作。
相关短句/例句
π type caving faceπ放面
3)blasting caving face炮放工作面
1.28041blasting caving face,three kinds of crossing the fault projects are established.针对28041炮放工作面的断层情况,研究、制定了三种过断层方案,分别论述了其优缺点。
4)fully mechanized caving face轻放工作面
1.The mining offully mechanized caving face in the large-angle construction is realized.在大角度俯采条件下,以23123轻放工作面为例,对回采过程中存在的问题进行分析,并提出解决办法,成功实现了轻放工作面的大角度俯采,并为类似地质条件的煤层开采提供了借鉴经验。
5)fully mechanized caving face综放工作面
1.Analysis on the reliability of mining system offully mechanized caving face in complex geological conditions;复杂条件综放工作面生产系统可靠性分析
prehensive gas control in high production and high efficientfully mechanized caving face of Tangshan mine;唐山矿高产高效综放工作面瓦斯的综合治理
3.Dynamic numeric simulation of coal self-ignite in goaf infully mechanized caving face;综放工作面采空区煤自燃过程的动态数值模拟
6)fully mechanized top-coal caving face综放工作面
1.Mechanical characteristics offully mechanized top-coal caving face and surrounding rock stress shell;综放工作面及其围岩宏观应力壳力学特征
2.The reliability analysis of the velocity ratio of coal cutting to support moving infully mechanized top-coal caving face;综放工作面采支速度比的可靠性分析
3.Numerical simulation of distribution regularities of dust concentration infully mechanized top-coal caving face;综放工作面粉尘浓度分布规律的数值模拟
延伸阅读
π, π-conjugation分子式：CAS号：性质：单键和双键相互交替排列的共轭体系。最简单的为1,3-丁二烯，而苯分子则是一个具有高度对称结构的闭合共轭体系。除碳碳双键外，碳碳叁键、碳氧双键等，都可组成π,π-共轭。例如：CH2＝CH—C≡CH；CH2＝CH—CH＝O。由π,π-共轭引起的使分子内能降低、键长发生平均化等电子效应，称为π,π-共轭效应。
