弱透气性厚煤层,thick coal seam with low permeability
1)thick coal seam with low permeability弱透气性厚煤层
2)Weak and well ventilated sex coal seam弱透气性煤层
3)Seam permeability煤层透气性
1.Theoretical study to improve seam permeability;提高煤层透气性的理论研究
英文短句/例句
1.Factors affected coal seam permeability change and its law is analyzed.分析了煤层透气性变化的影响因素及变化规律。
2.The new measuring method for distance of the gas drainage hole and seam permeability瓦斯抽采孔孔距及煤层透气性的测定方法
3.Practice on Relieving Shot Controlled by Borehole and Increasing Air Permeability Coefficient of Seam钻孔控制卸压爆破增加煤层透气性系数的实践
4.The Research on Calculating the Permeability of Coal Seams Combining the Curve of Rising Gas Pressure in the Boreholes结合钻孔瓦斯压力恢复曲线计算煤层透气性系数的方法研究
5.Theory and practice of integrated pillarless coal production and methane extraction in multiseams of low permeability低透气性煤层群无煤柱煤气共采理论与实践
6.Test on Pressure Released Blasting Applied to Seam Opening of Cross-Cut in High Gassy and Low Permeability Seam高瓦斯低透气性煤层石门揭煤卸压爆破试验
7.Study on Uncovering Low Permeable Coal Seam Through Cross Cut by Deep-hole Blasting Technology to Increase Permeability of Coal Seam;石门揭穿低透气性煤层深孔爆破增透技术研究
8.The Theory and Technology Study on Pressure Relief and Permeability Enhancements of the Coal Seam with High Concentration of Gas and Low Permeability高瓦斯低透气性煤层卸压增透理论与技术研究
9.Study of Gas Exhausting and Mining Techniques on Outburst Coal Seam with Low Permeability for Strengthening Antireflection低透气性突出煤层强化增透瓦斯抽采技术研究
10.RESEARCH ON CBM DEVELOPMENT OPTIONS FROM LOW PERMEABILITY COAL SEAMS低渗透性储层煤层气地面开发方案的探讨
11.It is significant to prediction of coalbed permeability and resource evaluation of coalbed methane.其结果对煤层气资源评价和煤层渗透性预测具有重要的指导意义。
12.Research on Directional Drilling Technique of Gas Drainage in Low Gas Permeability Coal Seam;低透气性煤层瓦斯抽放定向钻进技术研究
13.Application of Gas Tail Gateway to Top Coal Caving Mining in Low Permeability Thick Seam瓦斯尾巷在低透气性厚煤层放顶煤开采中的应用
14.Study on the Technology of Increasing Drainage in High Gas and Low Air Permeability Coal Seam;高瓦斯低透气性煤层强化增透抽放瓦斯技术研究
15.Study on Effect of Intensified Increasing Permeability by Deep-hole Presplitting Blasting in High Gas and Low Permeability Coal Seam高瓦斯低透气性煤层深孔预裂爆破强化增透效应研究
16.The Research on Geology Process Simulation of Permeability Evolution in the Coal Reservoirs;煤层气储层渗透率演化过程模拟研究
17.Study on Mechanism of Injection Heat Increasing Production in Coal-bed Gas of Low Permeability Coal Seam低渗透煤层煤层气注热增产机理的研究
18.The relationship between the permeability of coal bed and production curve about coal-bed methane vertical wells煤储层渗透率与煤层气垂直井排采曲线关系
相关短句/例句
Weak and well ventilated sex coal seam弱透气性煤层
3)Seam permeability煤层透气性
1.Theoretical study to improve seam permeability;提高煤层透气性的理论研究
4)the low gas permeability coal seam低透气性煤层
1.This paper based onthe low gas permeability coal seam 416 stope working face of Tongchuan mineral bureau,we analyzed the mechanism of the hydraulic cutting seam to improve the gas permeability coal seam,by this study,it shows the hydraulic cutting seam technology is effectual measure and it is provided with nicer practically and capacious foreground.文章以铜川矿务局陈家山煤矿低透气性416综放工作面为研究背景,深入研究了水力割缝增强煤层透气性的作用机理,试验表明了水力割缝的确是一种提高低透气性煤层瓦斯抽放的有效措施,并具有良好的实用性和广阔的推广前景。
5)low air permeability coal seam低透气性煤层
1.Using RFPA2D-Flow stereo-gasses coupled system to simulate the process of gas draiange in lower air permeability coal seam by loose blasting,it interprets that loose blasting is a effective ways to increase air permeability inlow air permeability coal seam.运用RFPA2D-Flow固气耦合系统模拟了松动爆破抽放低透气性煤层内瓦斯的过程,解释了爆破松动是增加低透气性煤层透气性的有效途径,本文对松动爆破前后抽放过程中煤层内瓦斯压力和瓦斯渗流场的变化规律进行了数值模拟对比,为进一步理解瓦斯抽放、松动爆破增透机理等提供理论基础和科学依据。
6)low permeable coal seams低透气煤层
延伸阅读
高分子材料透气性高分子材料透气性gas permeation property of polymer materials高分子材料透气性gas permeation property ofpolymer materials高分子链段因微布朗运动产生局部密度涨落或直径小于10人的微隙，使气体分子在逸度差的驱动下透过材料的性质。气体透过机理橡胶态高分子对于非凝聚态气体的透过可由溶解一扩散模型描述。气体与高分子膜接触，在逸度差的驱动下吸附溶解在膜表面(溶解过程)，再在膜内形成浓度梯度，扩散到膜的另一面脱出(扩散过程)，处于非稳态。当膜中气体浓度梯度沿厚度方向呈线性分布时达到稳态，气体以恒速透过。玻璃态高分子因内部存在微隙，气体被吸附在微隙内。吸附平衡同时服从气体溶解的亨利定律和气体吸附的兰格缪尔定律。这类高分子对于非凝聚态气体的透过宜用双重吸附扩散模型描述。因高分子与凝聚态气体之间的亲和性较大，使得高分子—凝聚态气体体系的溶解扩散过程复杂化，不再遵从上述透过规律。高分子对于混合气体的透过，随高分子与气体之间的亲和性大小而变。当亲和性小时，以上透过规律不变;否则需作修正。参数及其测定表征透气性的主要参数有透过系数P、扩散系数D和溶解度系数S。测定尸的方法有异压法和等压法。异压法包括压力法(高真空法、高压法、低真空法、质量分析法)和体积法;等压法包括电极法和热敏电阻法。其中以高真空法最精确，低真空法较普及。测得现有高分子材料的尸值为10一4一104bar。常以高真空法和质量分析法测定D;S可由质量分析法直接测定或由尸=D·S求出。高分子对不同气体具有不同透气速率的性质称为选择透过性。它在实用上具有重要意义。由分离系数a表示外式中ya、夕b分别为透过侧a、别为供给侧a、b的分压。时，aalb竺Pa/Pti，式中Pa、系数。 ’Wb .Wab气体的分压，wa、桃分当混合气体间的作用微弱几分别为a、b气体的透过影响因素透气性受以下3个因素的影响。①高分子化学结构和形态结构:由带极性基团链节构成的高分子，因链间的偶极作用或形成氢键阻碍了气体透过，尸只有1让4一10一‘bar。链节含双键有利于链旋转和气体溶解，尸较高。天然橡胶、顺丁橡胶等的P为10一102bar。硅橡胶因链节CH3(一51一O一)CH3易自由旋转，链段极柔软，白由体积率高，尸>5只1于bar。链节上带一51(CH3)3、一C(CH3)3或一CH3，能提高白由体积率而使尸增大。
