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- Transforming Mine Gas Drainage System and Raising Gas Drainage Rate? 粉尘作业人员的饮食要注意什么?
- One of the major problems is that the designed gas drainage schemes have no scientific theon basis. 但是瓦斯抽放方案设计没有科学的理论依据是目前存在的主要问题之一。
- A kind of hydraulics system for CKS-I hydraulic gas drainage drilling rig was designed. 介绍了一种自主设计的CKS-I型全液压瓦斯抽排放钻机的液压系统。
- The practice of gas measuring and gas drainage when shaft developed through gasy seams in Hudi mine is introduced. 介绍了胡底煤矿在竖井开凿遭遇高瓦斯煤层时,进行瓦斯测定和瓦斯抽排的工程实践。
- In order to obtain a good result of gas drainage in gob roof, the control methods of gas from goaf are discussed. 摘要为了在采空区顶板实施瓦斯抽放技术获得较高的瓦斯抽放效果，对采空区瓦斯治理方法进行了探讨。
- HDPE with fire retardance and antistatic property has been developed and used to make gas drainage pipe in the coalseams. 研制了具有阻燃及抗静电性能的HDPE,并将其用于制作煤层瓦斯抽放管。
- Research result shows that controlling blasting technique is feasible to improve gas drainage under suction in hardness and low dialyzing coal bed. 研究表明，该技术用于坚硬低透气煤层，提高矿井瓦斯抽放率是可行的。
- Gas drainage in high gassy coal seam with low gas permeability is always an hard solved significant technology problem in the process of safety production. 高瓦斯低透性煤层的瓦斯抽放,一直是煤矿安全生产过程中的重大技术难题。
- Through the testing research about gas drainage on outsize coal sample, the relativity of coal mass deformation and drainage quantity &time is opened out. 通过大煤样的瓦斯排放试验研究,揭示了顺序加载与逆序加载下的煤体变形与瓦斯排放量以及排放时间的相关性。
- The paper describes the determination of rational location of high-located gas drainage roadways in Laowuji Mine of Panjiang Coal & Electricity (Group)Company. 介绍了盘江煤电(集团)公司老屋基矿高位瓦斯抽放巷道合理位置确定的有关情况。
- It proved that gas drainage with high position bores and elevation bores can both reduce laneway digging work and get fairly good gas extracting result. 实践表明高位抽放与仰角抽放方法相结合,既可减少钻场施工,又有较好的抽放效果。
- The partial ventilator in the coal mine is an important equipment in mine digging,its dependability and efficiency affect directly the safety of gas drainage. 局部通风机是煤矿井下掘进过程的重要设备,其使用的可靠性和效能直接影响着瓦斯的安全排放。
- The model quantitatively describes the influence of gas production, gas drainage radius, gas pay thickness, and permeability, etc. on highness and distribution of water cones. 建立了底水气藏水锥高度与分布模型的求解方法:假定气相流动为平面径向流并不考虑气相非达西流动,可以求出模型的解析解;
- Mechanisms of MLHW consist in effectively communicating cleats and fracture system,increasing area of multiple laterals well bore spreading and gas drainage,decreasing resistance of two phas... 通过对沁水煤层气田的数值模拟与经济评价可知,用多分支水平井开发煤层气具有明显的经济效益优势。
- The application of the gas drainage technology in Donghai coal mine is introduced, including gas drainage in close coal layer, gas drainage in goaf, gas drainage from coal, and local gas drainage. 介绍瓦斯抽放在东海矿的应用,抽放方式为邻近层抽放、空区抽放、本煤层抽放及局部抽放。
- Rational use of gas drilling technical points, and rational layout borehole spacing, the integrated drilling technology, the efficiency of gas drainage has been effectively improved. 合理利用瓦斯钻孔技术要点,合理布置钻孔间距,综合各钻孔技术,是瓦斯抽放效率得到有效的提高。
- The latest progress in the directional drilling system and its various applications including in-seam methane drainage, gob gas drainage, coal mine methane commercial recovery, etc. are presented. 本文介绍了定向钻进系统的最新进展,以及它在许多方面的应用,其中包括煤层内瓦斯抽放,采空区瓦斯抽放,煤层气商业回收等。
- The author makes the proposal of establishing a preliminary underground gas drainage numerical model, which is the equivalent of boundary conditions and shift forward of initial conditions. 本文从数值模拟的角度提出了建立井下瓦斯抽放数值模型的初步方案,即将边界条件等效和模拟时间前推。
- In-situ stress field plays a important role in coal and gas outburst in Huainan mining area.It was suggested that in-situ stress field should be considered during the gas drainage design. 地应力场的以上特征对淮南矿区煤与瓦斯突出的发生具有重要作用，提出了在进行瓦斯抽放钻孔参数设计时应考虑地应力场特征的建议。
- The reasonable layer selection is the main influencing factors for gas drainage by high level borehole,the borehole parameters is based on the caving & fracture zone height of gob. 高位钻孔抽放最主要的影响因素是合理层位选择,其钻孔参数应根据采空区冒落带及裂隙带高度来设计。
