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- large - diameter gas drainage well 大孔径瓦斯抽放孔
- Construction Practice of Heavy Calibre Gas Drainage Well in Extra Thickness Nappe Stratum 特厚推覆体地层中大口径瓦斯抽放井的施工实践
- Keywords large-scale bore well;gas drainage well;tri-cone combination bit;washover milling fishing tool;settlement of accident; 大孔径钻井;瓦斯抽放井;三牙轮组合钻头;套铣打捞器;事故处理;
- gas drainage well 瓦斯抽放井
- Transforming Mine Gas Drainage System and Raising Gas Drainage Rate? 粉尘作业人员的饮食要注意什么?
- 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。
- There are good ecological environment and view around, the high hypsography make the ventilation and drainage well. 周边有着良好的生态环境,景观极佳,地势较高,通风与排水条件较好。
- 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。
- In combination with the Yingbulu engineering,the author studied deeply the influence of drainage plan drainage well pit impervious curtain,drainage ditch drainage well on seepage field. 用有限元法结合英布鲁水电枢纽工程,对降水方案选择、基坑防渗帷幕、排水沟、排水井对基坑渗流场的影响进行了研究。
- 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。
- We are well served with gas in this town. 这个城镇煤气供应得很好。
- 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。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries