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- Protection Technology for Gas Drainage Hole 瓦斯抽放钻孔护孔技术探讨
- Practice of Deflection Prevention of Gas Drainage Hole 瓦斯抽排钻孔防偏斜实践
- Experimental Study on Extinguishing Fire in Gas Drainage Hole by Fine Spray 细水雾扑灭瓦斯抽放钻孔火灾的实验研究
- Practice and Cognition of Gas Drainage Hole Construction Along Roof Trend in Fully Mechanized Caving Coal Face 综放工作面顶板走向瓦斯抽放孔施工的实践与认识
- gas drainage hole 瓦斯抽放钻孔
- Gas Drainage of undischarged pressure hole at original coal seam is an indispensable link in coal mine production.The result of releasing gas depends on natural ventilated coefficient. 本煤层未卸压钻孔抽放,是煤矿生产系统中不可缺少的环节,由于煤层的天然透气系数不同,抽排瓦斯的效果也不同。
- Use a 5/8-inch drill bit, then a coarse cylindrical rasp to enlarge the drainage hole. 转一个5/8英寸的洞,然后用锉刀把这个“排水口”搞大点。
- Transforming Mine Gas Drainage System and Raising Gas Drainage Rate? 粉尘作业人员的饮食要注意什么?
- Place pump inside pot with the electrical cord running outside of the drainage hole, then use a silicone sealant to seal the hole. 把水泵固定在缸里,电线通过排水口拖到缸外,用硅胶把洞封好。
- Eight drainage holes ensure effective and safe drain. 8个引流孔,保证引流量,有效更安全。
- 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。
- The drainage hole nodes were treated as global net to avoid trouble and were considered as boundary nodes when the drainage holes were invalidated. 当排水孔失效,“开关器”关闭时只需把孔内结点作为内部点,避免了对失效排水孔按边界再处理的麻烦。
- 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。