1.
Application of Large-diameter Borehole in the Process of Gas Comprehensive Management in Coal Face
大直径抽采钻孔在采面瓦斯综合治理中的应用
2.
Research on Parameters of Gas Drilling Bore in Steep Coal Seam Gob
急倾斜煤层采空区瓦斯抽采钻孔参数研究
3.
Construction Technology and Equipment for Gas Drainage Borehole Drilling in Underground Coal Mine
煤矿井下瓦斯抽采钻孔施工技术与装备
4.
Gas Drainage Technology of Goaf with Boreholes from Surface Ground of Tangshan Mine
唐山矿地面钻孔抽放采空区瓦斯技术
5.
Technology of 1000 meter directional borehole at large diameter for mine gas extraction
顶板大直径千米长钻孔抽采瓦斯技术
6.
Research on Maximize Technology of Extraction Mining with Drilling Through Coal Seam in Protective Coal Seam
保护层开采穿层钻孔抽采最大化技术研究
7.
Influencing factors to extraction efficiency of surface goaf hole
地面钻孔抽采采空区瓦斯效率影响因素
8.
Study on Technology of Surface Drillings Draining Pressure Relief Gas of Coal Seam by Protected;
地面钻孔抽采被保护层卸压瓦斯技术研究
9.
Application and analysis on high level borehole gas drainage technology in mined-out area
采空区高位钻孔瓦斯抽放技术应用与分析
10.
Application of Gas Extraction Technology by High-level Fracture Borehole in Fully Mechanized Caving Face of Thick Coal Seam
高位裂隙钻孔抽采技术在厚煤层综放面的应用
11.
Effect Forecast for Methane Drainage with Parallel Drilling along Coal Seam
顺煤层平行钻孔瓦斯抽采效果预测方法
12.
Gas drainage technique by 1000 m long and large diameter roof boreholes in high gas coal seam group
高瓦斯煤层群顶板大直径千米钻孔抽采技术
13.
Gas Drainage by Boring Near Seam at 43001 Coal Face
43001采煤工作面上邻近层穿层钻孔瓦斯抽放
14.
Study on the Law of Movement and Distribution of Gas in Semi-enclosed Goaf on the Condition of Surface Hole Drainage;
地面钻孔抽采条件下半封闭采空区瓦斯运移及分布规律研究
15.
Study on the Law of Movement and Distribution of Gas in Goaf on the Condition of Surface Hole Drainage
地面钻孔抽采条件下采空区瓦斯运移及分布规律研究
16.
Defining Efficient Influence Radium of Drilling Hole Gas Extracting by Using Gas Flow Theory
采用瓦斯流场理论确定钻孔瓦斯抽采有效影响半径
17.
Gas Drainage Technology with Borehole Through Protected Seam for Up Protective Seam Mining
开采上保护层被保护煤层穿层钻孔抽采瓦斯技术
18.
The Study on the Key Gas Drainage Technique by Long & large Diameter Roof Boreholes in Fully Mechanized Face
综采面顶板走向大直径长钻孔瓦斯抽采技术参数的研究