Adopting rectangle water mouth makes diamond cutting burden heavier along radius line from outside to inside and causes the rapid abrasion to works layer when diamonds in bit are distributed evenly and in the same quality.
通过理论分析和生产试验,论证了孕镶金刚石钻头工作层高度磨损不均的主要原因是:在金刚石等浓度分布和质量相同的情况下,因采用矩形水口使得唇面金刚石沿半径线由外向内切削工作负担逐渐加重所致。
A kind of material which was fit for the working layer of blast composite liner was successfully developed.
研究了一种适合于制造轧机复合衬板的工作层材料,对衬板材料的化学组成、各种合金元素的作用及其加入量、衬板熔炼和轧制工艺进行了深入研究,衬板工作层材料经油淬和中温回火后,硬度大于HRC60,抗拉强度大于1600MPa,冲击韧性大于18J/cm2,断裂韧性大于37MPa·m0 5。
Technology of Gas Outburst Elimination,Gas and Coal Dust Management with Water Injection in Coal Seam at Coal Face in "Three Soft" Coal Seam
“三软”煤层采煤工作面煤层注水消突治理瓦斯、煤尘技术
The Foundational Research on Water Infusion for Longwall Top Coal Caving Face in Para-Anthracite Seam;
低级无烟煤综放工作面煤层注水基础研究
Power Supply Plan for Thin-layers in Fully-mechanized Mining
煤矿井下薄煤层综采工作面供电方案
Technology Application Study on Hydraulic Pressing in Coal Face of Medium Hard Seam
中硬煤层采煤工作面水力压挤技术应用研究
Application of High-pressure Water Injection in Coal Seam at Fully Mechanized Caving Face
煤层高压注水在综采放顶煤工作面的应用
Thin Coal Bed Working Surface Coal Plow Complete Set Synthesis Picks the Equipment Shaping and Necessary
薄煤层工作面刨煤机成套综采设备选型与配套
Comprehensive Fire Prevention and Extinguishment Technology of Spontaneous Combustion Coal Seam in Fully-mechanized Coal Face with Narrow Coal Pillar
自燃煤层窄煤柱综采工作面综合防灭火技术
Study on the ground administration of mechanized top coal caving in heavy pitching seam
大倾角煤层综放工作面采场管理研究
Spalling Control Technology and Practices in Fully Mechanized Longwall Mining Face in Deep Inclined Soft Seam
大倾角软煤层综采工作面防片帮技术
Strata Behavior in Large Section Face of Steep Seams
急斜煤层大段高工作面矿压显现规律
Prevention Measures of Gangue Fleeing at Fully Mechanized Face in Great Inclined Angle Coal Seam
大倾角煤层综采工作面窜矸防治措施
Analysis on Passing through Fault on 71203 Mining Face in Shigetai Coal Mine
石圪台煤矿71203工作面过断层分析
Technology of Passing Through Faults Directly Using Explosion Method with Pre-retaining Coal at Face
工作面预留煤爆破法直接过断层技术
Determination of Proper Support Resistance in Working Face of Shallowly Buried Coal Seam
浅埋煤层工作面液压支架工作阻力的确定
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
Prevention and Control of Floor Pressurized Water in Coal Mining Face in Seam with Soft Roof,Soft Coal and Soft Floor in Chaohua Mine
超化煤矿三软煤层采煤工作面底板承压水的防治
Technique of Bottom Grouting Transformation at Second-1 Coal Seam,21041 Face of Gaocheng Coal Mine
告成煤矿21041工作面二1煤层底板注浆改造施工工艺
Optimization of the grouting technology in fully mechanized top coal caving mining face in polar broken thick seam
极破碎厚煤层综放工作面注浆工艺优化
