1.
Solution of High Gas Harder Coal Mining by Deep High-pressure Water
利用深孔高压注水解决高瓦斯较坚硬煤层开采
2.
The first caving roof sections in hard coal layers can effectively reduce the pressure during the course of caving and guarantee safe production and efficiency.
坚硬煤层顶板分段初次放顶,能够有效缓解放顶期间的顶板压力,保证安全生产,提高生产效率。
3.
Study on Technology of Hard and Thick Top-coal Weakening in Fully Mechanized Caving Faces in Binchang Mining District;
彬长坚硬厚煤层综放开采顶煤弱化技术研究
4.
Plowability of plow mining on thin and soft coal seam with hard roof
坚硬顶板松软薄煤层刨煤机开采可刨性研究
5.
Research on the Top Coal Caving and Drawing Characteristics of Caving Roof Coal Mining for Shallawly Buries and Hard-Thick Coal Seam;
浅埋藏坚硬特厚煤层放顶煤开采顶煤冒放性研究
6.
Rock pressure of high angle thick coal seam by numerical calculation
大倾角坚硬顶板厚煤层矿压规律数值计算
7.
Strata Behavior Features of Fully Mechanized Top Coal Caving Mining Face in Ultra Thick Seam with Hard Roof in Binchang Mining Area
彬长矿区坚硬特厚煤层综放面矿压显现特征
8.
Study on the Reasonable Retainning of the Waterproof Coal Pillar of Steep Medium & Thick Coal Seam with Hard Roof;
急倾斜坚硬顶板中厚煤层防水煤柱合理留设研究
9.
Research on Mining Method in Shallow and Adamancy Coal Seam of Xiegou Coal Mine in Xingxian Area
兴县矿区斜沟煤矿浅埋深坚硬厚煤层开采方法研究
10.
Study and Application on Stability of Hard and Massive Overlying Strata in Fully Mechanized Sublevel Caving Face;
综采放顶煤采场厚层坚硬顶板稳定性分析及应用
11.
Hard roof prone to bump coal seam:regularity of electro-magnetic radiation,its prediction and application
坚硬顶板易冲击煤层电磁辐射规律及其预测应用
12.
a hard glossy coating.
一种坚硬光滑的涂层。
13.
form a crust or a hard layer.
形成一个硬壳或坚硬的层。
14.
Research on Equipments Coordination for Shearer in Soft Coal Thin Seam with Hard Roof
硬顶软煤薄煤层滚筒采煤机设备配套研究
15.
incrustations of barnacles on the hull
藤壶附在船身上形成坚硬的外层.
16.
they found a bed of standstone.
这一地层的岩石非常坚硬。
17.
used to form a hard coating on a porous surface.
用在多孔表面形成坚硬的涂层。
18.
a paint that provides a hard glossy transparent coating.
能提供一种坚硬平滑的透明外层的漆。