1.
Analysis on mechanics of rock burst in hard floor under tectonic stress
构造应力下坚硬底板冲击地压机理分析
2.
it was built on a base of solid rock; he stood at the foot of the tower.
它的底部是一块坚硬的岩石；他站在塔的底部。
3.
the hard durable wood of any oak; used especially for furniture and flooring.
坚硬耐用的栎属树木料，尤其用于制家具和地板。
4.
The application of numerical simulation in big dip angle and hard roof control
数值仿真在大倾角坚硬顶板控制中应用
5.
The Research of Goaf Gas Emission Law about Hard Roof Comprehensive Mechanized Coal Mining Face;
坚硬顶板综放工作面采空区瓦斯涌出规律研究
6.
Prevention of Shear Failure of Hard Roof in Fully Mechanized Caving Face;
预防综放面坚硬顶板超前剪切破坏方法
7.
Study the technique of caving hanging roof in the condition of hard roof of room-and-pillar mining.;
房柱式开采坚硬顶板条件下悬顶放顶技术研究
8.
Wu 8 seam roof cycle hard to pressure on the impact of gas emission and response
坚硬顶板周期来压对瓦斯涌出的影响与对策
9.
Study on site test of directional hydraulic fracturing of hard roof
定向水力致裂坚硬顶板的现场试验研究
10.
STUDY OF CONTROL CAVING METHODS AND REASONABLE HANGING ROOF LENGTH ON HARD ROOF
坚硬顶板控制放顶方式及合理悬顶长度的研究
11.
Simulation of Hard Roof Weakening Ahead of Working Face with Fully Mechanized Caving
坚硬顶板综放工作面超前弱化模拟研究
12.
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
13.
Technology and Control of First Roof Caving at Fully Mechanized Coal Face with Hard and Massive Overlying Strata
厚层坚硬顶板综采工作面初次放顶技术管理
14.
Technological Study and Practice on Safe and Efficient Mining Under Hard-Roof Condition
坚硬顶板条件下安全高效开采技术研究与实践
15.
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
16.
Research and application of deep hole advance pre-blasting in hard roof of steeply dipping seam mining
大倾角坚硬顶板深孔超前预爆破研究与应用
17.
A study on the relations between hard roof strata behaviors and gas inrush
坚硬顶板矿压显现与瓦斯涌出关系研究
18.
Research on Reasonable Hanging Arch Length of Hard Roof in Fully Mechanized Coal Mining Face
综采工作面坚硬顶板合理悬顶长度研究