1.
Research on the Deformation Rule of Surface Movement Caused by Mining under the Conditions of Thick Alluvium and Hard Solid Rock;
厚松散层厚硬岩层开采地表移动变形规律研究
2.
Research and Application of Diamond-impregnated PDC Bit or Drilling in Medium Hard Rock Formation
中硬岩层钻进孕镶金刚石复合片钻头的研究与应用
3.
2. In flat dip layer, the seam thickness control the stability of the wall rock, the thick-bedded hard rock is stable than the thin-bedded hard rock.
② 岩层厚度在缓倾斜时对围岩稳定起控制作用，厚层硬岩整体稳定性好于薄层状硬岩。
4.
Research on Tunneling Technology in Hard and Mix Ground by Shield Machine;
盾构在硬岩及软硬不均地层施工技术研究
5.
A crust appears to have formed over the volcanic rubble.
火山熔岩表面似乎形成了一层硬壳。
6.
they found a bed of standstone.
这一地层的岩石非常坚硬。
7.
Technique of Putting in Stalk Through Pulling Apart Core in Coring with the Long Core Barrel in Sichuan Hard Rocks
硬地层拨断岩心接单根长筒取心技术
8.
It may be gouge of finely comminuted rock material with perhaps large blocks of the harder rocks embedded in it.
可能是磨碎的岩层物质组成的断层流，并夹杂一些大块坚硬岩石。
9.
Research on the Minimum Rock Cover Thickness of Underwater Tunnel in Alternating Layers of Hard and Soft Rocks;
软硬岩交互地层水下隧道最小岩石覆盖层厚度研究
10.
The cycle repeated over and over again, building up a series of crusty, crumbly layers.
这样的循环一次次重复，形成了一层层硬且易碎的岩层。
11.
If there had not been a hard layer of rock beneath the soil,
如果不是因为土壤下面有一层坚硬的岩石，
12.
Study on Electroplated Diamond Bit for Extra-hard, Compact and Weak-abrasiveness Formation;
坚硬致密弱研磨性岩层电镀金刚石钻头研究
13.
Development and Application of Wire-line Coring Bit for Hard and Compact Rock Formation
坚硬致密岩层用绳索取心钻头的研制与应用
14.
Analysis on explosion parameters of blast seismic exploration in carbonatite rock
硬岩地层爆破地震勘探的激发因素分析
15.
Open Hole Drilling with Cemented Carbide in Songyuan Oil Shale Formation
松原油页岩地层硬质合金裸孔钻进技术
16.
Key Technologies of Long-Distance Shield Boring in Hard Rock
长距离硬岩地层盾构施工关键技术研究
17.
ANALYSIS OF CUT ROCK SLOPE FAILURE MODES WITH THICK SOFT-HARD INTER-BEDDINGS IN FULING COUNTY,CHONGQING
重庆市涪陵区厚层软硬相间岩体失稳模式
18.
Technology of Safety and High Efficiency Mining Face under Extremely Hard and Thick Igneous Roof
特硬厚层火成岩顶板工作面安全高效开采技术