According to the time to form the blasting free face and the time for the broken rock flying, the paper discussed the rational delay time of each functional borehole in deep borehole blasting.
The surface-borehole 5-direction IP survey is one of widespread applied methods in in-hole IP surveying.
The relationship between pressure drop and flow rate doesn't obey Darcy's law around the borehole of horizontal Wells with high productivity.
Rescuers got a stark lesson after Utah's Crandall Canyon mine collapse in 2007, when nine people died. Only one mobile robot made it down a borehole and onto the mine's floor.
Site 782A (ODP,Leg125)lies on the eastern margin of the Izu Bonin forearc basin,about halfway between the active volcanic arc and the Izu Bonin trench in the western Pacific Ocean. The borehole 782A,476 8 m deep,was fully cored and described.
The results may be applied to analyze the stability of borehole or tunnel.
Making trajectory of borehole as far as possible to achieve ideal condition an preventing the phenomenon of dogleg .
A few thousand dollars spent on a borehole, a lifeline to the precious water deep underground, would transform those farmers' lives.
Based on fitting of measured borehole trajectory data and analysis of force and deformation of rod string of surface-driven screw pump, a model for hollow sucker rod system is established.
The basic failure mode of borehole is borehole avalanche and shear zone caused by bore instability.
Riser pipe: a four-foot-diameter steel pipe called a riser connects the ship to the borehole.
Lowering radioactive material into a borehole and measuring how well the radiation passes through the surrounding rock provides more information about what's down there.
Introduced in the paper are the principle and method of borehole elastic modulus inspection and sound wave inspection used in the quality inspection of grouted rock mass of a dam foundation.
Synthetic Mud: a viscous cocktail of minerals, polymers and seawater stabilizes the borehole walls.
The results of geophysical work along with fieldwork and borehole data directed us to new idea about geology of the deposit.
In borehole sonic logging, these may be the shear, flexural and Stoneley waves.
The mechanism of separation area water inrush indicates that probing and discharging borehole drilled to the separation area can prevent this kind of water inrush.
A borehole image of rock layers indicating an underground point bar.
Project workers this week began exploratory works in the riverbed outside the Palace of Westminster, where a borehole was sunk to analyse the ground conditions facing engineers digging the tunnel.
At present, the most popular trenchless pipeline installation method is guided boring, but in the guided boring cave-in of the borehole wall eternally are encountered in quicksand formation.
borehole corrected flow
This paper analyzes the quasi static current field boundary value problem in inhomogeneous media with a borehole.
It is a non linear inversion to calculate crustal stress field with collapse data of inclined borehole.
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