Results 201 to 210 of about 13,879 (267)
Simulation of directional crack propagation by energy-absorbing blasting in deep gob-side entry retaining under different lateral pressure coefficients. [PDF]
PLoS OneLiu N +5 more
europepmc +1 more source
Field investigation of the bearing behavior of grouted gravel pile composite foundations in Karst Terrain. [PDF]
PLoS OneZhang L, Yan C, Jiang C.
europepmc +1 more source
Theoretical study on the pressure relief range of the upper protected coal seam in protective layer mining. [PDF]
Sci RepZhan K, Zhang B, Wang M.
europepmc +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Borehole instabilities in the KTB main borehole
Journal of Geophysical Research: Solid Earth, 1997Borehole instability has been a central problem for drilling operations and borehole measurements within the German Continental Deep Drilling Project (KTB) main borehole, which has been drilled entirely through crystalline rocks, mostly paragneisses and metabasites.
Borm, G. +4 more
openaire +2 more sources
A Model of Planar Borehole Propagation
SIAM Journal on Applied Mathematics, 2017Summary: Drilling geometrically complex boreholes in the subsurface has been made possible with the development of downhole tools that steer the bit. This paper proposes a model of borehole propagation that can be used not only to predict the bit trajectory, here restricted to a vertical plane, but also to assess the conditions leading to abnormal ...
Luc Perneder +2 more
openaire +1 more source
Analysis of Dipole Antenna Eccentered in a Borehole for Borehole Radar
2007 4th International Workshop on, Advanced Ground Penetrating Radar, 2007In this paper, we analyze response of borehole radar that use an electrically small dipole antenna in an eccentric borehole. Our approach is an extended version of the pseudoanalytic formulation, which was previously applied for analysis of an induction logging tool. In order to verify the calculation method, we did two experiments.
S. Ebihara, Y. Inoue
openaire +1 more source
The Leading Edge, 2010
We now understand the electrical double layer that exists between the minerals that form the rock matrix and the bulk electrolyte which saturates the pores of the rock, at least in the steady state. It is the presence of this double layer that allows the link between the electrical properties and the fluid-flow properties of the rock to exist.
Paul W.J. Glover, Matthew D. Jackson
openaire +1 more source
We now understand the electrical double layer that exists between the minerals that form the rock matrix and the bulk electrolyte which saturates the pores of the rock, at least in the steady state. It is the presence of this double layer that allows the link between the electrical properties and the fluid-flow properties of the rock to exist.
Paul W.J. Glover, Matthew D. Jackson
openaire +1 more source
Resistivity Borehole Imaging in Challenging Borehole Environments
GEO 2010, 2010Until recently, the acquisition of resistivity borehole image data from well bores less than 6” in diameter has been impossible, due to the size of conventional borehole imaging tools currently available on the market. In addition, conventional deployment methods limit efficient rig time utilization and ultimately lead to higher risk and costs ...
openaire +1 more source