... the drill rod diameters and by keeping the velocity of the drill rod constant. The geometry of the rods taken for the present study is cylindrical in shape. The extent of damage in the rock domain was assessed and compared for both percussive and rotational drilling techniques with cylindrical drill rods...

... compressive strength loading research university diameter deformation 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 042089 doi:10.1088/1755-1315/861/4/042089 Rapid in situ test and determination of dam foundation weak...

... robot deep-sea stratum drilling robot conference zhang society iop publishing iop conf diameter environmental science 861 drilling robot locomotion hydrate pipe 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 072031...

... geology geological subdiscipline initiation contour geologist reservoir characterization conference blasthole society iop publishing iop conf environmental science 861 diameter university lateral initiation journal modeling & simulation vibration experiment boundary...

..., shield method has been developed globally with increased buried depth, cross-section and distance. Sseveral super-diameter submarine and urban road tunnels have been constructed [6] . The traditional process of "driving forward, stopping, and assembling segments" has been maintained in such a "series...

... output of jacks. The stress distribution on the cutter-head was uneven, and the jack of various parts needed a different thrust output. When different shield-machines of various sizes were used for empty-pushing in several projects, the filling height of the pea gravel should be 60%–80% of the diameter...

... by comparing the surface settlement curve obtained through the analytical method and field measurement. Variations in rock deformation and rock stress are investigated using the proposed method in terms of the influence of gap parameter, deformation modulus, unit weight of the rock, and diameter and depth...

... efficiency [4]. high pressure high temperature complex reservoir geological subdiscipline geology modeling & simulation environmental science 861 characteristic vibration drilling equipment reservoir geomechanics displacement equation viscosity vibration characteristic diameter...

... bearing capacity can meet the design requirement of 11500 kN characteristic value. Test group 1 consisted of 3 piles (No. SZ01 to SZ03) with a diameter of 1.2 m. The pile tip of group 1 was into strongly weathered rock for 2.4 m with the pile length of 27.0∼28.5 m. Test group 2 consisted of 3 piles...

... to the classified standard of capillary pore systems, a pore diameter between 0.2 and 500 µm is referred to as a capillary pore and characterized by water flow in pore channels if the external force is greater than the capillary force [17]. The thickness of the absorption film on the surface of pore is generally...

... bed methane conference environmental science 861 geology coalbed methane society iop publishing iop conf bedding efficiency uniaxial compressive strength beijing diameter shear strength international petroleum technology conference 11th Conference of Asian Rock Mechanics Society IOP...

... interruption for long durations. Available cantilever type creep devices capable of carrying out various creep tests have been recently improved and used in this study. In addition, an impression creep device capable of applying a tip pressure up to 134 MPa for an indenter of 3 mm in diameter has been used...

... conference diameter Abstract Distinct Lattice Spring Model (DLSM) is a microscopic model to overcome the mismatch problem of degrees of freedom when coupling between discrete element method (DEM) and finite element method (FEM). In the original DLSM, the lattice model is composed of a number of same...

... sustainability sustainable development liquified natural gas (lng) absorber pipe environmental science 861 social responsibility society iop publishing iop conf tunnel lining ghe mergeformat thermal conductivity conference coefficient diameter zhang Abstract The energy...

... of mechanical tunneling and reduce the construction cost. In this study, three spherical teeth with different diameters were designed to perform indentation tests on Beishan granite under various penetration and spacing conditions. The rock fragmentation mechanisms of spherical teeth was analyzed through...

... induced by different cutters was studied as well. In the tests, 6 types of small-size cutters, considering the design parameters of cutter diameter, cutter tip width and cutter tip shape, were selected. The granite samples were collected from the Beishan site, Gansu province of China. For each test...

... publishing iop conf characteristic journal strength deformation characteristic environmental science 861 wellbore instability mechanism diameter conference residual strength wellbore integrity mpa specimen engineering 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf...

... geology geological subdiscipline overcut society iop publishing iop conf reservoir geomechanics jamming gripper tbm tbm jamming environmental science 861 geologist reservoir characterization deformation diameter excavation cutterhead shield jamming tunnel conference tunnel...

... channels. permeability organic-rich rock rock type geologist mudrock sedimentary rock clastic rock flow in porous media fractal dimension diameter particle environmental science 861 mudstone porosity fluid dynamics geology sandstone society iop publishing iop conf conference...

... production logging production monitoring thermal conductivity geotechnical engineering pipe nanjing 211189 southeast university equation exchanger investigation pcm enhanced recovery society iop publishing iop conf conference diameter coefficient 11th Conference of Asian Rock Mechanics...