... the anchors de- and re-stressable. For an easy, safe and reliable control of the anchor forces during tensioning, several strands were equipped with DYNA Force load sensors. To ensure the quality of construction, UTRACON GROUP used borehole endoscope to check groundwater, carter problem in borehole during...

... Abstract The fracture propagation process around the borehole under the static-dynamic loading is simulated by considering the inhomogeneity of rock material and statistic damage mechanics, and coupling COMSOL with Matlab. For some factors such as inhomogeneity of strength, layout of holes...

... in detail in authors’ various former publications. The GPGPU-parallelized HFDEM3D is then applied to model the rock fracture and fragmentation process by the detonation of a single borehole and simultaneous and consecutive detonations of multiple boreholes. 1. Introduction Blasting has been widely...

...-rich rock plate tectonics reservoir geomechanics rock type environmental science 861 mining-induced tremor geologist society iop publishing iop conf geological subdiscipline sedimentary rock structural geology reservoir characterization conference liability lw3102 strata borehole...

... construction. They are one of the major reasons why 90% of transportation infrastructure projects globally exceed their budgeted cost and why tunnelling project on average exceed their expected costs by 50% [1]. While traditional borehole investigation techniques help mitigate uncertainty in ground conditions...

... that the relative density becomes smaller as the depth of the soil layer is more deeply buried. After comparative analysis, the calculation results of the method in this paper are very close to the in-situ test of boreholes. It solves the problem of the difficulty in sampling deep-covered sandy soil in its original...

... introduce a new approach that involves the empirical integration of rock mechanical and geophysical parameters. Our novel approach provides an efficient alternative to the borehole tests for the estimation of rock mechanical parameters, such as the rock mass integrity coefficient ( Kv ). This approach gives...

... the size of fractures and boreholes as a significant modification of the Terzaghi method [5]. Fouché and Diebolt proposed an improved Terzaghi method, by employing the intersection angle and sample size as the parameters to correct the sampling bias [6]. Recently, Zhang et al. proposed a geometric...

... and designing boreholes heat exchanges. However, it is still challenging to collect accurate data about strata thermal conductivity. With the application of copper mesh heated optical cable, actively heated fiber (CMCH), optics based thermal response test (ATRT) offers the possibility of fast and accurate...

... of hydraulic fracturing, a quick-test device used in boreholes with an aperture of 31mm was developed to measure the in situ stress. An inversion software was programmed based on the multiple linear regression method to obtain the stress field. Lastly, three engineering cases were presented to introduce...

... Abstract The excavation of vertical boreholes is involved in several geotechnical engineering constructions. Earth pressure in the soil is released during the drilling process, resulting in soil stress redistribution and borehole contraction along the excavation surface. The stress...

... fracture and bedding planes on hydraulic fracture propagation, and few studies have explored the fracture propagation in the vicinity of a borehole. Therefore, the present paper intends to simulate the fracture propagation in the vicinity of a borehole under the joint impact of heterogeneity, natural...

... stress. geologist artificial intelligence geological subdiscipline mathematics of computing reservoir geomechanics conference geology borehole machine learning highway tunnel environmental science 861 tunnel reservoir characterization society iop publishing iop conf extra-long tunnel...

.... On the other hand, after decades of operation of the reservoir, some of the grouting curtains are gradually aging, which results in an increased leakage and making the dam in an unfavorable state. geologist leakage eigenvalue investigation borehole society iop publishing iop conf reliability...

... drilling cannot provide enough support force for the rock around borehole as that of conventional overbalanced drilling. Due to the combination influence of engineering and geological factors, the borehole rock is prone to instability during gas drilling, which can lead to rock blocks falling from the well...

... storage cavern environmental science 861 reservoir characterization underground water-sealed storage cavern conference tank borehole sedimentary rock natural gas storage cavern underground storage cavern construction geological subdiscipline society iop publishing iop conf underground space...

... from the same run of core. structural geology isrm international symposium specimen conductivity reservoir geomechanics Singapore sandstone Reservoir Characterization strength median value asian rock mechanics symposium 29 Upstream Oil & Gas borehole jurong rock deep...

... (GD), resistivity, magnetics, electromagnetic, seismic wave, seismic CT, gravity, sonic and ultrasonic methods have been extensively applied to the identification of strata interfaces at initial stage of geologic prospecting (1). In terms of technology, borehole penetrating test and coring...

... crystalline rock at 500m depth below ground surface and has a floodable volume of approx. 900m 3 . Information of fracture distribution has been obtained by borehole investigation and mapping of gallery walls. The change of hydraulic pressure, hydrochemical condition and rock deformation have been monitored...

...)) to investigate and identify the country's deep geology characteristics and identify sites suitable for such developments to support URA's development of the underground masterplan (Lim, 2018). reserves evaluation isrm international symposium assessment US government cavern borehole investigation...