Results 81 to 90 of about 121,815 (293)

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

Deep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian, Xiaohui He, Kexue Wang, Yufei Wu, Guoxin Wang, Shaochen Zhang, Jun Yang   +6 more
wiley   +1 more source

A Comparison of Surface-to-Coal Mine Roadway TEM and Surface TEM Responses to Water-Enriched Bodies

IEEE Access, 2019
The surface transient electromagnetic method (TEM) is a geophysical technology normally used in detecting water-enriched zones. However, with an increase of mining depth, the accuracy and reliability of surface detection is gradually reduced, and surface
Jianghao Chang, Guoqiang Xue, Reza Malekian   +2 more
doaj   +1 more source

Present-day stress orientations and tectonic provinces of the NW Borneo collisional margin [PDF]

, 2010
Extent: 15p.Borehole failure observed on image and dipmeter logs from 55 petroleum wells across the NW Borneo collisional margin were used to determine maximum horizontal stress (σH) orientations; combined with seismic and outcrop data, they define seven
Agostinelli, Ali, Barton, Bell, Bell, Bell, Bol, Brudy, Christopher K. Morley, Franke, Hall, Hall, Hamilton, Hazebroek, Hazebroek, Heidbach, Hesse, Hillis, Hillis, Hinz, Hinz, Hiscott, Hutchison, Ingram, James, James Clark, King, King, King, King, King, Kirsch, Lambiase, Madon, Madon, Madon, Madon, Mandl, Mardia, Mark R. P. Tingay, Mastin, McGilvery, Michel, Milsom, Morley, Morley, Morley, Morley, Morley, Morley, Peška, Plumb, Richard R. Hillis, Richardson, Rosalind C. King, Sandal, Simons, Sonder, Sperner, Tan, Tingay, Tingay, Tingay, Tingay, Tingay, Tingay, Tingay, Townend, Van Viet, Yale, Yale, Yassir, Zhang, Zoback   +73 more
core   +2 more sources

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

The unique devonian sections of Dniepro-Donetsk cavity. Kolaidyntsy parametric well 413. Article 1

Мінеральні ресурси України, 2015
On results the boring drilling of mining hole 413 data of geophysical works were not confirmed about the depth of bedding of crystalline breeds of foundation and thickness of the Devonian sedimentations.
V. A. Ivanyshyn, L. P. Kononenko, O. L. Rakovska, S. V. Onufryshyn, Z. G. Voloshyna   +4 more
doaj  

Determining the angle of the frontal working surface of the soil-piercing head asymmetrical tip for static soil-piercin

Avtomobilʹnyj Transport (Harʹkov)
Problem. From the analysis of the technical literature, it was established that among the trenchless technologies for laying underground engineering communications and service pipelines, the technology with the possibility of forming a horizontally ...
Suponyev Vladimir, Ragulin Vitaliy, Oleksyn Volodymyr, Koval Oleksand, Koval Andrii, Vysokovych Yevhen   +5 more
doaj   +1 more source

Litho-stratigraphic and hydrogeological evaluation of groundwater system in parts of Benin Metropolis, Benin City Nigeria: The key to groundwater sustainability

Journal of Applied Sciences and Environmental Management, 2018
Previous studies revealed that soil properties play a significant role in aquifer contamination. Consequently, it is necessary to understand the nature and  properties of soil in carrying out groundwater evaluation.
O.M. Omorogieva, O.I. Imasuen
doaj   +1 more source

Dynamic geo‐hydrogeological monitoring‐driven situational awareness for real‐time floor water inrush risk prediction in deep mining

Deep Underground Science and Engineering, EarlyView.
The fused data extracted from the distributed monitoring system as the data basis, combined with dynamic geological data, are imported into a deep learning model. As the geological conditions of mining and excavation change, the risk of water inrush at the working face is retrieved in real time.
Yongjie Li, Huiyong Yin, Fangying Dong, Tao Wu, Chao Zhang   +4 more
wiley   +1 more source

Flux Analysis with the Application of Darcy’s Law Based on Borehole Data for Sustainable Groundwater Exploitation

Jurnal Ilmu Lingkungan
The potential for groundwater is very large and widely distributed in Aceh Besar District as indicated by the Groundwater Basin map. This potential is supported by the presence of sedimentary deposits consisting of materials such as gravel, sand and clay.
Zul Fadhli, Khaira Khirnica, Muhammad Syukri, Layna Miska, Yurda Marvita, Marwan Marwan, Dian Budi Dharma   +6 more
doaj   +1 more source

When water committee good practices are not relevant: sustainability of small water infrastructures in semi-arid Mozambique [PDF]

, 2014
This paper explores the contradiction between the need of large scale intervention in rural water supply and the needed flexibility to support community institutions by investigating the implementation of the Mozambican National Rural Water Supply and ...
Ducrot, Raphaèle
core