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Geotechnical and Geological Engineering OnlineFirst articles

22-08-2021 | Technical Note

Hydrofracturing in situ stress measurements of itabirite in the Brazilian Ferriferous Quadrangle and their limitations

This article presents a first attempt to carry out in situ stress measurements (magnitudes and orientations) of the itabirite in the Brazilian Ferriferous Quadrangle by hydraulic fracture testing at a depth of 399 m. Previous studies on this rock …

Authors:
Henrique de Andrade Penido, Rodrigo Peluci de Figueiredo, André Pacheco de Assis, Vidal Félix Navarro Torres, Juan Manuel Girao Sotomayor, Alessandro Guimarães

22-08-2021 | Original Paper

Study on Deformation and Supporting Measures of Mining Roadway with Compound Roof

The No. 3 coal seam is one of the primary mineable coal seams in Du’erping coal mine of Shanxi Coking Coal Group Co., Ltd. The direct roof of No. 3 coal seam is a compound roof with two layers of 0.3–0.5 m extremely soft coal seams in the unstable …

Authors:
Hongjuan Dong, Jinshan Zhang, Feng Zhang

21-08-2021 | Original Paper

Experimental study on bursting liability index of coal considering creep pre-damage

In order to explore the influence of creep pre-damage on bursting liability of coal and rock, the creep pre-damage treatment of coal with different stress levels (0%, 30%, 45%, and 60%) was carried out, and the bursting liability index test was …

Authors:
Weizhen Liu, HuaQing Yang

15-08-2021 | Original Paper

Influence of Grout’s Poisson Effect on Interfacial Shear Stress for Compression Anchor in Rock Mass

The distribution and magnitude of the shear stress at the interface between the grout of a compression anchor rod and rock are strongly affected by the Poisson effect. A new analytical equation of the influence coefficient of the Poisson effect is …

Authors:
Bingxiong Tu, Chao Liu, Lihua Zhang, Haitao Wang

14-08-2021 | Original Paper

Biofilm Formation and Effectiveness of Biosand Filtration Systems with Typical and Innovative Filter Media

Clean drinking water is a necessity and recycling stormwater and greywater has been more appealing in the recent decades to provide filtered water for drinking water and non-drinking water purposes. Biosand filters have been a popular filtering …

Authors:
Derek Emslie, Sumi Siddiqua, Bryn Crawford, Wayne Teece

14-08-2021 | Original Paper

Study on Reasonable Coal Pillar Width of Gob-Side Roadway Excavating with Multi-Layer Hard Roof in Western Deep Mine

Gob-side roadway excavating could not only notably reduce the loss of coal resources and improve the coal recovery rates, but also greatly mitigate the imbalance between excavation speed and production needs. However, it is difficult to determine …

Authors:
Changliang Han, Houqiang Yang, Nong Zhang, Xudong Li, Yitao Liu, Wentao Liu, Wei Yao

14-08-2021 | Original Paper

Research on Reasonable Width of Coal Pillars of Non-equal Width Isolated Working Face Heading Goaf in Deep Mine

Setting reasonable coal pillar is a key to ensure safe mining of island coal face heading goaf in deep mine. With the background of typical deeply buried non-equal width isolated working face 3201 heading goaf in one mine and based on the spatial …

Authors:
Weili Yang, Quande Wei, Zhonghui Wang, Zhizeng Zhang, Xiaocheng Qu, Jinglin Wen

12-08-2021 | Technical Note

Settlement Analysis of Açu Dam, Brazil

The Armando Ribeiro Gonçalves Dam, popularly known as The Açu Dam, is an important geotechnical construction in Rio Grande do Norte state, Northeastern of Brazil. The monitoring and analysis of strains in earth dams is essential to understanding …

Authors:
Andriele Nascimento de Souza, Aline Ribeiro da Silva, Olavo F. Santos Jr, Osvaldo de Freitas Neto

12-08-2021 | Original Paper

Predicting Tunnel Squeezing Using the SVM-BP Combination Model

Rock squeezing has a large influence on tunnel construction safety; thus, when designing and constructing tunnels it is highly important to use a reliable method for predicting tunnel squeezing from incomplete data. In this study, a combination …

Authors:
Zhen Huang, Minxing Liao, Haoliang Zhang, Jiabing Zhang, Shaokun Ma, Qixuan Zhu

11-08-2021 | Original Paper

Deformation Mechanism and Control Ttechnology of Surrounding Rock of the Roadway in a Steep Coal seam

This study combined theoretical analysis, numerical simulation via FLAC3D software, innovative design, and field measurements for establishing the mechanical model of the stressed coal rock and deriving the deformation and failure characteristics …

Authors:
Tu Hong-sheng, Liu Song-yong, Huang Chang-wen, Guo Chen-ye, Zhang Xiao-bo, You Zu-feng

11-08-2021 | Technical Note

Technical Note Calculation of Mohr-Coulomb Parameters for Rocks of Doha, Qatar

Among practitioners, designers and researchers, modern-day geotechnical software packages still predominantly use Mohr-Coulomb (MC) input modeling parameters, despite the immense computing power of today’s software and hardware. The same applies …

Author:
Hrvoje Vučemilović

10-08-2021 | Original Paper

Rock Type Identification Using Analysis of the Acoustic Signal Frequency Contents Propagated While Drilling Operation

One of the most important parameters specially in mining and oil drilling fields is the type of rocks. It is important to determine that rock structure is in which of the three categories of igneous, metamorphic, and sedimentary rocks. By …

Authors:
Mehrbod Khoshouei, Raheb Bagherpour, Mohammad Hossein Jalalian

10-08-2021 | Original Paper

Construction Technology of Micro Bench Cut Method for Weak Rock Tunnel with High In-situ Stress

Taking Shanyang tunnel of Dali to Ruili (DaRui) railway as background, the construction technology of micro bench cut method for weak rock tunnel with high in-situ stress is established by combining the full-fgenius tunnelling method and bench cut …

Authors:
Zhiyong Chen, Zhongxun Wang, Guoshao Su, Song Gao, Xiaochuan Hu

10-08-2021 | Original Paper

The Risk Assessment of Debris Flow Hazards in Zhouqu Based on the Projection Pursuit Classification Model

The debris flow hazards endanger the life and property safety of the people, so the investigation about the risk level assessment of debris flow has great significance to prevent its occurrence. Due to the randomness of debris flow hazards, the …

Authors:
X. B. Gu, J. L. Shao, S. T. Wu, Q. H. Wu, H. Bai

09-08-2021 | Original Paper

Cross-Hole Radar Fractures Detection of Tunnel Side Wall Based on Full Waveform Inversion and Reverse Time Migration

Cross-hole radar is a method for geophysical exploration of geological conditions between two holes that can meet the need for refined detection of fractures. Full waveform inversion and reverse time migration are usually used in geophysical data …

Authors:
Fahe Sun, Jiaxing Wang, Chuanyi Ma, Wenhan Li, Fengkai Zhang, Kerui Fan

08-08-2021 | Original Paper

A Large-Scale Model Test System for Stability Study of Tunnel Under Static-Dynamic Load

In order to study the stability of tunnels under static-dynamic load, a new large-scale static-dynamic model test system was developed. The system was composed of a static loading unit, a dynamic loading unit, a data acquisition unit and a test …

Authors:
Shucai Li, Bing Zhang, Hanpeng Wang, Wei Wang, Fei Xu, Qingchuan Li

07-08-2021 | Original Paper

Direct Search for Critical General Slip Surface of Slopes with Nonlinear Strength Envelope

The paper pertains to the development of a numerical approach of auto-searching the critical slip surface of general shape and the associated factor of safety using limit equilibrium method but adopting a nonlinear strength envelope of soil in the …

Authors:
G. Bhattacharya, P. K. Basudhar

07-08-2021 | Original Paper

Optimizing Method of Main Caverns in Large Underground Water-Sealed Storage Cavern

Underground water-sealed storage cavern is an important way for petroleum strategic reserve in China, which owns lots of outstanding advantages, such as low operating costs, high safety, and land resource conservation. As the major structure in …

Authors:
Yang An, E-Chuan Yan, Xing-Ming Li, Shao-Ping Huang

07-08-2021 | Original Paper

Evaluation of Surface Subsidence During TBM Construction of Urban Tunnels Based on Generalized Rheological Theory

During TBM construction of urban underground tunnels, it is necessary to strictly measure the surface subsidence, crown settlement inside the tunnel, clearance convergence, horizontal, and vertical displacement of pile wall. In this study, to …

Author:
Feng Wang

06-08-2021 | Original Paper

Analysis of Faults' Effect on the Stability of Surface Lignite Mining Areas Using the Distinct Element Method

Mining operations can drastically affect the stability of nearby areas. A representative case for this has been the Mavropigi mine, a part of an open-pit lignite mining complex in northwestern Greece. Mavropigi is a vast excavation that has …

Authors:
Marwan Al Heib, Ioannis E. Zevgolis, Alexandros I. Theocharis, Nikolaos C. Koukouzas, Stella Coccia