This research aimed to establish an early-warning critical energy for coal instability based on the energy theory and acoustic emission characteristics of coal under triaxial compression. To obtain an early-warning critical strain energy …

Based on the S1201-2 large height mining in the 2–2 coal seam of Ningtiaota colliery with on-site microseismic measurement, physical simulation and theoretical analysis methods, this paper explores the rule of roof movement in thick coal seams …

Tunnel Boring Machine (TBM) penetration rate prediction is one of the most important problem in tunneling projects. Estimating of Tunnel Boring Machine (TBM) penetration rate can considerably reduce the costs of tunneling projects. In this study …

The current research on the deformation of buried pipeline under rockfall impact load is generally based on the analysis of the pipeline cross-sectional deformation, and the deformation caused by lateral deflection of pipeline is less considered.

This paper proposes a new design method for the axial capacity of driven piles in glacial deposits with the standard penetration test (SPT) based on a database of 53 full-scale pile load tests. These static load tests were conducted on driven …

This paper presents the effect of impact load and weathering of surrounding rockmass on the deformation behavior of urban underground structures. The FEM based numerical simulation is carried out by varying overburden depths, impact energy, and …

Understanding the compression behavior of volcanic ash soils is essential in the assessment of settlements in such materials. A series of one-dimensional and isotropic compression tests were carried out to investigate the primary and secondary …

Researches on the energy evolution of the key blocks is helpful to reveal the failure process of locked-segment type slope, whose stability is governed by the locked segment along the potential slip surface. In order to study the failure mechanism …

In order to reveal the mechanism of surrounding rock deformation and instability of soft rock roadway in 12# working face of Puhe coal mine, and synthetical analysis of the surrounding rock, deformation and failure of the roadway shows that the …

The occurrences of breakage and water inrush disasters of working face floor under mining above aquifer are increasing with the mining depth in China. Taking the working face floor above in some Mine as the research object, by theoretical analysis …

Total soil suction is considered to be the accumulative influence of matric and osmotic suction, assuming that the soil is biologically inert. However, there are several biological activities occurring in soil media, which result in the …

To optimize the prediction of structural geological conditions in the underground as of data collected at the surface, due to the usual great uncertainties involved, we discuss new perspectives for the construction of structural geological models …

This study investigates image-data-driven deep learning in the stability analysis of geosystems. For the purpose, the recent breakthrough in computer vision represented by the Convolutional Neural Network (CNN), which was later used as a core …

In the process of longwall top coal caving, the deformation and movement of the overlying hugely-thick conglomerate stratum (HTCS) directly affects the rock pressure behavior in the longwall. Based on conditions of the geology and mining of coal …

Estimating the goafs ahead of iron mine in advance is essential to ensure the safety of mining. Xishimen Iron Mine is located at Hebei Province, China, which faces high risk of collapse due to the goafs. To understand the geological conditions …

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 …

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 …

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 …

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 …

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 …