Disaster-inducing mechanism of the movement of high-position combination cantilever plate structures in non-uniform and extra-thick coal seam mining by ZHU Weibing, GUO Chunlei, LUO Xun, CHAI Faying, XIE Jianlin, CHAI Yi

“…Based on the flushing fluid leakage and drill falling during the drilling process of four ground boreholes, it was found that the fracture development height of the first mined 4 m thick oil shale liberated seam was only 75 m, located at the bottom boundary of subordinate key stratum 2. …”
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Spectral Analysis of Surface Wave for Empirical Elastic Design of Anchored Foundations by S. E. Chen, C. K. Ong

“…Despite being important, it is not practical to use conventional borehole method of subsurface exploration, which is labor intensive and costly, for estimating soil properties and anchor holding capacity. …”
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Instantaneous Rock Blasting Wave and Its Microscopic Characteristics during Interaction with Concrete by Shaoqin Huang, Lifeng Luan, Wanli Xing, Qunyi Liu

“…After the blasting test, four cracks from the borehole center toward the minimum burden appear at the model surface. …”
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Creep enhancement and sliding in a temperate, hard-bedded alpine glacier by J.-P. Roldán-Blasco, A. Gilbert, L. Piard, F. Gimbert, C. Vincent, O. Gagliardini, A. Togaibekov, A. Togaibekov, A. Walpersdorf, N. Maier

“…Our study provides further evidence that borehole inclinometry, combined with full-Stokes flow modeling, allows for the constraining of both ice rheology and basal friction at scales that cannot be inferred from surface velocity measurements alone.…”
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Dynamic Model and Quantitative Analysis of Stick-Slip Vibration in Horizontal Well by Baojin Wang, Zhongyang Wang, Fushen Ren

“…Then, finite element method (FEM) is employed to describe the model. The drillstring-borehole impact and friction, fluid-structure interaction, bit-rock interaction, and gravity are considered in this model. …”
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Study on Quality Inspection and Anti-Seepage Performance Evaluation of Karst Underground Dam Curtain by ZHANG Kai, SU Zhengyang, LIU Chengdong, SHEN Guangze, JIAO Jie

“…There are many problems in the quality inspection and anti-seepage performance evaluation of karst underground dam's curtain because of its special structure and environment.Taking a typical karst underground dam seepage prevention system in southwest China as the research object,this paper identifies the distribution and weak parts of the anti-seepage curtain through the high-density resistivity method,further verifies the accuracy of results from high-density resistivity method through local water pressure test in borehole,and analyzes the composition and corrosion type of precipitates by precipitation thermogravimetry.This study provides a feasible plan for the current quality inspection and anti-seepage performance evaluation of karst underground dam,has a strong engineering reference significance for the popularization and application of karst underground dam and its safety assurance in the operation period,and also serves as an important reference for the establishment and improvement of the performance evaluation system and monitoring mechanism for the seepage control of underground reservoirs in karst areas.…”
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Study on the Method for Measuring Stress on Rock Mass Excavation Surface under Extremely High Stress Conditions by Kai Ai, Xinhui Zhang, Chao Zhou

“…In the process of measurement, this method needs neither complete borehole core nor ultrahigh pressure equipment. On the contrary, the test equipment is easy to carry and operate on, suitable for rock mass surface stress measurement under extremely high stress conditions, and able to provide in situ stress measurements for cavern rockburst prevention and slope management.…”
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Field Measurement and Study on Overburden Fracture and Surface Subsidence Law of Solid Filling Mining under Buildings by Zhiyong Fu, Lujie Zhou, Kai Yu, Wanzhen Li, Hu Chen

“…Mine pressure monitoring and borehole peeping show that the overburden in solid filling mining is mainly a bending zone with relatively complete layered structure, and the overburden only develops a certain height of fault zone near the roof, without collapse. …”
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Research on Deformation Mechanisms of a High Geostress Soft Rock Roadway and Double-Shell Grouting Technology by Fengnian Wang, Shizhuang Chen, Pan Gao, Zhibiao Guo, Zhigang Tao

“…In addition, the effect of grouting is evaluated by borehole peeping and deformation monitoring. The results show that the double-shell grouting technology can effectively improve the overall mechanical properties of the surrounding coal and rock mass, preventing the large deformation and failure of the roadway. …”
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Numerical Simulation on the Basic Rules of Multihole Linear Codirectional Hydraulic Fracturing by Weiyong Lu, Yonglong Wang, Xin Zhang

“…The following results are demonstrated: (1) RFPA software can be very helpful to study the basic law of multihole linear codirectional hydraulic fracturing; (2) the process of multihole linear codirectional hydraulic fracturing can be divided into four stages: water injection boost, fracture initiation, stable fracture propagation, and fracture connection; and (3) multihole linear codirectional hydraulic fractures propagate along the direction of borehole distribution. Multihole codirectional hydraulic fracturing is influenced by the angle between the direction of the hole distribution and maximum principal stress, the difference of the principal stress, and the spacing of the boreholes. …”
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Classification of Layers Using Artificial Neural Networks in the Province of Kurdistan (Iran) by Semko Arefpanah, Alireza Sharafi, Alireza Gholamian

“…This was achieved by first presenting the network with information from various boreholes.…”
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Study on Numerical Simulation of Geometric Elements of Blasting Funnel Based on PFC5.0 by Wenle Gao, Zehua Zhang, Baojie Li, Kunpeng Li

“…The influence of various parameters (the peak pressure action coefficient of the borehole wall, explosive particle buried depth, and charge mode) in the explosive particle expansion method on blasting effect was investigated. …”
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Rock brittleness evaluation method based on the complete stress-strain curve by ChenYang Liu, Yong Wang, XiaoPei Zhang, LiZhi Du

“…Brittleness plays an important role in the brittle failure process of rocks, and is also one of the important mechanical properties of rocks and a key indicator in rock engineering such as hydraulic fracturing, tunnelling machine borehole drilling and rockburst prediction. Therefore, aiming at the applicability of the brittleness index, this paper summarizes and analyzes the existing brittleness indices based on different experimental methods. …”
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On the Efficiency of the Multi-Channel Analysis of Surface Wave Method for Shallow and Semi-Deep Loose Soil Layers by Kasgin Khaheshi Banab, Dariush Motazedian

“…The MASW velocity results compared with those of other geophysical approaches, such as seismic reflection/refraction methods and borehole data, where available, mostly confirming the capability of the MASW method to distinguish the high shear wave velocity contrast in the study area. …”
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Hydraulic Fracturing Breakdown Pressure and Prediction of Maximum Horizontal In Situ Stress by Ali Lakirouhani, Somaie Jolfaei

“…Also, the comparison of the numerical model with the classical criteria shows that the condition of using the classical criteria to determine the breakdown pressure is that the ratio of the initial crack length to the borehole radius is very small. Using the numerical model, 1,456 datasets were prepared to train an artificial neural network to predict the maximum horizontal stress. …”
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Failure and Ejection Behavior of Concrete Materials under Internal Blast by Haifu Wang, Jianguang Xiao, Yuanfeng Zheng, Qingbo Yu

“…On the wall of the prefabricated borehole, two types of fragmented concrete mass are analyzed, and bottom initiation is recommended to eject the fragmented concrete mass effectively. …”
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Experimental Investigation and Analysis of Dynamic Buckling of Drill String in Horizontal Well by Fushen Ren, Baojin Wang, Lei Zhao, Anhe Zhu

“…The differential equation of the dynamic buckling is established considering some various factors, including friction, the drill string-borehole interaction, and rotation, and the equations of the critical load of the sinusoidal buckling and the spiral buckling are derived. …”
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A Coupled Gas Flow-Mechanical Damage Model and Its Numerical Simulations on High Energy Gas Fracturing by Yu Bai, Li Sun, Chenhui Wei

“…Many radial cracks around the borehole are formed in HEGF and extended further in GF. …”
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Optimization and Practice for Partition Pressure Relief of Deep Mining Roadway Using Empty-Hole and Deep-Hole Blasting to Weaken Coal by Baobao Chen, Changyou Liu, Fengfeng Wu

“…In order to alleviate stress concentration of roadsides and prevent rockbursts, the large-diameter boreholes and deep-hole blasting are employed for partition pressure relief in the deep mining roadway. …”
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Numerical Study of Ground Vibrations Caused by Cylindrical Wave Propagation in a Rock Mass with a Structural Plane by Shaobo Chai, Wei Tian, Liyuan Yu, Hao Wang

“…Stress wave which is caused either by an explosion in a borehole or by an accidental explosion in a tunnel is supposed to be considered under certain circumstances when it propagates through the surrounding rock masses which contain holes in cylindrical form. …”
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