A5027647728- Rock Mechanics and Modeling
- Geomechanics and Mining Engineering
- Geoscience and Mining Technology
- Coal Properties and Utilization
- Landslides and related hazards
- Hydrocarbon exploration and reservoir analysis
- Structural Engineering and Vibration Analysis
- Civil and Geotechnical Engineering Research
- Geotechnical and Geomechanical Engineering
- Geophysical Methods and Applications
- Structural Behavior of Reinforced Concrete
- Soil, Finite Element Methods
- Grouting, Rheology, and Soil Mechanics
- Drilling and Well Engineering
- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Soil Stabilization
- Geological Modeling and Analysis
- Geotechnical Engineering and Analysis
- Concrete Corrosion and Durability
- Industrial Gas Emission Control
- Lignin and Wood Chemistry
- Blasting Impact and Analysis
- Coal and Its By-products
- Geothermal Energy Systems and Applications
- Wind and Air Flow Studies
Tongji University
2017-2023
China University of Mining and Technology
2021-2023
State Key Laboratory of Coal Resources and Safe Mining
2023
Chongqing University
2011-2022
Ministry of Education of the People's Republic of China
2018-2022
Huaqiao University
2021
Dalian University of Technology
2010-2021
Dalian Jiaotong University
2021
Taiyuan University of Technology
2021
Shanxi Jincheng Anthracite Mining Group (China)
2020-2021
The controlled presplitting blasting technique is widely used in mining engineering to improve the permeability and gas extraction efficiency of coal seams. One key factors appropriate arrangement drainage holes, which can help quantity. To optimize drilling layout enhance gas-drainage efficiency, a series tests were conducted at Pingdingshan No. 8 mine. Based on analysis variations stress longitudinal-wave velocity different ranges, results show that distance 1 m from hole decreased...
Photovoltaic Power generation system is an important renewable energy mode, in order to maximize the power efficiency of photovoltaic system, it necessary use Maximum Point Tracking (MPPT) technology. MPPT technology designed monitor output voltage and current cell real time, adjust operating point make work at maximum point. In this paper, traditional disturbance observation method variable step conductance increment used are modeled compared, concluded that algorithm has high control...
Abstract The coupling of in situ stress, seepage, and fracture makes the strata exhibit complex strain behavior permeability evolution under stress path cyclic loading‐unloading. In this study, loading‐unloading experiments constant amplitude axial sandstone combination different initial confining pressures rates are conducted. experimental results show that heterogeneity sandstone, Poisson's ratio produced by adjacent loading‐unloading, pressure determine deformation characteristics lateral...
To investigate the deformation mechanisms of rock under hydrostatic stress, destructive experiments were conducted on sandstone different levels stress and Lode angles. The results reveal that shape strength envelope π plane gradually changes from Lade criterion to Drucker-Prage with an increase in stress. Normally, there exists a deviation between strain paths for porous rocks plane, decreases angle A failure hypothesis based structure was proposed reasons abovementioned phenomena. It found...
Purpose To study fracture characteristics of jointed rock masses under blasting load, the RFPA2D analysis software for dynamic rocks based on finite element method and statistical damage theory was used. Design/methodology/approach On this basis, research simulated process in with different joint geometrical mainly analysed influences distance from joints to holes, length joints, number angle masses. Findings The calculation results show that constant increase effects gradually reduced. Rock...
This study investigated the mechanism, prevention measures, and control methods for earthquake disasters typically occurring in mines with thick hard rock strata. A mine stope large faults strata Hebei Province was taken as background object. Then, theoretical analysis numerical simulation were adopted conjunction field monitoring to explore how horizontal stress evolves hanging roofs of such mines, potentially leading mining earthquakes. based on obtained results, a design method proposed...
Although the mechanical behaviors and flow aspects of sandstone have been previously investigated, studies effect intermediate principal stress (σ2) on strength, deformation, permeability are lacking. In this work, under true triaxial conditions were investigated using a newly developed geophysical apparatus. The experimental results showed that with increasing σ2, peak octahedral effective normal stress, shear increased, rate increase decreased. This is because larger coefficient b has an...
Code search aims to find code snippets from large-scale repositories based on the developer's query intent. A significant challenge for is semantic gap between programming language and natural language. Recent works have indicated that deep learning (DL) techniques can perform well by automatically relationships code. Among these DL-based approaches, state-of-the-art model TabCS, a two-stage attention-based search. However, TabCS still has two limitations: loss confusion. breaks structural...
In order to explore the impact of residual special-shaped coal pillars and fault disturbances on lower layered roadway, this study takes short-distance seam mining in Luwa Coal Mine as engineering background surrounding rock deformation mechanism along roadway fault-disturbed zone under pillars, it presents control technology conducts on-site industrial test verification. The shows that abutment pressures floor are distributed “three peaks two ridges”. part beneath is mainly disturbed by...
The water cooling system plays an important role in the high-voltage direct current (HVDC) converter station. To reduce leakage among metal components, a certain number of platinum electrodes are installed at distributary pipes. However, due to electric field distortion around electrode, over 66% faults contributed by frequently occurred sediment deposition on electrode. This paper proposed method predict dynamic behavior through built electro-mass transfer-velocity coupling model....
In situ stress is generally an anisotropic/true triaxial ( σ 1 > 2 3 ). Bedding weakens the continuity and integrity of coal. It critical to understand mechanical behaviour gas migration coal under true conditions. We performed experiments cubic samples investigate permeability evolution conditions by using newly developed geophysical apparatus. analysed effect principal stresses on deformation characteristics containing bedding planes. The results show that volumetric strain, states...
To determine the main factors controlling hydrogen sulfide enrichment in coal mines, #4 seam Binchang Xiaozhuang mine, China, was investigated. A new control method also tested on this seam. Using petrography, X-ray diffraction, and other techniques, reactions that generated were The affect physical chemical properties of its H2S are analyzed from perspectives thermal evolution temperature, gas adsorption, pore characteristics, total sulfur content, coal's reducibility index. In addition,...
Owing to design and operation limitations, most multi-zone variable air volume (VAV) systems in existing buildings still follow traditional techniques for ventilation. In recent ventilation research, studies focused on comparing a strategy with superior one, the comparison among strategies are relatively rare. this paper, four outdoor airflow control that commonly used VAV introduced discussed. The results illustrate phenomenon of uneven distribution conditioned spaces often occurs,...
The deterioration of existing bridges has become a major problem around the world. In paper, new model and an associated stress checking method are proposed for concrete box girders strengthened by external prestressing. called spatial grid can analyze all behaviors clearly transforming girder into discrete orthogonal grids which equivalent to plate elements. Then three-layer stresses employed as indices evaluate state initial check before strengthening reveals cracked potential cracking...