Hua-yang Dai

Hua-yang Dai
China University of Mining & Technology, Beijing · Department of Surveying and Land Use

PhD

About

44
Publications
4,607
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553
Citations
Citations since 2016
18 Research Items
465 Citations
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
Introduction
Skills and Expertise

Publications

Publications (44)
Article
Abstract: Mathematical modeling of surface deformations caused by underground mining operation is commonly carried out with the use of empirical, numerical or stochastic models. One of the most frequently applied models for prediction of the ground deformation in many countries is Knothe model. The model, developed by Knothe as a stochastic method,...
Article
Full-text available
Atmospheric pressure loading (APL) deformation is one component of nontectonic deformation for Global Navigation Satellite System (GNSS) time series and is a kind of deformation response caused by a redistribution of atmospheric pressure. In this paper, we present an atmospheric data processing strategy to compute the APL based on a spherical harmo...
Article
In this paper, a rank deficient adjustment model with inequality constrained is implemented to realise the conversion from the single-difference (SD) wide lane fractional cycle bias (WL-FCB) to undifferenced(UD) WL-FCB. The results are compared with the un-differential FCB published by Centre National d’Etudes Spatiales (CNES), and the temporal var...
Article
Full-text available
Background Above-ground biomass (AGB) is a basic agronomic parameter for field investigation and is frequently used to indicate crop growth status, the effects of agricultural management practices, and the ability to sequester carbon above and below ground. The conventional way to obtain AGB is to use destructive sampling methods that require manua...
Article
Full-text available
Background With environmental deterioration, natural resource scarcity, and rapid population growth, mankind is facing severe global food security problems. To meet future needs, it is necessary to accelerate progress in breeding for new varieties with high yield and strong resistance. However, the traditional phenotypic screening methods have some...
Data
The comparative analysis of results of the survey which is carried out with use of an electronic tachymeter and the land laser scanner at reclamation. The dump of a heap leaching of the Belaya Gorka site of the Rodnikovoye field is chosen as subject to survey. For correctness of comparison the electronic tachymetry and the laser scanner one class o...
Article
Full-text available
ABSTRACT Purpose. Study of the effectiveness of topographical survey methods when solving the main tasks of surveying support for the disturbed lands reclamation. Methods. Comparative analysis of the topographical survey results, which was conducted with the use of electronic total station and a surface laser scanner during reclamation. The heap le...
Article
Full-text available
The application of high-throughput phenotyping (HTP) techniques based on unmanned aerial vehicle (UAV) remote-sensing platforms to study large-scale population breeding opens the way to more efficient acquisition of dynamic phenotypic traits and provides new tools that should help close the gap between genotyping and traditional field-phenotyping m...
Article
Full-text available
The study of mining subsidence in China started in 1950s, which learned from the successful experience of the former Soviet Union, Poland, Germany and other countries. Over the past 60 years, remarkable progress has been made in subsidence prediction methods and control techniques. This paper introduces Chinese research situation of subsidence pred...
Article
In order to obtain deformation parameters in each block of Sichuan-Yunnan Region (SYG) in China by stages and establish a dynamic model about the variation of the strain rate fields and the surface expansion in this area, we taken the Global Positioning System (GPS) sites velocity in the region as constrained condition and taken advantage of the bl...
Article
Full-text available
Sand inrush disaster and ground destruction induced by high-strength mining in the Shendong coal field seriously threaten the normal operation of the mine and cause significant property losses and environmental disruption. The physical simulation experiment demonstrate that the roof of high-strength mining working face can be regarded as a “step be...
Article
Full-text available
The movement of rock strata and surface movement is a complicated process with the change of time and space, and the change of time and space is very important to the surface deformation. In order to predict the surface movement and deformation accurately in the process of coal mining, this paper analyzed and studied the influence function predicti...
Article
Full-text available
Subsidence due to underground coal mining caused considerable damage to the houses of Paifang village. In this work, damage levels (A-D according to Chinese National Guidelines) were determined by measuring the magnitude of cracks with a steel tape. Buildings were subdivided by structure, quality and location; differentiated structures included one...
Article
Taking geological and mining conditions in south No.5 Jiulong Coal Mine as example, according to the theory of strata movement, it was calculated and determined the height of water flowing fractured zone was 62.4 m and the height of waterproof coal and rock pillars was 70.0 m by mining Nos. 2, 3 and 4 coal seam groups under fault conditions in this...
Article
As an important means of virtual reality, image-based virtual space has become the key technology of strategy implementation of Digital Earth and Digital City, and the authenticity of walkthrough simulation is the focus of image-based virtual space systems. In this paper, we first analyzed the shortcomings and deficiencies of existing virtual space...
Article
Strip mining methodbackfill mining method and coordinated mining method are mainly used for strata movement control in China.But these methods with the disadvantage of low recovery ratio or high production.Soa new mining method was proposed that a small coal pillar is left and backfilling is performed on either one or both sides of the pillarfollow...
Article
Full-text available
Differential interferometric synthetic aperture radar (DInSAR) technology is a new method to monitor the dynamic surface subsidence. It can monitor the large scope of dynamic deformation process of surface subsidence basin and better reflect the surface subsidence form in different stages. But under the influence of factors such as noise and other...
Article
In order to study the rule of deformation prediction of coal mining subsidence in three-dimensional space, it is necessary to establish a three-dimensional geological model. This paper introduced the idea, construction methods and key technologies of three-dimensional geological modeling based on block method and arbitrary boundary conditions by us...
Article
The strata and surface movements have notable features of repeatedly mining subsidence cumulationwhen extra thick steeply inclined coal seam applied horizontal slice mining.And new prediction model was needed to establish for describing the shape of subsidence basin.Based on analysis of a large number of field observed data and similar model testac...
Article
Taking the geological condition of No.3 coal mine in Yaojie mining area as the prototypestudy on the strata movement mechanism and the regularity of surface movements of extrathick steeply inclined coal seam applied horizontal slice mining.The results show thatstrata stress arch structure is formed to control the strata movement in shallow mining s...
Article
A similar material simulation was conducted to study the special characteristics of the ground displacement and the surrounding rock deformation caused by mining activities of steep inclined multiple coal seams, based on the conditions at Muchengjian Datai Mine. The pattern of ground displacement and the collapse mechanism of surrounding rock were...
Article
The advanced working face model of DInSAR and GPS joint encryption observation was established based on the basic theory of mining subsidence. The two encryption times that are surge point and dramatic reduction point of surface subsidence velocity were obtained from this model. Therefore the effectiveness of surface dynamic deformation monitoring...
Article
To reveal the movement characteristics of rock and soil mass due to underground mining under thick unconsolidated layers, which are different from those of normal condition mining, the simulated material model test was employed to simulate the rock and soil mass movement laws in this paper, and the model test data were then compared with field subs...
Article
Full-text available
Using the advanced influence angles as examples, the calculation revision method is presented basing on the differential interference synthetic aperture radar (DInSAR) data obtained in West Cliff colliery mine in Australia. Through comparing the deviation between the actual advanced influence distance and the distance measured in DInSAR results, a...
Article
Full-text available
The movement and deformation processes of the overburden strata and ground surface, induced by underground mining, are affected by mining method, spatial relationships, geotechnical conditions of the rock strata and time. The authors reviewed and extended an existing classical prediction model of the dynamic subsidence, and proposed potential new r...
Article
Based on specific geology and mining conditions of certain coal working face in China, a series of numerical models under different unconsolidated layers thickness were respectively established by employing FLAC3D. The relationship between the unconsolidated layers thickness and surface movement laws was studied. Maximum surface subsidence, Maximum...
Article
By comprehensively analyzing the data of geology and mining, Kriging algorithm was introduced to analyze the thematic information of geological data, to rapidly extract mining parameters for predicting mining subsidence, and to effectively integrate geomorphology and predict information. As a result, the change information of water body is successf...
Article
In order to study the relationship of the alluvium thickness with surface movement and surface subsidence factor due to deep wide pillar mining, we built the numerical stimulation models for deep wide strip-pillar mining under specific geological and mining conditions of a certain coal mine by using the software FLAC3D. Using the newly built model,...
Article
On the basis of "holding-plate" theory, the mechanics analysis of "holding-plate" of overlying strata is further discussed with elastic slab theory, and its differentiation method between existence and rupture under a certain condition was set up in this paper. And then the relation between the existence and rupture of holding-plate and the dimensi...
Article
Similar material test, numerical simulation and spot observation were used for the pressure character study, and some law were reported, just as the complicity of roof movement, the dualism of periodic press, the developments of fallen area, the asymmetry of stress field and displacement field, and analyzed the cause of roadway support difficulty,...
Article
The subsidence characteristics of horizontally-sliced mechanized top-caving mining are different from those of either flat seam mining or steep-inclined middle-thick seam mining. Similar material model test was used to simulate the rock mass movement of steep-inclined super-thick coal seam of a coal mine. The results revealed the law of strata move...
Article
A phenomenon of sub-critical mining subsidence appears in Jiaoping mining area in Shaanxi Province, which is under the conditions of great mining depth, thick seam and fully-mechanized top-coal caving. By similar material tests, the relationships of ground movement with the width of working face, the size of face-separated pillar, and the lithologi...
Article
The strata movement induced by sub-critical extraction is a problem not receiving due attention because of its relatively small magnitude of deformation. However, with the increase of mining depth, sub-critical extraction has become a general phenomenon. This calls for an in-depth investigation into the characteristics of ground movements observed...
Article
The novel mining subsidence prediction model is developed with the dip angle of a bedded ore deposit as a variable. It is applicable for coal seams with a dip angle ranging from 0 to 90°. Application of the model for seams with varying dip angles well demonstrates it's good adaptability.
Article
In comparison with gently-inclined coal seams and strata, steeply-inclined strata more universally contain weak planes due to strenuous geologic process; in comparison with tectonic plane that cuts strata, interlayer weak plane can't affect overall perspective of mining subsidence. This paper deals with the influenced relations of the two condition...

Network

Cited By
    • GuangDong University of Technology
    • China University of Mining and Technology
    • National Engineering Research Center for Information Technology in Agriculture
    • Chinese Academy of Agricultural Sciences
    • National Engineering Research Center for Information Technology in Agriculture

Projects

Projects (3)
Project
Report 1 No. G2017001 is supported by China’s Belt and Road initiative. There are three main goals of the project: 1. To deepen the knowledge about research done on mining subsidence in China and Poland, 2. To develop a novel method for the damage risk assessment for the buildings/pipelines in China, 3. To apply InSAR for ground movements detection and to establish parameters of the models applied in order to predict ground deformation.