scholarly journals Calculation of blast hole charge amount based on three-dimensional solid model of blasting rock mass

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
YingXian Chen ◽  
PengFei Wang ◽  
Jian Chen ◽  
Meng Zhou ◽  
HongXia Yang ◽  
...  
Keyword(s):  
Rock Mass ◽  
Blast Hole ◽  
Three Dimensional ◽  
Open Pit ◽  
Solid Model ◽  
Mass Model ◽  
Hole Charge ◽  
Bench Blasting ◽  
Drilling Rigs ◽  
3D Solid

AbstractThe development and use of intelligent drilling rigs make it available to obtain accurate lithology data of blast drilling. In order to make full use of drilling data to improve blasting efficiency, the following research was carried out. First, a database is established to manage and store the blast hole data recognized by the intelligent drill. Secondly, the blast hole lithology data is taken as a sample, and the inverse distance square method is used to interpolate the blasting range's solid elements to generate a three-dimensional solid model of the blasting rock mass. Afterward, the blasting range polygon and stope triangle grid are used successively in the solid model to obtain the cut 3D solid model of the blasting rock mass; finally, the blast hole charge is calculated based on the cut 3D solid model of the blasting rock. The C++ programming language is used to realize all the blast hole charge amount processes based on the three-dimensional solid model of the blasting rock mass. With the application example of No. 918 bench blasting of Shengli Open-pit Coal Mine in Xilinhot, Inner Mongolia, the blast hole charge amount in the blasting area is calculated and compared with the results of single hole rock property calculation, the results show that the blast hole charge calculated by three-dimensional rock mass model can be effectively reduced.

Stochastic Three-Dimensional Joint Geometry Model and the Properties of REV for a Jointed Rock Mass

2014 ◽  
Vol 1079-1080 ◽  
pp. 266-271
Author(s):  
Wen Hui Tan ◽  
Zhong Hua Sun ◽  
Ning Li ◽  
Xiao Hong Jiang
Keyword(s):  
Rock Mass ◽  
Probability Distributions ◽  
Three Dimensional ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Open Pit ◽  
Mechanical Parameters ◽  
Geometry Model ◽  
Joint Geometry ◽  
3D Network

The lithology of rock mass isnon-homogeneity，anisotropy, andexists size effect. The mechanical parameters of rock mass gotten by engineeringapproaches cannot reflect these properties. Therefore, a newmethod of determining the mechanical parameters of jointed rock mass isproposed: gneiss in Shuichang open-pit mine was selected as a case, thefracture system of the rock mass was measured and analyzed by non-contactmeasuring system of 3GSM and probabilisticmethod,the probability distributions of geometry parameters were analyzed and a 3Djoint geometry model was made by using the program of 3D network modeling.Cubes with different sizes were selected to be tested by tri-axial compressionof numerical simulation with 3DEC based on the 3D network model of joints,thus, the REV and its mechanical parameters were determined, which providedcredible parameters for slope stability analysis.

Conversion of a GIS surface data directly to a 3D STL part for terrain modeling

2014 ◽  
Vol 20 (5) ◽  
pp. 422-430 ◽  
Author(s):  
Sanat Agrawal ◽  
Deon J. de Beer ◽  
Yashwant Kumar Modi
Keyword(s):  
Three Dimensional ◽  
Solid Model ◽  
Catchment Management ◽  
Data Loss ◽  
Terrain Modeling ◽  
Content Type ◽  
Terrain Models ◽  
File Formats ◽  
Surface Data ◽  
3D Solid

Purpose – This paper aims to convert surface data directly to a three-dimensional (3D) stereolithography (STL) part. The Geographic Information Systems (GIS) data available for a terrain are the data of its surface. It doesn’t have information for a solid model. The data need to be converted into a three-dimensional (3D) solid model for making physical models by additive manufacturing (AM). Design/methodology/approach – A methodology has been developed to make the wall and base of the part and tessellates the part with triangles. A program has been written which gives output of the part in STL file format. The elevation data are interpolated and any singularity present is removed. Extensive search techniques are used. Findings – AM technologies are increasingly being used for terrain modeling. However, there is not enough work done to convert the surface data into 3D solid model. The present work aids in this area. Practical implications – The methodology removes data loss associated with intermediate file formats. Terrain models can be created in less time and less cost. Intricate geometries of terrain can be created with ease and great accuracy. Social implications – The terrain models can be used for GIS education, educating the community for catchment management, conservation management, etc. Originality/value – The work allows direct and automated conversion of GIS surface data into a 3D STL part. It removes intermediate steps and any data loss associated with intermediate file formats.

scholarly journals Substantiating rational parameters of a method for shrinkage ore stoping while developing thin-vein steeply inclined deposits

2018 ◽  
Vol 60 ◽  
pp. 00022 ◽  
Author(s):  
Leonid Shyrin ◽  
Yevhenii Koroviaka ◽  
Valerii Rastsvietaiev ◽  
Oleksandr Denyshchenko
Keyword(s):  
Shock Wave ◽  
Wave Propagation ◽  
Rock Mass ◽  
Intermediate Layer ◽  
Blast Hole ◽  
Field Studies ◽  
Low Density ◽  
Practical Relevance ◽  
Vein Wall ◽  
Hole Charge

Objective of the paper is to substantiate rational ore-stoping technique while using small wells in the context of thin-vein steeply inclined deposit mining. The technique is based upon the repeated field studies and simulation of ore drawing processes for shrinkage ore stoping in terms of the oriented drilling of periphery holes. A design of a blast-hole charge with low-density porous intermediate layer has been proposed as a result as well as a mechanism of shock-wave propagation within rock mass in the process of thin steeply inclined vein stoping. Scientific novelty is represented by means of analytical results of scientific sources, and dependences of ore losses on the vein wall hypsometry resulting from shrinkage stoping in the context of the technique being proposed. Practical relevance is to substantiate rational parameters of the ore-stoping technique being proposed. The technique involves designs of blast-hole charges with low-density porous intermediate layer in stemming. Moreover, the technique proposes to place the intermediate low-density stemming layer right after a blast hole was charged with explosives and live primers were inserted.

Research on the CNC Machining Simulation Model Build and Realize Based on the Spiral Bevel Gear with Forming Method

2010 ◽  
Vol 146-147 ◽  
pp. 770-774
Author(s):  
De Ji Hu ◽  
Qing Guo Meng ◽  
Wei Zhao
Keyword(s):  
Three Dimensional ◽  
Bevel Gear ◽  
Cnc Machining ◽  
Solid Model ◽  
Spiral Bevel Gear ◽  
Machining Simulation ◽  
Spiral Bevel ◽  
3D Solid ◽  
Relationship Of ◽  
Gear Engagement

In view of the spiral bevel gear machined by the semi-generating means, a new method to create 3D solid model is proposed. The equation of tooth profile surface is deduced from the principles of spiral bevel gear engagement and cutting, according to the position relationship of the machine tool, the cutting tool and the workpiece, along with the cutting tooth process. Then the three-dimensional solid model of spiral bevel gear is developed with the delphi program using the known parameters and the above mathematic equations. The effectiveness of this method has been demonstrated.

Seismic attenuation spectra in rock mass characterization; a case study in open‐pit mining

Geophysics ◽  
1986 ◽  
Vol 51 (2) ◽  
pp. 302-323 ◽  
Author(s):  
R. P. Young ◽  
J. J. Hill
Keyword(s):  
Rock Mass ◽  
Three Dimensional ◽  
Seismic Attenuation ◽  
Phase Iii ◽  
Open Pit ◽  
Open Pit Mining ◽  
Rock Masses ◽  
Rock Mass Characterization ◽  
Fracture Anisotropy

The application of engineering geophysics to the characterization of rock masses is exemplified through a case study of three phases of a research project into the design of efficient blasting systems in open‐pit mining. Seismic experiments are used before and after mine blasting to monitor the efficiency of explosions in terms of rock fragmentation. Spectral analysis of seismic signals, after they have been used to interrogate rock masses, is used to compute preblast and postblast attenuation and velocity parameters. The results show that fragmentation efficiency of a mine blast and fracture anisotropy of a rock mass can be quantified in terms of three‐dimensional (3-D) attenuation spectra and polar anisotropy diagrams. These seismic data are correlated with the blast design and the energy used by the excavating dragline machine to dig to rock mass. An overview of the seismic attenuation technique and instrumentation used in the project (phases I and II) is given. A case study from phase III highlights the scope and interpretation of the relationship between excavation parameters and seismically characterized blasting efficiency.

Drawing and CNC Software System for Light Gage Steel Structure

2011 ◽  
Vol 328-330 ◽  
pp. 511-514
Author(s):  
Zhi Guo Chang ◽  
Hui Zhu Yang ◽  
Qi Lin Zhang
Keyword(s):  
Three Dimensional ◽  
Steel Structure ◽  
Numerical Control ◽  
Solid Model ◽  
Automatic Programming ◽  
Geometric Information ◽  
Cnc Programming ◽  
Design Requirements ◽  
3D Solid ◽  
Intelligent Model

The primary program development principles and techniques of detailed drawings and CNC programming based on three-dimensional solid model for light gage steel structure are discussed. Components of the structure with complex spatial relationships and construction details are shown directly, accurately and completely based on 3D solid model, and structure properties and design requirements are integrated into the intelligent model. Therefore, drawings and detailed drawings can be drawn and labeled automatically by projecting and hiding with the extracted geometric information of particular entities. Further more, an automatic programming method for computerized numerical control is proposed, and CNC program are encoded according to manufacture information of parts in the model.

scholarly journals Three-Dimensional Physical Model Test Study on Mining-Induced Strata Movement of Open-Pit Final Slope

2017 ◽  
Author(s):  
Kunpeng Gao ◽  
Guoxiang Yang ◽  
Nengxiong Xu
Keyword(s):  
Rock Mass ◽  
Physical Model ◽  
Model Test ◽  
Three Dimensional ◽  
Rock Joints ◽  
Open Pit ◽  
Physical Model Test ◽  
Surface Movement ◽  
Rock Mass Deformation ◽  
Mass Deformation

Strata and surface movement induced by mining under open-pit final slope is a huge threat to mine safety. Physical model test is an important method to study mining-induced strata and surface movement laws. Because of rock joints predominantly control rock mass deformation and failure, thus physical model test leaving out of consideration of rock joints is difficult to reflect the influence of rock joints on rock mass deformation. Therefore, this paper presents a three-dimensional physical model test considering simplified dominant rock joints. This test process includes the design of testing equipment, the construction of physical model with dominant rock joint sets, conduction of mining and deformation monitoring. And mining under eastern final slope of Yanqianshan iron mine was selected as a case to study the behavior of mining-induced strata and surface movement.

A 3D solid model reconstruction system from only two views for CAD/CAM/CAE/CNC

2020 ◽  
Vol 34 (22n24) ◽  
pp. 2040157
Author(s):  
Long Hoang
Keyword(s):  
Three Dimensional ◽  
Solid Model ◽  
Model Reconstruction ◽  
Geometric Information ◽  
3D Cad ◽  
3D Model Reconstruction ◽  
Cad Cam ◽  
Cad Models ◽  
The Subject ◽  
3D Solid

Three-dimensional (3D) CAD models are useful for applications in the areas of CAD/CAM/CAE/CAQ. A desirous trend creating this model is a 3D model reconstruction from views. With this method, geometric information can be easily entered into computers while continuing to use existing 2D drawings in modern applications. Most of the previous works used three views as the input despite many common parts represented by only two views. A reconstruction system using only two views is the subject of this work. The proposed method has been implemented and tested by an Objectarx 2015 program running on AutoCAD 2018. The resultant 3D Solid model has been evaluated for compatibility with CAM/CAQ/CNC systems.

Research and Development of Post-Process Software System Based on 3D Solid Model for New Type Residence Structure

2011 ◽  
Vol 243-249 ◽  
pp. 6192-6196
Author(s):  
Zhi Guo Chang
Keyword(s):  
Binary Data ◽  
Three Dimensional ◽  
Solid Model ◽  
Rural Residence ◽  
Software System ◽  
Geometric Information ◽  
Post Process ◽  
Data Output ◽  
New Type ◽  
3D Solid

In the paper, some difficulties and their solutions, about drawings, detailed drawings and CNC data output based on three-dimensional solid model for various forms of rural residence structures, are discussed. The complex spatial relationships and construction details can be shown directly, accurately and completely in drawings software system based on 3D solid model. Therefore, drawings and detailed drawings can be drawn and labeled automatically by projecting and hiding with the extracted geometric information of particular entities. Further more, in the software system, Manufacture information of components and parts in the 3D Solid model can be extracted and CNC data can be outputted with according to the required format, such as: the binary data, Excel tables, and so on.

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