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Method for simulating discrete element muck pile form

A simulation method and discrete element technology, applied in the fields of instrumentation, calculation, electrical and digital data processing, etc., can solve the problems of low accuracy of blasting shape simulation, inability to reflect the essence of blasting, and large workload, etc., to reduce computing time and The effect of resource occupation, improving efficiency and reducing workload

Inactive Publication Date: 2014-12-24
WUHAN UNIV
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Problems solved by technology

Therefore, the traditional discrete element blasting pile shape simulation method cannot reflect the essence of blasting, not only the workload is heavy, but also the accuracy of blasting pile shape simulation is not high

Method used

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  • Method for simulating discrete element muck pile form
  • Method for simulating discrete element muck pile form
  • Method for simulating discrete element muck pile form

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Embodiment Construction

[0026] The present invention firstly assigns the mechanical parameter values ​​of the complete rock mass to the mechanical parameters of the artificial joints to ensure that the artificial discretization does not affect the mechanical properties of the rock mass; then, calculates the predicted blasting fragmentation of each part of the rock mass model according to the Harris blasting theory; According to the numerical calculation, the model needs to be divided into partitions, and the average blasting fragmentation in each area is used as the fragmentation of discrete blocks; finally, the preset fragmentation or model partition can be corrected according to the results of blasting pile simulation.

[0027] Concrete flowchart of the present invention sees figure 1 , which will be combined below figure 1 The steps of the method of the present invention are further described.

[0028] Step 1. Assign the mechanical parameters of the artificial joints in the discrete element progr...

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Abstract

The invention discloses a method for simulating a discrete element muck pile form. The method comprises the steps of step 1, respectively giving a bulk modulus and a shear modulus of an integrated rock mass to normal lumpiness and shear lumpiness of an artificial joint; step 2, forecasting forecasted blasting lumpiness of all points in positions which are away from the center of a blast hole in different distances by adopting a Harries blasting model aiming at an integrated rock mass model; step 3, zoning the integrated rock mass model, and taking an average value of the forecasted blasting lumpiness of all points in all zones as preset lumpiness of discrete blocks in the all zones; step 4, setting the artificial joint according to the preset lumpiness of the discrete blocks in the all zones, setting the artificial joint in an oblique and orthogonal way, and dispersing the integrated rock mass model by adopting a discrete element method; step 5, carrying out muck pile form simulation on the dispersed integrated rock mass model by adopting the discrete element method. The method disclosed by the invention has the advantages that the operation is simple, the efficiency and the accuracy of muck pile form simulation can be obviously increased, the discrete element muck pile form is more accordant with engineering practice, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of numerical simulation of blasting in geotechnical engineering, and in particular relates to a method for simulating the shape of a discrete element blast pile. Background technique [0002] At present, the simulation of blast pile shape in engineering blasting is one of the most important research topics in blasting numerical simulation. With the development of computer simulation technology, the numerical simulation method suitable for discrete elements has gradually become a powerful tool for blasting research. DEM considers discontinuous surfaces as the boundary conditions of discrete blocks, which can simulate large deformations, allow relative motion between discrete blocks, and do not need to satisfy the displacement continuity and deformation coordination conditions, which is very suitable for the simulation of burst pile morphology. [0003] When simulating the formation process of the explosion p...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20F42D3/04G06F30/25G06F2119/14
Inventor 严鹏周旺潇卢文波陈明周创兵
Owner WUHAN UNIV
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