Comprehensive partition coupling numerical simulation method for the blasting lumpiness space
A numerical simulation, all-round technology, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve the problems of no numerical simulation technology, complexity of blasting process, large prediction error, etc. Efficiency improvement, accurate simulation, effect of efficient and accurate simulation
Active Publication Date: 2019-07-09
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Problems solved by technology
After years of development, the first two methods have become increasingly mature, but they have the shortcomings of relatively large prediction errors and time-consuming and labor-intensive problems.
Numerical simulation technology has many advantages such as low cost and high efficiency. However, due to the complexity of the blasting process, there is currently no efficient, accurate and suitable numerical simulation technology for the blasting block formation process.
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[0028] In this embodiment, the specific steps of the numerical simulation method for the omnidirectional partition coupling numerical simulation method of the blasting fragmentation space are as follows:
[0029] Step 1. According to the geometric dimensions of the excavated blasting object, use the LS-DYNA tool to establish a continuum numerical calculation model of the blasting object, which is denoted as the LS-DYNA model.
[0030] In this embodiment, the excavation and blasting object is a typical deep hole step blasting of a slope or stockyard blasting in a hydropower project. The parameters of the deep hole step blasting are as follows: the height of the step is 10m, the length of the blocked section of the blasthole is 2.5m, and the length of the resistance line is 3.5m. m. Using the LS-DYNA tool to establish a continuum numerical calculation model for this typical deep hole bench blasting, the constructed continuum numerical calculation model is shown in Figure 2(a), a...
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The invention provides a comprehensive partition coupling numerical simulation method for the blasting lumpiness space. The advantages of a continuous medium calculation method and a discontinuous medium calculation method are fully utilized so that efficient and accurate simulation of the blasting lumpiness is achieved. The lumpiness size of the blasting crushing area is small, and the influenceof the structural plane is small. The effect similar to that of simulation of a discontinuous medium calculation method can be achieved through simulation of the continuous medium calculation method,and the calculation efficiency is greatly improved. In a middle-far blasting area, the influence effect of a structural plane is remarkably enhanced, the size of the blasting lumpiness is increased atthe moment, an accurate simulation result can be obtained only by using a discontinuous medium calculation method, and therefore a DDA model is adopted for calculation. Due to the fact that only theDDA model is adopted to calculate the distribution of the blasting block degree with the large size, the calculation efficiency is greatly improved.
Description
technical field [0001] The invention relates to the technical field of engineering blasting, in particular to an efficient and fine blasting fragment space omnidirectional partition coupling numerical simulation method. Background technique [0002] The formation of lumpiness in the process of excavation and blasting of rock mass is a typical discontinuous-continuous dynamic response process. Most of the surface of the rock block formed by blasting is the weak surface of the original geological structure, and its number accounts for more than 80% of the total surface of the formed rock block. As the particle size decreases, the proportion of the influence of the original structural surface in the crushed surface gradually decreases. When the particle size is greater than 20mm to 80mm, the proportion controlled by the original structural surface reaches 50-75%. When the diameter is 10mm, the proportion of structural surface influence is 10%. [0003] There are three general...
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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06
Inventor 胡英国吴新霞赵根刘美山王金绪饶小康
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION