二氧化碳充装量与致裂效果的模拟分析

发布时间：2018-05-09 12:53

本文选题：二氧化碳爆破 + 充装量　；参考：《煤炭科学研究总院》2017年硕士论文

【摘要】：本文以潞安集团司马煤矿工作面增透为工程背景,以理论研究,数值模拟和现场试验研究相结合的研究方法,进行了爆破的数值模拟计算,开展了工作面煤层爆破增透试验。数值模拟部分进行了在不同充装量条件下影响半径的计算;试验采用流量法、示踪法分析爆破增透的影响范围。文章取得以下研究成果:首先进行二氧化碳的热力学分析,在忽略气体膨胀时在膨胀力做功的前提下,以液态二氧化碳蒸发到标况条件下释放的能量为参考,得到液态二氧化碳爆破时产生的能量。以材料力学为基础,根据广义胡克定律推算出二氧化碳爆破时的爆破压力。根据爆破理论,断裂力学理论以及煤体的结构特征,详细分析了液态二氧化碳爆破煤体的作用过程,以及各个作用阶段的破坏标准。利用有限元分析软件计算仅在充装量单一条件下的爆破模拟,并借助origin软件对计算结果进行了数据处理与分析得到三种不同充装量的爆破影响半径。以充装量1000g的二氧化碳爆破装置进行增透煤层试验,以流量观测法和示踪法相结合,测得爆破影响半径,与模拟所得出的结果相近。
[Abstract]:In this paper, based on the engineering background of antireflection in Sima coal face of Lu'an Group Group, and by the combination of theoretical research, numerical simulation and field test, the numerical simulation calculation of blasting is carried out, and the anti-penetration test of coal seam blasting in working face is carried out. In the part of numerical simulation, the influence radius is calculated under the condition of different filling quantity, and the influence range of blasting antireflection is analyzed by flow method and tracer method. The following research results are obtained: firstly, the thermodynamic analysis of carbon dioxide is carried out, and the energy released by evaporation of liquid carbon dioxide to the standard condition is taken as a reference, on the premise of neglecting the work done by the expansion of the gas under the expansion force. Get the energy generated by the explosion of liquid carbon dioxide. Based on the mechanics of materials, the blasting pressure of carbon dioxide blasting is calculated according to the generalized Hook's law. According to the blasting theory, fracture mechanics theory and the structure characteristics of coal body, the action process of liquid carbon dioxide blasting coal body and the failure standard of each action stage are analyzed in detail. The finite element analysis software is used to calculate the blasting simulation only under the condition of a single filling quantity, and the data processing and analysis of the calculated results with the help of origin software are carried out to obtain three kinds of blasting influence radii of different filling quantities. The antireflective coal seam test was carried out by filling 1000g carbon dioxide blasting device. The influence radius of blasting was obtained by combining flow observation method with tracer method, which is similar to the result obtained by simulation.
【学位授予单位】：煤炭科学研究总院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD713.3

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