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基于煤岩振动波能量衰减规律的岩爆防治系统研究

Research on rockburst prevention systems based on the attenuation law of coal and rock vibration wave energy.

作者信息

Rong Hai, Wang Zijian, Konicek Petr, Pan Liting, Tang Guoshui, Kajzar Vlastimil, Wang Yadi

机构信息

College of Mining, Liaoning Technical University, Fuxin, 123000, China.

Department of Geomechanics and Mining Research, Institute of Geonics of the Czech Academy of Sciences, Ostrava, 70800, Czech Republic.

出版信息

Sci Rep. 2024 Mar 18;14(1):6452. doi: 10.1038/s41598-024-57258-w.

DOI:10.1038/s41598-024-57258-w
PMID:38499599
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10948901/
Abstract

During the coal and rock mass fracture process, elastic properties are released and vibration waves are radiated outward. The energy attenuation characteristics of these waves can describe the cumulative damage and elastic energy accumulation of the mass. To investigate coal and rock mass failure characteristics and energy attenuation rules during rockburst, numerical simulation and laboratory testing were utilized to study the energy transfer laws under various parameters. Six variables, including elastic modulus, Poisson's ratio, bulk density, cohesion, internal friction angle, and void ratio, were selected to simulate the rockburst energy release process under different parameter combinations by adding surface pressure to the model. The coal and rock mass energy attenuation coefficient was obtained by fitting the node energy straight line using the least squares method. The six variables' influence on vibration wave energy transfer was obtained using analytic hierarchy process program written in MATLAB, and a comprehensive calculation formula was proposed. Using the energy attenuation coefficient, the rock layer energy diffusion distance was calculated and compared with the roof collapse rock layer step distance, resulting in the roof rock layer cutting distance determination. By roof rock strata precutting, rockburst occurrence can be prevented, ensuring safe and efficient coal mine production.

摘要

在煤岩体破裂过程中，弹性性质释放，振动波向外辐射。这些波的能量衰减特性可以描述岩体的累积损伤和弹性能量积累。为了研究岩爆过程中煤岩体的破坏特性和能量衰减规律，利用数值模拟和实验室试验研究了不同参数下的能量传递规律。通过在模型上施加表面压力，选择弹性模量、泊松比、体积密度、内聚力、内摩擦角和孔隙率六个变量来模拟不同参数组合下的岩爆能量释放过程。采用最小二乘法拟合节点能量直线得到煤岩体能量衰减系数。利用MATLAB编写的层次分析法程序得到六个变量对振动波能量传递的影响，并提出了综合计算公式。利用能量衰减系数计算岩层能量扩散距离，并与顶板垮落岩层步距进行比较，从而确定顶板岩层切割距离。通过对顶板岩层进行预切割，可以预防岩爆的发生，确保煤矿安全生产。

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