煤岩组合体冲击破坏试验研究
发布时间：2018-10-26 20:27
【摘要】：近些年由于我国经济的快速腾飞,且工业产业在我国经济中占主要地位,我国的能源资源生产及消耗量日益增多。当地面矿产资源的开采日渐枯竭,世界各国许多矿产资源的挖掘深度也不断增加,我们称此为深部开采。但是随着开采的不断深入或者在深部采矿过程中,人们逐渐对深部复杂的岩层性能存在一些现有岩石力学理论无法对此作出很好的阐述。当开采深度不断增加时,许多复杂的地理与天然地质问题等也伴随产生,随之而来的煤矿安全事故时有发生,所以人们在巷道中的安全性受到极大的影响。其中煤岩组合岩体的动力扰动失稳也是地下工程中较为严峻的灾害之一。针对煤岩的动态力学特性,本文对SHPB实验装置进行了稍许改进,在入射杆与透射杆各贴两片应变片,以便更好的得到煤岩体的应力波形。通过计算发现一维应力理论不适用于煤岩体的波形计算,因此本文提出了对煤岩体的波形进行分层计算,并提出其计算公式。本文运用岩石力学、岩石冲击动力学等理论分析了动力扰动下层状岩体的动力学特性。通过层状在SHPB试验系统下的冲击破坏试验得出数据,并同时整理、分析数据以及同时对破坏后的试件进行研究分析后,得出冲击载荷下层状岩体试样的破坏过程分析。通过SHPB实验装置系统对层状岩体进行单轴冲击试验,并对实验结果数据的整理与分析,利用一维应力理论得到其应力-应变曲线,综合其试验后破裂特征与数据分析得到了煤岩组合体试样在单轴冲击下的破坏特征与整体强度分析。最后利用Ansys软件对煤岩组合体破坏规律进行仿真还原,同时对模拟结果与试验分析处理后的结果相结合,从动态力学性能的角度研究与分析煤岩组合体的动力学破坏机制。
[Abstract]:In recent years, due to the rapid development of our economy, and the industrial industry occupies the main position in our economy, the production and consumption of energy resources in our country is increasing day by day. When the surface mineral resources are exhausted day by day, the mining depth of many countries all over the world is also increasing, which we call deep mining. However, with the development of mining or in the process of deep mining, there are some existing rock mechanics theories that can not be explained well. With the increasing of mining depth, many complicated geographical and natural geological problems also come into being, and the coal mine safety accidents occur from time to time, so the safety of people in the roadway is greatly affected. The dynamic disturbance instability of coal rock mass is one of the severe disasters in underground engineering. According to the dynamic mechanical properties of coal and rock, the SHPB experimental device is improved slightly, two strain gauges are attached to the incident rod and the transmission rod respectively, so that the stress waveform of coal and rock mass can be obtained better. It is found that the one-dimensional stress theory is not suitable for the waveform calculation of coal and rock mass, so this paper puts forward the layered calculation of the waveform of coal and rock mass and its calculation formula. In this paper, the dynamic characteristics of layered rock mass under dynamic disturbance are analyzed by means of rock mechanics and rock impact dynamics. The data are obtained from the impact failure test of layered rock under SHPB test system. The data are analyzed and analyzed at the same time, and the failure process of layered rock samples under impact load is obtained after studying and analyzing the specimens after failure. Uniaxial impact test of layered rock mass was carried out by SHPB system. The stress-strain curves were obtained by one-dimensional stress theory. According to the fracture characteristics and data analysis after the test, the failure characteristics and overall strength analysis of coal and rock assemblage samples under uniaxial impact are obtained. Finally, the failure law of coal and rock assemblage is reduced by using Ansys software. At the same time, the dynamic failure mechanism of coal and rock assemblage is studied and analyzed from the point of view of dynamic mechanical properties by combining the simulation results with the results of experimental analysis and treatment.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD315.1
本文编号：2296855
[Abstract]:In recent years, due to the rapid development of our economy, and the industrial industry occupies the main position in our economy, the production and consumption of energy resources in our country is increasing day by day. When the surface mineral resources are exhausted day by day, the mining depth of many countries all over the world is also increasing, which we call deep mining. However, with the development of mining or in the process of deep mining, there are some existing rock mechanics theories that can not be explained well. With the increasing of mining depth, many complicated geographical and natural geological problems also come into being, and the coal mine safety accidents occur from time to time, so the safety of people in the roadway is greatly affected. The dynamic disturbance instability of coal rock mass is one of the severe disasters in underground engineering. According to the dynamic mechanical properties of coal and rock, the SHPB experimental device is improved slightly, two strain gauges are attached to the incident rod and the transmission rod respectively, so that the stress waveform of coal and rock mass can be obtained better. It is found that the one-dimensional stress theory is not suitable for the waveform calculation of coal and rock mass, so this paper puts forward the layered calculation of the waveform of coal and rock mass and its calculation formula. In this paper, the dynamic characteristics of layered rock mass under dynamic disturbance are analyzed by means of rock mechanics and rock impact dynamics. The data are obtained from the impact failure test of layered rock under SHPB test system. The data are analyzed and analyzed at the same time, and the failure process of layered rock samples under impact load is obtained after studying and analyzing the specimens after failure. Uniaxial impact test of layered rock mass was carried out by SHPB system. The stress-strain curves were obtained by one-dimensional stress theory. According to the fracture characteristics and data analysis after the test, the failure characteristics and overall strength analysis of coal and rock assemblage samples under uniaxial impact are obtained. Finally, the failure law of coal and rock assemblage is reduced by using Ansys software. At the same time, the dynamic failure mechanism of coal and rock assemblage is studied and analyzed from the point of view of dynamic mechanical properties by combining the simulation results with the results of experimental analysis and treatment.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD315.1
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