煤破坏电荷感应与冲击倾向性关系实验研究

发布时间：2018-04-01 23:22

本文选题：煤体　切入点：冲击倾向性　出处：《辽宁工程技术大学》2015年硕士论文

【摘要】：随着煤矿开采深度的不断增加,冲击地压灾害日趋严重,而煤体冲击倾向性是影响冲击地压的内在因素,应用电荷感应监测技术能更直接掌握煤体所处的应力状态,能更及时、准确地对冲击地压灾害进行监测预报并达到有效防治的目的。本文采用理论分析和实验室实验相结合的研究方法。理论分析了冲击倾向性各个指标反映的煤体破坏机制,实验研究了煤破坏电荷感应与冲击倾向性各个指标关系及不同含水率下煤破坏电荷感应与冲击倾向性关系。本文所做的主要工作以及创新点如下：分析抗压强度及其煤体破裂机制,实验研究煤破坏电荷感应与抗压强度关系。得出抗压强度越大,电荷衰减时间越短、累积电荷量越少,但单位时间电荷量越多。分析动态破坏时间及其反映的煤体破坏机制,实验研究煤破坏电荷感应与动态破坏时间关系。得出动态破坏时间越长,电荷衰减时间越长、累积电荷量越多,但单位时间电荷量越少。分析冲击能量指数及其反映的煤体破坏机制,实验研究煤破坏电荷感应与冲击能量指数关系。得出冲击能量指数越大,电荷衰减时间越短、累积电荷量越少,但单位时间电荷量越多。分析弹性能量指数及其反映的煤体破坏机制,实验研究煤破坏电荷感应与弹性能量指数关系。得出弹性能量指数越大,电荷衰减时间越短,但累积电荷量越多、单位时间电荷量越多。实验研究不同含水率下煤破坏电荷感应与冲击倾向性关系。得出随含水率增加,冲击倾向性各个指标(除动态破坏时间之外)均减小,电荷衰减时间和累积电荷量呈现出先增大后减小趋势。应用电荷感应监测技术研究煤破坏电荷感应与冲击倾向性关系为现场提供实验数据和参考,具有重要的理论和实际意义。
[Abstract]:With the increasing depth of coal mining, rock burst disaster is becoming more and more serious, and the coal burst tendency is the internal influencing factors of rockburst, the application of charge induction monitoring technology can more directly grasp the coal stress state, more timely, accurate monitoring and prediction of rockburst disasters and achieve effective prevention and treatment objective. This paper uses the research methods of theoretical analysis and laboratory experiments combined with theoretical analysis of the coal body reflect each index tendency impact failure mechanism, experimental study on the destruction of the coal charge induction and impact orientation of various indicators and different moisture content of coal damage charge induction and impact orientation relationship. The main work done in this paper and innovation are as follows: the analysis of compressive strength and coal fracture mechanism, experimental study of coal charge induced damage relations and compressive strength. The compressive strength is greater That charge decay time is shorter, the accumulated charge is less, but more time unit charge. Analysis of coal dynamic destruction time and the failure mechanism, failure and experimental study of coal charge induced dynamic destruction time. The dynamic failure time is longer, the charge decay time is longer, but the number of charge accumulation. Unit time charge less the amount of coal. Analysis of the impact energy index and the failure mechanism, failure experiment study of coal charge induction and impact energy index. The impact energy index is larger, the charge decay time is shorter, the accumulated charge is less, but more time charge of coal. The elastic energy index and its analysis the failure mechanism, experimental study of coal charge induction and destruction of the elastic energy index. The elastic energy index is larger, the charge decay time is shorter, but the cumulative amount of charge more per unit time The amount of charge more. Experiments under different moisture content of coal damage charge induction and impact orientation relationship. With the increase of water content of each index tends to impact (except dynamic failure time) decreased, charge decay time and charge accumulation increased first and then decreased. The application of the charge induction monitoring technology of coal damage charge induction and impact orientation relationship between the experimental data and reference for the site, has important theoretical and practical significance.

【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD324

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