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蓄能落锤式动静组合加载试验系统研制及应用
Development and application of a testing system coupled static and dynamic loads with energy storage of drop hammer
投稿时间: 2016-10-12  最后修改时间: 2017-01-12
DOI:
中文关键词:  岩石力学  冲击地压  动静组合加载  试验系统
英文关键词:rock mechanics  rock burst  static-dynamic coupling loading  testing system
基金项目:辽宁省煤炭资源安全开采与洁净利用工程研究中心开放基金资助课题(LNTU15KF10)
作者单位E-mail
温彦凯 辽宁工程技术大学 494752066@qq.com 
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中文摘要:
      针对深部矿井中煤岩所处的高应力、强开采扰动等复杂的赋存环境特点,设计并研发蓄能落锤式动静组合加载试验系统,详细介绍该系统的结构特点、技术指标及功能等。该系统能够分别独立向试样施加轴向冲击载荷、轴向静载荷及侧向静载荷,实现试样不同动静组合加载。该系统所用试样尺寸大,向试样施加的冲击载荷更接近现场实际。采用冲击力传感器及动态应变仪等高精度传感器进行实时监测,记录试样应变及所受冲击载荷。利用该系统对煤样进行了相同轴向载荷与不同冲击载荷共同作用下的动静组合加载试验,实时采集煤样冲击过程中力与应变数据。通过绘制冲击过程煤样应力应变曲线,分析不同动静组合加载下煤样应力及应变的变化特点,通过观察煤样形态,分析煤样的破坏变形特征,初步研究不同动静组合条件下煤样的破坏变形规律。该系统的研制丰富深部高应力、强扰动等环境下岩石力学性质的研究手段,为防治冲击地压灾害提供科学的试验基础。
英文摘要:
      Based on the complex environments of high stress and strong disturbance of deep coal mine rock, a testing system coupled static and dynamic loads with energy storage of drop hammer is designed and developed, and the system structure, function and technical index are detailed introduced. The system can add axial impact load, axial static load and lateral static load to the sample individually and implement loads coupled different dynamic and static loads. The system use large size samples and the impact load added to the samples is more close to actual. The high precision sensors such as impact sensors and dynamic strain gauge for real-time monitoring are used to record the samples’ strain and impact load. Using the system a test of coal samples under coupled same static loads and different dynamic loads is conducted, the real-time impact force and the strain data are recorded. Through drawing the stress strain curve of coal samples of the impact process, the change of stress and strain characteristics of coal samples under different load is analyzed. Through the observation of coal sample, the damage deformation characteristics of coal samples are analyzed. The damage and deformation laws of coal samples under different combination of dynamic and static loads are preliminary studied. The development of the system enriches the mechanical properties’ study means of deep rock under the environment of high stress and strong disturbance, and provide scientific experiment basis for the prevention and treatment of impact ground pressure disasters.
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