| 温彦凯,梁冰,孙维吉*.蓄能落锤式动静组合加载试验系统研制及应用[J].实验力学,2018,33(1):141~149 |
| 蓄能落锤式动静组合加载试验系统研制及应用 |
| On the development and application of an experimental system based on energy storage drop hammer combined static and dynamic loading |
| 投稿时间：2016-10-12 修订日期：2017-01-12 |
| DOI：10.7520/1001-4888-16-207 |
| 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 impact earth pressure combined static and dynamic 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) |
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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，本文详细介绍了该系统的结构特点、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。该系统的研制丰富了深部高应力、强扰动等环境下岩石力学性质的研究手段，可为防治冲击地压灾害提供科学的试验基础。 |
| 英文摘要: |
| According to deep coal mine complex environment characteristics of coal petrography subjected to high stress and strong mining disturbance, an experimental system based on energy storage drop hammer combined static and dynamic loading was designed and developed. Its structure, technical index and functions are detailed introduced in this paper. This system can exert axial impact load, axial static load and lateral static load to sample respectively to realize combined static and dynamic loading. This system use large size samples and the impact load exerted to sample is closer to actual situation. High precision sensors, such as impact force sensor and dynamic strain gauge were adopted to real-time monitor and recode the strain and impact loading of sample. Using this system, combined static and dynamic loading experiment was carried out for coal samples subjected to the same axial load and different impact loads. The impact force and strain data during loading process were real-time recorded. Through stress-strain curve of coal samples, the stress and strain variation of coal samples under different load was analyzed. Through the observation of coal sample, the damage deformation characteristics were analyzed. Damage and deformation patterns of coal samples under different combined dynamic and static loads were preliminary studied. Above developed experimental system has enriched the mechanical property's study means for deep rock under high stress and strong mining disturbance environment, and provide scientific experiment basis for prevention and treatment of impact earth pressure disasters. |
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