煤矿动力灾害多参数耦合测定装置与关键技术研究

发布时间：2018-01-30 06:44

本文关键词： 煤矿动力灾害多参数耦合测定装置控制系统同步控制双阀并联　出处：《吉林大学》2015年硕士论文　论文类型：学位论文

【摘要】：煤矿动力灾害参数测试装置是用于测量煤矿动力灾害发生时煤岩和瓦斯的项指标参数，通过对各项数据的动态监测、分析、对比和处理，可以对煤矿动力灾害事故的发生进行预警，从而能够制定相应的措施来避免事故的发生造成人员伤亡和减少财产损失。现有的煤矿动力灾害参数测试装置主要包括围岩动力灾害测试装置和煤与瓦斯突出测试装置，两种测试装置相互独立，所测得的指标参数互不相关，不能同时测定围岩应力、瓦斯压力和温度等参数共同作用下对动力灾害的影响，不能揭示动力灾害发生的多因素耦合机理。本课题的主要来源是与黑龙江科技大学合作项目“煤矿动力灾害多参数耦合测定装置”，项目以实现对影响煤矿动力灾害产生的多种因素所对应的参数进行测定为目的，研发设计了此种装置。根据煤矿动力灾害预警技术的要求，装置可以实现对煤矿井下动力灾害发生时环境的模拟，测定煤矿动力灾害发生时煤矿的围岩应力、瓦斯压力和温度指标等参数。本课题主要论述了煤矿动力灾害多参数耦合测定装置的工作原理、控制系统的设计、结构实现和液压控制系统中的关键技术的研究。煤矿动力灾害多参数耦合测定装置整机的功能是通过将岩石力学测试技术和煤和瓦斯突出测试技术相结合来实现的，，即采用两组液压缸对密闭箱体中煤矿试件在两个方向上的压缩来实现对试件的单轴和双轴强度测试，采用加热系统和气动控制对装置密闭箱体内加热和充气来实现对煤矿井下温度和瓦斯压力的模拟。煤矿动力灾害多参数耦合测定装置包括控制系统和主机两大部分。装置的主机部分包括各种工作液压缸和其它部件，控制系统又包括液压气动控制系统、电气控制系统和加热系统三部分。液压气动控制系统主要实现对煤矿试件参数的测定，为了提高工作液压缸的同步运动精度和降低液压控制系统的压力，特别采用同步增压缸来驱动工作液压缸的工作。装置的电气控制系统由硬件部分和软件部分组成，主要用于控制装置主机和液压气动系统的运行动作，控制系统的软件部分是特别根据装置工作要求设计的测控软件，主要用于对试验参数的显示、控制、分析和处理。加热系统主要用于对主机密闭箱体内进行加热，实现煤矿试件在矿井内温度环境的真实模拟。工作液压缸同步运动的控制系统特采用比例电磁换向阀和溢流节流阀双阀并联控制。通过对两种液压阀的静态、动态特性的分析，得出本控制系统在一定的条件下，比例电磁换向阀和溢流节流阀双阀并联的使用有利于提高液压控制系统的平稳性，从而提高工作液压缸运动的稳定性的结论。对双阀并联控制和比例电磁换向阀单独控制的两种工作情况进行了实验验证，得出双阀并联控制与比例电磁换向阀单独控制相比系统的稳定性更高的结论。
[Abstract]:The coal mine dynamic disaster parameter testing device is used to measure the coal rock and gas when the coal power disaster occurs, through the dynamic monitoring, analysis, contrast and treatment of the data. Can carry on the early warning to the coal mine power disaster accident. Therefore, relevant measures can be made to avoid casualties and reduce property losses caused by accidents. The existing testing equipment for dynamic disaster parameters of coal mine mainly includes the dynamic disaster testing device of surrounding rock and coal and gas outburst measurement. Test device. The two test devices are independent of each other and the parameters measured are not related to each other, and the influence of the parameters such as surrounding rock stress, gas pressure and temperature on the dynamic disaster can not be measured simultaneously. It is not possible to reveal the coupling mechanism of multiple factors in the occurrence of dynamic disasters. The main source of this subject is the project "Multi-parameter Coupling measuring device of Coal Mine dynamic disaster", which is a cooperative project with Heilongjiang University of Science and Technology. In order to realize the determination of the parameters corresponding to many factors that affect the dynamic disaster of coal mine, the project has developed and designed this device. According to the requirements of the early warning technology of coal mine power disaster. The device can simulate the environment of underground power disaster and measure the surrounding rock stress of coal mine. This paper mainly discusses the working principle and the design of control system of multi-parameter coupling measuring device for coal mine power disaster. Structure realization and the research of key technology in hydraulic control system. The function of multi-parameter coupling measuring device for coal mine dynamic disaster is realized by combining rock mechanics test technology with coal and gas outburst test technology. That is to say, two groups of hydraulic cylinders are used to compress the coal mine specimens in two directions to test the uniaxial and biaxial strength of the specimens. The heating system and pneumatic control are used to heat and inflate the airtight box of the device to simulate the temperature and gas pressure in coal mine. The multi-parameter coupling measuring device of coal mine power disaster includes two parts: the control system and the main engine. The main part of the device includes various working cylinders and other parts, and the control system includes the hydraulic pneumatic control system. The hydraulic pneumatic control system mainly realizes the measurement of the parameters of the coal mine specimen in order to improve the synchronous motion accuracy of the working hydraulic cylinder and reduce the pressure of the hydraulic control system. The electric control system of the device is composed of hardware part and software part, which is mainly used to control the operation of the main engine and hydraulic pneumatic system of the device. The software part of the control system is specially designed according to the working requirements of the device, which is mainly used to display and control the test parameters. Analysis and treatment. The heating system is mainly used to heat the airtight box of the main engine to realize the real simulation of the temperature environment of the coal mine specimen. The control system of the synchronous movement of the working hydraulic cylinder is controlled in parallel by the proportional electromagnetic directional valve and the relief throttle valve in parallel. The static and dynamic characteristics of the two hydraulic valves are analyzed. It is concluded that the parallel use of the proportional electromagnetic directional valve and the relief throttle valve in parallel is beneficial to the improvement of the stability of the hydraulic control system under certain conditions. In order to improve the stability of the working hydraulic cylinder motion, two kinds of working conditions are verified by experiments, namely, the parallel control of two valves and the separate control of proportional electromagnetic directional valve. It is concluded that the stability of the system is higher than that of the parallel control of the double valve and the control of the proportional electromagnetic directional valve alone.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD76

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