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详细介绍自主研发的煤岩剪切–渗流耦合试验装置的结构和功能。该装置系统包括伺服控制加载系统,流体源加载系统,剪切盒及其密封系统,控制与数据采集系统,煤岩断面三维扫描系统5个部分。其中,剪切密封系统可实现高性能综合试验条件下密封效果良好;伺服控制加载系统可提供常法向(剪切)荷载、常法向(剪切)位移加载方式以及不同荷载加载速率与不同位移加载速率的加载方式,并可通过控制与数据采集系统对试验全过程进行实时操控;流体源加载系统可提供高至5 MPa水头压力或气压,并保持稳定;试件剪切变形、法向变形采用位移传感器与变形传感器双重监测手段,可保证高精度条件下完成剪切–渗流耦合试验;煤岩断面三维扫描系统可采集煤岩断面三维信息,便于进一步研究断面特征与裂隙渗流耦合机制。利用该装置对完整砂岩进行试验,结果表明:该煤岩剪切–渗流耦合试验装置满足预期试验功能要求,试验过程稳定,操作简便,试验数据精度高。既可应用于研究裂隙岩体的水力学特性及岩质边坡滑坡机制,也可应用于开展原岩地应力状态及采动影响条件下煤层内部煤岩剪切破断过程及其与煤层瓦斯渗透性耦合机制的试验研究。
The structure and function of self-developed coal-rock shear-seepage coupling test device are introduced in detail. The device system consists of five parts: servo control loading system, fluid source loading system, shear box and its sealing system, control and data acquisition system, coal and rock section three-dimensional scanning system. Among them, the shear sealing system can achieve good sealing performance under high-performance integrated test conditions; servo control loading system can provide normal normal (shear) load, normal (shear) displacement load and different load loading rate and different Displacement load rate loading method, and through the control and data acquisition system for real-time control of the entire test process; fluid source loading system can provide up to 5 MPa head pressure or pressure, and maintain stability; specimen shear deformation, normal Deformation using displacement sensor and deformation sensor dual monitoring means to ensure the completion of shear-seepage coupling test under high precision conditions; coal and rock section three-dimensional scanning system can collect three-dimensional information of coal and rock sections for further study of cross-section characteristics and fracture seepage coupling mechanism. The complete sandstone is tested by the device. The results show that the coal - rock shear - seepage coupling test device meets the expected experimental functional requirements, the test process is stable, easy to operate and the experimental data are of high precision. It can be used to study the hydraulic characteristics of fractured rock mass and the landslide mechanism of rock slope. It can also be applied to the shear fracture process of coal and rock inside the coal seam under the influence of the original rock geostress and mining influence, Experimental Research on Coupling Mechanism.