电容式矿井防灭火固液两相浆液参数测量研究

Study on measurement of solid-liquid two-phase slurry parameters for capacitive mine fire prevention and extinguishing

井下火灾作为煤矿开采中的重大事故,不仅对煤炭开采产生严重影响,更威胁着井下作业人员的生命安全。针对灌浆防灭火技术中浆液中固相沉积或堵塞问题,采用电容传感器对浆液速度参数进行精准测量。通过仿真研究,结合对影响因素和电容传感器灵敏度的分析,设计了适用于煤矿环境的电容传感器结构及几何尺寸,选择电极宽度为35 mm、电极间距为70 mm;同时,设计了电容传感器变送器,并结合上位机LabVIEW实时显示界面,进行了浆液两相流速度参数的实验验证。实验结果表明,设计的电容传感器能够准确地测量浆液的速度参数,为灌浆防灭火技术提供了实时可靠的反馈信号。这一创新技术的成功应用,将有力地保障灌浆防灭火技术在井下的安全有效实施。

As a major accident in coal mining,underground fire not only has a serious impact on coal mining,but also threatens the life safety of underground workers.Aiming at the problem of solid phase deposition or blockage in slurry in grouting fire prevention technology,capacitive sensors were used to accurately measure slurry speed parameters.Through simulation research,combined with the analysis of influencing factors and sensitivity of capacitive sensors,the structure and geometric dimensions of capacitive sensor suitable for coal mine environment were designed.The electrode width was selected as 35 mm and the electrode spacing was selected as 70 mm.At the same time,the capacitive sensor transmitter was designed,and the experimental verification of the speed parameters of slurry two-phase flow was carried out by combining the real-time display interface of LabVIEW.The experimental results show that the designed capacitive sensors can accurately measure the speed parameters of slurry and provide real-time and reliable feedback signals for grouting fire prevention and extinguishing technology.The successful application of this innovative technology will effectively ensure the safe and effective implementation of grouting fire prevention and extinguishing technology in underground.