基于光纤光栅传感技术的深井井壁结构监测

研究目的:井筒的安全是煤矿安全运营和高效生产的前提。实时掌握井壁结构受力状态,防止井壁突然性破坏造成重大损失,井筒的长期安全监测就显得尤为重要。在大涌水和复杂电磁环境条件下,光纤光栅传感器可靠性和稳定性好,通过采用光纤光栅传感技术对千米深立井井壁结构的长期监测,可以掌握深大涌水井筒的受力变化规律,为评价井筒的安全状况提供依据。研究结论:采用光纤光栅传感器对千米深立井井壁结构进行了一个完整周期的监测,得到了井筒表土段和基岩段井壁温度和应变变化规律。6月至10月间由温度引起的温度应变达到最大值,井筒更容易在夏季发生破裂灾害;光纤光栅传感技术在大淋水条件下深立井井壁结构监测中的应用,为井壁变形监测提供了一种新的、稳定可靠的技术方案,对复杂地层条件下井壁长期监测技术革新产生重要的推动作用,对于其他复杂地层中岩土工程监测具有重要的指导意义。

Monitoring of Deep Shaft Lining Structure Using the Fiber Bragg Grating Sensing Technology

Research purposes: The security of the shaft is the prerequisite for a coal mine to run safely and efficiently.Long-term security monitoring of shaft is particularly important to prevent its great loss caused by the sudden destruction and to know the stress state.Fiber bragg grating(FBG) sensors have better reliability and stability in the gushing water and complex electromagnetic environment conditions.The kilometer deep vertical shaft lining structure was monitored in long-term with FBG sensors.The shaft ...