基于光纤传感技术的顶板覆岩破坏规律探测研究

Roof overburden failure law detection based on optical fiber sensing

长壁工作面特厚煤层通常采用综采放顶煤工艺,其采煤过程对煤层顶板上方岩层破坏严重,会产生变形、破坏和断裂。通过在工作面地面钻孔植入方式布置一套光纤传感探测系统,采动条件下探测煤层开采后上覆岩层破坏的规律。研究结果表明:光纤传感技术能够实现对上覆岩层破坏的动态探查,唐家会矿61201工作面采动超前影响50~75m,煤层顶板上方垮落带高度为113.9m,导水裂隙带高度为213.9m。

Long wall working face usually adopts fully mechanized caving technology,which severely damages the rock formation above the coal roof,causing deformation,destruction and fracture.By arranging a set of optical fiber sensing detection system in the ground drilling and of the working face,the law of overburden failure after coal mining can be detected under mining conditions.The research results show that the optical fiber sensing technology can realize the dynamic detection of the overlying strata damage.The 61201 working face mining in Tangjiahui Mine has an advance mining influence of 50~75 m,the height of the caving zone above the coal roof is 113.9 m,and the height of the water conducting fissure zone is 213.9 m.