掘进爆破过程中巷道顶板离层位移的光纤监测  

Displacement of roof abscission layer fiber monitoring during the excavation blasting process

作　　者：王宽[1] 倪建明[2] 陈贵[3] 刘文革 田驰 李川[1] 

机构地区：[1]昆明理工大学信息工程与自动化学院,昆明650500 [2]淮北矿业股份有限公司,安徽淮北235000 [3]淮北矿业股份有限公司朱仙庄煤矿,安徽宿州234111 [4]广东罗尔科技有限公司,广东东莞523120

出　　处：《光学技术》2015年第1期64-67,共4页Optical Technique

基　　金：国家自然科学基金项目(KKGD201203004);云南省应用基础研究计划项目(2013FZ021)

摘　　要：掌握顶板离层的状态,对及时采取相应的措施阻止顶板失稳,避免突发性破坏具有重要意义。基于拉伸弹簧和悬臂梁组成的复合结构,煤矿发生顶板离层时,传动杆带动弹簧发生形变,弹簧拉动自由端的等强度悬臂梁发生挠度变化,粘贴于等强度悬臂梁上的光栅发生波长移位,实现对煤矿离层的测量。在试点处安装了四只光纤Bragg光栅位移传感器,分别位于煤矿巷道顶部,每个监测点间隔2m,监测结果表明:在监测的一段时间内四只传感器共出现三次数据突变。在2013年1月21日-2013年1月22日的监测时间内发生爆破施工,爆破对巷道围岩产生扰动作用,引起传感器在发生爆破时出现数据突变,监测的传感器表明,最大位移变化量分别为4.04mm,1.67mm,2.77mm。能实时反映爆破掘进对煤矿巷道顶板离层的变化趋势。It is great significance to grasp the state of roof separation and take corresponding measures to make the roof separation stable to avoid sudden destruction. When coal mine roof separation occurs,the transmission rod pulls the free end of the equal strength cantilever beam by a spring,which makes the deflection change. The wavelength of the fiber Bragg grating is shifted which paste on the constant strength cantilever beam,realizing the measurement of abscission layer of coal mine. Four FBG displacement sensors are installed in test points,which located in the top of coal mine roadway. The interval of two monitoring points is 2m. Monitoring results show that during a period of time monitoring the four sensors have three data mutation. From January21,2013 to January 22,2013,the sensor data mutation in the case of blasting is caused by disturbance action on the surrounding rock of roadway. Monitoring of the sensors shows that the maximal displacement variation are 4. 04 mm,1. 67 mm and 2. 77 mm,respectively. The change trend of coal roadway roof separation can be reflected real-time.

关 键 词：顶板离层 位移 光纤光栅 巷道顶板 差动式测量 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]