Coal mine tunnel top bottom plate deformation measurement device

The utility model relates to a coal mine tunnel safety monitoring field, concretely relates to top bottom plate deformation measurement device who is applied to coal mine tunnel. Measuring device include: base and measuring mechanism, the measuring mechanism include: stand, the steel ruler box body, the base is connected with stand detachably, the steel ruler box body detachably set up on the stand, the internal steel ruler that is provided with of steel ruler box, the steel ruler stretches out to serve and still is provided with magnet. Through implementing the utility model discloses the error that the sopwith staff supported tight degree in the time of can avoiding measuring because of the gradation difference leads to makes measuring error remain stable, go up direct reading, convenient and fast from the chi body, the ruler box body is rolled up in the retraction of the chi body around measuring, and installation, portable are easily disassembled to each part of device, through embedding the device's stan