Abstract:

Abstract: According to the principle of inclinometer and the special movement law of overburden rock under mining, the paper analyzed the limitation of conventional inclinometer applied to monitoring level displacement deformation in mining engineering. Based on conventional inclinometer, a new type of monitoring instrument- none wheel probe inclinometer was invented, which solves the problem of probe getting jammed in the hole when monitoring. Take the settlement hole around 7267 working face in Yaoqiao Coal Mine, for instance. Through analysis of the data measured by none-wheel probe inclinometer in different hole, the result shows the data is stable and could well reflect the variation law of formation; through T-test and fitting analysis of a same hole data, the result shows there is no significant difference between the data and change trend of two horizontal displacement curves is in welded joints, which ensures the reliability of the data in deep formation. The results showed that double-probe inclinometer could adapt to the condition of overburden rock, moving obviously and being deep, the data measured by which being accurate and reflecting the variation feature of formation in unconsolidated layers combing with the related geological data.

Key words: inclinometer, level displacement deformation, fitting analysis