A DOFS-Based Approach to Calculate the Height of Water-Flowing Fractured Zone in Overlying Strata under Mining

Table 2

Test parameters of the OSI-C-S OFDR instrument.

Name	Test length	Number of test channels	Spatial resolution	Sampling rate	Strain test range	Strain test accuracy	Temperature range
Option	Up to 100 m	4	1 mm or 1 cm	4 hz as the fastest	±12000 με	±1.0 με	-200°C~1200°C