Abstract: In the past ten years，there are about thousands of roof accident resulting in deaths at domestic coal mine，nearly half of the total coal mine accidents.Therefore，real-time monitoring on the displacement and pressure of coal mine roadway roof separation and judging the stability of roof separation and surrounding rock to take effective protection measures in time play an important realistic meaning for prevention from roof accidents.With the use of Wireless Sensor Network and LabVIEW monitoring procedures consisting of sensors，distributed measurement nodes and wireless gateways from the roof separation monitoring system of coal mine roadway based on virtual instrument，the functions of data acquisition，storage，pre-warming，and query for the stress of roadway roof and the displacement were realized and the purposes of real-time and dynamic monitoring were achieved.Through the analysis of monitoring data，the current status of roof separation structure is reflected so as to timely make correct assessment on safety and stability of the tunnel.Early detecting the area which may occur roof caving，and promptly taking appropriate measures to avoid the occurrence of roof accidents at roadway can reduce property loss and casualties.

Key words: Coal mine roadway, LabVIEW, Roof separation, Wireless sensor networks, Data acquisition