COAL ENGINEERING ›› 2017, Vol. 49 ›› Issue (3): 122-15.doi: 10.11799/ce201703035

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Design and application of Multi Point Roof Separation Indicator

  

  • Received:2016-02-27 Revised:2016-06-08 Online:2017-03-09 Published:2017-03-21

Abstract: The coal mine roadway roof separation is a separate internal structure of rock, monitoring of roof subsidence is an important content of mine pressure monitoring. Aiming at the problem of roof subsidence, it is proposed that the separation distance convert into the big displacement sensor. To derive the relationship between the displacement and the semaphore ,and design the multi point roof separation indicator. It was applied to Maying Mine of Zhongmei Coal Group.With the analysis on the data obtained,the roof separation conditions of the roof in the air retuning gateway of No.9103 coal mining were in detail accurately mastered. The minimum roof separation can be measured is 0.19mm. It could provide important technical support to the roof classification and the optimization plan of the gateway support.

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