COAL ENGINEERING ›› 2017, Vol. 49 ›› Issue (5): 8-10.doi: 10.11799/ce201705003

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Single coal bedding borehole gas radius dynamic determination method

  

  • Received:2016-11-08 Revised:2016-12-21 Online:2017-05-09 Published:2017-07-25

Abstract: In order to more convenient to determine coal seam gas drainage radius, gas extraction rule of basic assumptions in the same geological unit consistent condition, proposed the use of gas quantity and gas drainage with each section drilling amount and extraction time conform to the quadratic equation of superposition function relationship, get in any gas content area of the geological unit of gas drainage radius, gas extraction radius of dynamic measurement, the method in the determination of 3207 company return air along the trough results close to radius of pressure drop method extraction result, the result is good.

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