Cause Analysis on Inconsistent Measuring Data with Two Gas Detectors at Upper Corner Angle in Pangpangta Coal Mine
LI Yan
GUO Shousong
Abstract：The gas concentration values which were respectively measured by the portable gas detection alarm and the optical gas detector in 10-702 working face of Pangpangta Coal Mine were inconsistent, with the value difference of nearly 1%. Through the comparison of two gas detectors’ principle, the field tests and the analysis of gas samples in the laboratory, the influence of the detector itself, underground environment factors and other gas components on the measuring values was ruled out, and it came to the conclusion that the cause of inconsistent measuring values by two gas detectors was due to the low oxygen concentration at the upper corner angle of the face, which led to the measuring values by the optical gas detector on the high side. For this purpose, the modified formula for the measuring values by the optical gas detector was proposed so as to solve the similar problems on the site.
Keywords：gas at upper corner angleportable gas detection alarmoptical gas detectormeasuring erroroxygen concentration
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 57-59,62 )