Research Progress on Determination Method of Hydrogen Sulfide Content in Underground Coal Seam

The content of hydrogen sulfide in coal seam is the foundation of harmful gas treatment in mine. Especially in the process of coal seam gas drainage, there is a high degree of dependence between the content of hydrogen sulfide and the extraction process. The lack of cognition of hydrogen sulfide concentration field under different space-time scales often leads to the one-sided evaluation of the threat degree of hydrogen sulfide disaster, so the determination of hydrogen sulfide content in coal seam in coalmine is of great theoretical and practical significance to clarify the law of harmful gas distribution. This paper systematically reviews the determination methods of hydrogen sulfide content in coal seam of coalmine, points out the applicable conditions, advantages and disadvantages, shows suitable technologies for hydrogen sulphide gas sensing and detection, equipment and characteristics of hydrogen sulphide gas adsorbed by coal, and clarifies the flow laws of hydrogen sulfide gas of multi-component gas under different water content conditions, and studies the sampling method of “fidelity” in coal mine. The construction of hydrogen sulfide concentration field under different temporal and spatial scales will become a research hotspot in the future.