Study on the Distribution Law of Coal Seam Gas and Hydrogen Sulfide Affected by Abandoned Oil Wells

This paper is devoted to solving the problem of how comprehensively control coal seam gas and hydrogen sulfide in mining face, distributed from abandoned oil wells resource areas. The Ma tan 30 31 No. I0104105 working face Shuang Coal Mine were taken as examples. Through parameter testing, composition analysis, field investigation at source distribution, influence range affected studied. results show that coal-bearing strata belong coal–oil coexistence strata, emission H2S local area mainly by closed wells. Within wells, along direction concentration CH4 borehole increases you move closer center, two sides well a decreasing trend. In well, distribution desorption content center distance presents trend power function, particularly well. higher H2S, lower when moves further away radius on over 300 m. provide theoretical basis for understanding law enrichment design treatment measures within