Study on pattern of gas emission at fully-mechanized coal face in Mabu coal mine

Aimed at the seam gas characteristics and mining condition of the 8204 fully-mechanized coal face in Mabu Coal Mine No.8 coalbed，measured results show that the average amount of gas emission at fully mechanized coal face production shift is 1.5 to 1.6 times the monthly maintenance classes and uneven gas emission coefficient is 1.40 to 1.55;at the same time,we found that face total amount of gas emission and goaf gas emission increases with the amount of air distribution and increases the amount of gas emission cut at the eye remained relatively stable characteristics. No.8 coal seam burial depth has changed greatly, and two more mining area tectonic features, research result of gas content gradient is 0.023 m³/t/m and tectonic gas emission has greater impact on the conclusions. No.8 coal mining face in the process should be combined with the impact of gas emission factors are targeted gas control.