Because of faults and ground water H2S gas of the coal seam of the east side of the dike is escaped in late stage, while the west side takes on H2S abnormity because of well capping conditions.

• 岩墙东侧因断层和地下水的作用，煤层中H2S气体后期遭逸散，西侧因封盖条件较好而呈现出H2S气体异常通。