Rational Location Determination of Mining Terminal Line for Coal Mining Face Under Special Geological Conditions

In order to solve the rational location determination of the mining terminal line for No.3206 coal mining face under the fold structure conditions in Xialong ma Mine, the paper simulated the stress distribution conditions of the air returning gateway when the mining terminal line of No.3206 coal mining face had a distance of 25, 20, 15 and 10 meters to the air returning gateway of No.3207 coal mining face.The surrounding rock deformation conditions were analyzed.The results showed that when the mining terminal line of No.3206 coal mining face had a distance of the 20 m to the air returning gateway of No.3207 coal mining face, the stress of the surroun ding rock was 6.212.6 MPa, the peak value of the support pressure reached minimum and the roof subsidence value of the gateway was controlled within 100 mm.The s afety mining of No.3206 coal mining face could be ensured and the lost of coal pillar could be reduced, thus the stability of air returning gateway in No.3207 coal mining face could be ensured.