Abstract: Aiming at the problems of unstable surrounding rock, large road repair works and lagging gas management caused by the influence of mining on the bottom pumping lane in Niumasi Mine, this paper determines the depth of damage to the bottom plate of inclined coal seam through theoretical calculations and numerical simulations, and ultimately determines the reasonable location of the bottom pumping lane by utilizing the spatial geometric relationship of the drilling construction. The study shows that after mining the coal seam, the main controlling factors for the destruction of the rock body at a certain point G of the bottom plate are the inclination angle of the coal seam, the original rock stress, the stress concentration coefficient, internal friction angle, the compressive strength, the length of the horizontal three-zone stress distribution of the bottom plate of the quarry and the projection distance along the tendency of the coal seam. The numerical simulation results for the distribution of the stress along the tendency of the seam and the direction of the stress distribution are in line with the characteristics of the horizontal three-zone stress distribution, and the values of the main controlling factors are replaced by the damage criteria of the bottom plate to determine the depth of destruction of the bottom plate at the middle of the mining area in the vertical zone. It is determined that the maximum longitudinal damage limit of the bottom plate in the middle of the mining area is 11.8 m, and the bottom pumping lane is in a relatively stable state when the bottom pumping lane is arranged below the maximum damage depth of the bottom plate of the coal seam of 11.8 m. According to the contour map of the damage limit of the bottom plate and the cloud map of the bottom plate plastic zone, it can be seen that the bottom plate of the inclined coal seam mining field is dominate by the shear damage, and the scope of the damage limit and plastic zone increases in turn from the middle of the mining area to both gangs of the face, both of which are shallow on both sides, and the damage limit and plastic zone increase in the same direction. The damage limit and plasticity zone range from the middle of the mining hollow area to the two gangs of the working face in order of increasing, all of them are in the form of shallow sides and deep center. On the basis of determining the maximum damage depth of the bottom plate, the calculation of spatial geometric relationship of the drill boles show that he construction volume of the drill holes is the least when the level distance between the bottom pumping lane and the return airway is 2.3 m. Finally, it is concluded that it is more reasonable to arrange the bottom pumping lane at the bottom plate of the coal seam below 11.8 m normal and the level distance between the bottom pumping lane and the return airway is 2.3 m, and the results of the research can provide reference for the selection of a reasonable position of the bottom pumping lane of the inclined coal seam.