通过分析发现顺层抽放钻孔在垂直方向的偏斜受多种因素的影响,虽然钻杆自身弯曲变形导致钻孔向下偏移,但钻头前方煤体力学模型以及钻孔内残留钻屑将导致钻孔轨迹向上偏移,综合表现为钻孔在垂直方向上偏移,在煤矿井下的现场实验和考察也验证了这一分析结果。 The analysis shows that vertical deviation of vertical borehole drainage is affected by many factors. Although the drill pipe itself is bent and deformed to cause the borehole to deviate downward, the coal body mechanical model in front of the drill bit and the residual drill cuttings in the borehole Will lead to the upward deviation of the drilling trajectory, the overall performance of the borehole offset in the vertical direction, the site in the coal mine experiments and investigations also verify the results of this analysis.