Rock cross-cut coal uncovering high-pressure water jet flow reaming pressure relieving and outburst prevention effect evaluation method

The invention provides a rock cross-cut coal uncovering high-pressure water jet flow reaming pressure relieving and outburst prevention effect evaluation method, which comprises the following steps that: drill holes are uniformly arranged in a coal uncovering region in an outburst prevention measure control range; the reaming uniformity and the drilling cutting discharging rate are obtained; and the evaluation on the high-pressure water jet flow reaming pressure relieving effect and the coal mine gas outburst prevention effect is realized according to a result of whether the reaming uniformity is in a preset range or not and whether the drilling cutting discharging rate exceeds the preset threshold or not. The method is simple; the operation is easy; the adaptability is high; the problem of great errors or index measuring incapability due to dense drill holes in the coal uncovering region is avoided; and the accuracy degree of a measured value is ensured.