The sectional cutting method is effectively applied to longhole raising but less applied to tunnel heading. 分段掏槽法已在深孔爆破掘进天井运用中取得一定效果，而在平巷掘进中运用却未予以足够的重视和研究。
With increasing enlargement of roadheader's application, people put forward more request to its cutting ability. 随着掘进机使用范围的日益增大，对其截割能力的要求也不断提高。
