论文部分内容阅读
井巷掘进中,当岩性和耗药量等其他条件不变时,爆破效率的高低,主要取决于炮眼排列。炮眼排列是否合理,表现在自由面与最小抵抗线之间的相互关系上。若把两炮眼的中心连线这一边作为自由面的宽度,把沿炮眼轴线方向这一边(即炮眼深度方向)作为自由面的长度,则自由面面积的大小等于自由面的长乘以宽。由于工作面上的炮眼
In tunneling, when other conditions such as lithology and consumption are constant, the blasting efficiency depends mainly on the arrangement of the bores. Whether the arrangement of the borehole is reasonable is reflected in the relationship between the free surface and the line of least resistance. If the two sides of the central line of the two holes as the width of the free surface, along the borehole axis direction (ie, the depth of the hole) as the length of the free surface, the free surface area is equal to the size of the free surface of the long by the width. Due to the hole in the face