Method and device for controlled filling and inspection of blast holes

A method for measuring blasting boreholes, wherein the method comprises at least the following steps:

• providing a radar head having a base body at which a connection means for a pulling means is formed at an upper side and having at least one radar unit that is operated in a non-rock penetrating frequency range;
• arranging the radar head on the pulling means;
• introducing the radar head into a blasting borehole in that the radar head is lowered into the blasting borehole by gravity from an upper aperture opening of said blasting borehole in an arrangement on the pulling means;
• and
• detecting at least one measurement value comprising:
• a base distance of the radar head from a blasting borehole base and/or a charge level distance for determining the charge level of the explosive in the blasting borehole, and
• a shape of a jacket section over at least a portion of a depth of the blasting borehole by means of the operation of at least one of the radar units;
• wherein the radar head is moved from bottom to top or from top to bottom in a vertical axis between a lower blasting borehole base and the aperture opening of the blasting borehole during the detection of the at least one measurement value.