MEASURING TOOL OF SHOCK FORCE AND MEASURING METHOD FOR SHOCK FORCE TO DETERMINE BLASTING CONDITION

摘要

PURPOSE:To enable to obtain accurate shock value, with quick and simple work by not skilled personnel, by the shock force measuring tool with simple and small sized construction. CONSTITUTION:When the pressured surface 15 of the pressing lever 13 has a shock force 30, the pressured surface 16 depresses and deforms the steel ball 17 used as test piece. The steel ball 17 deformed in flat is picked up from the measuring tool 10 and the degree of deformation is measured, and the shock force 30 can accurately and easily be grasped by collating the measured value with the conversion table between the shock and degree of deformation made in advance. As the work of execution, the measuring too 10 is inserted into the charge hole 26 of the crushed object 25 such as rocks so that the pressure receiving surface 15 is toward the explosive compound 27, and damping is made with packing 28 for quick and simple work. Further, the chain 2 is used to pick up the measuring tool 10 from the charge hole 26.