Rock Mass Basic Quality And Blastability

Perforation of mining engineering blasting is the production procedure. The stand or fall of genesis of blasting effect with subsequent shovels, transportation and crushing efficiency are closely related. Strictly controlling blasting ore-rock fragmental, give the follow-up mining equipment providing appropriate blasting block degrees, can greatly improve the shovels, transportation and crushing efficiency, reduce secondary crushing workload. Rational blasting parameters design is to realize the control of the rate of blasting ore-rock key, but want to make reasonable blasting parameters design have to the degree of difficulty genesis of blasting explosive sex can be fully aware, and on this basis to rock blasting sexual conduct grading.Domestic authoritative can still stay in blasting sex classification of pull with the SUS 'classification and grading rely only on sturdiness coefficients as rock blasting difficulty index appear relatively coarse, thus puts forward to the classification standard of engineering rock mass, the rock quality indicators to can explode sex grading.This paper first collects the domestic and foreign material, lists the main factors that influence blasting effect at home and abroad, through the statistics of grading methods that rock mass index, integrity, uniaxial compressive strength, saturated rock density is rock blasting sex can be used in the most graded index.At home and abroad, the actual engineering example, collect blasting saturated uniaxial compressive strength Rc, rock body completeness index Kv, rock density with explosives consumption q relationship of data. Based on the classification standard of engineering rock mass, the BQ formula of by the least squares method BQ formula is revised, draw a new calculation formula. For a new calculation formula for engineering inspection, found a new calculation formula precise.According to the revised rock quality index formula, combining the engineering data collected in rock blasting sexual conduct grading.