In order to overcome the shortcomings of current approaches for predicting fragmentation size in blasting, the artificial neural network theory is utilized to establish an approach for predicting fragmentation size for scallop moderate longholes under the specific conditions of ores and rocks.

The industrial test results of stope leaching at a vein-group type uranium deposit of Ganzhou Uranium Mine are introduced, with focus on upward deep-hole sector blasting, leaching technique of ore heap, as well as the critical techniques and direction of the further research.

Study and application on the technique of bottom priming in medium-length hole blasting in Paishanlou gold mine;

Combining with the actuality of Paishanlou gold mine,the issue analyzed the safeguard mechanism to realize the mining capacity of 1 800t/d in the following aspects,the selection of construction teams,block mining,midsection haulage,stoping method and bottom priming technique.

The blasting mechanisms of collar priming and bottom priming are analyzed, also the advantages and disadvantages of two priming methods are compared.

Especially, the technique of detonating hole bottom and the experimental study of ore removal associating truck with scraping drifts are applied, the mining techniques in Shizhuyu.

Study of rockbreaking mechanism in the case of segmental blasting holes & hole-bottom detonation by means of dynamic hole-photoelastic method;