落矿
3.The application of combined detonation technique of detonating fuse and tube in the technology of ore dropping out
4.The ground base of the newly added chute in 4＃ tailings reservoir at Dexing Copper Mine is characterised by thick weathered layer,loose structure,fractured zone and landslip mass accumulation.As a result,the ground has a great subsidence and inefficient carrying capacity.In view of this, the grouting technology was adopted to reinforce the chute ground base.The on-site testing shows that the subsidence of the chute has been efficiently controlled and the carrying capacity of the ground base improved so that the stability requirement has been met.
5.The blast of sublevel caving together with the blast of undercutting, crater opening and slot cutting are brought about successfully at same time in the practice of sublevel drilling and stope mining with nonelectric blast ignition system, and the productivity of mining is increased.
6.The influence of specific charge, hole arrangement, charge structure, stem length, millisecond interval and ignition mode on the yield of the blasted boulder is analyzed Some measures to lower boulder yield in deep hole blasting of underground mine are presented through the optimization of blasting operation parameters as follows: lowering deep hole blasting effect of geology structure, rationally determining specific charge, using technique of wide-space small burden blasting, technique of manifold charge structure and technique of millisecond compression blasting, strengthening the management of boring construction and blasting construction.
7.By systematic monitoring the stress-strain pattern of bottom drifts using JXH-2 concretestrain-wire gage, the stress-strain relation in slusher drifts was revealed, and it was foundthat there are two most dangerous periods of drift support during block caving mining,whichprovides a practical basis for ground control and monitoring in a block caving system.
10.The Application of Trench-continuously-advanced Caving Method for Unit Block
