“sublevel caving”造句，怎麼用sublevel caving造句

5、Increasing of ore recovery rate and decreasing of ore loss & dilution rate in the case of pillarless sublevel caving

7、Research shows that main cause of ore dilution in sublevel caving mining is tlnrational cut-off grade drawing. Non-dilution ore drawing is most ideal drawing mede.

9、Disadvantages of sublevel caving without sill pillar lie in high ore loss and dilution as well as difficult control of ore loss and dilution.

11、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.

2、Development of CAD system for sublevel caving method without sill pillar based on ObjectARX

4、The stoping scheme of sublevel caving and continuous mining was optimized, and optimization design of driving work was carried out.

8、Research of fully-mechanized sublevel caving technology in structural complex thick seam face with output of 2 million tons per year

1、Mechanism of capping rock collapse by no-pillar sublevel caving

6、With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining.

3、Improved way of sublevel caving without sill pillar of Chambish main orebody

10、It adopt dry filling method in the orebody above -350m level and adopt the method of sublevel caving in the orebody under the level. Exploitation engineering already reach -385m level.