Although a lot of research on the high-efficient exploitation field of vein gold deposits is carried out in the theoretical research of mining method and production practice of mines, the sublevel caving without sill pillar has been neglected at all times.

Experiments were conducted to investigate the effects of material strength and hole burden on the blast performance of fan-patterned holes in sublevel caving, and to analyze the factors affecting the effective area of blasting.

A computer-aided technical management for sublevel caving is established and its structural design, compositions and functions are introduced.

This paper describes the principles of computer stochastic simulation and the computer program used for simulating the process of ore drawing in Sublevel Caving.

Improvement of cutting technology for non-pillar sublevel caving;

The collusions reveal the elementary mechanism of capping rock collapse and the rules of ground subsidence during the caving process by non-pillar sublevel caving.

Application of no sill pillar and high-sublevel caving in weak orebody mining;

Study on Reasonable Cut-off Grade for Ore Drawing in Sublevel Caving Method;

A case study on sublevel caving method shows how the 3D Studio Max and the Photoshop 6.

According to underground pressure problem and hard extraction of sublevel caving method, primary work done is set forth as follows:Firstly, according to the results of systematical engineering geological survey, Q system which is well applicable to the conditions of high stress field and RMR method are applied to rock engineering classification.