Affiliation of Author(s):  土木与资源工程学院

Teaching and Research Group:  0201

Journal:  The 5th International Symposium on In-situ Rock Stress

Funded by:  主管部门科技项目

Abstract:  Space structures and scales of mined-out area are dynamic change with high-sublevel fully-mechanized caving in steep and thick coal seam. In weakening and disturbance of segment pre-blasting, the degree of coal damage and crack would be increased, and the complexity of physical-geometric structure and spatio-temporal evolution of mined-out area would be intensified. Firstly, the complexity of geological environment and mining technology, blasting parameters and technology optimization, and blasting effect of B1+2 steep seam of Weihuliang coal mine were analyzed comprehensively. Then, the pre-splitting blasting was applied successfully in 52 m sublevel top-coal caving and weak the coal effectively. Finally, the blasting effect was detected in broken zone with RSM-SY5 acoustic detector and YS(B) borehole optic camera, and the front and behind support forces were monitored before and after blasting. The results showed that blasting effect was obviously, and which provided technological reference for the subsequent safe mining of 102 m and 18 m sublevel top-coal caving.

First Author:  苗胜军

Page Number:  2

Number of Words:  2

Translation or Not:  no