Open AccessImprovement and application of drilling and blasting techniques of anchor net (cable) spraying in rock roadways
Author(s) -
Zhongyi Wen
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/570/5/052008
Subject(s) - rock blasting , drilling , mining engineering , deformation (meteorology) , cracking , reinforcement , geotechnical engineering , engineering , geology , structural engineering , mechanical engineering , materials science , oceanography , composite material
To overcome the shortcomings of the prior art of bolting net (cable) spraying technology in rock tunnels of mine engineering, based on the principle of the combined action of surrounding rock and support, improvement methods and technical requirements are formulated. Through roadway section optimization and support parameter design and improvement of technology, smooth blasting, initial shotcreting, and construction quality of the anchor net (cable) as well as controlled release of the surrounding rock stress and local reinforcement are improved, so that the surrounding rock and support can be carried out together. Finally, through thin shotcreting, the coupling effects of the anchor net (cable), shotcreting layer, and surrounding rock can be realized, and the bearing performance can be brought into play to achieve the best support effect and ensure that the net section meets the requirements with minimal investment. The test shows that the improved technology can effectively solve problems of large area cracking and convergence deformation; the effect is positive and highly recognized by the industry, and it has been popularized and applied in this area and brother units. Large economic and social benefits have also been obtained.