| Issue |
E3S Web Conf.
Volume 233, 2021
2020 2nd International Academic Exchange Conference on Science and Technology Innovation (IAECST 2020)
|
|
|---|---|---|
| Article Number | 03017 | |
| Number of page(s) | 4 | |
| Section | HCCE2020-Hydraulic, Civil and Construction Engineering | |
| DOI | https://doi.org/10.1051/e3sconf/202123303017 | |
| Published online | 27 January 2021 | |
Selection and application of the minimum gas injection volume of air drilling with raise boring machine
1 Mine Construction Branch, China Coal Research Institute, Beijing 100013, China
2 Beijing China Coal Mine Engineering Company Limited, Beijing 100013, China
3 National Engineering Laboratory for Deep Shaft Construction Technology in Coal Mine, Beijing 100013, China
*a Corresponding author: hanbo.0427@163.com, Tel: 13683366710, Fax: 010-84263982
b 40238686@qq.com
c 920392086@qq.com
d 40568103@qq.com
Gas injection volume is the key parameter of air drilling with raise boring machine, and the determination of the minimum gas injection volume is one of the key technologies to improve the drilling speed and shorten the drilling period. Based on the characteristics of raise boring technology, the construction technique of raise boring with air as circulating medium is studied, and the double-channel structural characteristics of direct circulation system are discussed. On the basis of summarizing and analyzing the principle and characteristics of the calculation methods, the minimum gas injection volume required for rock carrying in the engineering of air drilling with raise boring machine is calculated by using the minimum velocity method. The research results provide a basis for the design of drilling parameters and are of great significance for expanding the application range of raise boring method and realizing the safe and rapid construction of shaft.
© The Authors, published by EDP Sciences 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.