Investigation of a Self-Excited Pulsed Water Jet Slotting for Coal Roadway Driving
- https://doi.org/10.2991/ameii-16.2016.96How to use a DOI?
- pulsed water jet, hydraulic slotting seam, FLAC3D, coal roadway driving, outburst prevention
Advance borehole is commonly used to prevent outburst in driving working face, while the influence scope of drilling is limited in deep mining, resulting in large drilling construction and taking very long construction time. A slotting technology by using self-excited oscillation pulsed water jets is proposed to solve this problem. Pulsed jet slotting can improve the pressure relief scope of borehole and increase the permeability of coal seam and gas desorption rate, which will shorten the period of gas excavation and driving roadway. This work use FLAC3D to research the influence of pressure relief by pulsed water jet slotting on the distribution of coal stress, and the influence scope is acquired combine field experiment. Since the pressure relief radius is enough to cover adjacent borehole, cross slotting arrangement is proposed to reduce slotting construction. Application at Pingdingshan No.5 coal mine shows that the pressure relief radius of one borehole after slotted can be more than 2.5m in coal seam. The total gas drainage amount of driving working face was increased by 3.37 times, which would provide safety guarantee for rapid driving in coal seam. The monthly driving rate of coal roadway was improved by one time.
- © 2016, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Jianguo Zhang AU - Jinjing Zhang AU - Zhe Zhou PY - 2016/04 DA - 2016/04 TI - Investigation of a Self-Excited Pulsed Water Jet Slotting for Coal Roadway Driving BT - Proceedings of the 2nd International Conference on Advances in Mechanical Engineering and Industrial Informatics (AMEII 2016) PB - Atlantis Press SP - 475 EP - 481 SN - 2352-5401 UR - https://doi.org/10.2991/ameii-16.2016.96 DO - https://doi.org/10.2991/ameii-16.2016.96 ID - Zhang2016/04 ER -