山东煤炭科技2025，Vol.43Issue(5)：39-43,54,6.DOI:10.3969/j.issn.1005-2801.2025.05.008
超高压水力切割大倾角煤层顶板系统研究
Research on Roof System of Large Dip Angle Coal Seams with Ultra-high Pressure Hydraulic Cutting
文浩 1闫磊 2张宏东1
作者信息
- 1. 山西保利裕丰煤业有限公司,山西 临汾 042100
- 2. 渭南陕煤启辰科技有限公司,陕西 西安 710199
- 折叠
摘要
Abstract
In view of the problem that it is inappropriate to use shaped charge blasting to cut roof and relieve pressure in mines of Shanxi Baoli Yufeng Coal Mine,it is proposed to adopt dense drilling combined with ultra-high pressure hydraulic roof cutting technology.Adopting a double acting supercharger to optimize water cutting hosts,and realize the isolation of liquid suction and discharge pipelines,the fluid pressure is doubled through hydraulic balance,combined with an accumulator,the ultra-high pressure water is stably output,ensuring smooth and controllable cutting surfaces.The maximum cutting pressure reaches 300 MPa,solving the problem of poor stability of traditional water cutting hosts.The ground simulation test results show that increasing the cutting pressure from 100 MPa to 280 MPa will increase the cutting efficiency from 57 mm²/s to 150 mm²/s,with an increase of 163％.As the cutting depth and area increase,although the cutting efficiency decreases from 150 mm²/s to 83 mm²/s,the decrease slows down,which is beneficial for continuous cutting operations under higher cutting pressures.The development of this system can provide technical support for on-site downhole roof cutting and pressure relief construction.关键词
超高压/水力/切顶Key words
ultra-high pressure/hydraulic/roof cutting分类
矿山工程引用本文复制引用
文浩,闫磊,张宏东..超高压水力切割大倾角煤层顶板系统研究[J].山东煤炭科技,2025,43(5):39-43,54,6.
