摘要
针对山西保利裕丰煤业矿井因不宜采用聚能爆破切顶卸压的问题,提出采用密集钻孔结合超高压水力切顶技术。采用双作用增压器优化水切割主机,实现吸排液管路隔离,通过液力平衡倍增流体压力,结合储能器使超高压水稳定输出,保证切割面平整可控,最大切割压力达300 MPa,解决了传统水切割主机稳定性差的问题。地面模拟试验结果显示,将切割压力由100 MPa提高到280 MPa,会使切割效率从57 mm^(2)/s增加至150 mm^(2)/s,增幅达163%;随切割深度和面积增加,切割效率虽由150 mm^(2)/s降至83 mm^(2)/s,降幅趋缓,在更高的切割压力下有利于持续进行切割作业。该系统的研发可为现场井下切顶卸压施工提供技术支撑。
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 mm^(2)/s to 150 mm^(2)/s,with an increase of 163%.As the cutting depth and area increase,although the cutting efficiency decreases from 150 mm^(2)/s to 83 mm^(2)/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.
作者
文浩
闫磊
张宏东
Wen Hao;Yan Lei;Zhang Hongdong(Shanxi Baoli Yufeng Coal Industry Co.,Ltd.,Linfen 042100,China;Weinan Shanmei Qichen Science and Technology Co.,Ltd.,Xi'an 710199,China)
出处
《山东煤炭科技》
2025年第5期39-43,54,共6页
Shandong Coal Science and Technology
关键词
超高压
水力
切顶
ultra-high pressure
hydraulic
roof cutting
作者简介
文浩(1996-),男,山西临汾人,2018年毕业于吕梁学院采矿工程专业,本科,助理工程师,研究方向:采矿工程。
