摘要
水力压裂技术能够有效释放岩石内部的应力,从而降低矿压强度。以神东布尔台煤矿为研究背景,基于能量理论分析了水力压裂防治强矿压机理,通过数值模拟及现场应用研究了水力压裂技术对卸压护巷效果的影响。结果表明:通过水力压裂处理顶板模拟,发现顶板跨距、释放动能和总弹性能均显著减小,对煤体的冲击作用减弱。定向压裂过程分为压力急剧上升阶段、压力迅速下降阶段和压力趋于平稳阶段,分别对应裂缝萌生、裂缝扩展和贯通稳定过程。在裂隙区,假设采用钻头法监测煤体应力,该区域钻屑数量明显减少,说明顶板定向压裂可以显著减小支承压力。研究结果为水力压裂技术在矿山工程中的广泛应用奠定了基础,推动了矿山安全生产技术的进步。
Hydraulic fracturing technology can effectively release the stress inside the rock,thereby reducing the rock pressure strength.Based on the energy theory,the mechanism of hydraulic fracturing for preventing and controlling strong mine pressure was analyzed with the background of Shendong Bultai Coal Mine.The influence of hydraulic fracturing technology on the effectiveness of pressure relief and roadway protection was studied through numerical simulation and field application.The results showed that through hydraulic fracturing treatment of the roof simulation,it was found that the roof span,released kinetic energy,and total elastic energy were significantly reduced,and the impact on the coal body was weakened.The directional fracturing process is divided:a rapid increase in pressure stage,a rapid decrease in pressure stage,and a pressure stabilization stage,corresponding to the processes of crack initiation,crack propagation,and breakthrough stability,respectively.In the fracture zone,assuming the use of drill bit method to monitor coal stress,the number of drill cuttings in this area is significantly reduced,indicating that directional fracturing of the roof can significantly reduce the support pressure.The research results have laid the foundation for the widespread application of hydraulic fracturing technology in mining engineering and promoted the progress of mining safety production technology.
作者
郭争利
杨真
Guo Zhengli;Yang Zhen(Shendong Coal Group Bultai Coal Mine,Ejin Horo Banner Inner Mongolia 017209,China)
出处
《山西冶金》
2025年第1期204-206,共3页
Shanxi Metallurgy
关键词
强矿压
水力压裂
煤矿安全
防治技术
strong mining pressure
hydraulic fracturing
coal mine safety
prevention and control technology
