水力喷射自钻进多孔喷嘴打击力特性研究  

Study on striking force characteristics of hydraulic jet self-drilling multi-hole nozzle

作　　者：刘延保 雷真杰 陈坤 何立鹏 申凯 巴全斌 LIU Yanbao;LEI Zhenjie;CHEN Kun;HE Lipeng;SHEN Kai;BA Quanbin(State Key Laboratory of Coal Mine Disaster Prevention and Control,Chongqing 400037,China;CCTEG Chongqing Research Institute,Chongqing 400039,China;College of Security Science and Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;School of Resources and Safety Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]煤矿灾害防控全国重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400039 [3]重庆科技大学安全科学与工程学院,重庆401331 [4]重庆大学资源与安全学院,重庆400044

出　　处：《矿业安全与环保》2024年第4期49-55,共7页Mining Safety & Environmental Protection

基　　金：重庆市自然科学基金面上项目(cstc2021jcyj-msxmX0564)。

摘　　要：为了探讨水射流自钻进喷嘴射流旋转打击力特性,确定了喷嘴结构参数,建立了水射流旋转打击力测试系统,开展了在不同喷嘴直径、射流角度、旋转速度、射流靶距和射流压力条件下打击力试验,分析了打击力随各影响因素的变化规律。试验结果表明:打击力随喷嘴直径增大而增大,随射流角度增大而减小;在不同射流压力下,存在最佳旋转速度200 r/min,此时射流打击力为最大值;6 mm靶距附近为射流充分发展阶段,该区间射流打击力值最高;打击力与射流压力之间呈正相关关系,当压力超过30 MPa时打击力增长趋势明显降低。最后讨论了射流打击力最大值组合参数,为水射流自钻进破岩工作参数优选提供参考。In order to explore the characteristics of the jet rotation striking force of the self-drilling nozzle,the structural parameters of the nozzle were determined,and a water jet rotation striking force test system was established.The striking force test was carried out under different parameters,including nozzle diameters,jet angles,rotation speeds,jet target distances and jet pressures.The variation rule of the striking force with the influencing factors was analyzed.The results show that the striking force increases with the increase of nozzle diameter,but decreases with the increase of jet angle.Under different jet pressures,there is an optimal rotation speed of 200 r/min to maximize the jet striking force.Near the 6 mm target distance,the jet is fully developed,and the jet strike force is the highest in this interval.The striking force is positively correlated with the increase of jet pressure.When the pressure exceeds 30 MPa,the growth trend of striking force is obviously reduced.Finally,the combined parameters of the maximum jet striking force are discussed.This study provides a reference for the optimization of the working parameters of water jet self-drilling rock breaking.

关 键 词：煤层增透 水射流 多孔喷嘴 射流旋转 打击力 

分 类 号：TD712.63[矿业工程—矿井通风与安全]