摘要
为了研究微波辐射深井砂岩升温损伤特征与钻进效果,采用恒源煤业标高-940 m回风辅助石门取芯的深井砂岩为研究对象,分析其深井砂岩在相同输入能量微波辐射后温度、质量、纵波波速及钻进实验后的机械钻平均转速、扭矩随不同路径处理下的变化规律。研究结果表明:在模拟试件单面辐射时,高功率短时间(1.4 kW,214 s)比低功率长时间(1.0 kW,300 s)微波辐射后质量变化、试件前侧后表面最高温度变化更大,且波速差值和损伤因子随试件表面温度升高而增大;微波辐射前后测量试件对应5个标记点位置处的纵波波速,发现波速差值和损伤因子较大的地方主要集中在试件表面升温最高的地方;在对比有无受限变形条件下钻进实验效果分析开展了A组微波未辐射、有受限变形(路径1),B组微波功率为1.0 kW、微波辐射时间为300 s、有受限变形(路径2),C组微波功率为1.0 kW、微波辐射时间为300 s、无受限变形(路径3),D组微波功率为1.4 kW、微波辐射时间为214 s、有受限变形(路径4)4种路径的处理方式,得到钻进效果从优到差的路径依次为:路径3>路径4>路径2>路径1;分析得到在相同输入能量有受限变形条件制约下,功率在1.4 kW微波辐射下钻进效率是功率在1.0 kW微波辐射下的1.3倍左右,而有受限变形条件制约下,微波辅助钻进法的效率是无微波辐射常规法的8.5倍左右,即有受限变形条件制约下机械钻进较为困难。研究成果为较弱吸波能力深井砂岩的损伤路径优化及低能耗高效率破岩提供了借鉴与参考。
In order to study the heating damage characteristics and drilling effect of deep-well sandstone radiated by microwave radiation,deep-well sandstone with-940 m return air assisted Shimen coring from Hengyuan coal industry is used as the research object to analyze the changes of temperature,mass,longitudinal wave velocity of deep-well sandstone under the same input energy microwave radiation,and the average speed and torque of mechanical drill after drilling experiment with different path processing.The results show that the mass change and the maximum surface temperature of the test specimen after microwave irradiation with high power for a short time(1.4 kW,214 s)is greater than that after microwave irradiation with low power for a long time(1.0 kW,300 s),and the wave velocity difference and damage factor increase with the increase of the surface temperature of the test specimen.The longitudinal wave velocity at 5 marked points was measured before and after microwave irradiation,and it was found that the large difference of wave velocity and damage factor were mainly concentrated in the place with the highest temperature rise on the specimen surface.The drilling experiment results were analyzed under the conditions of comparison with or without limited deformation.Group A had no microwave radiation and limited deformation(path 1),group B had microwave power of 1.0 kW and microwave radiation time of 300 s,Group C had microwave power of 1.0 kW and microwave radiation time of 300 s,and Group B had limited deformation(path 2)and microwave power of 1.0 kW and microwave radiation time of 300 s.No limited deformation(path 3),group D microwave power is 1.4 kW,microwave radiation time is 214 s,there are four path processing methods limited deformation(path 4),the drilling effect from the best to the worst path is as follows:Path 3>Path 4>Path 2>Path 1,the analysis shows that under the same input energy with limited deformation condition,the drilling efficiency under 1.4 kW microwave radiation is about 1.3 times that under 1.0 kW microwave radiation,and under limited deformation condition,The efficiency of the microwave-assisted drilling method is about 8.5 times that of the conventional method without microwave radiation,that is,it is difficult to drill under limited deformation conditions.The research results provide a reference for the optimization of damage path and rock breaking with low energy consumption and high efficiency.
作者
陈登红
鲁德沛
王智鹏
汪朝家
杨理想
汤允迎
CHEN Denghong;LU Depei;WANG Zhipeng;WANG Chaojia;YANG Lixiang;TANG Yunying(School of Mining Engineering,Anhui University of Science and Technology,Huainan 232001,China;State Key Laboratory for Safe Mining of Deep Coal Resources and Environment Protection,Huainan 232001,China;Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,Chin)
出处
《金属矿山》
CAS
北大核心
2024年第6期94-104,共11页
Metal Mine
基金
省级研究生专业学位教学案例库(编号:2022zyxwjxalk087)
省级研究生联合培养示范基地(编号:2022lhpysfjd037)
智能采矿工程新建专业质量提升项目(编号:2022xjzlts008)。
关键词
微波辐射
深井砂岩
侧压受限变形
钻进效果
路径优化
microwave radiation
deep well sandstone
lateral compression limited deformation
drilling effect
path optimization
作者简介
陈登红(1986-),男,教授,博士,博士研究生导师。
