摘要
论述我国立井开凿综合注浆、深井冻结法、钻井法和普通法凿井等凿井技术现状及未来的开发展望。
The author of the paper has discussed the feasibility of the eddy flow detection method to detect rust and corrosion of mine metal equipment.When the exciting frequencies are same,the lifting curves of dif- ferent material samples are different.But in a certain area, the curves will closely be a straight line and each curve will have a similar inclination rate,As for the same material samples,when the exciting frequencies are different,the in- clination rate at the straight line section of the lifting curve will be different.The higher of the frequency,the smaller inclination rate will be.As for the same material samples, when the exciting frequencies are same,the more serious rust and corrosion,the smaller inclination rate at the straight line section of the lifting curves will be.As for a certain eddy flow probe,there is an optimum detection fre- quency range for the most sensitive of rust and corrosion. The test conditions used for this paper was 400～420 kHz.
出处
《煤炭科学技术》
CAS
北大核心
1997年第1期11-13,57,共4页
Coal Science and Technology
