针对煤矿开采中小构造薄弱带严重威胁煤矿安全生产的问题,以某矿保护煤柱探测试验为例,基于中煤科工集团重庆研究院自主研发的大透距无线电波坑道透视仪,对探测频率进行了专项试验研究.研究表明,0.3 MHz、0.5 MHz的发射频率均可满足宽度300 m以上工作面的透视探测要求,但高的信号频率有利于提高探测精度,故生产过程中,可选用0.5 MHz的发射频率开展大透距坑透探测工作.%Aimed at the serious threat caused by weak structure and the small structure in coal mining,taking a test of protective coal pillar in a mine as an example,based on large penetration distance wave tunnel perspective instrument which is developed by Chongqing Research Institute Co.,Ltd.of CCTEG,a special experiment was carried out on the study on detection frequency.Research shows that,the detection frequency by 0.3 MHz,0.5 MHz can meet the requirements of working face whose width more than 300 meters,but the signal with high frequency can improve the detection accuracy,so in the production process,the detect frequency of 0.5 MHz can be used to carry out the detection of the large penetration distance.
展开▼
