??????????????? ??o?o?TDR????μ??????ˉ???è?a????′?è???3?é??????′?è??é???o|?μ?é??-??-?????????114??? ???
|??? >> ??-???????? >> ??????????? >> ??????????? >> ?-????
??o?o?TDR????????????????a????'????3???????'??????o|?????
2018-09-20
???????????TDR???????????o??????1????????,????-??????????????-??1?????-???1????????????????1???????????o?????????????????????????a????'????3???????'??????o|???????-??????????a?????????????????????????o????????????o|???????o|????-????????-????????????????????????????????????o???????????TDR??????o????????????????o??-??????????????o???????1???????o?TDR????????a????'????3??'??????o|???????-?????????????

????

???????????????????????????????3?????a????'????3??????????????????????-????????????'???????1??????????????o?????o??o???????????????????|?????????????o|???????????????????'????????????-??a????1??'??????????????o?'????????|????????2??a?????????'?'??????????????????o?????o????2????3??????1???????oo??????????????o?????????o?????????????????-?????|????????a????'????3????????????-????'??????o|?????o?????????????????????-???????????????????

1 TDR???????|??

TDR??a?????????????????????????????????o??????1?????????????????????????????????-??1?????-???1?????????????????????????????1?????TDR???????????????????o????????2????????????????????????'??-?????o?o?TDR?????????????????????????????o??????????a???????????????o?????????????????????????a????'????3??'??????o|???????-???

??????????????????2???-???-??????????'?????????????o????-???-???????????TDR???????a?????????1???????????????????-???1?????????????????????-??1??'?????o?????????????????'??????????2????????????????????-?????????????-??????????????????????o??????-???????'???????o?????a??????????????????????????????'????????1??????????????????????????3????????o??????????????o?????????????????????????1????????o?TDR?3?????1???-?????????1?3???????????????????????????????????a???o?????????a???????????????TDR?3??????????????3?3???????????'??????????????????????????????????????

2 ???a????????

???????????TDR????????????????????CAMPBELL?????????????TDR???????-??3?????????????????|?????????????????aTDR100??????????????CR1000???????????SDMX50?-????????????|????PCTDR???LOGERNET???

???1  TDR????????a

Fig.1 TDR monitoring instrument

???a???????TDR???????????|??????????1???????-TDR?????|???????????????'?o??????????o|???2??????????'?o??????????????-????????????????'?????????-???????'?o???????????????????o????????????????????????|???????????-????-????????????|??????????'?o????????????????????????????3??????????3?????????????????????????o????????????o|???????????????|??????????o|??1????'?o???????o|????????????????????????????|????2???3???4????????-??????????2?o????????????o?????????????????1?????????????3???????

QQ??a???20150529102455.pngQQ??a???20150529102606.pngQQ??a???20150529102536.png

???a???????1???????      ???b?????-???????        ???c??????????????

???2 ????????a???????3????

Fig.2 Test waveform of bending test

QQ??a???20150529104153.png     QQ??a???20150529104256.png

???a???????????'???????-???????????????????-???     ???b????????'????a??-

???3 ????'?o??????????????????????????????????3????

Fig.3 The test waveforms of coaxial cable shielding under different conditions

???4 ??????????o|???????'?o????TDR???????2?o?

Fig.4 TDR measurement curve of coaxial cable at different temperatures

    ??????2??-???????????o?????????'?o?????????????????????????????????????3??????????o????????????o???????a??????????3??3????'????o?TDR????????????????????'?o??????????o|?????????2??-???????????o?????????'?o????????????????o??????????????????????????????-????????????????-????????????????'????a??-???????3???????????????????????????????-??????TDR???????2?o????????????????-????????????????????1????????????3??-???????????o????????'???????????????TDR?????????'?o??????????o|??????????o|???????????????????40?o|???????????30?o|???????????200?3????o??????????0?6?3????????????o0?3%FS??????????'?2??o|???????????????????????????????o???????????????????1???????????o??????????40?o|????3?????30?o|?'????a??????????????????????2??o||???????????????????????????????????????o|???????????    

3 TDR?????o???

????1????????????????|?????o??-??????1??????????-???????3??aTDR????????1???TDR????????1?????o?-?????????1??'???????????????o?????????????o?????????????-1#TDR?-??201?3???2#TDR?-??163?3???3#TDR?-??170?3???3??a?-?????-??????????????????????????o?????????3760?'?13?????????

???5 ?a????'????3?TDR???????-??3????

Fig?5 TDR monitoring subsystem of natural caving method

?????????????1???????|?????????-???????????????o??????????o?|?????o?????-??????????

???6  TDR???????-??????????

Fig.6  Position map of TDR monitoring hole

????????????|????7???8???9????o???

???7 1#TDR???-???-??1??????2?o????

Fig.7 Elevation curve of 1#TDR drilling breakpoint

???8 2#TDR???-???-??1??????2?o????

Fig.8 Elevation curve of 2#TDR drilling breakpoint

???9  3#TDR???-???-??1??????2?o????

Fig.9 Elevation curve of 3#TDR drilling breakpoint

????????-???????????o???

???1???1#TDR???-???-??1??????3757m-3758m?1??'??????????????3??????

???2???2#TDR???-???-??1??????3759m???

???3???3#TDR???-???-??1??????3791m???

??????????o????o?????'??????o|?????????????1#TDR???-??o???????a????????2#???3#??????2?????????????'??????|???????10????o???

???10 TDR????????????????'???????????

Fig.10 TDR test results are used to estimate the location of the caving surface

?-???????????????24??a????????????????????????????????????2#?o??o????3#TDR????????1???1?????????105???26??a??????o?????????????????-????????????????2#?o??o????3#TDR????????1?????-????'?13??|???o50m???2#?o??o????1??????o??????????????|?????-??2#?o??o?????'???????????????3#TDR????????1???1????2#?o??o????????????o?????????????????2#?o??o????3#TDR????????1???1??o???????????????????????????

   

???11 3#TDR????????1???1??????????????

Fig.11 Surface cracking of 3#TDR monitoring point

 

3 ????o

???????????TDR?????????????????o??????1????????????-??????????????-??1?????-???1????????????????1???????????o?????????????????????????a????'????3??'??????o|???????-????????a????????????????????????????o|????????o????????3????????1????????????????o??-???????o???????????o??|????????o???

???1?????????'?o?????????????????????????????????????3??????????o????????????o???????a??????????3??3????'????o?TDR????????????????????'?o??????????o|???

???2?????????'?o????????????????o??????????????????????????????-?????????????????????????????????'????a??-???????3????????????????????????????3?a????'????3??'?????o??o????????????

???3???????????2??o||???????????????????????????????????????o|??1????'?o???????o|????????????????

???4????????TDR??????2??o|??????????????'?????o??o????3????????????????????????????????????????a????'????3??'??????o|????????'????????

 


 


??????????-??? ??????? ?????'???-?????o?????a?o?????2?????????'????????????????????????o??????????????????2018?1'???8???

???????????3?o???????????'??????o?o?TDR ????????????????a????'????3???????'??????o|????????



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