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- W2379706869 abstract "South transportation roadway of depth of 955 m in Huainan Dingji Mine western coal area has shown the characteristics of the deep excavation.In order to investigate fracturing behavior of the surrounding rock in the deep roadway,two sections(the width is 5.0 m,and the height is 3.8 m) are selected.Five boreholes are drilled as fan array in the arch of the every section.The variation of electrical resistivity of surrounding rock with borehole depth can be measured.Electrical resistivity is one of the important electric parameters for rocks.The degree of rock mass fracturing has great influence on electric resistivity;and generally electrical resistivity changes suddenly in the fractural location.Using ResiTest–4000 resistivity tester and self-developed downhole probe,the electric resistivity of rock mass in the boreholes is tested.A reference value of electrical resistivity on disintegrated zones of rock mass can be determined according to average electrical resistivity(to reject abnormal data) in every hole;and the ones greater than the reference values are disintegrated rock mass.According to the test resultst,he diagrams of zonal disintegration distribution of surrounding rock of the roadway are drawn.In addition,the diagrams are in agreement with ones obtained from borehole TV video.The results show that there are four disintegration zones in the surrounding rock of the roadway;the radius of the disintegrated zones has a linear relationship with the radius of the roadway;the thickness of the disintegrated zones near the roadway boundary is maximal and up to 3.12 m;and the thickness of disintegrated zones decreases in turn with borehole depth." @default.
- W2379706869 created "2016-06-24" @default.
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- W2379706869 date "2009-01-01" @default.
- W2379706869 modified "2023-09-24" @default.
- W2379706869 title "APPLICATION OF ELECTRIC RESISTIVITY METHOD TO ZONAL DISINTEGRATION EXPLORATION OF DEEP ROADWAY" @default.
- W2379706869 hasPublicationYear "2009" @default.
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