| ULTRASONIC CHARACTERISTICS OF THE DISTURBED COAL MASS |
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| 作者姓名： | Lu Shaolin He Jishan |
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| 作者单位： | Institute of Applied Geophysics，Central South Universityof Technology，Changsha 410083，China |
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| 摘 要： | Spontaneousoutburstsareanintricatephenomenonofgasdynamicsandoneofthemostseriousdisastersincoalmining.Theoccurrenceofcoalandgasoutburstsisunevelydistributedbothinareaandgeologicalcrosssection.Theresultsofextensivescientificstudiesconductedintheworldshowthattheplacewherecoalandgasoutburstsoccurismainlyinthepeculiarzones.Thesezoneshavesoftbandssufferingfromseriousgeologicaldisturbances.ThedistructionofcoalmasstextureisaprerequisitetocoalandgasoutburstsLlj.Someresearcherspredictandforecastoutburs…
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| 收稿时间： | 28 May 1996 |
ULTRASONIC CHARACTERISTICS OF THE DISTURBED COAL MASS |
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| Lu Shaolin, He Jishan.ULTRASONIC CHARACTERISTICS OF THE DISTURBED COAL MASS[J].Journal of Central South University of Technology,1997,4(1):42-45. |
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| Authors: | Lu Shaolin He Jishan |
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| Affiliation: | (1) Institute of Applied Geophysics, Central South University of Technology, 410083 Changsha, China |
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| Abstract: | Coal and gas outbursts are a mechanical dislocation process of a gas-logged and porous medium.The existence of the disturbed coal is a precondition of the outbursts. The study showed that the disturbedcoal and normal coal are greatly different in mechanical and physical properties which decided the speeds of ultrasonic wave travelling in them. This paper presents a set of experimental measuring system and method.The resultal of measurements conducted in 60 min areas revealed quite different ultrasonic characteristics indifferent types of coal mass textures. Measuring the disturbed coal is a new way for predicting the outbursts. |
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| Keywords: | ultrasonic characteristics disturbed coal mass coal and gas outbursts |
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