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| Research on the Surrounding Rock Unstable Circle of the Empty Roadway under the Conditions of Soft Rock in Deep Coal |
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Received:May 04, 2013
Revised:June 26, 2014
Accepted:May 10, 2013
Published Online:December 17, 2014
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| DOI： |
| KeyWord:soft rock in deep coal; the empty roadway; unstable circle; numerical simulation |
| Author | Institution |
| Zhang xiaoyu |
School of Mechanics Architecture and Civil Engineering, China University of Mining and Technology Beijing |
| song zhiying |
Department of construction engineering ,Hebei professional college of politics and law |
| tian yuming |
National Network of Energy Abundance Coal and Electricity Co |
| he aidong |
National Network of Energy Abundance Coal and Electricity Co |
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| Abstract: |
| In order to solve the problem of the inhomogeneity of the rock crushing deformation to damage and the inaccuracies of the observations’result under the conditions of soft rock in deep coal, in this paper, the acoustic method and computer numerical simulation method can be used to conduct a comprehensive study on the surrounding rock unstable circle of the empty roadway. The accurate loose circle range can be obtained by integrating testing data in one coal mine area. It is not only beneficial to provide practical reference for similar conditions roadway, but also meaningful to show accurate basis and guidance for determining bolting parameter. |
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