Application of cross-hole seismic wave CT technology in the detection of grouting effect in multi-layer goaf in coal mine
The gob of coal mine may cause subsidence,deformation and other damage after the comple-tion of the ground building,which is easy to produce security risks.In order to ensure the safety of the ground building,it is necessary to control the gob.Because of the hidden nature of the gob grou-ting,the grouting effect detection is the key to ensure the quality of the treatment.It is impossible to evaluate the grouting effect of the gob as a whole and objectively only by the detection of single hole parameters.The cross-hole seismic wave CT technique is used to measure the wave velocity of the sec-tion in the detection area,and it is compared with the single hole detection parameter,so that the e-valuation of the grouting effect in the gob is more comprehensive,reasonable and accurate.The prac-tical application in the test of grouting effect of goaf control in Tashan Coal Mine proves that this technology has certain accuracy in the test of grouting effect and is worthy of popularization and appli-cation.
万方数据
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