Deep Study on Rapid Passing of Collapse Columns in Fully Mechanized Mining Face Technology
In response to the technical difficulties faced by the Xw41 and Xw44 collapse columns in the W3303 fully mechanized mining face,based on different methods of exploration of the collapse columns in the working face,further exploration is conducted on the grouting treatment measures for the collapse columns.The results indicate that the Xw41 and Xw44 collapse columns are weakly water rich and non conducting collapse columns.The bottom waterproof layer of Xw41 collapse column and Xw44 collapse column is a relatively safe zone.The standard grouting pressure for grouting completion is 10 MPa,which lasts for more than 30 min,achieving effective transformation and reinforcement of the collapsed column.
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