Title: The balance structure of main roof and its action to immediate roof in large cutting height workface
Abstract:Based on the site measure data of upper rock layer and the showing characteristics of ground pressure (around in) large cutting height workface, the broking position and balance structure of the main ...Based on the site measure data of upper rock layer and the showing characteristics of ground pressure (around in) large cutting height workface, the broking position and balance structure of the main roof were studied.The results indicate that the broking position of the main roof is in front of the coal face, there is a balance structure of upper rock layer in higher level compared with the layered extraction.The activity of the structure is a grade process, in which the balance structure and the immediate roof interact, and the activity way relates to the multi-damage of the immediate roof.The given deformation pressure on support is relevant to integral mechanical properties and the damage feature of the immediate roof. It is remarkable that the residual strength of damaged immediate rock influence on the load of support influenced by balance rock layer.Read More
Publication Year: 2004
Publication Date: 2004-01-01
Language: en
Type: article
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Cited By Count: 12
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