Title: Rational coal caving step distance setting for fully mechanized longwall top coal caving face under soft fine sandstone roof
Abstract: According to the thick seam conditions with fine sandstone in the roof,the paper analyzed th einflunce law of the different coal caving step distance under different lump coal from the top coal to the coal and refuse flow form and coal and refuse mixed and provided the principle to select the coal caving step distance under the different coal and refuse sizes with the simulated theory and the test method of the bulk simulated model.The research results showed that the three coal mining operations and one caving operation would be favorable to control the fine sandstone in the roof and could reduce the sand content in the coal from the caving.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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