Large buried depth thin bedrock area high seam full-mechanized caving mining pressing frame water-inrush control method

Abstract

The invention discloses a large buried depth thin bedrock area high seam full-mechanized caving mining pressing frame water-inrush control method comprising the following steps that 1, by means of geophysical prospecting or drilling, and a bedrock structure and rock parameters above a coal seam can be obtained; 2, based on a key stratum theory, and the bedrock structure above the coal seam is classified; 3, based on classification results of a bedrock above the coal seam, a overlying strata fracturing structure of a mining face is analyzed and determined; 4, reasonable working resistance of amining support is calculated according to the overlying strata fracturing structure of the mining face; 5, locations and parameters of key rock strata of water damage control is determined; and 6, control measures are formulated based on determined locations and parameters of the key rock strata of the water damage control. The large buried depth thin bedrock area high seam full-mechanized cavingmining pressing frame water-inrush control method can prevent the working face from occurrence of frame pressing and water collapsing accident, and the working face is caused to shutdown to cause great economical loss, and safe and efficient mining of coal mines is realized.

Description

technical field [0001] The invention relates to the technical field of coal mine mining safety, in particular to a method for preventing and controlling water inrush in fully mechanized caving mining of a thick coal seam in a thick coal seam with deep buried depth and thin bedrock. Background technique [0002] Coal seams with deep and thin bedrock geological conditions in my country are very rich in coal seam reserves. There are coal seams with special geological conditions such as deep buried and thin bedrock in many mining areas such as western mines and North China mines. The rock thickness is even within 50m, and the thickness of the coal seam is more than 6m in one-time mining. The burial depth of these mining areas is deeper than Shendong, and the burial depth is greater than 200m, and the coal seam is also thicker. , Qidong is more complex, mining will be more difficult. For example, in the minefields of Sima, Nanzhai and Jingfang in the Lu'an mining area, there are l...

AI Technical Summary

Problems solved by technology

Under such difficult conditions, after the working face is mined with fully mechanized top coal caving, if the stope support parameters are designed according to the traditional mining technology, it will be difficult for the basic roof and key layers to exist in the bedrock, and it will not be possible to form a self-stable load-bearing structure. Accidents such as press frame and water collapse will occur in the working face, which will lead to the shutdown of the working face and cause huge economic losses, making it impossible to realize safe and efficient mining

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