Method for reconstructing floor limestone aquifer into natural-artificial composite integrated aquiclude

A technology of artificial composite and water-proof layer, applied in the field of mining or quarrying, can solve the problems of complex geological conditions of hydrology and engineering, and achieve the effect of improving the critical value
CN104989403AActive Publication Date: 2015-10-21CHINA COAL XINJI ENERGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA COAL XINJI ENERGY CO LTD
Publication Date
2015-10-21

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Abstract

The invention provides a method for reconstructing a floor limestone aquifer into a natural-artificial composite integrated aquiclude. The method comprises the following steps: carrying out research on prevention and treatment of harm of limestone water in a coal seam floor on a working face and determining a target layer for grouting reinforcement; constructing an end hole along the inclination direction of limestone in the target layer; carrying out advanced detection on the target layer via the position of the constructed end hole and subjecting the target layer to grouting reinforcement and reconstruction; and carrying out comparative study on the water-resisting properties of the layer before and after grouting. According to the invention, since the floor limestone aquifer is reconstructed into a natural-artificial composite integrated key water-resisting layer through grouting reinforcement, the integral strength of floor rock and the critical value of a water bursting coefficient are improved, prevention and treatment of hazards of deep high-confined limestone water are realized, and important guarantee is provided for safe stoping of the working surface.
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Description

technical field

[0001] The invention relates to the technical field of mining or quarrying, in particular to an underground or surface mining method. Background technique

[0002] There are 26 layers of coal seams in the Huainan mining area, which are divided into five groups, which are A, B, C, D, and E groups from bottom to top. Layers 1 and 2 have an average cumulative thickness of about 7 meters and reserves of 1.75 billion tons. Compared with the coal seams of the upper groups, the coal of group A has superior coal quality and high calorific value, reaching more than 6000 kcal, which is higher than that of other groups, and the coal type is good, 1 / 3 coking coal, which can be used as coking coal. Moreover, the coal seams of this group are thick, and the combined average thickness of coal seams 1 and 3 is 7 meters. In addition, the shallow part is affected by wind oxidation, some gas has been released, and the gas content is relatively low. Because of these advantages...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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