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

Active Publication Date: 2015-10-21
CHINA COAL XINJI ENERGY CO LTD
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Problems solved by technology

[0003] Xinji No. 2 Mine exploits the coal seam below the Fufeng nappe on the north side of the Shouxian Laorencang Fault ...

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

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Embodiment Construction

[0032] Such as figure 1 As shown, the technical scheme of the present invention is specifically described below by taking the implementation of the method of transforming the floor limestone aquifer of the present invention into a natural and artificial composite complete water-resisting layer on a certain working face in a mining area as an example.

[0033] The method for transforming the floor limestone aquifer into a natural and artificial composite complete water-resisting layer comprises the following steps:

[0034] ① Research on the prevention and control of limestone water damage in the coal seam floor 100 in the mining working face, that is, analyze the threat caused by the limestone aquifer to the mining of 1 coal 600, and determine the damage depth of the coal seam floor 100 through simulation, calculation, and actual measurement analysis, and Therefore, it is determined that the 3rd ash 200 and 4th ash 300 in the upper section of Taihui are used as the target laye...

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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.

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

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Application Information

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IPC IPC(8): E21C41/16E21C41/26
Inventor 傅先杰白海波王厚柱周学年
Owner CHINA COAL XINJI ENERGY CO LTD
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