Method for determining directional drilling grouting layer of coal seam floor confined aquifer

A technology for confined aquifers and coal seam floors, applied in earthwork drilling, resources, wellbore linings, etc., can solve the problems that there is no mature and reliable method for selecting or determining floor aquifers, and achieve the effect of improving the effect

Pending Publication Date: 2020-11-13
CCTEG COAL MINING RES INST +1
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Problems solved by technology

At present, the management level is mostly determined based on the experience of water disaster prevention and control, and th...

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  • Method for determining directional drilling grouting layer of coal seam floor confined aquifer

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Embodiment Construction

[0045] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0046] It should be clear that in order to illustrate the present invention more clearly, numerous technical details are described in the following specific embodiments, and those skilled in the art should understand that the present invention can also be implemented without some of the details. In addition, in order to highlight the gist of the present invention, some methods, means, components and their applications that are well known to those skilled in the art are not described in detail, but this does not affect the implementation of the present invention. The embodiments described herein are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of t...

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Abstract

The embodiment of the invention discloses a method for determining a directional drilling grouting layer position of a coal seam floor confined aquifer, and belongs to the field of mine water damage prevention and control. Parting the water-bearing and water-resisting layer structures of the coal seam floor, and determining the distribution condition of the main water-bearing layer on the coal seam floor; performing aquifer integrity coefficient calculation and evaluation on the determined main aquifer, and selecting the aquifer with deposition continuity and stability as a pre-selected grouting target layer; obtaining the mining damage depth Cp of the bottom plate and the water blocking coefficients zi of different lithologic rock strata of the bottom plate; calculating and evaluating thewater-resisting layer and water pressure elements of the pre-selected grouting target layer, and preliminarily determining a directional drilling grouting layer position; testing and evaluating the hydraulic relationship between the pre-selected grouting target layers; and comprehensively determining the directional drilling grouting horizon according to the preliminarily determined directional drilling grouting horizon and the obtained interlayer hydraulic relationship. And a better directional drilling grouting layer position can be conveniently and reliably determined, so that the effect of treating water disasters in a directional drilling area can be improved.

Description

technical field [0001] The invention belongs to the field of mine water disaster prevention and control, and in particular relates to a method for determining the directional drilling and grouting layer of a confined aquifer of a coal seam floor. Background technique [0002] Under the action of water pressure, mine pressure and other factors, the confined aquifer water of the coal seam floor overcomes the resistance of the rock mass strength of the relative water-resisting layer between the coal seam and the karst aquifer and the resistance of structural planes such as faults and joints, and passes through the floor rock. The phenomenon that the water guide channel formed by the damaged surface formed in the body suddenly pours into the working face or roadway is called floor surge (burst) water. With the mining of coal, the grouting is transferred to the deep part, the thickness of the water-resisting layer of the coal seam floor is getting thinner, the water pressure it b...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/02E21D11/10E21D11/38
CPCE21D11/10E21D11/38G06Q10/0639G06Q50/02
Inventor 樊振丽王志晓胡炳南赵秋阳于秋鸽孙林
Owner CCTEG COAL MINING RES INST
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