Working face collapse column grouting waterproof treatment method

A technology of collapsed column and working face, which is applied in earth-moving drilling, wellbore lining, tunnel lining and other directions to achieve the effect of improving the overall water resistance, reducing the loss of coal loss and preventing water inrush accidents.

Inactive Publication Date: 2020-04-28
NORTH CHINA INST OF SCI & TECH +4
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Problems solved by technology

[0004] The purpose of the present invention is to provide a grouting waterproof treatment method for the work

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  • Working face collapse column grouting waterproof treatment method
  • Working face collapse column grouting waterproof treatment method
  • Working face collapse column grouting waterproof treatment method

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[0035] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are 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 making creative efforts belong to the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention relates to the technical field of coal mine disaster treatment, in particular to a working face collapse column grouting waterproof treatment method. The method comprises the following steps that a working face cut opening is pushed, and pushing is stopped until the safe distance between the working face cut opening and the collapse column is kept; two grouting auxiliary roadways anda plurality of grouting drill nests are tunneled at the positions, corresponding to the collapse column, of a transportation crossheading, and a plurality of corresponding grouting drill nests are tunneled at the positions, corresponding to the collapse column, of an air return crossheading; and inclination grouting drill holes are constructed in the grouting auxiliary roadways and the grouting drill nests in the transportation crossheading, inclination grouting drill holes are constructed in the grouting drill nests in the air return crossheading, and the final hole layers of all the grouting drill holes are controlled to be located in a bottom plate aquifer between the two bottom plate water-resisting layers of the coal seam. The method is not only suitable for preventing the situationthat the non-water-guide collapse column is activated and guides water due to mining influence, but also can reinforce the water-guide collapse column in a multi-layer grouting mode, the water insulation capacity can be improved, and it is ensured that no water damage accident occurs when the coal face is pushed over.

Description

technical field [0001] The present invention relates to the technical field of coal mine disaster control, in particular to a grouting water-repellent control method for a working face passing through a collapsed column, and in particular to a method including aperture selection for grouting drilling, layer selection for the final hole of drilling, and grouting materials, etc. Contents A new method of grouting to strengthen the collapsed column and its surrounding floor rock. Background technique [0002] At present, the geological conditions of coal mines in my country are complex and changeable. For the coal fields in North China, there is a thick to extremely thick layer of Ordovician limestone under the main coal mining seam. Confined water head, when the coal mining face advances, once the hydraulic connection with the Ordovician limestone is communicated through water-conducting structures such as subsidence columns, serious floor water inrush accidents will occur. Some...

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Application Information

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IPC IPC(8): E21D11/38E21D11/10E21B33/13
CPCE21B33/13E21D11/10E21D11/38
Inventor 程志恒李振华王公达殷帅峰李春元杨正凯马瑞欣陈亮王宏冰冯吉成王兆会
Owner NORTH CHINA INST OF SCI & TECH
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