Method for inhibiting mining damage depth based on clay-based slurry advanced grouting modified bottom plate hard rock

A technology of advanced grouting and mining damage, applied in earth-moving drilling, ground mining, mining equipment, etc., can solve problems such as the depth or range of floor damage, and achieve the effect of inhibiting or reducing the depth or range of damage

Active Publication Date: 2021-01-22
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

For example, a method for preventing and controlling water inrush from coal floor rocks on a confined water body (patent No. CN103291325A), a method for preventing and controlling limestone water in coal seam mining floors (patent No. CN110344850A), and a grouting method for limestone confined aquifers on coal seam floors Reinforcement and transformation method (CN111042831A), method of transforming floor limestone aquifer into natural and

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  • Method for inhibiting mining damage depth based on clay-based slurry advanced grouting modified bottom plate hard rock
  • Method for inhibiting mining damage depth based on clay-based slurry advanced grouting modified bottom plate hard rock
  • Method for inhibiting mining damage depth based on clay-based slurry advanced grouting modified bottom plate hard rock

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Embodiment Construction

[0045] see figure 1 , figure 2 with image 3 , shows the method of the present invention based on the advance grouting of clay-based grout to modify the bottom plate to suppress the mining damage depth.

[0046] The method for suppressing mining failure depth based on clay-based grout advanced grouting modified floor hard rock comprises the following steps:

[0047] Step 1: Analyze and determine the damage range and depth of the mining floor and the thickness of the effective water-resisting layer of the floor before the fracturing grouting modification.

[0048] According to the geological and hydrogeological data, combined with the columnar drilling, the lithology, thickness and combination structure characteristics of the floor strata were analyzed, and the spatial distribution of the distance between the confined aquifer 6 and the coal seam 1 was obtained according to the occurrence characteristics of the confined aquifer 6 below the working face feature.

[0049] Due...

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Abstract

The invention relates to a method for inhibiting mining damage depth based on clay-based slurry advanced grouting modified floor hard rock. The method starts from reducing or inhibiting damage depth or range of mining disturbance to a coal seam floor on the premise of not changing a coal mining process, advanced fracturing is conducted on a rock stratum with a certain layer position and thicknesswithin an original mining damage range through a ground or underground horizontal directional drill, penetration of a fracture network in the rock stratum is achieved, then clay-based slurry is injected into the penetration fracture network, the original rock stratum is modified into a clay flexible stratum, the flexible stratum can buffer vertical transmission of advance supporting pressure in afloor rock stratum in the mining process, so that the floor damage depth or range is restrained or reduced, and the purpose of preventing and treating water damage of the coal mine floor is achieved.

Description

technical field [0001] The invention relates to the technical field of water disaster prevention and control in underground engineering such as underground mines, and in particular to a method for suppressing mining damage depth based on clay-based grout for advance grouting to modify floor hard rock. Background technique [0002] Water inrush from the coal mine floor has always been one of the most prominent problems that plague and threaten the safe production of coal mines in my country. According to incomplete statistics, in the past 20 years since the 1990s, more than 250 mines in my country have experienced water inrush and flooding accidents. , The direct economic loss is as high as more than 40 billion yuan, which has brought serious personal casualties and huge economic losses to the enterprise, and also caused great damage to the water environment and water resources in the mining area. With the increase of coal mine mining depth, under the coupling effect of high c...

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Application Information

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IPC IPC(8): E21D11/38E21D11/10E21C41/18
CPCE21D11/38E21D11/105E21C41/18
Inventor 柳昭星董书宁王皓赵春虎柴建禄姬亚东王晓东
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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