A method for plugging off layer water supply source

A layer-separation and replenishment technology, applied in earthwork drilling, shaft equipment, wellbore lining, etc., can solve the problems of large grouting drilling engineering volume and increased grouting, so as to improve the grouting efficiency, reduce the cost, and eliminate the threat of water damage Effect

Inactive Publication Date: 2018-10-23
宿州学院
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems in the prior art, such as the large amount of grouting drilling engineering, the grouting "blind area" and the increase of additional mine pressure of fully mechanized mining supports, and provide a method for plugging the source of absorptive water supply to solve the problem. above question

Method used

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  • A method for plugging off layer water supply source
  • A method for plugging off layer water supply source
  • A method for plugging off layer water supply source

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 Shown, a kind of plugging method of absorptive water replenishment source is suitable for inclined rock coal seam; comprises the following steps:

[0040] Step 1. Locate all abscissions in the overburden

[0041] Such as Figure 2 to Figure 4 As shown, the coal-measure strata are composed of soft and hard rock layers with different physical and mechanical properties. Generally, this kind of thick and hard rock layer plays a key control role in the movement of rock layers caused by coal mining, so it is called the key layer in the literature. The location of potential abscission space is between the key layer and the weak rock layer below it. In the overlying rock, there may be many combinations of such key layers and weak rock layers, so there are also multiple potential abscission spaces, which need to be determined one by one. Judging the first key layer 11, the second key layer 12, the third key layer 13, etc. according to the lithology and thic...

Embodiment 2

[0058] The following takes two grouting hole groups as examples to describe in detail:

[0059] Such as Figure 5 , Image 6 , Figure 7 As shown, the working face is determined by the machine lane 20, the wind lane 30, the cut eye (starting point of recovery) and the closing end (end point after recovery), and its length is L and the width of the slope is S. First determine the disastrous detachment layer 43 according to the method provided in embodiment 1, and the detachment water supply line above the wind tunnel, then design "one station porous group" (a grouting station 50 and a plurality of grouting holes) according to the site conditions Group abbreviation) grouting scheme. Specifically:

[0060] (1) The grouting station 50 is built in the middle of the two grouting hole groups, and its function is to prepare the grout according to the engineering requirements of preventing and controlling the water damage of the separation layer 43, and transport the grout through ...

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Abstract

The invention provides a plugging method for a separated layer water recharge source. The plugging method comprises the following steps that firstly, the positions of all separated layers in overlaying rock are determined; secondly, a disastrous separated layer is determined according to the height of the maximum caving zone and the height of the maximum water flowing fracture zone; and finally, grouting is conducted through a grouting station and a plurality of hole groups, an integrated water stop plug is formed, and thus, a recharging channel of water in a loose aquifer for the separated layers is plugged. Compared with the prior art, under the condition that the plugged separated layer water recharge source serves as an aquifer, the plugging method has the advantages that the grouting hole drilling work amount is small, the mine pressure additionally applied to a fully mechanized mining supporter is small, no grouting dead zone exist, the grouting efficiency is high, and the plugging effect is good.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and specifically relates to a method for plugging a detachment water supply source. Background technique [0002] In recent years, "separated layer water" floods on the roof of coal mines have occurred frequently, causing shocking casualties and property losses. The "5.21" abscission water outburst accident in Haizi Coal Mine, Huaibei Coalfield in 2005 caused a total of 5 deaths, and the maximum water inrush volume was 3887m 3 / h, and formed a secondary disaster of rock burst; in 2015, the "1.30" delaminated water disaster in Zhuxianzhuang Coal Mine caused a total of 7 deaths, and the maximum water inrush was 7200m 3 / h, the mining face is flooded. [0003] In the coal seam roof overlying rock, when there is a large difference in engineering geological properties between the thick and hard rock layer (commonly known as "key layer") and the underlying weak rock layer, under the influe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10E21D11/38
CPCE21D11/10E21D11/38
Inventor 桂和荣
Owner 宿州学院
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