A method for preventing and controlling water and sand inrush in coal mining

A technology of coal mining and sand breaking, applied in mining equipment, earth-moving drilling, mining equipment, etc., can solve the problems of loss, poor safety, huge treatment cost, etc., to reduce suddenness, simple implementation, and good safety. Effect

Active Publication Date: 2021-07-02
XIAN UNIV OF SCI & TECH
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Problems solved by technology

[0004] 1) Water and sand inrush in coal mining is mostly passive prevention and control, that is, prevention and control is carried out after the disaster occurs, causing certain losses;
[0005] 2) There is also active prevention and control of water and sand inrush in coal mining, but there is no specific analysis of the differences in conditions. Using the same method, the cost of treatment is huge;
[0006] 3) Water and sand bursts are often sudden, lack of monitoring measures, and poor safety;
[0007] 4) Grouting is mostly used in the prevention and control of water and sand inrush, but the injection of grout is relatively traditional and the effect is poor

Method used

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  • A method for preventing and controlling water and sand inrush in coal mining

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with specific embodiments.

[0024] A mine needs to mine the No. 2 coal seam. The No. 2 coal seam of the 2203 coal mining face is covered with rocks, cohesive soil and sand. When the No. 2 coal seam is mined due to the limited thickness of the rock, water and sand inrush accidents are prone to occur. In order to prevent sudden For the occurrence of water and sand intrusion accidents, refer to figure 1 , take the following steps to prevent and control coal mining water and sand inrush accidents:

[0025] Step 1: Obtain various geological parameters before coal mining. Obtain the coal seam thickness m from the histogram of the borehole 1 is 3 meters, and the thickness of the rock covered above the coal seam is m 2 is 18 meters, and the thickness of the cohesive soil covered on the rock is m 3 is 60-80 meters, and the thickness of the sand layer covered on the cohesive soil is m 4 It is 2 to 20 met...

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Abstract

A method for preventing and controlling water inrush and sand inrush in coal mining, comprising the following steps: Step 1: obtaining various geological parameters before coal mining; Classification of water and sand inrush conditions; divided into 3 categories; Step 4: Pretreatment of the sand layer before coal mining; Step 5: Monitoring of sand layer groundwater and potential water and sand inrush channels during coal mining; Step 6 : the prevention and control of lagging occurrence of water and sand inrush after coal mining; Step 7: the mining of coal resources has been completed, and no water and sand inrush accidents have occurred; The advantages of pertinence and good security.

Description

technical field [0001] The invention relates to the technical field of mine geology, intersects with the technical fields of mining engineering and safety engineering, and in particular relates to a method for preventing and controlling water and sand inrush in coal mining. Background technique [0002] Shallow coal mining in my country is mostly affected by water and sand inrush, causing casualties and huge economic losses. Therefore, coal mining must carry out the prevention and control of water and sand inrush. [0003] There are many coal mines for the prevention and control of water inrush, and the disaster of water inrush and sand inrush is relatively hidden, and the mechanism of occurrence is complex, which is often ignored. The specific problems are as follows: [0004] 1) Water and sand inrush in coal mining is mostly passive prevention and control, that is, prevention and control is carried out after the disaster occurs, causing certain losses; [0005] 2) There ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00
CPCE21F17/00
Inventor 陈伟赵夏陈茜李阳雷新翔
Owner XIAN UNIV OF SCI & TECH
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