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Experimental method for studying reverse fault ground stress in coal mine roadway

A technology of coal mine roadway and experimental method, which is applied in the directions of earth-moving drilling, wellbore/well components, extraction of undisturbed core devices, etc., to achieve the effect of reducing the risk factor, reducing working time, and reducing measurement costs

Inactive Publication Date: 2020-08-25
NORTH CHINA INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, there is no complete set of experimental methods to carry out relevant research and testing on the stress of reverse faults.

Method used

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  • Experimental method for studying reverse fault ground stress in coal mine roadway
  • Experimental method for studying reverse fault ground stress in coal mine roadway
  • Experimental method for studying reverse fault ground stress in coal mine roadway

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Experimental program
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Embodiment Construction

[0047] The present invention will be further described by describing the embodiments below in conjunction with the accompanying drawings.

[0048] The invention discloses an experimental method for studying the ground stress of a reverse fault in a coal mine roadway, which comprises the following steps:

[0049] S1, coal mine roadway drilling rock core on site, the steps of drilling rock core on site are,

[0050] 1), determine the drilling position of the core:

[0051] a. According to the location of the reverse fault, the roadway is divided into two parts: the hanging wall of the reverse fault and the footwall of the reverse fault. One side is the footwall of the reverse fault;

[0052] b. Mark two core drilling holes on the roadway walls of the hanging wall of the reverse fault and the footwall of the reverse fault respectively. The two drill holes in the footwall of the reverse fault are marked 2-1 and 2-2 respectively;

[0053] 2) Select a suitable core drill rod acc...

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Abstract

The invention discloses an experimental method for studying the reverse fault ground stress of a coal mine roadway. The experimental method comprises the following steps that S1, rock cores are drilled on a coal mine roadway site; S2, in a laboratory, required rock core test blocks are drilled in the drilled rock cores of 1-1, 1-2, 2-1 and 2-2 correspondingly; S3, an MTS test machine is combined with an acoustic emission testing device, the secondarily drilled rock core test blocks are subjected to single-axis compression testing correspondingly, and Kaiser effect points of all the test blocksand the positive stress corresponding to the Kaiser effect points are obtained; S4, the acoustic emission ground stress is calculated to obtain the magnitude of the principal stress; and S5, according to the Kaiser effect points and the principal stress, the influences of the reverse fault ground stress on laying of the coal mine roadway are analyzed. According to the experimental method, the accuracy of obtained reverse fault ground stress data can be guaranteed, and an effective and reasonable basis is provided for laying of the coal mine roadway.

Description

technical field [0001] The invention relates to a reverse fault ground stress test technology, in particular to an experimental method for studying the reverse fault ground stress of a coal mine roadway. Background technique [0002] A reverse fault is a kind of geological structural fault, which is a fault in which the hanging wall rises and the footwall falls relatively, and is mainly formed by horizontal extrusion and gravity. At present, in the tunneling of coal mine roadways, reverse faults will also be encountered. Because the relative concentration of stress near the reverse fault zone and the fragmentation of surrounding rocks bring huge safety hazards to roadway layout and maintenance, it is urgent to test the occurrence of ground stress near the reverse fault in order to provide an effective basis for the layout of coal mine roadways. At present, there is no set of perfect experimental methods to carry out relevant research and testing on reverse fault stress. C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/16E21B25/00E21B49/02E21B49/00
CPCE21B25/00E21B25/16E21B49/006E21B49/02
Inventor 彭瑞欧阳振华刘金海朱建明刘晓辉秦洪岩赵希栋朱权洁陈莞阳王一哲王柳茜
Owner NORTH CHINA INST OF SCI & TECH
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