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Collapse column exploration method based on pressure seepage principle and electromagnetic response characteristics

A technology of response characteristics and collapsing pillars, which is applied in the field of collapsing pillar detection, can solve problems such as missed inspections, and achieve the effects of increasing production costs, reducing reserves, and reducing mining efficiency

Active Publication Date: 2022-02-01
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no clear requirement on the spacing of the advanced detection holes of the collapsed column, and there is a risk of missed detection

Method used

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  • Collapse column exploration method based on pressure seepage principle and electromagnetic response characteristics
  • Collapse column exploration method based on pressure seepage principle and electromagnetic response characteristics
  • Collapse column exploration method based on pressure seepage principle and electromagnetic response characteristics

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Embodiment 1

[0063] according to figure 1 , figure 2 As shown in the technical process, when the mining operation is carried out at the Renlou Coal Mine-720 level of Wanbei Coal and Electricity Group in Anhui Province, the method of the present invention is used to detect the collapsed column, which specifically includes the following steps:

[0064] (1) In Renlou Coal Mine 7 3 Near the 24S working face, the specific location is selected. The working face is close to the closing line position - 720 Beida Lane to construct six water injection exploration drilling holes with a depth of 120m;

[0065] (2) After drilling 6 is completed, reserve a water injection pipe 7 in the hole. The length of the water injection pipe 7 is 70m, and then seal the hole with cement water glass grouting at the rear end of the opening of the borehole about 30m, so that the water injection pipe 7 It is fixed in the borehole 6 to ensure that when high-pressure water is injected into the borehole 6, no leakage wi...

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Abstract

The invention discloses a collapse column exploration method based on a pressure seepage principle and electromagnetic response characteristics. The collapse column exploration method comprises the following steps: (1) constructing a drill hole; (2) sealing the orifice end of the drill hole; (3) injecting water into the drill hole at high pressure; (4) monitoring a transient electromagnetic field in real time; (5) observing water flow and pressure change; (6) calculating parameters; (7) judging whether a collapse column exists or not; and (8) treating collapse column grouting. When the method is used for detecting the collapse column in the mine, omission is avoided, potential safety hazards existing in underground construction operation are avoided, safety and reliability are achieved, the technology is feasible, economical and reasonable, the detection process is fast and effective, the collapse column can be effectively detected in time and treated, and safety of the underground construction operation is practically guaranteed.

Description

technical field [0001] The invention relates to a method for detecting a collapsed column based on the principle of pressure seepage and electromagnetic response characteristics, and belongs to the technical field of mine prevention and control of collapsed column water damage. Background technique [0002] Collapse column, commonly known as "carbon-free column", is interpreted as karst collapse column in "Karstology Dictionary", which is a small cone-shaped top and bottom large cone formed by the collapse of the top rock layer and overburden of the underground cave in the buried karst area. The subsidence body is a common structural water-conducting channel in the process of coal mining in my country. Due to the destruction of the collapsing column, the loss of coal reserves in the production mine is as high as 15% to 30%, which greatly reduces the reserves in the mine field, reduces the mining efficiency, increases the production cost, and even shortens the service life of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/04E21B47/113E21B49/00E21B33/13E21F17/00
CPCE21B7/04E21B47/113E21B49/008E21B33/13E21F17/00Y02A90/30
Inventor 童世杰许进鹏鹿存金王创李毅王通明
Owner CHINA UNIV OF MINING & TECH
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