Fault zone rock burst dangerousness monitoring method

A technology of rock burst and danger, applied in the field of coal mining, can solve the problem of difficult quantitative determination of the stress state of the coal body, and achieve the effect of facilitating defensive measures and avoiding accidents.

Inactive Publication Date: 2017-02-22
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

Therefore, the monitoring of the stress process of the coal seam is the key. Since the coal seams at the two sides of the roadway are in a broken state, it is difficult to quantitatively determine the stress state

Method used

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  • Fault zone rock burst dangerousness monitoring method
  • Fault zone rock burst dangerousness monitoring method
  • Fault zone rock burst dangerousness monitoring method

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Embodiment Construction

[0018] Such as figure 1 and figure 2 As shown, the fault zone rock burst risk monitoring method of the present invention is:

[0019] 1. Delineation of hazardous areas

[0020] According to the occurrence of fault 3, the mining environment and the direction of roadway 1, and according to the appearance of rock pressure during fault excavation, the dangerous area of ​​the fault zone is delineated, and the dangerous area is divided into broken Severe segment and relatively stable segment.

[0021] 2. Layout of observation points and observation instruments

[0022] Arrange observation holes in dangerous areas, and embed stress gauges 2 in the observation holes; it is required to arrange a group at a distance of a=4-5m in the severely broken section, and arrange a group at a distance of d=8-10m in the relatively stable section, and every two is one The burial depths are respectively b=8 and c=10m; the stress gauge 2 is required to be a sensitive rigid stress gauge, which can...

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Abstract

The invention discloses a fault zone rock burst dangerousness monitoring method. The method comprises the steps that a dangerous area is divided into a seriously broken section and a relatively stable section; observation points and observation instruments are arranged in the seriously broken section and the relatively stable section; the stress changes of all stress gauges are observed, read and recorded by an observation instrument in real time, so as to acquire a stress-time curve; and the rock burst dangerousness is determined according to the curve. According to the invention, rock burst dangerousness can be timely found for a fault zone and a deep rock burst mine, which is convenient for taking defensive measures to avoid accidents.

Description

technical field [0001] The invention belongs to the technical field of coal mining. Background technique [0002] Rockburst in coal mines in my country is closely related to geological conditions, and rockburst in geological structure areas accounts for more than 60% of the total. With the increase of coal mining depth, the frequency and intensity of rock bursts in structural areas are increasing. Due to the fragmentation and difficulty of observation of faults, in recent years, rock bursts in fault areas have increased, accounting for structural rock bursts. With a large proportion, this kind of fault fracture zone impact disaster has seriously restricted the safe production of coal mines in my country. Practice has proved that when the roadway excavates into the fault zone and the working face advances to the fault zone, due to the relatively soft rock strata in the fault fracture zone, the fracture range is large, and the coal seam has a strong impact risk, rock burst wil...

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/6242
Inventor 潘立友
Owner SHANDONG UNIV OF SCI & TECH
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