Dense roadway group rock burst hazard prediction method

A technology of rock burst and prediction method, which can be used in earth-moving drilling, mining equipment, mining equipment, etc., and can solve problems such as little effect.
CN102392685BInactive Publication Date: 2014-02-05SHANDONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV OF SCI & TECH
Publication Date
2014-02-05
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a dense roadway group rock burst hazard prediction method. The method includes the following steps: first acquiring the dynamic sensitive area of a coal bed in a dense roadway group area; then mounting roof dynamics monitors along a direction leading to a dense roadway group to carry out roof dynamics observation; before a dynamic area stress range related to coal mining gets close to the dense roadway group, mounting highly sensitive stressmeters in the sensitive area to observe stress change, and when the stress increment is abruptly changed, carrying out rock burst hazard monitoring. By means of an artificial blasting technique in the dense roadway group, the method acquires the coal-rock stratum disturbance-sensitive area, finding a vulnerable area; the roof dynamics method is adopted to acquire the tendency characteristics and range of dynamic stress and quantitatively describe the distribution rule of the dynamic stress; delicate physical quantity observation timely judges the early disturbance response of the dense roadway group, rock burst hazard process monitoring is carried out before high energy is released, and the hazard level is judged by means of indexes.
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Description

technical field

[0001] The invention belongs to the technical field of coal mining. Background technique

[0002] The scientific prediction of rock burst is the key to the prevention and control of rock burst. Research in this area has made some progress in recent years. The current monitoring technology mainly includes the following aspects.

[0003] Drilling cuttings method: The distribution characteristics of the bearing pressure, that is, the peak value of the bearing pressure and its distance from the coal wall, are generally detected by the drilling cuttings method. Drilling cuttings method is a method to identify the risk of impact by drilling a hole with a diameter of 42-50mm in the coal seam, according to the amount of coal powder discharged and its changing law and related dynamic effects.

[0004] Acoustic emission (ground sound) and microseismic monitoring: The ground sound and microseismic monitoring method is a method of rockburst prediction and prediction d...

Claims

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