Novel method for identifying crustal stress abnormal area and measuring crustal stress in large range

A ground stress, large-scale technology, applied in special data processing applications, using acoustic wave emission technology for material analysis, instruments, etc., can solve the problem of working environment conditions, harsh construction requirements, expensive hydraulic fracturing, high testing costs, etc. problems, to achieve the effect of reducing workload and economic cost, reducing economic cost and workload, and improving accuracy and reliability

CN112100842AActive Publication Date: 2020-12-18JIANGXI UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-12-18

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Abstract

The invention belongs to the technical field of protolith stress measurement, and discloses a novel method for identifying a crustal stress abnormal area and measuring crustal stress in a large range,which comprises the following steps of: measuring protolith stress of reference points, calculating protolith stress of each reference point and the position of each reference point, and calculatingthe protolith stress in the whole area to be measured, drawing a protolith stress region distribution diagram in the region; marking the positions of the arranged to-be-measured points in the protolith stress area distribution diagram; drilling rock samples in different directions required for measuring crustal stress by an acoustic emission method; measuring the protolith stress by adopting a method of combining acoustic emission and characteristic stress, if the difference between a measurement result and an interpolation inversion result is large, recording the point as a protolith stress abnormal point, and measuring the protolith stress of the point by using a trepanning stress relieving method. The method is low in economic cost, high in technical applicability and simple in construction environment, the economic cost and workload can be effectively reduced, and basic data can be provided for design optimization and stability calculation of underground rock engineering.
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Description

technical field

[0001] The invention belongs to the technical field of original rock stress measurement, and in particular relates to a new method for identifying abnormal areas of in-situ stress and measuring in-situ stress in a large range. Background technique

[0002] At present, under the action of long-term gravity and tectonic movement, complex in-situ stress field has been formed. This undisturbed in-situ stress is called natural stress, also known as initial stress and original rock stress. It is the fundamental force that causes the deformation and destruction of various underground rock engineering surrounding rocks, and is one of the most important factors that determine the physical and mechanical properties of engineering rock mass. Only after obtaining the stress information of the original rock in the area where the underground rock engineering is located, can the stability of the rock engineering be calculated and analyzed, and then the excavation design opt...

Examples

Embodiment Construction

[0067] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0068] Aiming at the problems existing in the prior art, the present invention provides a new method for identifying abnormal areas of geostress and measuring geostress in a large range. The invention will be described in detail below in conjunction with the accompanying drawings.

[0069] like figure 1 As shown, the new method of identifying geostress anomaly area and large-scale measurement geostress provided by the embodiment of the present invention comprises the following steps:

[0070] S101, measuring the original rock stress at the reference point by using the casing stress relief method.

[0071] S102, make statisti...