Large three-dimensional detachable similar simulation experiment device for drilling cuttings

A similar simulation experiment, three-dimensional technology, applied in the field of large-scale three-dimensional detachable drill cuttings similar simulation experiment device, can solve the problems of loading rigid plate can not follow, large force at the jack indenter, small size, etc., to avoid The effect of boundary effect, reducing experimental error and improving accuracy

CN112748016AInactive Publication Date: 2021-05-04LIAONING TECHNICAL UNIVERSITY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-05-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A large three-dimensional detachable similar simulation experiment device for drilling cuttings comprises a detachable counter-force frame, a top hydraulic loading oil cylinder set, a side hydraulic loading oil cylinder set and a rear dynamic load loading oil cylinder. Hydraulic loading oil cylinders in the top hydraulic loading oil cylinder set and the side hydraulic loading oil cylinder set can be independently loaded so as to realize simulation of a crushing area, a plastic area and an elastic area; a horizontal dynamic load is independently applied through rear dynamic load loading oil cylinders to simulate the influence of dynamic disasters such as mine earthquakes on the stress and strain of the coal rock mass, so that the credibility of an experimental result is improved; through independent loading of a plurality of hydraulic loading oil cylinders, a drilling cutting experiment and a drilling pressure relief experiment with a coal seam inclination angle can be carried out, the outermost side of a loading cushion block extends to the outside of a sample, and a boundary effect can be effectively avoided during loading so as to reduce experiment errors; and the whole experimental device forms a three-dimensional structure, ground stress is simulated more accurately, and the accuracy of similar simulation experimental results of drilling cuttings and drill hole pressure relief is further improved by adopting a large-size sample.
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Description

technical field

[0001] The invention belongs to the technical field of coal mine safety, in particular to a large-scale three-dimensional detachable drilling cuttings similar simulation experiment device. Background technique

[0002] By drilling small-diameter boreholes into the coal body, according to the change law and dynamic phenomenon of the powder discharge per unit depth during the drilling process, the degree of stress concentration, peak value and position of the coal body can be understood, and the risk level of rock burst can be determined to achieve rock burst. For pressure prediction purposes, the above method is the cuttings method. Because the drilling cuttings method can detect multiple factors related to rock burst at the same time, and is simple and easy to implement, it has become the most widely used method for monitoring the local stress of dynamic disasters in coal mines. The relationship between coal mass and stress is the basis of cuttings method re...

Examples

Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Such as Figure 1~3 As shown, a large-scale three-dimensional detachable drill cuttings similar simulation experiment device includes a detachable reaction frame 1, a top hydraulic loading cylinder group 2, a side hydraulic loading cylinder group 3 and a rear dynamic load loading cylinder 4; The top hydraulic loading cylinder group 2 is arranged on the lower surface of the top plate of the detachable reaction force frame 1, and the top hydraulic loading cylinder group 2 contains nine top hydraulic loading cylinders, and the nine top hydraulic loading cylinders are all set vertically and adopt Matrix uniform distribution method; the side hydraulic loading cylinder group 3 is arranged on the inner surface of the left side plate or the right side plate of the detachable reaction force frame 1, and the side hydraulic loading cylind...