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Drawing test device and method for simulating full-length anchoring quality detection of roadway surrounding rock

A full-length anchoring and pull-out test technology, which is used in measurement devices, preparation of test samples, and testing of material strength by applying stable tension/compression. The application and influence of the reasonable design and effect evaluation of the bolt support, the force transmission mechanism and the deviation of the failure characteristics results, etc., to achieve the effect of high integration, avoidance of human error, and simple test structure

Inactive Publication Date: 2019-01-22
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication No. CN103323336A discloses "a test simulation device capable of testing bolt pullout force and its method", publication number CN205449674U discloses "a pullout force-displacement detection device for laboratory bolt pullout test" and Publication No. CN207248634U discloses "a kind of bolt pullout test device", which does not consider the application of the bolt pretension force and the constraint surrounding rock stress in the anchorage structure, which makes the simplification of the laboratory model inconsistent with the actual situation on the spot, resulting in Deviations in the results of force transmission mechanism and failure characteristics during the bolt pulling process affect the reasonable design and effect evaluation of bolt support

Method used

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  • Drawing test device and method for simulating full-length anchoring quality detection of roadway surrounding rock
  • Drawing test device and method for simulating full-length anchoring quality detection of roadway surrounding rock
  • Drawing test device and method for simulating full-length anchoring quality detection of roadway surrounding rock

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Embodiment 1

[0032]This embodiment provides a pullout test device for simulating the quality detection of the full-length anchorage of the roadway surrounding rock, including a simulated test box, a pullout system, a pressure sensor 1 for monitoring the pullout force during the pullout process of the bolt 101, and a The displacement sensor 2 that monitors the displacement of the anchor rod 101 in the drawing process and the computer system that is connected with the pressure sensor 1 and the displacement sensor 2 respectively through the data transmission wire; The hydraulic cylinder 4 controlled by hydraulic pressure, the surrounding pressure plate 5 and the telescopic spring tube 6 arranged on the movable end of the hydraulic cylinder 4; 3. In addition to being used to hold the cubic rock test block 102, it is also a counter force device; the number of hydraulic cylinders 4 is four, corresponding to the four sides of the cubic rock test block 102, and placed evenly around the cubic rock t...

Embodiment 2

[0047] This embodiment provides a pull-out test method for simulating the full-length anchorage quality detection of the surrounding rock of the roadway, which is implemented based on the pull-out test device for the full-length anchorage quality detection of the simulated roadway surrounding rock described in Example 1, including the following steps:

[0048] S1, put the cubic rock test block 102 prefabricated and maintained in advance into the cubic rock test block placement position in the box body 3, start the electro-hydraulic control switch of the hydraulic cylinder 4, and according to the simplified stress state of the anchor body, surround The pressure plate 5 exerts confining pressure on the cubic rock test block 102 under the push of the hydraulic cylinder 4. The application method is controlled by the stress rate, and the loading rate is between 0.01MPa / s-0.1MPa / s until the preset confining pressure is reached. Then stop, and maintain a steady state;

[0049] S2, th...

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Abstract

The invention provides a drawing test device and method for simulating full-length anchoring quality detection of a roadway surrounding rock, and belongs to the technical field of mining engineering.The drawing test device comprises a simulation test box, a drawing system, a pressure sensor for monitoring a drawing force in an anchor rod drawing process, a displacement sensor for monitoring the displacement in the anchor rod drawing process, and a computer system connected with the pressure sensor and the displacement sensor respectively through data transmission conducting wires; the simulation test box comprises a box body, a hydraulic oil cylinder arranged on an inner wall of the box body and under electrohydraulic control, a confining pressure plate arranged on a movable end head of the hydraulic oil cylinder, and a telescopic spring tube; and the drawing system comprises a hollow jack under the electrohydraulic control, an anchor rod anchorage device matching the hollow jack, and a bearing plate and a saucer provided with center holes. The device can realistically realize the simulation of an in-situ stress field of an anchoring body and the pre-tightening force applicationin an anchor rod mounting process so as to restore the site as much as possible.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a pullout test device and a method for detecting the anchorage quality of the full length of simulated roadway surrounding rock. Background technique [0002] In underground mining activities, the roadway is used as a passage for transportation, ventilation and pedestrians, and the stability control of its surrounding rock is the key to ensuring safe, efficient and green mining in the mine. Anchor bolts have been widely used in the surrounding rock control of coal mine roadways due to their advantages such as low cost, simple operation, and good control effects. [0003] With the continuous extension of underground mining activities, due to the influence of high ground stress and strong mining stress, the surrounding rock of the roadway shows the characteristics of large deformation and serious damage damage, which will inevitably bring about the force of the bolt. If...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/10G01N1/28G01N1/36
CPCG01N1/28G01N1/286G01N1/36G01N3/10G01N2001/364G01N2203/0017G01N2203/0075
Inventor 冯国瑞杜云楼康红普张玉江白锦文王凯杨创前王胜伟杨文博闫永敢
Owner TAIYUAN UNIV OF TECH
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