Engineering rock mass surrounding rock integrity and loose ring testing method
A test method and integrity technology, applied in optical testing flaws/defects, measuring devices, material analysis by optical means, etc., can solve problems such as difficult actual operation, inaccurate test results, and difficulty in determining wave speed, saving manpower , the effect of high accuracy and low inflation pressure
Active Publication Date: 2019-04-19
SHANDONG UNIV OF TECH
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Problems solved by technology
[0003] At present, the testing methods for surrounding rock loose circle mainly include acoustic wave method, multi-point displacement meter method, geological radar method, seismic wave method, resistivity method and penetration method, etc. At present, the acoustic wave test method is mainly used, and the method is divided into single hole method and double hole method. , the main problem is that in the test, it is often necessary to provide wind and water pipes, and the workload is relatively large. Water is used as the coupling medium between the acoustic wave probe and the rock hole wall, and the requirements for water flow, pressure and water quality are high. Difficult to operate, testers are often wet with water, the test process is affected by the coupling medium, resulting in inaccurate test results, and the wave velocity in many cases is also difficult to determine
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[0048] Figure 1~2 It is the best embodiment of the present invention, below in conjunction with attached Figure 1~2 The present invention will be further described.
[0049] Such as figure 1 As shown, a method for testing the integrity of engineering rock mass surrounding rock and loose circles includes the following steps:
[0050] Step 1001, opening and clearing holes at the surrounding rock of the engineering rock mass;
[0051] At the surrounding rock of the engineering rock mass 3, a hole-forming drilling rig is used to carry out construction, and a borehole 11 for forming a test is opened. After the borehole 11 is opened, the hole is cleaned. The diameter of the borehole 11 is greater than 42mm, and the depth of the borehole 11 is greater than 2m.
[0052] Step 1002, putting the airbag testing device into the end of the borehole 11;
[0053] Put the airbag test device into the borehole 11, and put the inner end of the airbag test device at the end of the borehole...
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Abstract
The invention relates to an engineering rock mass surrounding rock integrity and loose ring testing method, which belongs to the technical field of safety detection and monitoring of mining and geotechnical engineering. The method comprises an air bag testing device and the following steps: step 1001, opening of drilling holes; step 1002,putting in the air bag testing device; step 1003,inflating the air bag (5); step 1004,inflating the closed section; step 1005,judging the integrity of the rock mass; step 1006,determining whether the current closed section has been tested; step 1007,determining whether the current drilling (11) is completed; step 1008, testing the next section of the borehole (11); step 1009, carrying out other drilling (11) tests. The testing method of an engineering rockmass surrounding rock integrity and looseness circle has the advantages that the operation is simple, safe and reliable and can protect environment with high economy, accuracy and has wide application.
Description
technical field [0001] The invention discloses a method for testing the integrity and loose circle of surrounding rock of an engineering rock mass, which belongs to the technical field of safety detection and monitoring of mining and geotechnical engineering. Background technique [0002] After the engineering rock mass is excavated, the stress of the surrounding rock will increase. If the concentrated stress in the surrounding rock exceeds its strength, the surrounding rock will be damaged, and there will be a rupture zone, a plastic zone and an elastic zone from the free surface to the deep part of the rock mass. , where the rupture zone is called the surrounding rock loosening zone. The support of the broken surrounding rock is the focus and difficulty of engineering rock mass safety and construction work. Therefore, the test of the surrounding rock loosening zone is particularly important. The support method and parameters and the advance support range of the working fac...
Claims
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Login to View More IPC IPC(8): G01N7/00G01N21/88
CPCG01N7/00G01N21/8851
Inventor 张晓君李晓程宋林波李如峪
Owner SHANDONG UNIV OF TECH