A double structural plane direct shear test method for studying the mechanism of sliding rockburst
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A test method and structural surface technology, applied in the field of rock mechanics, can solve problems such as failure to reflect the conditions of rockburst occurrence, and achieve the effect of a reliable test method
Active Publication Date: 2018-10-23
NORTHEASTERN UNIV LIAONING
View PDF4 Cites 2 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, in real rock mass, structural planes often do not exist alone, especially in high-stress conditions, where structural planes are tightly occluded to generate huge shear resistance. The possibility of severe rockbursts due to fracture instability is greatly increased, and the commonly used single structural plane direct shear test method cannot reflect the occurrence conditions of such rockbursts
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0034] The double structural plane direct shear test method for studying the mechanism of sliding rockburst is adopted for granite, including the following steps:
[0035] Step 1: making the granite into a rock sample with a square section, the size of which is 100mm×100mm×140mm (length×width×height);
[0036] Step 2: Sequentially generate double parallel structural planes on the granite sample under Brazilian splitting conditions, with a distance of 40 mm between the structural planes. At this time, the granite sample is divided into three pieces with thicknesses of 50 mm, 40 mm, and 50 mm, respectively, as figure 1 shown;
[0037] Step 3: Carry out 3D scanning on the double-parallel structural planes respectively to obtain a three-dimensional digital model of the double-parallel structural planes, figure 2 A 3D digital model of the upper structural face of the double parallel structural face is provided, in figure 2 Cut 10 section lines at equal intervals along the shear...
Embodiment 2
[0051] The double structural plane direct shear test method for studying the mechanism of sliding rockburst is adopted for granite, including the following steps:
[0052] Step 1: Make the granite into a rock sample with a square section, the size is 100mm×100mm×140mm (length*width*height);
[0053] Step 2: Sequentially generate double parallel structural planes on the granite sample under Brazilian splitting conditions, with a distance of 40 mm between the structural planes. At this time, the granite sample is divided into three pieces, with thicknesses of 50 mm, 40 mm, and 50 mm;
[0054] Step 3: Carry out 3D scanning on the double-parallel structural planes respectively to obtain a three-dimensional digital model of the double-parallel structural planes, Figure 10 A 3D digital model of the upper structural face of the double parallel structural face is provided, in Figure 10 Cut 10 section lines at equal intervals along the shearing direction, the interval between sectio...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
shear strength
aaaaa
aaaaa
shear strength
aaaaa
aaaaa
Login to view more
Abstract
The invention provides a double-structural surface direct shear test method for researching sliding type rockburst mechanism. The method comprises the following steps: manufacturing a rock sample with a square cross section; successively forming double parallel structural surface by the rock sample under a brazilian split condition; performing 3D scanning on the double parallel structural surface, thereby acquiring a three-dimensional digital model of the double parallel structural surface and calculating roughness thereof; putting the rock sample onto a shear tester, mounting an acoustic emission monitoring probe on the bottom lateral surface, and performing direct shear test on the sample under normal stress condition while monitoring an acoustic emission signal of the rock test piece; collecting the shearing time, shearing stress, shearing displacement and acoustic emission signal data in the shear test process; accordingly analyzing the sliding type rockburst mechanism of the rock sample. According to the invention, a simplified rock system with mutual effect and mutual influence of structural surface and rock is constructed in a laboratory, so that a more reliable test method can be supplied for researching, early warning for and forecasting the sliding type rockburst mechanism.
Description
technical field [0001] The invention belongs to the technical field of rock mechanics, and in particular relates to a double structural plane direct shear test method for studying the mechanism of sliding rockburst. Background technique [0002] Worldwide, with the continuous expansion of rock engineering such as mining, hydraulic power, transportation, nuclear waste disposal, and military defense, the in-situ stress is gradually increasing, and the problem of rockbursts has become increasingly prominent. Generally speaking, rockburst is a dynamic failure phenomenon of surrounding rock caused by excavation and unloading of underground engineering rock mass under high ground stress state of hard rock. The occurrence of rockburst disasters affects the progress of the project, increases the cost of the project, and even causes catastrophic consequences such as equipment damage and casualties. [0003] Engineering practice shows that the shear slip of structural planes may indu...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more