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Early warning method of rock burst in roadway with material instability based on the critical state of bulge

A technology of rock burst and critical state, applied in earth-moving drilling, mining equipment, mining equipment, etc., can solve the problems of frequent burst accidents, many influencing factors, complex rock burst mechanism, etc., to ensure safe production, The effect of reducing impact accidents

Active Publication Date: 2020-11-10
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology

[0004]However, due to the complex mechanism of rock burst and numerous influencing factors, the understanding of the occurrence and prevention mechanism of material instability rock burst is still not specific enough. The guidance on site engineering is limited, resulting in frequent impact accidents, which seriously threaten the safe production of mines

Method used

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  • Early warning method of rock burst in roadway with material instability based on the critical state of bulge
  • Early warning method of rock burst in roadway with material instability based on the critical state of bulge
  • Early warning method of rock burst in roadway with material instability based on the critical state of bulge

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Embodiment Construction

[0055] Such as figure 1 As shown, a kind of early warning method of material instability type roadway rock burst based on the critical state of swelling amount provided by the present invention comprises steps:

[0056] S1: Establish a calculation model for the critical value of bulging volume of roadway rock burst;

[0057] S2: Collect the parameters of the roadway coal body to be judged, and bring it into the calculation model of the critical value of the bulging amount, and calculate the critical value of the bulging amount of the rock burst of the roadway to be judged; the rock burst of the roadway referred to in this application refers to the material instability type For rock burst, the roadway referred to in this application is a rectangular roadway, which will not be described in detail later.

[0058] S3: Collect the actual bulging amount of the coal body in the roadway to be judged, compare the actual bulging amount with the calculated critical value of the bulging ...

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Abstract

The invention provides an early warning method of material instability type roadway rock burst based on bulging amount critical state, which comprises the following steps of: S1, establishing a calculation model of the critical value of the bulging amount of the roadway rock burst; S2, collecting the parameters of the roadway to be judged, bringing the parameters into the calculation model of thecritical value of the bulging amount, and calculating to obtain the critical value of the bulging amount of the rock burst of the roadway to be judged; S3, collecting the actual bulging amount of thesurrounding rock of the roadway to be judged, comparing the actual bulging amount with the calculated critical value of the bulging amount, and carrying out early warning on the rock burst of the roadway according to the comparison result; according to the method, the critical state of the roadway material instability type rock burst can be characterized by calculating the maximum elastic bulgingamount, the calculated maximum elastic bulging amount is used as a threshold value for early warning and judging the roadway rock burst, the roadway rock burst triggering can be accurately and quicklycarried out for early warning, the method can be widely applied to field engineering guidance, the occurrence of impact accidents is avoided or reduced, and the safe production of mines is ensured.

Description

technical field [0001] The invention relates to the technical field of underground safety prediction in coal mines, in particular to an early warning method for rock burst in a material-unstable roadway based on a critical state of swelling amount. Background technique [0002] The problem of rock burst is a prominent problem in the field of mining and rock engineering. With the increase of mining depth and mining intensity in my country, coal mine rock burst is becoming more and more serious and complex. Therefore, the mechanism of rock burst is studied to reveal its The occurrence process is of great significance to the safe and efficient production of coal mines in my country. Rock burst is a complex dynamic phenomenon in mines. Scholars from various countries have proposed a series of rock burst triggering theories, including strength theory, stiffness theory, energy theory, shock tendency theory, "three criteria" theory, "three factors " theory, instability theory, dyna...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/18
Inventor 孙中光郭江涛孟小红苟怡赵光绪张金豪赵庆川何青松贺奎张加易郑芳菲薛宗杰常利铭任高建
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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