A coal mine earthquake risk assessment method

A technology for risk assessment and mine earthquake, applied in mining equipment, earthwork drilling, mining equipment, etc. The effect of eliminating rock burst disasters and ensuring safe production

Active Publication Date: 2022-06-17
CHINA UNIV OF MINING & TECH +1
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Problems solved by technology

[0003] In addition to the possibility of rock burst disasters caused by mining earthquakes, frequent mine earthquakes will also have an adverse effect on the health of underground workers. In addition, in the mining process of some shallow-buried deep mines, mine earthquakes that occur underground may also cause surface damage. Some strong mining earthquakes even caused damage to surface structures, and the risk of disasters caused by mining earthquakes has become increasingly prominent

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  • A coal mine earthquake risk assessment method
  • A coal mine earthquake risk assessment method
  • A coal mine earthquake risk assessment method

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Embodiment Construction

[0038] The working face of a mine has a buried depth of about 380m, an inclined length of 255m, and a propulsion length of 1256m. figure 2 As shown, the top coal mining is adopted, the mining and caving height is 27m, the uniaxial compressive strength of the roof rock is 22.8MPa, the uniaxial tensile strength is 3MPa, and the elastic modulus is 9GPa. The mine shock risk during the advancement of this face needs to be assessed.

[0039] Table 1 Drilling column in a certain working face

[0040] Rock formation number lithology Buried depth of rock floor (m) Layer thickness h(m) Distance from coal seam d(m) / 6 coal bottom 519.19 / / / 6 coal top 492.19 27.00 / 1 coarse sandstone 487.89 4.10 4.30 2 coarse sandstone 475.57 6.60 16.62 3 coarse sandstone 459.82 7.24 32.37 4 coarse sandstone 444.45 25.41 47.74 5 coarse sandstone 412.42 5.14 79.77 6 fine sandstone 387.55 21.28 104.64 7 coa...

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Abstract

The invention relates to the field of mine earthquake risk assessment in the coal mining process, in particular to an assessment method for assessing the mine earthquake risk caused by the breaking of the overlying rock key layer in the coal mining process, comprising the following steps: calculating the theoretical breaking step of the key layer and releasing energy ;Evaluate whether the key layer can be broken;Evaluate the intensity of the mine earthquake caused by the break of the key layer;Evaluate the potential impact of the mine earthquake on the surface;Evaluate the potential impact of the mine earthquake on the underground. This method provides mines with a scientific means of assessing mining earthquake risk, which can effectively identify mining earthquake risk sources and risk levels, and then formulate targeted mine earthquake disaster prevention and control measures to minimize mine earthquake risk and weaken or even eliminate mine earthquake-induced risks. Rockburst disasters to ensure safe production in mines.

Description

technical field [0001] The invention relates to the field of mine earthquake risk assessment in a coal mining process, in particular to an evaluation method for assessing the mine earthquake risk caused by the rupture of a key layer of an overlying rock in the coal mining process. Background technique [0002] Coal is an important guarantee for my country's energy security. The rock burst disaster will instantly destroy the tunnel equipment, cause casualties, and induce secondary disasters such as outbursts and gas explosions. It is one of the most serious disasters in coal mines. As of 2020, there are 123 high-risk rockburst mines in my country, and the production capacity of such mines accounts for more than 10% of my country's total coal production capacity. As the depth of coal mining increases, the rockburst disaster situation will become more severe. The prevention and control of rock burst is a worldwide problem that needs to be solved urgently. Mine shock is a vibr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/18E21F17/00
CPCE21F17/18E21F17/00
Inventor 曹安业李振雷窦林名宋大钊王桂峰何学秋巩思园彭雨杰
Owner CHINA UNIV OF MINING & TECH
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