Prediction and assessment method for stability of surrounding rocks of mining roadway

A technology of stability prediction and recovery roadway, which is applied in the field of safety prediction and evaluation of the surrounding rock of the mining roadway, and the stability prediction and evaluation of the surrounding rock of the mining roadway. It can solve problems such as the difficulty of clustering conclusions, and achieve the effect of accurate evaluation results

Active Publication Date: 2017-11-17
SHANDONG UNIV OF SCI & TECH +1
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Problems solved by technology

[0004] However, the above-mentioned methods all have different degrees of limitations or inherent deficiencies:
[0012] However, this method has strong subjectivity in determining the index weight and membership degree, and it is difficult to obtain clustering conclusions when the sample size is large

Method used

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  • Prediction and assessment method for stability of surrounding rocks of mining roadway
  • Prediction and assessment method for stability of surrounding rocks of mining roadway
  • Prediction and assessment method for stability of surrounding rocks of mining roadway

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Embodiment

[0135] The surrounding rock stability grades and influencing factors of 88 groups of mining roadways collected from mining area 042 of Bolin Mine, mining area 032 of Bailaping Mine, mining area 112 of Tieshan South Mine, mining area 411 of Diamond Mine and mining area 421 of Binlang Mine As an example, give an example.

[0136] Such as Figure 1 to Figure 5 As shown, the stability grade of the surrounding rock of the mining roadway includes three grades of stable, moderately stable and unstable, which are represented by 1, 2 and 3 respectively. The corresponding influencing factors include the weighted strength of the surrounding rock of the mining roadway σ, the buried depth of the roadway H, The ratio N of the thickness of the immediate roof to the mining height, the width X of the coal pillar of the roadway protection, the ratio K of the coal seam to the height of the roadway, and the initial caving step of the immediate roof L, see Table 1:

[0137] Table 1: The measured ...

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Abstract

The invention discloses a prediction and assessment method for stability of surrounding rocks of a mining roadway. The prediction and assessment method comprises the following steps: inputting measured data of influence factors of surrounding rocks of the mining roadway into a computer; then, retrieving sample data to set up a prediction model of a single kernel function support vector machine; combining selected global kernel functions with local kernel functions to form mixed kernel functions to set up a prediction model of a mixed kernel function support vector machine; utilizing a particle swarm algorithm to optimize penalty factors, kernel parameters and single kernel function coefficients of the predication model to set up a prediction model of a particle swarm algorithm-mixed kernel function support vector machine for stability of surrounding rocks of the mining roadway; and calculating prediction precision and reliability of to-be-predicted samples and assessing the maturity of the model. The prediction and assessment method for stability of surrounding rocks of the mining roadway is easily adopted and scientific. The grade prediction result of stability of surrounding rocks of the mining roadway and the maturity assessment result of the model are accurate and reliable and are highly consistent to the reality.

Description

technical field [0001] The invention relates to a method for predicting and evaluating the safety of the surrounding rock of a mining roadway, in particular to a method for predicting and evaluating the stability of the surrounding rock of a mining roadway, which belongs to the technical field of mine safety. Background technique [0002] Underground coal mining roadway is an important channel for coal transportation, mine ventilation, and pedestrian material transportation. Accurate prediction or evaluation of the stability of the surrounding rock of the mining roadway is the premise and basis for the design of the support scheme. It is related to safe production and is of great significance. In recent years, the research on the prediction method of the surrounding rock stability of the mining roadway has become an important scientific research topic in the field of coal mining safety production technology. [0003] In the prior art, there are many methods for predicting th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘阳石永奎李文莹石佳慧于宁张良良武继胜徐明伟齐敏华王体衡郝建韩超余海鸥丁永禄高姣娇徐旖旎王晓孟
Owner SHANDONG UNIV OF SCI & TECH
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