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Impact risk warning method on basis of multi-parameter critical coal dust quantity indexes

A pulverized coal volume and multi-parameter technology is applied in the fields of earthwork drilling, electrical digital data processing, and special data processing applications, etc. It can solve problems such as early warning and deviation that cannot impact danger and reliability, and achieve comprehensive early warning parameter indicators and accurate early warning. , The effect of early warning decision-making is clear

Inactive Publication Date: 2015-11-11
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] However, considering the characteristics of bearing pressure distribution, the value of pulverized coal per m at different distances from the coal wall is very different, and there is a large risk of impact risk warning for all deep drilling through only one critical pulverized coal volume early warning index. deviation, unable to provide accurate and reliable early warning of impact hazards

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  • Impact risk warning method on basis of multi-parameter critical coal dust quantity indexes
  • Impact risk warning method on basis of multi-parameter critical coal dust quantity indexes
  • Impact risk warning method on basis of multi-parameter critical coal dust quantity indexes

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Embodiment Construction

[0036] Further illustrate technical scheme of the present invention with concrete example below

[0037] Case Analysis

[0038] Taking the monitoring of drilling cuttings in the third north mining area (deep part) of a certain mine as an example, the analysis is carried out. The average coal thickness of each working face in the third north mining area (deep part) is 7.5m, and six groups of 10m-depth drilling are drilled in non-impact dangerous areas such as the transportation level entry and track entryway of the 3303 and 3304 working faces. According to the early warning method of the present invention, the implementation steps are as follows:

[0039] The first step is to count the weight indicators of all drilled pulverized coal

[0040] The weight of pulverized coal per m during the drilling process of all boreholes is statistically summarized, and the 1m section is not used as a monitoring index, as listed in Table 2.

[0041] Table 2 Summary of Borehole Pulverized Co...

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Abstract

The invention discloses an impact risk warning method on the basis of multi-parameter critical coal dust quantity indexes. The impact risk warning method includes drilling 2-3 groups of drilled holes in to-be-warned working regions, recording the weight of drilled coal dust in each meter of each hole, counting the weight of the coal dust with the particle diameter larger than 3mm in each meter of each hole and counting weight proportion of the coal dust with the particle diameter larger than 3mm in each meter of each hole; analyzing coal dust quantity values obtained by means of recording and computing, comparing the coal dust quantity values to critical coal dust quantity values, and predicting whether impact risk warning needs to be carried out on the regions or not according to four warning decisions including dynamic phenomenon records, general critical coal dust quantity analysis, segmented critical coal dust quantity analysis on the drilled holes and coal dust particle size analysis. The impact risk warning method has the advantage that impact risks can be accurately and reliably warned by the aid of the step-by-step warning method.

Description

technical field [0001] The invention belongs to the field of mining engineering, and in particular relates to a method for early warning of impact danger by using the cuttings method. Background technique [0002] When coal mines are mined to a certain depth, affected by geological structure, ground stress and mining, the possibility of rock burst disasters in the working face increases greatly. In the field of mining engineering, the basic method of on-site prediction and prediction of rock burst disasters at home and abroad is the drilling cuttings method. The drilling cuttings method is a method to identify the impact risk by drilling a hole with a diameter of 42-50mm in the coal seam, according to the amount of pulverized coal discharged and its changing law and related dynamic effects. [0003] Fushun Mining Bureau, Fuxin Mining Institute, and Longfeng Mine Rockburst Research Group of Fushun Mining Bureau published the article "Research and Application of Drilling Cutt...

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Application Information

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IPC IPC(8): E21B49/00G06F19/00
Inventor 顾士坦李文帅肖治民胡成成
Owner SHANDONG UNIV OF SCI & TECH
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