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Coal mine underground gas extraction drill hole failure judgment method

A technology for gas extraction and extraction drilling, which is applied in the fields of gas discharge, mining equipment, earthwork drilling, etc. The effect of utilization efficiency and refined management technology level

Active Publication Date: 2021-03-09
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a method for judging the failure of borehole gas drainage in coal mines. By constructing a prediction model for gas drainage in boreholes, the dynamic judgment of pre-drainage boreholes in mining face and tunneling face is realized. Targeted measures such as repairing the effectiveness of borehole operation status to solve the problems of long drainage compliance time and unbalanced regional drainage effect caused by failed boreholes

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  • Coal mine underground gas extraction drill hole failure judgment method
  • Coal mine underground gas extraction drill hole failure judgment method
  • Coal mine underground gas extraction drill hole failure judgment method

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Embodiment Construction

[0050] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0051] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a coal mine underground gas extraction drill hole failure judgment method, and belongs to the technical field of coal mine gas extraction. The method comprises the following steps: S11, constructing a borehole gas extraction prediction model by comprehensively controlling coal seam gas parameters, coal and rock stratum environment conditions, extraction borehole parameters, a gas circulation theory and the like of a region; S12, comparing the drilling monitoring data with the prediction simulation result, and judging the drilling operation state; S13, determining a failure drill hole according to the judgment result, and determining a drill hole failure type by utilizing a failure drill hole judgment method; S14, performing drilling repair, coal seam permeability improvement and other technical measures or adjusting extraction drilling engineering parameters according to the drilling failure type, and guiding the drilling extraction of the next area. Accordingto the method, a basis is provided for carrying out technical measures such as failure drilling repair in a targeted mode, the extraction drilling utilization efficiency and the fine management technical level are effectively improved, and it is guaranteed that the coal mine gas extraction effect is smoothly connected with mine extraction.

Description

technical field [0001] The invention belongs to the technical field of gas drainage in coal mines, and relates to a method for judging the failure of boreholes for gas drainage in coal mines. Background technique [0002] Coal seam gas drainage drilling is the main method of underground gas extraction in coal mines, and its effectiveness is directly related to the quality of drainage. For example, in the process of drilling in soft coal rock formations, affected by factors such as coal and rock mass strength, ground stress, and water, the borehole is prone to deformation or even collapse; secondly, the stress changes around the borehole caused by mining activities will cause the borehole The displacement and deformation of the coal and rock mass around the hole will further cause the mining collapse after the hole is drilled in the soft coal and rock strata; in addition, the downward drilling with a large amount of water inflow in the coal and rock strata is prone to water a...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/02E21F7/00
CPCG06Q10/0639G06Q50/02E21F7/00
Inventor 巴全斌刘延保申凯熊伟周厚权杨利平樊正兴马钱钱郝光生范晓刚高振勇王小朋龚国民马凯秦晓强陈宾史永涛王松王一帆鞠坤王士伟何俊李诗华
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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