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Outburst prevention technique for multiple heading in coal mine

A process and outburst prevention technology, which is applied in the field of outburst prevention technology for multi-lane excavation in coal mines, can solve the problems of single outburst prevention measures and low efficiency, and achieve the effects of saving time for local outburst prevention measures and improving production efficiency

Active Publication Date: 2010-06-23
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a coal mine multi-lane excavation anti-outburst process in order to solve the problem of single outburst prevention measures and low efficiency in the existing roadway excavation working face

Method used

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  • Outburst prevention technique for multiple heading in coal mine
  • Outburst prevention technique for multiple heading in coal mine
  • Outburst prevention technique for multiple heading in coal mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] First introduce the specific implementation of the anti-burst process at this stage

[0009] (1) Prediction of outburst hazards in coal roadway excavation face

[0010] Using the drill cuttings index method to predict the outburst risk of coal roadway excavation face, follow the steps below:

[0011] (1) Three predictive boreholes with a diameter of 42mm and a depth of 10m are horizontally arranged in the soft layer of the working face section, one borehole is located in the middle of the working face, parallel to the direction of roadway excavation, and the other two boreholes are arranged on the side of the roadway , the opening is 0.5m away from the side of the roadway, the final hole is 3m outside the outline of the roadway, and the angle between the roadway and the roadway is 21 degrees. When there is no soft delamination, the drilling is arranged in the center of the working face.

[0012] (2) For every 1m of drilling, collect and measure the amount of cuttings (...

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Abstract

The invention relates to a coal roadway heading technology, in particular to an outburst prevention technique for the multiple heading in a coal mine, which solves the problems of unitary outburst prevention measure and low efficiency for the heading working surface of the prior roadway. The technique comprises the following steps: firstly, performing long-distance perforation in front of the working surface to drain gas, predicating the outburst danger of the working surface, executing outburst prevention measures, testing the effect after the outburst prevention measures are implemented, and finally adopting corresponding safety measures to perform heading construction. Compared with the prior art, a measure of long-distance perforation for gas drainage is added before predication, thereby greatly reducing the gas content in the coal ahead of the heading position and the corresponding ground stress, reducing the times of outburst predication index over-standard while reducing the outburst danger of the working surface, saving the time for adopting a local outburst prevention measure, ensuring the fast-pace production of the heading working surface, and improving the production efficiency.

Description

technical field [0001] The invention relates to a coal mine roadway excavation technology, in particular to a coal mine multi-lane excavation anti-outburst technology. Background technique [0002] Among all coal mine gas disaster accidents, 75% occur in the tunneling face, and the prevention and control of gas disasters in the tunneling face is the focus of the entire coal mine gas control work. Therefore, how to prevent the gas from protruding during the excavation process has become the top priority of the work. At present, the outburst prevention measures implemented in general high-gas mining areas use a single lane as a outburst prevention unit to implement a "four-in-one" outburst prevention process. The steps of this process are: prediction of the outburst risk of the working face (also called For sampling and testing), implementation of measures to prevent outbursts (drilling 13-meter discharge holes), effect inspection after measures to prevent outbursts, and safe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21F7/00
Inventor 王平虎徐玉胜薛军政赵彬冯强曹国华郭泽波
Owner SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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