Rapid construction method of high-gas or coal and gas outburst coal seam stope face crossheading

A technology for mining face and gas outburst, applied in gas discharge, mining equipment, ground mining, etc., can solve the problems of large number of people, low driving speed, unbalanced mining, etc., to increase the scope of influence, increase the speed of extraction, and reduce the difficulty Effect

Active Publication Date: 2022-04-15
SHANDONG UNIV OF SCI & TECH +1
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  • Description
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AI Technical Summary

Problems solved by technology

The traditional down-trough excavation technology of high gas or coal and gas outburst coal seam adopts alternate intermittent operation of excavation and support, but due to the low efficiency of gas pre-pumping along the channel of the mining face, the tunneling speed of the coal roadway is low , Many people are employed, and mutual coordination is poor. The national high gas or coal and gas outburst coal seam recovery working face has an average monthly footage of less than 100 meters. The mining imbalance of most mines is serious, which greatly hinders the efficient production of coal mines.

Method used

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  • Rapid construction method of high-gas or coal and gas outburst coal seam stope face crossheading
  • Rapid construction method of high-gas or coal and gas outburst coal seam stope face crossheading
  • Rapid construction method of high-gas or coal and gas outburst coal seam stope face crossheading

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Embodiment 1

[0041] see Figure 1 to Figure 6 , which is a rapid construction method for a high-gas or coal and gas outburst coal seam recovery working face along the channel. In this embodiment, a rapid construction method for a high gas or coal and gas outburst coal seam recovery working face along the channel. The cross-sectional size is 3m Taking a high gas or coal and gas outburst coal seam with ×4m along the channel as an example, the following steps are included:

[0042] S1: Use the universal drill rod adjustment device to cooperate with the drilling rig to construct the grouting drilling 17 along the coal roadway section. After the grouting drilling 17 is constructed, immediately put the hole sealer into the grouting drilling 17 under construction ; Then the grouting pipe 10 is screwed into the hole sealer. The hole sealer body 11 is made of engineering plastics, and the whole is a hollow structure with good elasticity. The inside is provided with connecting threads, and the outer...

Embodiment 2

[0054] In this embodiment, a high gas or coal and gas outburst coal seam with a cross-sectional size of 3m×5m is taken as an example, and the rest are consistent with that of Embodiment 1.

[0055] The present invention provides a rapid construction method for a high-gas or coal-and-gas outburst coal seam recovery working face along the trough, by uniformly constructing several injectors on both sides of the outer contour line of the coal body along the mining working face along the trough on the coal roadway section. After the grout is solidified, the coal body that is to be extended along the trough of the mining face is completely isolated from the two sides, so as to prevent the gas of the two sides of the coal seam from flowing into the mining face along the trough. Extending the flow of the coal body greatly reduces the difficulty of gas drainage in the coal roadway excavation face. Construction and reconstruction of gas drainage boreholes, and the formation of coal cavit...

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Abstract

The invention relates to a rapid construction method for a high-gas or coal and gas outburst coal seam stope face gate road, and belongs to the technical field of coal mine safety. A plurality of grouting drill holes are uniformly constructed in the section of a coal roadway along the two sides of the outer contour line of the stope face gate road, grouting is carried out after rapid plugging is carried out, and after slurry is solidified, grouting is carried out; according to the method, a coal body which is about to extend from a gate road of a stope face is completely isolated from two sides, then extraction drilling holes are constructed and transformed in the extension direction of the gate road, caving is carried out on the extraction drilling holes through a caving device, the influence range of gas extraction is widened, and conventional gas extraction drilling holes are assisted to carry out gas extraction on the coal body; and the gas extraction standard reaching time of the crossheading coal body of the stope face of the high-gas or coal and gas outburst coal seam is shortened. Good space-time conditions are provided for gas extraction of a mine, the construction progress of a high-gas or coal and gas outburst coal seam stope face is accelerated, it is further guaranteed that the mine releases advanced productivity, and the method is an important technical support for constructing a clean, low-carbon, safe and efficient modern energy system.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and relates to a rapid construction method for a down-trough mining face of a high gas or coal and gas outburst coal seam. Background technique [0002] The clean and efficient utilization of coal is the foothold of my country's energy transformation. Coal will surely become an important bridge for my country's energy green and low-carbon transformation, and play an important supporting role in the transformation of the energy structure to new energy as the mainstay. In recent years, with the development of science and technology, more and more advanced mining technology equipment has been put into the coal production link of coal mines, which has greatly improved the intelligent mining level of coal mines and reduced the number of underground coal mine operators , providing important technical support for the high-quality development of my country's coal industry. However, it cannot be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21F7/00
Inventor 程波张志刚王中华
Owner SHANDONG UNIV OF SCI & TECH
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