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Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam

A high-outburst coal seam and layer-penetrating technology, which is applied in earthwork drilling, gas discharge, safety devices, etc., can solve the problems of small effective range of single-hole gas drainage, inability to effectively solve gas hazards, and heavy drilling workload. , to achieve the effect of solving the difficulty of coal roadway support, reducing the amount of gas emission, and promoting the value

Inactive Publication Date: 2013-01-30
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The mining of soft and high outburst coal seams is accompanied by a large amount of gas gushing out, which poses a greater threat of outbursts, and the soft coal quality makes it difficult to support coal roadways, which seriously restricts the safe and rapid production of mines.
At present, when the protective layer cannot be exploited, the gas problem in the process of excavating the high outburst coal seam is mainly solved by pre-extracting coal seam gas. However, the conventional gas drainage method has a small effective range of gas drainage in a single hole and a large drilling workload. Moreover, the low extraction efficiency cannot effectively solve the gas hazard in the excavation process
Due to the soft coal quality and high pressure during the coal roadway excavation, roadway maintenance is very difficult, a lot of manpower and material resources are wasted, the progress of the project is affected, and the mining imbalance is caused.

Method used

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  • Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam
  • Method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on soft and high-outburst coal seam

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Embodiment Construction

[0016] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0017] Such as figure 1 As shown, the soft and high outburst coal seam piercing slits of the present invention relieve pressure and increase permeability and fast tunneling method, at first according to the geological information parameters: coal seam thickness, coal seam dip angle α, coal seam direction, gas parameters, hydrological conditions and other in construction There are required parameters, and a detailed implementation plan is formulated. Do a good job in the preparatory work before implementation, and consider dealing with cracks, faults, water and other risk factors. Arrange the bottom pumping roadway 3 along the direction of the working face in the floor rock layer of the coal seam 1, and determine the influence radius of the slot hole through the slotting test; after completion, arrange a drilling site every 6~8m in the bottom pumping 5~7 s...

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Abstract

The invention discloses a method for performing through-going seam cutting, pressure relief, permeability enhancement and quick tunneling on a soft and high-outburst coal seam, and in particular is applied to quick tunneling in a coal seam which is high in outburst danger and a laneway is difficult to support in a coal mine. The method comprises the following steps of: forming a network type fractured net by high-pressure jet flow seam cutting, pressure relief and permeability enhancement technologies, and enhancing an effect of extracting strip-type coal seam gas on a coal laneway subjected to through-going drilling and pre-extraction; and forming a network type filling region by pressing and injecting filling materials, so that the strength and stress distribution of a coal body are improved, the coal laneway is easy to maintain in the tunneling process, a phenomenon that the gas rushes out of a tunneled laneway is avoided, gas accidents are eliminated in the tunneling process, and an aim of safely and quickly tunneling the laneway is fulfilled.

Description

technical field [0001] The invention relates to a rapid excavation method, in particular to a rapid excavation method applicable to soft and high outburst coal seams with strong outburst risks and difficult support coal seams in coal mines. Background technique [0002] The mining of soft and high outburst coal seams is accompanied by a large amount of gas gushing out, and the outburst threat is greater, and the soft coal quality makes it difficult to support coal roadways, which seriously restricts the safe and rapid production of mines. At present, when the protective layer cannot be exploited, the gas problem in the process of excavating the high outburst coal seam is mainly solved by pre-extracting coal seam gas. However, the conventional gas drainage method has a small effective range of gas drainage in a single hole and a large drilling workload. Moreover, the low extraction efficiency cannot effectively solve the gas hazard during the excavation process. Due to the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 林柏泉翟成沈春明张连军高亚斌
Owner CHINA UNIV OF MINING & TECH
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