Heading face coal seal water-infusion technology and application thereof

A water injection technology for tunneling working face and coal seam, which is applied in shaft equipment, mining equipment, earthwork drilling and mining, etc. It can solve problems such as inability to obtain good dust suppression effect, achieve the effect of eliminating dust generation and reducing dust rate

A water injection technology for tunneling working face and coal seam, which is applied in shaft equipment, mining equipment, earthwork drilling and mining, etc. It can solve problems such as inability to obtain good dust suppression effect, achieve the effect of eliminating dust generation and reducing dust rate

CN1975111AInactive Publication Date: 2007-06-06高建顺 +2
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Water injection in the coal seam to reduce dust in the blasting working face. Taking 7 blasting working faces in Xiezhuang Coal Mine of Xinwen Mining Group as the test site, using wind coal drill and Φ42mm drill bit for wet drilling operation, the depth of the water injection hole is 1.8m Left and right, according to the thickness of the coal seam, the number of water injection holes in each blasting face is 2-3. Use a Φ38mm×600mm hole sealer to seal the hole, and use the dust-proof water pipe at the construction site for high-pressure water injection.

[0019] In the water injection project, blastholes are drilled on the coal seam, and the water injection is not stopped before the blasting. The water injection time is determined according to the water injection volume, which is generally about 4 hours according to the calculation, which can increase the water content of the coal seam in the blasting face by 1%. The dust concentration was detected after blast...

Embodiment 2

[0022] Example 2 Coal seam water injection and dust reduction in the fully mechanized excavation working face. Taking the 2 fully mechanized excavation machine excavation working faces of Xiezhuang Coal Mine of Xinwen Mining Group as the test site, after the advanced support is done, the pneumatic drill is used with a Φ42mm drill bit for wet drilling. The depth of the water injection holes drilled is about 2.8m. According to the thickness of the coal seam, the number of water injection holes in the fully mechanized excavation face is 2 and 3 respectively. Use a Φ38mm×600mm hole sealer to seal the hole, and use the dust-proof water pipe at the construction site for high-pressure water injection.

[0023] After the water injection operation starts, other operation procedures are carried out until the fully mechanized excavator starts to cut coal. The water injection time is generally about 4 hours, which can increase the water content of the coal seam on the working face by about...

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Abstract

The present invention relates to a driving face coal seam water injection process and its application. Said water injection process includes the following steps: (1), before driving work adopting pneumatic drill or pneumatic coal drill to drill 2-3 holes in the driving face coal seam, the depth of water injection hole is 1.5-3.0 m; and (2), utilizing hole-sealing device to seal water injection hole and utilizing dust-resisting pressure water pipe of driving face construction point to make high-pressure water injection so as to make driving coal seam water content be increased by more than 1%.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a coal seam water injection mining process and its application in coal mine mining. Background technique [0002] During the mining process of coal mines, the coal mining face produces a large amount of dust. Both at home and abroad, the coal mining face is sprayed to reduce dust, which has played a very good dust reduction effect. However, the amount of dust produced in the excavation face is very large, and the dust concentration in the air of the excavation face can reach 300-500mg / m3 during the blasting operation without dust prevention measures. 3 , when the fully mechanized excavator cuts coal, the dust concentration in the air of the excavation working face is higher, reaching 1000-2000mg / m 3 . In this regard, after a lot of research at home and abroad, many measures and equipment for dust reduction operations for the generated dust have been propose...

Claims

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Application Information

Patent Timeline
06 Jun 2007
Publication
CN1975111A
IPC
E21D5/02
Inventors
高建顺; 李伟