Method for realizing fast coal exposing of coal seam rock cross with outburst danger

A coal seam and dangerous technology, applied in the field of rapid coal excavation, can solve the problems of slow coal excavation in Shimen, affecting the progress of the project, wasting manpower and material resources, etc. Effect

Inactive Publication Date: 2009-12-09
CHINA UNIV OF MINING & TECH
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  • Abstract
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Problems solved by technology

However, engineering practice shows that under the protection of these methods, the speed of unearthing coal in Shimen is still very slow, which is one of the most dangerous operating processes, which wastes a lot of manpower and materia

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  • Method for realizing fast coal exposing of coal seam rock cross with outburst danger
  • Method for realizing fast coal exposing of coal seam rock cross with outburst danger

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the embodiment in the accompanying drawings:

[0017] The method for quickly uncovering coal in the stone gate of the prominent dangerous coal seam of the present invention, according to the investigation of geological parameters: coal seam thickness, inclination, direction, gas parameters, hydrological conditions, roadway direction, size and other parameters required during construction, formulates a detailed coal removal plan . Do a good job of preparations before uncovering the coal, and reasonably deal with crack gas, water and other risk factors at the coal uncovering point. When the excavated roadway 1 is about 10m away from the coal seam 4, the above parameters of the coal seam are further measured, and the drill holes are arranged to drain or discharge the gas within 8m of the head of the roadway and its surroundings, and according to the lithology and gas parameters of the coal seam, dete...

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Abstract

The invention relates to a method for realizing fast coal exposing of coal seam rock cross with outburst danger and is particularly applied to the fast exposing of the coal seam rock cross with extreme outburst danger in a coal mine. According to the method, a strong-weak-strong protective structure is formed by making a reinforcing ring of certain thickness and a weak ring with the thickness equal to or twice that of the reinforcing ring around rock cross, wherein the weak ring can effectively absorb the energy generated due to the release of deep crustal stress during coal exposing and the energy absorption rate can reach 50 to 90 percent, thereby effectively cushioning the impact on the periphery of a laneway and reducing the original crustal stress around the laneway by 40 to 90 percent, while the reinforcing ring just resists the extrusion and impact on the laneway caused by residual stress during coal exposing to ensure safety. The method can reduce extrusion-eliminating quantities by 20 to 30 percent on the premise of ensuring safety; moreover, the method reduces gas pumping time, shortens construction period and increases the speed of the safe coal exposing by 20 to 50 percent.

Description

technical field [0001] The invention relates to a method for quickly uncovering coal from a stone door in an outburst dangerous coal seam, and is especially suitable for quickly uncovering coal in a coal mine with a strong outburst dangerous stone door. Background technique [0002] Outbursts are most likely to occur when coal is uncovered in Shimen mines, and large-scale outbursts in all mining areas basically occur at this time, which seriously restricts the safe and rapid production of mines. At present, the coal-excavation methods in Shimen with outstanding risks mainly include hydraulic punching, hydraulic cutting, metal skeleton, etc., but these measures only play a role in weakening or strengthening the coal-rock mass at the coal-excavation point, forming a single protective structure , and did not release the deep ground stress, nor can it block or buffer the impact energy generated by the release process on the roadway and the impact. At the moment of uncovering th...

Claims

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Application Information

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IPC IPC(8): E21F7/00
Inventor 林柏泉吴海进杨威翟成
Owner CHINA UNIV OF MINING & TECH
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