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Method for determining spontaneous combustion temperature field and combustion depth of slope residual coal

A slope, spontaneous combustion technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to simulate thermal radiation and thermal convection

Active Publication Date: 2015-07-22
HUOLINHE OPENCUT COAL IND CORP LTD OF INNER MOGOLIA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the thermal model of PFC3D cannot simulate thermal radiation and thermal convection

Method used

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  • Method for determining spontaneous combustion temperature field and combustion depth of slope residual coal
  • Method for determining spontaneous combustion temperature field and combustion depth of slope residual coal
  • Method for determining spontaneous combustion temperature field and combustion depth of slope residual coal

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Embodiment Construction

[0042] Haizhou Open-pit Coal Mine is located 3km southeast of Fuxin Station, in the Taiping District in the southern part of Fuxin City. The mine covers an area of ​​26.82km 2 , Of which, the stope is 6km 2 , Dump site and waste dump 14.8km 2 , Industrial Plaza 3.84km 2 , Residential and living facilities 2.18km 2 . The maximum range of the open-pit coal field is W9+50m at the western end, E29+50 at the eastern end, and 3.9km from east to west; the largest boundary at the southern end is S5+00m, the largest boundary at the northern end is N13+00m, and the north-south width is 1.8km. The surface elevation is +165~+200m, with an average of +175m. The terrain is high in the southeast and low in the northwest. The designed mining depth of the open-pit mine is 350m.

[0043] A certain slope is 271m long horizontally (x direction) and 157m high (z direction). The geological conditions are complex. Sandstone, sandy mudstone, sandstone, coal seam, mudstone and sandy shale are distribut...

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Abstract

The invention discloses a method for determining the spontaneous combustion temperature field and the combustion depth of slope residual coal. The method is characterized in that the movement of oxygen in cracks and the process of the reaction of the oxygen and a coal bed and the mutual development promoting of the oxygen and the coal bed are simulated based on PFC3D serving as a simulation platform with the help of a heating power coupling model of the PFC3D and the situation of cracks formed by slope damage caused by spontaneous combustion in earlier periods, and thus the slope internal temperature field and the combustion space area development depth are obtained; extremely small particles are used for simulating the flowing of oxygen and the reaction of the oxygen and the coal, and the process is achieved through FISH; the method comprises the following steps of structuring a slope model, forming an oxygen flow channel, structuring a residual coal spontaneous combustion microscopic model and simulating a temperature field result through heating power. The method can be used for analyzing the spontaneous combustion process of coal piles with certain scales.

Description

Technical field [0001] The invention relates to coal engineering, in particular to determining the internal temperature distribution and the depth of the combustion zone when the residual coal in the side slope of an open-pit mine undergoes spontaneous combustion. Background technique [0002] Residual coal is often present in the slope of open-pit coal mines, which are caused by small reserves and complex mining conditions. According to statistics, the number of spontaneous fires in the nationally distributed coal mines and key coal mines accounted for 94% of the total number of mine fires. Among them, the number of spontaneous fires in the goaf area accounted for 60% of the total number of fires, which is the highest number of underground fires. Serious parts. In the Haizhou open-pit mine, more than 200 fire points have been measured, with about 50 fire points being the main ones. A total of 80 landslides occurred from 1953 to 2008, of which 29 were induced by spontaneous com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 孙宝志李建刚赵景昌崔铁军曹兰柱
Owner HUOLINHE OPENCUT COAL IND CORP LTD OF INNER MOGOLIA
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