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Early warning method of spontaneous fire in coal mining face based on graded composite index system

A technology of coal mining face and spontaneous ignition, which is applied in the direction of fire alarms, analytical materials, and instruments that rely on the effect of smoke/gas, can solve problems such as low accuracy and achieve effective and reliable results.

Active Publication Date: 2020-10-16
CHINA SHENHUA ENERGY CO LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the accuracy of early warning of coal spontaneous combustion in the coal mining face is low in the prior art, and then a method for early warning of spontaneous combustion by using a hierarchical composite index system suitable for coal mining work is provided.

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  • Early warning method of spontaneous fire in coal mining face based on graded composite index system
  • Early warning method of spontaneous fire in coal mining face based on graded composite index system
  • Early warning method of spontaneous fire in coal mining face based on graded composite index system

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[0035] In the following, the technical solutions in the present invention will be described with examples in conjunction with the accompanying drawings in this embodiment. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the simplified description of the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation, use a specific orientation construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Wherein, the terms "...

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Abstract

The invention provides a method for prewarning spontaneous ignition of a coal mining face in a hierarchical composite index system. CO critical reference values at a goaf oxidation zone, a return aircorner and a return air flow are acquired from test data, and CO contents at the goaf oxidation zone, the air return corner and the return air flow are also obtained through actual measurement as theCO critical reference values, so that equivalently, through combination of on-site actual measurement results and the test measurement results, the CO critical values for spontaneous ignition at the goaf oxidation zone and at the return air corner are determined; thereafter, prewarning levels are further obtained in combination with the presence condition of C2H4 and C2H2 gas in a goaf. Accordingto the scheme provided by the invention, the CO critical values can be obtained through comprehensive consideration of the on-site measurement results and the test results, and prewarning levels are reasonably divided and forecasted in combination with different gases, so that a theoretical and application basis is accurately provided for prewarning of the spontaneous ignition of the coal mining face; the method is effective and reliable.

Description

technical field [0001] The invention relates to a method for early warning of spontaneous fire in coal mines, in particular to a method for early warning of spontaneous fire in coal mining face with a hierarchical composite index system. Background technique [0002] Spontaneous combustion of coal is one of the main causes of coal mine fires. Coal mine fires not only cause a serious waste of coal resources, but also threaten the personal safety of underground workers. Coal spontaneous combustion forecasting is to judge spontaneous combustion, predict and infer the development trend of spontaneous combustion based on the signs and observations that occur during the coal spontaneous combustion process. , in order to take effective fire prevention measures in time to avoid the loss of resources, equipment and even life, and ensure safe production. The coal spontaneous combustion prediction technology is mainly the marker gas analysis method. This technology refers to the tempe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G08B17/10
CPCG01N33/0065G08B17/10
Inventor 李东宋双林杨波梁运涛张光德周勇陈庆丰
Owner CHINA SHENHUA ENERGY CO LTD
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