Gas-containing coal and rock mass loading stress and gas pressure coupling relation determination method
A technology of gas pressure and coupling relationship, which is used in measuring devices, fuel testing, instruments, etc., can solve the problems of inaccurate, unreasonable, and unscientific gas pressure measurement, and achieve the effect of solving inaccurate gas pressure measurement.
Active Publication Date: 2018-07-06
ANHUI UNIV OF SCI & TECH
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Problems solved by technology
[0006] Aiming at the deficiencies of the prior art, the present invention discloses a method for measuring the coupling relationship between the loading stress of the gas-containing coal and rock mass and the gas pressure, which can solve the problem that the existing on-site independent measurement cannot reveal the coupling essence and the gas pressure measurement in the laboratory is inaccurate, unscientific and unreasonable question
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0033] See attached figure 1 The method for determining the coupling relationship between the loading stress of the gas-containing coal rock mass and the gas pressure comprises the following steps:
[0034] In step a, take coal samples with different geological conditions, analyze the characteristics of volume strain change of gas-bearing coal and rock mass, and obtain the loading stress-volume strain curve.
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The invention relates to the technical field of coal mine dynamic disaster prevention and control, in particular to a gas-containing coal and rock mass loading stress and gas pressure coupling relation determination method. The gas-containing coal and rock mass loading stress and gas pressure coupling relation determination method comprises the following steps of performing test and theoretical analysis comprehensive determination for the gas-solid coupling feature of gas-containing coal and rock masses and stress and gas pressure coupling response relation, adopting a triaxial loading test toacquire a loading stress-volumetric strain curve, establishing a loading stress-porosity physical mechanical model and a porosity-gas pressure theoretical model respectively according to the gas-containing coal and rock mass porosity features and a gas desorption and adsorption theory, and further performing reliability verification on a discrimination model to finally acquire a loading stress and gas pressure coupling model. The method provided by the invention can reveal the coupling disaster-causing mechanical essence of the coal seam gas pressure under the control of mine-induced stress,provides a theoretical basis for a coal and gas power disaster prevention and control technology and has wide practicability.
Description
technical field [0001] The invention relates to the technical field of coal mine dynamic disaster prevention and control, in particular to a method for measuring the coupling relationship between gas-containing coal and rock mass loading stress and gas pressure. Background technique [0002] Coal seam mechanical state and gas occurrence state are the main influencing factors of coal and gas dynamic catastrophe, among which coal seam stress and gas pressure are the two most important indexes. Especially in deep mining, after the implementation of comprehensive gas control measures, coal and gas power disaster accidents in low-indicator states occur from time to time, posing a serious threat to production safety. [0003] Affected by the mining stress, the nature of gas-solid coupling disaster-causing evolution in gas-bearing coalbeds is more complex, and coal and gas dynamic disasters are becoming more and more serious. Disaster mechanism is particularly important, and revea...
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IPC IPC(8): G01N33/22
CPCG01N33/222G01N33/227
Inventor 胡祖祥吴胜张毅殷志强唐明云
Owner ANHUI UNIV OF SCI & TECH