PreprintArticleVersion 1Preserved in Portico This version is not peer-reviewed
Application of Inorganic Solidified Foam to Control the Coexistence of Unusual Methane Emission and Spontaneous Combustion of Coal in the Luwa Coal Mine, China
Version 1
: Received: 1 August 2018 / Approved: 1 August 2018 / Online: 1 August 2018 (12:17:02 CEST)
How to cite:
Tian, Z.; Lu, Y.; Shi, S.; Wu, K.; Ye, Q.; Niu, H. Application of Inorganic Solidified Foam to Control the Coexistence of Unusual Methane Emission and Spontaneous Combustion of Coal in the Luwa Coal Mine, China. Preprints2018, 2018080021. https://doi.org/10.20944/preprints201808.0021.v1
Tian, Z.; Lu, Y.; Shi, S.; Wu, K.; Ye, Q.; Niu, H. Application of Inorganic Solidified Foam to Control the Coexistence of Unusual Methane Emission and Spontaneous Combustion of Coal in the Luwa Coal Mine, China. Preprints 2018, 2018080021. https://doi.org/10.20944/preprints201808.0021.v1
Tian, Z.; Lu, Y.; Shi, S.; Wu, K.; Ye, Q.; Niu, H. Application of Inorganic Solidified Foam to Control the Coexistence of Unusual Methane Emission and Spontaneous Combustion of Coal in the Luwa Coal Mine, China. Preprints2018, 2018080021. https://doi.org/10.20944/preprints201808.0021.v1
APA Style
Tian, Z., Lu, Y., Shi, S., Wu, K., Ye, Q., & Niu, H. (2018). Application of Inorganic Solidified Foam to Control the Coexistence of Unusual Methane Emission and Spontaneous Combustion of Coal in the Luwa Coal Mine, China. Preprints. https://doi.org/10.20944/preprints201808.0021.v1
Chicago/Turabian Style
Tian, Z., Qing Ye and Huiyong Niu. 2018 "Application of Inorganic Solidified Foam to Control the Coexistence of Unusual Methane Emission and Spontaneous Combustion of Coal in the Luwa Coal Mine, China" Preprints. https://doi.org/10.20944/preprints201808.0021.v1
Abstract
Abstract: Unusual methane emission and spontaneous combustion of coal induced by the air leakage are both hazards during mining. The most common practice has been to improve mine safety is sealing the mining fractures. In this paper, the methane and geology, coal spontaneous combustion characteristics and the coexistence of methane emission and spontaneous combustion of coal were analyzed. The preparation system of inorganic solidified foam (ISF) in field applications is studied and the working principle of generating device consists of foam generator and mixer was expounded. The technical plan of site construction is that the foam fluids was injected to respectively seal the mining fractures behind hydraulic supports, the cavities of air return corner, and the fractures nearby the coal pillar. After the foam fluids injection, the two stress values in the coal pillar eventually maintained above 15.5Mpa and 13Mpa, respectively. It indicated that the ISF can enhance the bearing stress ability of the coal pillar by transforming the stress state from two dimensional to three dimensional. The methane concentration in the air return corner and air return roadway declined significantly to 0.63% and 0.25%. The differential pressure inside and outside of the 4301(1) goaf fluctuated between -100pa to 150pa and the concentration of CO and O2 declined to 9ppm and 6%. The CO concentration in the air return corner finally reached a stable level of 6ppm. What that all means, the foam fluids can seal the air leakage and inhibit spontaneous combustion of coal effectively.
Keywords
Methane emission; Spontaneous combustion of coal; Sealing the air leakage; Mining fractures; Inorganic solidified foam
Subject
Engineering, Industrial and Manufacturing Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
