Study of Sealing Technology of Downward & Permeable Borehole

Abstract:

In gas prediction and prevention , it is important for the Mine-managers to know coal-seam gas-pressure. Because of the limitation of geological conditions,some seam can not use upward bore to measure gas pressure,so using downward bore is essential, but coal-seam gas-pressure measure is difficult on the this condition(QixiangYu. 1992) . In order to resolve this problem, the way of “subsection and time-sharing hole sealing” is propounded in this paper.by using this method, the crevice water of wall rock is blockaded effectively and the influence of measure gas pressure by crevice water is avoided. It can provide guarantee to measure gas pressure under the complicated condition.By the local practice,good effect is achieved.

• Periodical: Advanced Materials Research (Volumes 524-527)
• Pages: 351-354
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.524-527.351
• Online since: May 2012
• Authors: Zu Xiang Hu
• Keywords: Fracture Water, Gas Pressure, Hole Sealing

References

[1] QixiangYu. Mine gas prevention [M].The Publishing House of China University of Mining and Technology (1992) ,pp.208-210

[2] ShuJianHe. New technique of mensurating seam gas pressure [J],Ground Pressure and Strata Control(2003).

[3] QunShanYang etc, New technology applied to rapid measure seam gas pressure in mine construction shaft [J],Coal Engineering(2007).

[4] ChunGuangWang, Polyurethane application in measurement of gas pressure at the seam [J], Safety in Coal Mines(2007).

[5] RuiLingZhang etc, Test gas pressure sealing process in the waterConditions Rock [J], Safety in Coal Mines(2008).

[6] SanJunLiu etc, Gas pressure measurement technology in moisture content of coalseam [J], China Safety Science Journal (2010).