基于钻孔压水试验的岩层阻渗能力研究

doi:10.13722/j.cnki.jrme.2014.s2.022

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Abstract Water injection test is a particularly useful technique to determine the impermeability of rock stratum. Based on Baodian coal mine，the data of water injection test were obtained and permeability coefficient of floor rock were deduced through high pressure water injection test. Based on the analysis of data，the results show that the curves of permeability coefficient and pressure are provided with a significant segmentation，which is stable before fracturing pressure and shows linear relationship with high regression coefficient after fracturing pressure. The relationship between permeability coefficient and water discharge is close to linear. Results show that if water discharge continue to rise，the permeability coefficient tends to increase；the impermeability of floor rock stratum can be judged by the calculated results of the critical impermeability strength. The result of the impermeability from highest to lowest is mudstone，siltstone，fine sandstone，limestone. The results make a important reference for safety-mining of follow-up working face.

Key words： mining engineering coal seam floor rock stratum water injection test impermeability permeability coefficient critical impermeability strength

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	Articles by authors
	HUANG Zhen1
	JIANG Zhenquan1
	CAO Dingtao2
	LI Ting3

Cite this article:

HUANG Zhen1,JIANG Zhenquan1,CAO Dingtao2, et al. STUDY OF IMPERMEABILITY OF ROCK STRATUM BASED ON WATER INJECTIION TEST[J]. , 2014, 33(S2): 3573-3580.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.022 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/3573

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