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Subsidence Investigations over Salt-Solution Mines, Hutchinson, Kansas.

PB87139408

Publication Date	1986
Personal Author	Dyni, R. C.
Page Count	30
Abstract	The Bureau of Mines in cooperation with the Solution Mining Research Institute conducted surface and subsurface investigations over five solution-mined salt cavities in the Hutchinson, KS, area. The purpose of these investigations was to determine the mechanisms that lead to the formation of sinkholes above collapsed solution cavities. Of the five salt-solution cavities investigated, four had collapsed and produced sinkholes prior to the time of the investigations; the fifth cavity was considered stable. Exploratory drilling and coring operations were conducted at all five sites; surface stability monitoring was conducted at three of them. The results of these studies indicate that excessive dissolution at the salt-shale contact of each collapsed cavity produced large, unsupported roof spans that ultimately exceeded the structural integrity of the overburden.
Keywords	Subsidence Subsurface investigations Rock salt deposits Hutchinson(Kansas) Solution mining Sinkholes
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Denver, CO. Denver Research Center.
Supplemental Notes	Library of Congress catalog card no. 86-600096.
Document Type	Technical Report
Title Note	Information circular/1986.
NTIS Issue Number	198708

Subsidence Investigations over Salt-Solution Mines, Hutchinson, Kansas.

Subsidence Investigations over Salt-Solution Mines, Hutchinson, Kansas.
PB87139408

Publication Date	1986
Personal Author	Dyni, R. C.
Page Count	30
Abstract	The Bureau of Mines in cooperation with the Solution Mining Research Institute conducted surface and subsurface investigations over five solution-mined salt cavities in the Hutchinson, KS, area. The purpose of these investigations was to determine the mechanisms that lead to the formation of sinkholes above collapsed solution cavities. Of the five salt-solution cavities investigated, four had collapsed and produced sinkholes prior to the time of the investigations; the fifth cavity was considered stable. Exploratory drilling and coring operations were conducted at all five sites; surface stability monitoring was conducted at three of them. The results of these studies indicate that excessive dissolution at the salt-shale contact of each collapsed cavity produced large, unsupported roof spans that ultimately exceeded the structural integrity of the overburden.
Keywords	Subsidence Subsurface investigations Rock salt deposits Hutchinson(Kansas) Solution mining Sinkholes
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Denver, CO. Denver Research Center.
Supplemental Notes	Library of Congress catalog card no. 86-600096.
Document Type	Technical Report
Title Note	Information circular/1986.
NTIS Issue Number	198708