Method of treating permeable formations
阅读：52发布：2022-05-18
专利汇可以提供Method of treating permeable formations专利检索，专利查询，专利分析的服务。并且A method is provided for grouting zones of permeable geologic formations to prevent the flow of fluid through the grouted zone. In this method the formation is penetrated by a borehole. A blasting agent is disposed in the borehole contiguous to the zone to be grouted. The blasting agent is detonated to provide fractures in the zone of the formation which extend radially away from the borehole. The fractures are grouted to prevent the flow of fluid through the grouted zone.，下面是Method of treating permeable formations专利的具体信息内容。
1. A method of penetrating a permeable formation at a predetermined location with an opening of a predetermined size which comprises: a. penetrating said formation with at least one treatment borehole which has a diameter substantially smaller than the size of the opening; b. disposing an explosive within said treatment borehole contiguous to the formation, said explosive having sufficient power and brisance and being provided in an amount sufficient to produce multiple fractures extending radially away from the treatment borehole in said formation upon detonation thereof to produce a fractured zone which is larger than the size of the opening; c. detonating the explosive to produce said fractured zone; d. grouting the fractures a sufficient distance to provide a grouted zone larger than the size of said opening; and e. penetrating the grouted zone with said opening.
2. The method as defined in claim 1 wherein the rubble formed in the formation upon the detonation of the explosive is substantially completely removed therefrom prior to grouting fractured zone.
3. The method as defined in claim 1 wherein the opening is a shaft connecting the surface of the ground with an underground passageway.
4. The method as defined in claim 1 wherein the opening is non-vertical.
5. The method as defined in claim 1 wherein said permeable formation is an aquifer.
6. The method as defined in claim 1 wherein the explosive is tamped prior to being detonated.
7. The method as defined in claim 1 wherein the opening is substantially vertical.
8. A method of creating an opening having a predetermined size in a subterranean permeable formation which comprises: a. penetrating the formation with a plurality of treatment boreholes, each borehole having a diamEter substantially smaller than the size of said opening; b. disposing an explosive charge in each borehole contiguous to said formation, said explosive having sufficient power and brisance and being provided in a sufficient amount such that upon detonation of each explosive charge fractures are produced in the formation around each borehole which extend a sufficient distance to intersect and overlap with fractures produced around at least one other treatment borehole, said treatment boreholes being provided in a pattern such that a continuous fractured zone is produced upon detonation of the explosive charges, the size of said zone being larger than the size of said opening; c. detonating the explosive charges to provide said continuous fractured zone in said formation; d. grouting the fractured zone; and e. creating the opening within the grouted zone.
9. The method as defined in claim 8 wherein rubble produced upon the detonation of each explosive charge is substantially completely removed from the treatment boreholes prior to grouting the fractured zone.
10. The method as defined in claim 8 wherein said explosive charges are tamped prior to being detonated.
11. The method as defined in claim 8 wherein said grouting material is cementitious.
12. The method as defined in claim 8 wherein said opening is a shaft extending from the surface of the earth.
13. The method as defined in claim 8 wherein the permeable formation is an aquifer.
14. The method as defined in claim 8 wherein the opening is a shaft to be connected with an underground passageway and each permeable formation located between the surface of the earth and the underground passageway through which the shaft extends is treated as defined by steps (a) through (d) of claim 8, prior to preparing the opening through each permeable formation.
15. The method as defined in claim 14 wherein the permeable formation is an aquifer.
16. The method as defined in claim 8 wherein the opening is non-vertical.
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