Patent ID: 8979210
Filing Date: 2015-03-17
Classification: E21B

Abstract:
1. A liquid collection process with liquid guiding holes for in-situ leaching an ore body to extract rare earth elements, characterized in that said process includes: 1) forming liquid collection channels in the ore body; 2) forming a plurality of liquid guiding holes with a slope or gradient of 1-2° close to a bottom of each liquid collection channel on both sides of the liquid collection channel, so that a mother liquid drainage and collection network is formed by the liquid collection channel and its liquid guiding holes; 3) forming blocking walls inside and along the liquid collection channel, in which a lower part of each blocking wall communicates with a channel outlet by means of a conduit, and the conduit is controlled with a ball valve switch at the outlet; and 4) adjusting pressure inside the liquid collection channel by means of the ball valve switch, so as to obtain a pressure gradient between the ore body above the mother liquid drainage and collection network and the mother liquid drainage and collection network itself, so that a multi-channel mother liquid collection system is finally formed, wherein a non-mineral liquid is driven to infiltrate downward into each liquid collection channel and its liquid guiding holes, the mother liquid drainage and collection network works only after a mother liquid is formed.