公开(公告)号：US11267744B2

公开(公告)日：2022-03-08

申请号：US16462539

申请日：2018-05-30

Applicant: University of Science and Technology Beijing

Inventor： Aixiang Wu ,  Shaoyong Wang ,  Lianfu Zhang ,  Zhuen Ruan ,  Shenghua Yin ,  Hongjiang Wang ,  Yiming Wang

IPC: C02F11/12 ,  C02F11/121 ,  B09B3/00 ,  B09B1/00

Abstract: A gold mine cyanide tailing disposal method is provided. The disposal method performs a harmless decyanation treatment on a cyanide tailing slurry obtained from a mineral processing plant, and then performs a resource treatment where a cyanide tailing slurry is subjected to a thickening to obtain a higher concentration. When a backfill is needed, a paste is produced by adding a cementing material after a homogenized stirring of a two-stage horizontal agitator pumped to an underground mining site for filling by a plunger pump. The cementing material is to solidify an underflow and prevent cyanide from being filtered out. When a backfill is not needed, the paste is directly delivered to an open storage area for storing by the plunger pump.

公开(公告)号：US11773683B1

公开(公告)日：2023-10-03

申请号：US18124587

申请日：2023-03-22

Applicant: NORIN MINING LIMITED ,  University of Science and Technology Beijing

Inventor： Chao Liu ,  Yunpu Qi ,  Zhanglun Song ,  Shuai Zhang ,  Liang Wang ,  Shenghua Yin ,  Fusong Dong ,  Dapeng Chen ,  Leiming Wang

IPC: E21B33/13

CPC classification number: E21B33/13

Abstract: A segmented grouting method for ramp drivage in an aquifer is provided. Concerning grouting reinforcement for a ramp in an aquifer, a grouting process is divided into four stages according to a pressure change, that is, micro-pressure filling, low-pressure diffusion, medium-pressure reinforcement, and high-pressure fracturing. In the micro-pressure filling, an initial pressure of a grouting orifice is 0, and a low-concentration single-component grout is used to fill an original fissure of the aquifer. In the low-pressure diffusion, a low-concentration bicomponent grout is used for grouting, the original fissure is expanded, and a grouting radius is increased. In the medium-pressure reinforcement, a high-concentration bicomponent grout is used for grouting, thereby reinforcing the aquifer. In the high-pressure fracturing, a high-concentration bicomponent grout is used to reinforce a new fractured fissure of the orifice caused by a high pressure and the original fissure, thereby forming a confining bed.