Method for preventing landslides induced by inappropriate liquid injection intensity in in-situ leaching mining

[0015] The present invention will be further described below in conjunction with the accompanying drawings. The protection scope of the present invention is not limited to the following:

[0016] Such as figure 1 As shown, a method for preventing landslides caused by improper liquid injection intensity in in-situ leaching mining uses a liquid injection device to inject the medicament for extracting ionic rare earths into the ore body. The liquid injection device consists of the upper layer The mold bag 1, the lower mold bag 2, the anchor rod 3, the liquid injection pipe 4, the grouting pipe I5 and the grouting pipe II6 are composed. The upper mold bag 1 is sleeved at the upper end of the anchor rod 3, and the lower mold bag 2 is sleeved At the lower end of the anchor rod 3, the grouting pipe I5 is inserted into the upper mold bag 1 from the top of the upper mold bag 1, and the cylindrical surface of the grouting pipe I5 is provided with a plurality of grouting holes communicating with the inner cavity of the upper mold bag 1 The said grouting pipe II6 penetrates the upper mold bag 1 from the top of the upper mold bag 1 and is inserted into the lower mold bag 2. The cylindrical surface of the grouting pipe II6 is provided with a plurality of grouting communicating with the inner cavity of the lower mold bag 2 The liquid injection pipe 4 is set through the upper mold bag 1 from the top of the upper mold bag 1, and the liquid outlet of the liquid injection pipe 4 is set between the upper mold bag 1 and the lower mold bag 2. The prevention is in the original The method for inducing landslides due to improper liquid injection intensity in in-situ leaching mining includes the following steps:

[0017] S1. Drill a liquid injection hole, use a drill to drill down from the top of the clay layer 7 through the clay layer 7 and the ore body layer 8, and drill into the bedrock 9 to a depth of 2~2.4m to form the liquid injection hole 10;

[0018] S2. Assemble the upper mold bag 1 and the lower mold bag 2 with the anchor rod 3, the injection pipe 4, the grouting pipe I5 and the grouting pipe II6 with metal wires. The gap between the upper mold bag 1 and the lower mold bag 2 The distance is determined according to the thickness of the ore body layer 8, to ensure that the bolt 3 is inserted into the bottom of the injection hole 10, and to ensure that the boundary line between the clay layer 7 and the ore body layer 8 is perpendicular to the upper and lower ends of the upper mold bag 1. The distances are greater than or equal to 50cm, while ensuring that the vertical distance between the boundary line between the ore body layer 8 and the bedrock 9 and the upper and lower ends of the lower mold bag 2 is greater than or equal to 50cm;

[0019] S3. Inject the cement slurry, inject the cement slurry through the inlet of the grouting pipe I, the cement slurry enters the upper mold bag 1 through the grouting hole on the grouting pipe I, and the injected cement slurry gradually increases the volume of the upper mold bag 1 , The upper mold bag 1 is tightly attached to the boundary between the clay layer 7 and the ore body layer 8 under the action of cement diffusion, which increases the bonding strength between the clay layer 7 and the ore body layer 8. Under the action of 3, the phenomenon of slippage and landslide between the clay layer 7 and the ore body layer 8 is avoided, so as to realize the grouting of the upper mold bag 1. At the same time, the cement slurry is injected through the inlet of the grouting pipe II6. The grouting hole on the grouting pipe II6 enters the lower mold bag 2, and the injected cement slurry gradually increases the volume of the lower mold bag 2. The lower mold bag 2 is tightly attached to the ore body layer 8 under the action of cement diffusion. At the boundary line between the ore body layer 8 and the bed rock 9, the bonding strength between the ore body layer 8 and the bed rock 9 is increased. Under the action of the bolt 3, the slip and the slip between the ore body layer 8 and the bed rock 9 are avoided. The phenomenon of landslide, so as to realize the grouting of the lower mould bag 2;

[0020] S4. The injection of the medicament, the injection pipe 4 is passed through the inlet end of the injection pipe 4, and the medicament enters the area formed by the upper mold bag 1, the injection hole 10 and the lower mold bag 2, thereby realizing the injection of the medicament. Dissolve the ionic rare earth in the ore body into the medicament to become the mother liquor, and realize the collection of the mother liquor. This method effectively avoids the problem of the clay layer 7 and the ore body layer 8 when the medicament injection speed is too fast or the injection amount is too large. The phenomenon of slippage at the boundary, the boundary between the ore body layer 8 and the bedrock 9 causes landslides, and at the same time, it prevents the agent from entering the non-ore body layer and between the ore body layer and the non-ore body layer. Waste of medicine.