SU1700253A1 - Method of water proofing of mine shaft lining - Google Patents

Description

one

(21) 4632828/03 (22) 01/05/89 (4b) 12/23/199. Bul. N547

(71) All-Union Scientific Research and Design Institute for the drainage of mineral deposits, special mining, mining geology and surveying business

(72) A.V.Toporkov and N.T.Logachev (53) 622.253.35.002.5: 624 (088.8) (56) USSR Author's Certificate No. 899974, cl. E 21 D 1/12, 1979.

USSR Author's Certificate No. 1372048, cl. E 21 D 1/12, 1986.

(54) METHOD OF WATERPROOFING MEASURES OF A MINE STRAP

(57) The invention relates to mine construction using ice-earth fences (LGO). The goal is to reduce the load on the shaft lining, which is being built under high pressure. With the formation of occluded rocks in LGO, thawing layer 6 and washing away part of the soil. A cement slurry (TP) is injected into the resulting mound. After it is set before the freezing start, the horizontal wells 9 form a cavity 10 between the lining 4 and the solidified solid solution. After freezing of the TP, the remaining volume of the cavity 10 is plugged through the wells 9. 2 Il.

Aa

(L

Fig 2

The invention relates to mine and underground construction and relates to the waterproofing of mine workings covered under the protection of ice-ground fences.

The aim of the invention is to reduce the loads on the lining of the shaft shaft.

FIG. 1 shows an ice-ground fence with fastening of the excavation, a cross-section; in fig. 2 shows section A-A in FIG. one.

The method of waterproofing the shaft shaft is carried out as follows.

In the massif of weak rocks, ice-ground fencing 2 is formed using freezing columns 1, excavation 3 is carried out, tubing lining 4 is installed. If due to rupture of freezing column 1 with brine coming out of the column, a window of thawed rocks 5 was formed, to perform hydrolysis In this case, the lining 4 should be ventilated with warm air to deflect a layer 6 of the wall-to-ground fencing 2 with a thickness of about 0.5 m, after which the flow to the lining 4 should be eliminated through the window 5. Window 5 can be made by torpedoing from freezing columns 1, for which freezing columns 1 are cleaned to the full depth from thermocouple wires, from plugs due to crystallization of calcium chloride, etc. After cleaning, the pipes of the freezing columns are lowered to the required depth of the explosive charge at the rate of rupture of the supply pipe and the external pipe of the column.

Blasting is carried out. A tampon pump is connected to the supply pipe of the column and a cement-slurry solution is injected. When the pressure gauge of the pump reaches a predetermined value, the injection of the solution is stopped, forming a torpedo 7 cavity. After starting the cement slurry in zone 8 near it, from the production 3 of a row of wells 9 in the direction from the upper rows to the lower ones, wells 9 are connected to the pump and the soil of zone 6 is washed out, cavity 10, near the window 5. Formation of cavity 10 must be completed before the cement slurry freezes

zones 8 and reverse freezing of the frozen sections of ice-ground fencing adjacent to zone 8, for which thermal control is organized behind zone 8. After the cement slurry in zone 8 is frozen, the cement slurry 10 is pumped through the wells 9 into the cavity, and the condition

ten

b kn d

0)

kn is the frost heave coefficient of the material formed directly in the zone of column rupture after injection of the cement slurry into it;

b is the thickness of the layer of material in the zone of column break.

The physical meaning of the condition (1) is that the increment in the volume of the rock adjacent to the lining, which is formed due to frost heaving after the injection of the preheated tempered mortar into the torpedoing zone, must be equal to or less than the volume of the cavity washed out,

Due to the condition (1) frost swelling does not create an additional load on the lining.

Claims (1)

The invention ;: Method of waterproofing lining mine the trunk, which includes supplying the coolant to the barrel for thawing the protective ice-fence, drilling from the trunk of a series of horizontal wells, washing out the ground the formation of a closed annular cavity and the injection of a cement slurry into it, characterized in that, in order to reduce the loads, the lining of the shaft shaft, constructed under conditions of large pressures at the level of freezing columns ruptured during penetration of the barrel, the cement slurry is injected into the rupture zone, and after it is set, but before the freezing starts, horizontal wells are drilled with washing away of the soil between the lining and hardened tongon mortar and forming a cavity, and freezing of this cement slurry the remaining volume of the cavity is plugged, Yu / V Fig /