KR100561242B1 - A grout making appratus for Paste Backfill Grouting - Google Patents

Abstract

The present invention relates to an apparatus for preparing a filling material for underground cavities, in particular, by providing a disturbing panel, a screw, and a branch pipe in an agitator, supplying an appropriate amount of water to a cement and an expanding agent supplied at a predetermined weight ratio from the outside, and simultaneously mixing and grinding the paste (Paste It is an object of the present invention to provide an apparatus for producing a filler for underground cavities, which is capable of producing a filler having good fluidity, easy injection, and sufficient compressive strength.

Filler manufacturing apparatus according to the present invention, the suction port and the discharge port is formed with a drum (10); A hopper 20 installed at the suction port to guide the ore powder, cement, and expanding agent into the drum; A branch pipe 30 installed at one side of the hopper 20 to supply water to ore powder, cement, and an expanding agent introduced through the hopper 20; A rotating shaft 40 inserted into the drum 10 through the hopper 20 to allow the ore powder, cement, and the expanding agent to flow along the circumferential surface; The guide shaft 50 is installed at the inner end of the rotating shaft 40 to allow the ore powder, cement and the expanding agent introduced into the drum 10 to be mixed.

Underground cavity, filler, manufacturing equipment, disturbing panel, screw

Description

Filler manufacturing device for underground cavity {A grout making appratus for Paste Backfill Grouting}

1 is a cross-sectional view showing an apparatus for manufacturing a filler for underground cavities according to the present invention.

<Explanation of symbols on main parts of the drawings>

10: drum 20: hopper

30: branch pipe 40: rotation axis

50: guide means 52: disturbing panel

54: screw 60: stopper

62: discharge pipe 70: filling material manufacturing apparatus

The present invention relates to an apparatus for preparing a filling material for underground cavities, in particular, by providing a disturbing panel, a screw, and a branch pipe in an agitator, supplying an appropriate amount of water to a cement and an expanding agent supplied at a predetermined weight ratio from the outside, and simultaneously mixing and grinding the paste (Paste The present invention relates to a filler manufacturing apparatus for underground cavities, which enables to produce a filler having good fluidity, easy injection, and sufficient compressive strength.

In general, the filling material for underground cavity in the mine development area is to prevent the mine, and the pollution caused by the development of the underground resources is called the mine, and the special environmental, Inadequate mining security measures result in mine damage.

These mines include heavy metals containing acidic water, loss of tailings and waste-rock, and leachate of harmful leachate, ground sedimentation in mining top and adjacent areas, and dry season dust (such as fine tailings). Scattering, etc. are mentioned.

Among them, the main mine damage phenomenon acting as a natural environment and living environment, and also as a harmful element of life is the outflow of acid mine drainage containing heavy metals and ground sedimentation of underground cavity. In the present invention, ground sedimentation of underground cavity is described. Let's do it.

The cause of the ground sediment as described above is that the underground cavity is generated due to the development of underground resources, and if the underground cavity is not charged, the balance of the force is lost due to the pressure and stress acting on the upper part, so that it is settled toward the underground cavity. Is generated.

If the stress acting on the upper part is not greater than the ground strength of the ceiling or pillar, sedimentation does not occur, but the ground strength decreases due to groundwater, creep deformation, and penetration of the ground with the passage of time after mining. Destruction of underground cavities occurs due to factors such as water pressure.

In particular, high humidity in underground cavities changes the strength and deformation characteristics of rocks over a short or long period of time, and the role of groundwater in the fault fracture zone, which is a weak part of the geological structure, acts as a factor to decrease the strength of the ground.

In order to solve the problems as described above, the method for filling the underground cavity has emerged, the filling method according to the prior art is agitator for industrial by-products such as soil, masatos, residues or cement milk, cement mortar, concrete, fly ash, etc. In the simple mix was to fill the underground cavity.

However, the cavity fillers are manufactured by simply mixing in the stirrer as described above, and thus do not form a size suitable for filling the underground cavity, so that the fluidity is not good and the workability is poor when pouring, and the composition is not easy to inject, and the composition As a simple mixed form of, it did not have sufficient compressive strength and thus could not expect a desirable load or strength.

In order to solve the above problems of the prior art of the present invention, as well as a simple mixing function of the incoming filler composition as well as providing a filler manufacturing apparatus having a multi-function, such as water supply and grinding and mixing, and It is an object of the present invention to provide a filling apparatus for underground cavities that can be prepared by mixing and pasting at the same time to form a filler having good fluidity, easy injection, and sufficient compressive strength.

In order to solve the above problems, an apparatus for manufacturing a filler for an underground cavity according to the present invention includes a drum having a suction port and a discharge port;

A hopper installed at the suction port to guide ore powder, cement, and expanding agent into the drum;

A branch pipe installed at one side of the hopper to supply water to the ore powder, cement, and the expansion agent introduced through the hopper;

A rotary shaft inserted into the drum through the hopper to allow the ore powder, the cement, and the expanding agent to flow along the circumferential surface;

It is installed on the inner end of the rotating shaft is characterized in that it comprises a guide means for mixing the ore powder and cement, the expansion agent introduced into the drum.

The drum of the present invention is characterized in that a stopper is installed in the discharge port, a plurality of discharge pipes are installed on the side of the stopper so that the mixture is discharged while maintaining a constant speed along the discharge pipe.

And the guide means of the present invention is formed in the shape of a long panel is installed on the inner end of the rotary shaft to form a 'Ｕ' shape and driven by the rotary shaft, the ore powder and cement, the expansion agent, Disturbance panel for mixing the water, and is installed along the circumferential surface of the rotating shaft is characterized in that it comprises a screw for mixing ore powder and cement, expansion agent, water while being mixed with each other.

EMBODIMENT OF THE INVENTION Hereinafter, based on an accompanying drawing, the preferable embodiment of the filler for manufacturing underground cavity parts by this invention is described in detail.

1 is a cross-sectional view showing an apparatus for manufacturing a filler for underground cavities according to the present invention.

As shown therein, the apparatus for manufacturing a filler for the underground cavity according to the present invention includes a drum 10 having a suction port and a discharge port, and a hopper for guiding ore powder, cement, and an expansion agent installed and supplied to the suction port into the drum. 20, the branch pipe 30 is installed on one side of the hopper 20 to supply water to the ore powder and cement, the expansion agent flowing through the hopper 20, and the drum through the hopper 20 (10) the rotary shaft 40 is inserted into the suction port to be introduced into the suction port and the cement, the expansion agent is introduced along the circumferential surface, and installed in the inner end of the rotary shaft 40 is introduced into the drum 10 It comprises a guide means (50) for mixing the ore powder, cement, expanding agent.

Here, the drum 10 is formed in a cylindrical shape forming a predetermined space, as shown in Figure 1, the suction port is formed at the upper end, the discharge port is formed at the lower bar, a hopper long in the vertical direction to the suction port 20 is installed to allow the tailings powder, cement, and expanding agent to be introduced, and the rotating shaft 40 is inserted into the drum 10 through the hopper 20.

At this time, since the diameter of the rotary shaft 40 is formed to be relatively small compared to the inner diameter of the hopper 20, the by-product for manufacturing the filler into the space between the inner wall of the hopper 20 and the peripheral surface of the rotary shaft 40 Field (in the present invention, the tailings powder and cement, the filler is prepared by mixing the expansion agent in a certain ratio) is injected, the rotary shaft 40 is connected to the drive motor (not shown) is rotated so that the input of the tailings powder and cement, expansion agent Make the inflow easy.

In addition, the drum 10 has a stopper 60 is installed in the discharge port, a plurality of discharge pipe 62 is installed on the side of the stopper 60 so that the mixture maintains a constant speed along the discharge pipe 62 The fine powder and the cement, the expanding agent, and the water stay in the drum 10 for a predetermined time, so that the fine powder and the powder can be sufficiently ground and mixed by the guide means 50.

Since the branch pipe 30 is installed to communicate with the inside of the hopper 20 and extends outside the drum 10, the branch pipe 30 can supply water into the hopper 20 from a normal supply means.

The guide means 50 is formed in a long panel shape is installed in the inner end of the rotating shaft 40 to form a '정면' shape and driven by the rotating shaft 40, when introduced into the drum 10 Scattering panel 52 for disturbing the ore powder and cement, expanding agent, water, and screw 54 is installed along the circumferential surface of the rotary shaft 40 to mix the ore powder and cement, expanding agent, water while being crushed with each other It is configured to include.

As a result, the fine powder introduced into the drum 10 sufficiently generates fine particles having a particle diameter of 20 μm or less, and is mixed with other compositions to form a viscous fluid liquid.

Looking at the operation of the filling device for the underground cavity according to the present invention configured as described above are as follows.

First, when power is applied and the tailings powder, cement, and expansion agent are injected through the hopper 20, water is introduced into the hopper 20 along the branch pipe 30 by the supply means, and the tailings at the above ratio. Powder, cement, expanding agent, and water are introduced into the drum 10.

Thereafter, the respective compositions are mixed in the drum 10 by the driving of the rotating shaft 40, and the guide means 50 including the disturbing panel 52 and the screw 54 is formed at the inner end of the rotating shaft 40. The tailings powder and cement, the expanding agent, and the water introduced into the drum 10 are sufficiently pulverized and mixed.

The present invention will be described in detail through examples.

<Example>

A filler for underground cavities containing ore powder, which is an industrial by-product, comprising: 5 to 30 parts by weight of cement based on 100 parts by weight of the ore powder, and 0.5 to 2 parts by weight of expanding agent based on 100 parts by weight of the ore powder through the hopper. Input.

Water is supplied through the branch pipe to the injected cement and the expansion agent.

At this time, it is preferable to supply 10 to 70 parts by weight of water with respect to 100 parts by weight of the ore powder.

The apparatus of the present invention is operated for 10 to 15 minutes so that the cement, the expanding agent, and the water are sufficiently ground and mixed in the drum.

Table 1 below shows the physical properties of the filler produced through the manufacturing apparatus applied to the present invention.

Item Standard value (KS F 2562) Chemical composition MgO (%) 5.0 or less L.O.I (%) 3.0 or less Physical properties Yes Min 60 or more Termination (min) below 10 Expandability (length change rate) 7 days 0.0003 or more 28 days -0.0002 or more Compressive strength (㎏f / ㎠) 3 days More than 70 7 days More than 150 28 days More than 300

Fillers having the physical properties as described above, the rheology (Rheology) is about 7 inches (inch) to enable long-distance transfer of 300m or more, and the proportion of fine particles of 20㎛ or less in the filler constituent material more than 15% Therefore, sufficient water holding capacity is maintained, and the non-condensation property that the volume is not reduced even when the filler is cured by the expanding agent is generated, and the uniaxial compressive strength is expressed at 5 kg / cm 2 or more at 28 days of age, so that it is easy to inject into the underground cavity. It can be made, and curing after injection can effectively prevent ground subsidence.

As described above, according to the present invention, the filling device for the underground cavity, the present invention not only has a simple mixing function of the compositions for producing the filler, but also has a multifunctional function such as water supply, pulverization and mixing, and facilitates the manufacturing of the filler. In particular, by finely pulverizing and pasting into a paste at the same time in the device, there is an effect such that a filler having good fluidity, easy injection, and a sufficient compressive strength can be produced.

Claims (3)

delete A drum 10 having a suction port and a discharge port formed therein, a hopper 20 for guiding ore powder, cement, and an expanding agent provided in the suction port into the drum, and a hopper 20 installed at one side of the hopper 20. Branches 30 to supply water to the ore powder and cement, expanding agent flowing through the) and the ore powder and cement, expanding agent inserted into the drum 10 through the hopper 20 and introduced into the suction port Rotating shaft 40 to be introduced along the circumferential surface, and guide means 50 is installed on the inner end of the rotating shaft 40 to mix the ore powder, cement, and the expanding agent introduced into the drum 10; In the device for producing a filling material for underground cavities, A stopper 60 is installed at the discharge port of the drum 10, and a plurality of discharge pipes 62 are installed at the side of the stopper 60 so that the mixture is discharged while maintaining a constant speed along the discharge pipe 62. Is composed, The guide means 50 is formed in an elongated panel shape and installed at an inner end of the rotating shaft 40 so as to form a 'Ｕ' shape and driven by the rotating shaft 40 to be introduced into the drum 10. Scattering panel 52 for mixing ore powder and cement, expanding agent, water, and screw 54 is installed along the circumferential surface of the rotary shaft 40 to mix ore powder and cement, expanding agent, water while being crushed with each other Apparatus for producing a filler for underground cavities, characterized in that comprising a. delete

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