CN113700016B - Ground water plugging method for extremely strong flowing water passing channel of underground mine - Google Patents
Ground water plugging method for extremely strong flowing water passing channel of underground mine Download PDFInfo
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- CN113700016B CN113700016B CN202111032535.3A CN202111032535A CN113700016B CN 113700016 B CN113700016 B CN 113700016B CN 202111032535 A CN202111032535 A CN 202111032535A CN 113700016 B CN113700016 B CN 113700016B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/027—Investigation of foundation soil in situ before construction work by investigating properties relating to fluids in the soil, e.g. pore-water pressure, permeability
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Abstract
The invention discloses a ground water plugging method for an extremely strong flowing water passing channel under the underground of a mine, which comprises the following steps: acquiring the position of an underground water passage; completing blasting drilling to a rock stratum above the underground water passing channel according to the position of the underground water passing channel; and filling explosives into the blasting drill hole and detonating to collapse the rock layer above the underground water passing channel, and accumulating the collapsed rock blocks in the underground water passing channel to form a rock block water plugging body for plugging the underground water passing channel. The invention has the beneficial effects that: according to the invention, through implementation of blasting and drilling, the explosive is conveniently placed in the rock stratum above the underground water passing channel, the rock stratum above the underground water passing channel is collapsed through detonation of the explosive, so that the underground water passing channel is blocked by the collapsed rock blocks, and the collapsed rock blocks are large in volume and rapid in collapse process, so that the rock blocks can be prevented from being washed away by water flow, and the underground extremely strong flowing water passing channel can be effectively and rapidly blocked.
Description
Technical Field
The invention relates to the technical field of prevention and control of underground flood in mountain mining, in particular to a ground water plugging method for an extremely strong flowing water channel in the underground of a mine.
Background
Mine flood is a major hazard threatening the safe production of mines, and mine water inrush accidents happen occasionally, which has a major impact on the production, safety and operation of mines. The traditional mine water plugging method is that a position of an underground water passing channel (comprising a karst cave formed naturally, a tunnel formed by engineering excavation and the like) is found out by drilling from the ground according to geological data, a geological drilling machine is adopted to drill a hole on the ground to lead the underground water passing channel to the underground water passing channel, water plugging materials such as large aggregates, small stones, cement and glass water double-slurry are injected into the underground water passing channel through the ground drilling hole, the aggregates are deposited and then stacked to form a water plugging wall, the flow cross-section area of water is reduced, the flow mode of the water in the water passing channel is changed into seepage, and then grouting plugging is carried out to cut off the water (for example, the invention patent in China with the application number of CN 201410050731.7).
However, when the underground water passage has a large space, the water inflow is too large, and the water flow speed is extremely high, the underground water passage is limited by the restriction of the aperture of the drilled hole, the aggregate which is thrown into the underground water passage through the drilled hole has a small size (generally less than 100mm), and a large amount of aggregate is washed away by the water flow after being thrown into the underground water passage, so that a large amount of aggregate and time are wasted, extremely high water plugging cost and huge economic loss caused by mine shutdown are caused, and the water plugging effect is poor. Therefore, a ground water plugging method capable of effectively and quickly plugging underground extremely strong flowing water channels is urgently needed to be explored, and is a technical problem needing to be solved for current mine water disaster treatment.
Disclosure of Invention
In view of this, it is necessary to provide a water blocking method capable of effectively and rapidly blocking an underground extremely strong flowing water passage.
In order to achieve the aim, the invention provides a ground water plugging method for an extremely strong flowing water channel under the ground of a mine, which comprises the following steps:
acquiring the position of an underground water passage;
completing blasting drilling to a rock stratum above the underground water passing channel according to the position of the underground water passing channel;
and filling explosives into the blasting drill hole and detonating to collapse the rock layer above the underground water passing channel, and accumulating the collapsed rock blocks in the underground water passing channel to form a rock block water plugging body for plugging the underground water passing channel.
Preferably, completing blasting drilling to a rock stratum above the underground water channel comprises the following steps: completing primary blasting drilling in a fourth series stratum of the ground surface; setting a blasting sleeve into the primary blasting drill hole and cementing the well; and completing secondary blasting drilling to the rock stratum above the underground water channel in the bedrock stratum below the primary blasting drilling.
Preferably, after the step of filling explosive into the blast borehole and detonating to collapse the rock layer above the underground water channel, the collapsed rock blocks are deposited in the underground water channel to form a rock block water blocking body for blocking the underground water channel, the method further comprises the following steps: according to the position of the underground water passing channel, completing a flow velocity observation drilling hole leading to the underground water passing channel, and arranging a velocimeter in the flow velocity observation drilling hole to measure the water flow velocity in the underground water passing channel, wherein the joint of the flow velocity observation drilling hole and the underground water passing channel is a first joint, the joint of the blasting drilling hole and the underground water passing channel is a second joint, and the first joint is positioned at the downstream of the second joint along the water flow direction of the underground water passing channel.
Preferably, the flow velocity observation drilling to the underground water passage is completed, and specifically comprises: completing primary flow velocity observation drilling in a fourth series stratum of the earth surface; a first flow velocity observation casing is put into the primary flow velocity observation drill hole and is well-fixed; completing a secondary flow velocity observation borehole in the bedrock stratum below the primary flow velocity observation borehole; a second flow velocity observation casing is put into the secondary flow velocity observation drill hole and is well-fixed; and completing the third-stage flow velocity observation drilling hole communicated with the underground water channel in the bedrock stratum below the second-stage flow velocity observation drilling hole.
Preferably, after the step of filling explosive into the blast borehole and detonating to collapse the rock layer above the underground water channel, the collapsed rock blocks are deposited in the underground water channel to form a rock block water blocking body for blocking the underground water channel, the method further comprises the following steps: and finishing an energy-unloading drill hole leading to the underground water passing channel according to the position of the underground water passing channel, wherein the joint of the energy-unloading drill hole and the underground water passing channel is a third joint, the joint of the blasting drill hole and the underground water passing channel is a second joint, and the third joint is positioned at the upstream of the second joint along the water flow direction of the underground water passing channel.
Preferably, a liquid level measuring piece is arranged in the energy discharging drill hole and used for measuring the liquid level height in the energy discharging drill hole.
Preferably, the completion of the energy discharge drilling to the underground water passage specifically comprises: completing primary energy-discharging drilling in the fourth series stratum of the earth surface; a first energy discharging casing is put into the first-stage energy discharging drill hole and well cementation is carried out; completing secondary energy-discharging drilling in the bedrock stratum below the primary energy-discharging drilling; a second energy discharging casing is put into the secondary energy discharging drill hole and well cementation is carried out; and completing the three-stage energy-unloading drilling hole communicated with the underground water channel in the bedrock stratum below the two-stage energy-unloading drilling hole.
Preferably, after the step of filling explosive into the blast borehole and detonating to collapse the rock layer above the underground water channel, the collapsed rock blocks are deposited in the underground water channel to form a rock block water blocking body for blocking the underground water channel, the method further comprises the following steps: and according to the position of the underground water channel, completing a plurality of filler drill holes leading to the underground water channel, and respectively throwing fillers into the underground water channel through each filler drill hole to form a plurality of filler water plugging bodies in the underground water channel, wherein each filler water plugging body and the rock block water plugging body are sequentially connected, and the rock block water plugging body is positioned at the downstream of each filler water plugging body along the water flow direction of the underground water channel.
Preferably, the particle size of the filler of each filler water plugging body is gradually increased along the water flow direction of the underground water passage.
Preferably, the concrete method for respectively putting the filler into the underground water channel through each filler drilling hole is as follows: feeding filler into each filler drill hole through a feeding machine; injecting high-pressure water flow into each filler drilling hole through a high-pressure water supply and grouting integrated machine so as to prevent the fed materials in the filler drilling holes from being blocked; and injecting cement and water glass double-slurry into each filler drill hole through a high-pressure water feeding and grouting integrated machine so as to reinforce the filler water plugging body.
Compared with the prior art, the technical scheme provided by the invention has the beneficial effects that: according to the invention, through implementation of blasting and drilling, the explosive is conveniently placed in the rock stratum above the underground water passing channel, the rock stratum above the underground water passing channel is collapsed through detonation of the explosive, so that the underground water passing channel is blocked by collapsed rock blocks, and the collapsed rock blocks are large in volume and rapid in collapse process, so that the rock blocks can be prevented from being washed away by water flow, and the underground extremely strong flowing water passing channel can be effectively and rapidly blocked.
Drawings
FIG. 1 is a schematic construction section view of an embodiment of a method for blocking water on the ground of an extremely strong flowing water channel under the ground of a mine provided by the invention;
FIG. 2 is a schematic flow chart of an embodiment of the method for blocking water on the ground of the extremely strong flowing water channel of the underground mine provided by the invention;
FIG. 3 is a top plan view of the construction section drilling arrangement of FIG. 1;
FIG. 4 is a schematic flow chart of step S2 in FIG. 2;
FIG. 5 is a schematic flow chart of step S4 in FIG. 2;
FIG. 6 is a schematic flow chart of step S5 in FIG. 2;
FIG. 7 is a schematic structural diagram of the water plugging body with the filler and the rock block in FIG. 1;
FIG. 8 is a schematic flow chart of step S6 in FIG. 2;
FIG. 9 is a schematic illustration of the charge construction process of the pad drill of FIG. 1;
in the figure: 1-blasting drilling, 2-rock water plugging, 3-fourth series stratum, 4-flow velocity observation drilling, 5-velocimeter, 6-energy unloading drilling, 7-liquid level measuring piece, 8-filler drilling, 9-filler water plugging, 11-first-stage blasting drilling, 12-blasting casing, 13-second-stage blasting drilling and 41-first-stage flow velocity observation drilling, 42-a first flow rate observation casing, 43-a second flow rate observation borehole, 44-a second flow rate observation casing, 45-a third flow rate observation borehole, 61-a first energy-discharging borehole, 62-a first energy-discharging casing, 63-a second energy-discharging borehole, 64-a second energy-discharging casing, 65-a third energy-discharging borehole, 81-a feeder, 82-a filler funnel and 83-a high-pressure water feeding and grouting integrated machine.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Referring to fig. 1 and 2, the invention provides a ground water plugging method for an extremely strong flowing water channel under the ground of a mine, which comprises the following steps:
s1, acquiring the position and the geometric dimension of the underground water passing channel, wherein the position and the geometric dimension of the underground water passing channel can be determined by geological data and geophysical prospecting data, which is the prior art and is not described again;
s2, according to the position of the underground water channel, completing blasting drilling 1 leading to a rock stratum above the underground water channel, in the embodiment, the drilling method adopts directional drilling, the directional drilling technology can enable the drill hole to reach a target position along a pre-designed direction and track, the drill hole automatically corrects the deviation, and water plugging drilling construction is rapidly completed;
and S3, filling explosives into the blasting drill hole 1 and detonating to collapse rock layers above the underground water passing channel, wherein the collapsed rock blocks are accumulated in the underground water passing channel to form a rock block water plugging body 2 for plugging the underground water passing channel.
The water plugging body 2 of the rock blocks formed by blasting has the characteristics of large rock block size at the lower part and small rock block size at the upper part, the length of the rock blocks which are partially blasted and collapsed can reach more than 1m, and the collapse of the rock blocks can better resist the action of flowing water scouring. The function of the rock water plugging body 2 is mainly two aspects, namely water plugging on one hand, and water plugging materials (detailed later) which are put in later period are blocked by the large rock piles formed by blasting on the other hand, so that the flushing amount of the flowing water to the water plugging materials is effectively reduced.
According to the invention, through implementation of the blasting drilling 1, the explosive is conveniently placed in the rock stratum above the underground water passing channel, the rock stratum above the underground water passing channel is collapsed by detonating the explosive, so that the underground water passing channel is plugged by the collapsed rock blocks, and the collapsed rock blocks are large in volume and rapid in collapse process, so that the rock blocks can be prevented from being washed away by water flow, and the extremely strong underground flowing water passing channel can be effectively and rapidly plugged.
In order to determine the installation position of the explosive, the installation position of the explosive can be determined through theoretical analysis, and the specific calculation process is as follows:
(1) the space height of the water passing section of the underground water passing channel is obtained through geophysical prospecting data, and the thickness M of the rock of the layer 1 overlying the top surface of the water passing channel is obtained through geological data1Coefficient of crushing expansion K 12 nd layer rock thickness M2Coefficient of crushing expansion K2… … thickness M of rock of the n-th layernCoefficient of crushing expansion Kn。
(2) Assuming that the n-th rock stratum caving thickness is MxIn the process, the caving rock can fill the height of the water passing section space and the height of the caving rock space, so that the height M of the nth rock layer needing to be cavedxComprises the following steps:
(3) therefore, the total height H of the overburden layer on the top plate of the water channel, which needs to be collapsed, is as follows:
(4) the radius of the crushing ring of the blast hole needs to be larger than H/2, so that the installation position of the explosive filled in the blast hole can be calculated:
in the above formula, h is the distance between the explosive loading position and the upper part of the top surface of the underground water passage, MiThe thickness of the i-th layer of rock above the underground water passing channel, M is the height of the water passing section, KiIs the coefficient of crushing and expansion, K, of the i-th layer of rock above the underground water channelnFor passing undergroundThe coefficient of crushing and swelling of the nth layer of rock above the water channel, n is the number of layers of rock layers required to collapse for plugging the underground water channel, and i is a natural number greater than 0.
After the installation position of explosive filled in the blasting drill hole 1 is determined, blasting parameters such as explosive loading amount and the like are determined on the basis, which is the prior art and is not described again.
In order to prevent the blast hole 1 from collapsing, referring to fig. 1 to 4, in a preferred embodiment, the step S1 includes:
s11, completing primary blasting drilling 11 in the fourth series stratum 3 on the ground surface;
s12, lowering the blasting casing 12 into the primary blasting borehole 11 and cementing the casing, thereby preventing the primary blasting borehole 11 drilled in the loose fourth-family stratum 3 from collapsing;
and S13, completing the secondary blasting drill hole 13 leading to the rock layer above the underground water channel in the bedrock stratum below the primary blasting drill hole 11, wherein the service time of the secondary blasting drill hole 13 is short, so that a sleeve does not need to be installed and the cement grout does not need to be injected for fixing.
In this embodiment, the aperture of the primary blasting borehole 11 is 443.5mm, the depth end position of the primary blasting borehole 11 is a position 5m below the bedrock through the surface fourth loose layer, after the blasting casing 12 with the diameter of 339.7mm is put in, cement slurry is injected into the annular space between the blasting casing 12 and the primary blasting borehole 11, and the blasting casing 12 is fixed; the aperture of the secondary blasting drill hole 13 is 244.5mm, the depth end position of the secondary blasting drill hole 13 is H/2 away from the top surface of the underground water channel, and then the explosive is placed at the bottom of the secondary blasting drill hole 13 and indexed by detonating.
In order to measure the flow velocity change of the water flow downstream of the rock block water plugging body 2, referring to fig. 1 and 2, in a preferred embodiment, the step S3 is further followed by:
s4, according to the position of the underground water passing channel, completing a flow velocity observation drill hole 4 leading to the underground water passing channel, and setting a velocimeter 5 in the flow velocity observation drill hole 4 to measure the water velocity in the underground water passing channel, wherein the joint of the flow velocity observation drill hole 4 and the underground water passing channel is a first joint, the joint of the blasting drill hole 1 and the underground water passing channel is a second joint, and the first joint is located at the downstream of the second joint along the water flow direction of the underground water passing channel. The water plugging effect can be evaluated by measuring the water flow velocity change of the downstream of the rock water plugging body 2 through the velocimeter 5, specifically, the water plugging rate of the rock water plugging body 2 obtained through measurement of the velocimeter 5 is more than 30%, otherwise, new blasting drilling, explosive filling and detonation are implemented near the blasting drilling hole 1 again until the water flow velocity is reduced by more than 30% compared with the original water flow velocity.
In order to prevent the borehole 4 from collapsing due to the flow rate observation, referring to fig. 1 and 5, in a preferred embodiment, the step S4 specifically includes:
s41, completing a primary flow velocity observation borehole 41 in the surface fourth series stratum 3;
s42, a first flow velocity observation casing 42 is put into the primary flow velocity observation borehole 41 and is well-fixed;
s43, completing a secondary flow velocity observation drill hole 43 in the bedrock stratum below the primary flow velocity observation drill hole 41;
s44, a second flow rate observation casing 44 is put into the secondary flow rate observation borehole 43 and is cemented;
and S45, completing a tertiary flow rate observation borehole 45 communicated with the underground water channel in the bedrock stratum below the secondary flow rate observation borehole 43.
In this embodiment, the aperture of the primary flow rate observation borehole 41 is 660.4mm, the depth termination position of the primary flow rate observation borehole 41 is 5m below the bedrock after penetrating through the fourth loose layer, and after the first flow rate observation casing 42 with the diameter of 508.0mm is lowered, cement slurry is injected into the annular space between the first flow rate observation casing 42 and the primary flow rate observation borehole 41, so as to fix the first flow rate observation casing 42; the aperture of the secondary flow velocity observation borehole 43 is 443.5mm, the depth stop position of the secondary flow velocity observation borehole 43 is a position 2m above the top plate of the cross section of the water passing roadway, after a second flow velocity observation casing 44 with the diameter of 339.7mm is lowered, cement slurry is injected into the annular space between the second flow velocity observation casing 44 and the secondary flow velocity observation borehole 43, and the second flow velocity observation casing 44 is fixed; the aperture of the three-stage flow velocity observation drill hole 45 is 244.5mm, the three-stage flow velocity observation drill hole 45 needs to drill through a rock stratum to enter an underground water channel, and the three-stage flow velocity observation drill hole 45 does not need to be fixed by injecting cement slurry.
In order to reduce the pressure energy of the fluid in the underground water channel, referring to fig. 1 and fig. 2, in a preferred embodiment, the step S3 is further followed by:
s5, completing an energy-unloading drill hole 6 leading to the underground water passing channel according to the position of the underground water passing channel, wherein the joint of the energy-unloading drill hole 6 and the underground water passing channel is a third joint, the joint of the blasting drill hole 1 and the underground water passing channel is a second joint, and the third joint is located at the upstream of the second joint along the water flow direction of the underground water passing channel.
The theoretical principle of arranging the energy-discharging drill holes 6 is as follows: according to the Bernoulli equation for expressing the energy conservation of the fluid, in the flow with neglected viscous loss, the sum of the pressure potential energy (namely, pressure head), the kinetic energy (namely, flow velocity head) and the potential energy (namely, position head) of any two points on a streamline is kept unchanged, and is expressed as p +1/2 rho v2+ ρ gh is constant (p is the pressure of water, ρ is the density of water, v is the velocity of the water flow, g is the acceleration of gravity, h is the height of the water level).
If the position of the water blocking body 2 by the rock block is a point b and any point at the upstream of the water blocking body 2 by the rock block is a point a, when the water blocking body 2 by the rock block is not formed, pa+1/2ρva 2+ρgha＝pb+1/2ρvb 2+ρghb. If a rock block is formed at the point b and the water body 2 is blocked, the water flow is intercepted, and the water flow velocity vbGreatly reduced, if the top plate of the water passing channel is complete and compact, the water passing channel is closed, so that the water level is difficult to lift, namely hbThe variable quantity is small or constant, and after the water block 2 blocks the water, the water flow pressure energy p is inevitably causedbThe thrust acting on the rock plugging body 2 is rapidly increased, namely, the water flow pressure energy is multiplied by the area of the rock plugging body 2 (equal to the cross-sectional area of the water channel), so that the thrust acting on the rock plugging body 2 is knownThe thrust of (2) can sharply increase, possibly pushing down the rock block and blocking the water body 2.
In view of the above, in the method of the invention, the energy-discharging drill 6 is arranged at the upstream position of the rock water plugging body 2, and when the rock water plugging body 2 stops, the water flow velocity v is causedbWhen greatly reduced, the fluid level in the water passage can rise through the energy-releasing bore 6, i.e. hbIncrease and effectively reduce the water pressure energy pbThe lifting device plays a role in energy unloading, reduces the thrust acting on the water plugging body 2 of the rock, protects the water plugging body 2 of the rock and avoids the collapse and damage of the water plugging body 2.
In order to measure the water level change of the rock block water plugging body 2 upstream, referring to fig. 1, in a preferred embodiment, a liquid level measuring piece 7 is arranged in the energy discharging drill hole 6, and the liquid level measuring piece 7 is used for measuring the liquid level in the energy discharging drill hole 6.
In order to prevent the energy discharge drill 6 from collapsing, referring to fig. 1 and 6, in a preferred embodiment, the step S5 specifically includes:
s51, completing a primary energy-discharging borehole 61 in the fourth series stratum 3 of the earth surface;
s52, a first energy discharging casing 62 is put into the first-stage energy discharging drill hole 61, and well cementation is carried out;
s53, completing a secondary energy-discharging drill hole 63 in the bedrock stratum below the primary energy-discharging drill hole 61;
s54, a second energy discharging casing 64 is put into the secondary energy discharging drill hole 63, and well cementation is carried out;
and S55, completing a third-stage energy-discharging drill hole 65 communicated with the underground water channel in the bedrock stratum below the second-stage energy-discharging drill hole 63.
In this embodiment, the construction parameters of the energy-discharging borehole 6 may refer to the construction parameters of the flow velocity observation borehole 4, which is not described in detail herein.
In order to improve the water blocking effect, referring to fig. 1 and fig. 2, in a preferred embodiment, the step S3 is further followed by:
s6, according to the position of the underground water channel, completing a plurality of filler drill holes 8 leading to the underground water channel, and respectively throwing fillers into the underground water channel through the filler drill holes 8 to form a plurality of filler water plugging bodies 9 in the underground water channel, wherein each filler water plugging body 9 and the rock block water plugging body 2 are sequentially connected, and the rock block water plugging body 2 is positioned at the downstream of each filler water plugging body 9 along the water flow direction of the underground water channel.
The filler drill holes 8 are constructed in sequence along the reverse water flow direction of the underground water passage, and the implementation number of the filler drill holes 8 is determined according to the actual water plugging effect.
In this embodiment, after the first filler drill hole 8 is completed and filled, the water plugging rate is measured by the velocimeter 5, the water plugging rate is greater than 45%, the feeding of aggregate stones of the first filler drill hole 8 is completed to form a first filler water plugging body 9, and a part of the aggregate stones fed through the first filler drill hole 8 can be wedged into a gap (as shown in fig. 7) of the rock water plugging body 2 formed by blasting under the carrying effect of the flowing water flow to encrypt the rock water plugging body 2, so that the water plugging effect of the rock water plugging body 2 is further improved; then, drilling a second filler drill hole 8 and filling by adopting the same drilling method, measuring the water plugging rate by using a velocimeter 5, wherein the water plugging rate is more than 60%, finishing the throwing of aggregate stones in the second filler drill hole 8 to form a second filler water plugging body 9, wherein part of the aggregate stones thrown in the second filler drill hole 8 can be wedged into a gap of the first filler water plugging body 9 under the carrying action of flowing water flow, so that the first filler water plugging body 9 is encrypted, and the water plugging effect of the first filler water plugging body 9 is further improved; and (3) implementing the third filler drilling hole 8 by the same method to enable the water plugging rate to reach 75%, and finally injecting cement-water wave glass double-slurry into each filler drilling hole 8 to reinforce each filler water plugging body 9 to enable the water plugging rate to reach more than 90%.
In order to further improve the water plugging effect, referring to fig. 1, in a preferred embodiment, the particle size of the filler of each filler water plugging body 9 is gradually increased along the water flow direction of the underground water passage. In this embodiment, the filler of the first filler borehole 8 is the aggregate stone of about 100mm, the filler of the second filler borehole 8 is the medium bulk aggregate stone of about 70mm, and the filler of the third filler borehole 8 is the medium bulk aggregate stone of about 40mm, so along the water flow direction, the granularity of the filler increases gradually, and like this, under the effect of water flow, the filler of small granularity can wedge into the filler of large granularity, thereby encrypt the filler of large granularity, improve water shutoff effect.
In the embodiment, each filler drill hole 8 adopts a three-level structure, the aperture of the first-level filler drill hole is 660.4mm, the depth termination position of the first-level filler drill hole is that the first-level filler drill hole penetrates through a fourth loose layer on the ground surface and enters 5m below bedrock, and after a first filler sleeve with the diameter of 508.0mm is put into the first filler drill hole, cement slurry is injected into the annular space between the first filler sleeve and the first-level filler drill hole to fix the first filler sleeve; the aperture of the secondary filler drilled hole is 443.5mm, the depth stop position of the secondary filler drilled hole is a position 2m above the top plate of the cross section of the water passing roadway, cement slurry is injected into the annular space between the second filler sleeve and the secondary filler drilled hole after the second filler sleeve with the diameter of 339.7mm is put in, and the second filler sleeve is fixed; the aperture of the three-level filler drilling hole is 244.5mm, the three-level filler drilling hole needs to be drilled through the rock stratum to enter the underground water passage, and the three-level filler drilling hole does not need to be fixed by injecting cement slurry.
In order to facilitate the feeding through the filler drill holes 8, referring to fig. 1, 8 and 9, in a preferred embodiment, in the step S6, the specific method for feeding the filler into the underground water channel through each filler drill hole 8 is as follows:
s61, feeding the filler into each filler drill hole 8 through a feeder 81, wherein a filler funnel 82 can be arranged at the wellhead of each filler drill hole 8 so as to facilitate feeding;
s62, injecting high-pressure water flow into each filler drill hole 8 through the high-pressure water supply and grouting integrated machine 83 to prevent the fed materials in the filler drill holes 8 from being blocked;
and S63, injecting cement and water glass double grout into each filler drilling hole 8 through the high-pressure water feeding and grouting integrated machine 83 to reinforce the filler water plugging body 9.
In summary, the blasting drill holes 1 are implemented, so that explosives can be conveniently placed in rock strata above an underground water channel, the rock strata above the underground water channel is collapsed by detonating the explosives, the collapsed rock blocks form the rock block water plugging body 2 to plug the underground water channel, the collapsed rock blocks are large in size and rapid in collapse process, so that the rock blocks can be prevented from being washed away by water flow, the water plugging effect is measured by implementing the flow velocity observation drill holes 4, the pressure energy of fluid in the water channel is reduced by implementing the energy unloading drill holes 6, and the water plugging layer is encrypted by implementing the filler drill holes 8, so that the underground extremely strong flowing water channel can be effectively and rapidly plugged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (8)
1. A method for blocking water on the ground of a mine underground extremely strong flowing water channel is characterized by comprising the following steps:
acquiring the position of an underground water passage;
according to the position of the underground water passage, blasting drilling leading to a rock stratum above the underground water passage is completed, and the method specifically comprises the following steps: completing primary blasting drilling in a fourth series stratum of the ground surface; setting a blasting sleeve into the primary blasting drill hole and cementing the well; completing secondary blasting drilling to a rock stratum above the underground water channel in a bedrock stratum below the primary blasting drilling;
filling explosives into the blasting drill hole and detonating to collapse rock layers above the underground water passing channel, wherein the collapsed rock blocks are accumulated in the underground water passing channel to form a rock block water plugging body for plugging the underground water passing channel;
according to the position of the underground water passing channel, completing a flow velocity observation drilling hole leading to the underground water passing channel, and arranging a velocimeter in the flow velocity observation drilling hole to measure the water flow velocity in the underground water passing channel, wherein the joint of the flow velocity observation drilling hole and the underground water passing channel is a first joint, the joint of the blasting drilling hole and the underground water passing channel is a second joint, and the first joint is positioned at the downstream of the second joint along the water flow direction of the underground water passing channel.
2. The ground water plugging method for the extremely strong dynamic water passing channel of the underground mine according to claim 1, wherein the completion of the flow velocity observation drilling to the underground water passing channel specifically comprises:
completing primary flow velocity observation drilling in a fourth series stratum of the earth surface;
a first flow velocity observation casing is put into the primary flow velocity observation drill hole and is well-fixed;
completing a secondary flow velocity observation borehole in the bedrock stratum below the primary flow velocity observation borehole;
a second flow velocity observation casing is put into the secondary flow velocity observation drill hole and is well-fixed;
and completing the third-stage flow velocity observation drilling hole communicated with the underground water channel in the bedrock stratum below the second-stage flow velocity observation drilling hole.
3. The method for ground water plugging of a mine underground extremely strong dynamic water overflow channel according to claim 1 or 2, characterized in that after the step of filling explosives into the blasting drill hole and detonating to collapse rock layers above the underground overflow channel, rock blocks obtained by the collapse are accumulated in the underground overflow channel to form a rock block water plugging body for plugging the underground overflow channel, the method further comprises the following steps:
and finishing an energy-unloading drill hole leading to the underground water passing channel according to the position of the underground water passing channel, wherein the joint of the energy-unloading drill hole and the underground water passing channel is a third joint, the joint of the blasting drill hole and the underground water passing channel is a second joint, and the third joint is positioned at the upstream of the second joint along the water flow direction of the underground water passing channel.
4. The method for blocking water on the ground of the extremely strong dynamic water passing channel of the underground mine according to claim 3, wherein a liquid level measuring piece is arranged in the energy-discharging drill hole and is used for measuring the height of the liquid level in the energy-discharging drill hole.
5. The ground water plugging method for the extremely strong flowing water passing channel of the mine underground according to claim 3, wherein the completion of energy unloading drilling to the underground water passing channel specifically comprises:
completing primary energy-discharging drilling in the fourth series stratum of the earth surface;
a first energy discharging casing is put into the first-stage energy discharging drill hole and well cementation is carried out;
completing secondary energy-discharging drilling in the bedrock stratum below the primary energy-discharging drilling;
a second energy discharging casing is put into the secondary energy discharging drill hole and well cementation is carried out;
and completing the three-stage energy-discharging drill hole communicated with the underground water channel in the bedrock stratum below the two-stage energy-discharging drill hole.
6. The method for ground water plugging of a mine underground extremely strong dynamic water overflow channel according to claim 1 or 2, characterized in that after the step of filling explosives into the blasting drill hole and detonating to collapse rock layers above the underground overflow channel, rock blocks obtained by the collapse are accumulated in the underground overflow channel to form a rock block water plugging body for plugging the underground overflow channel, the method further comprises the following steps:
according to the position of the underground water channel, completing a plurality of filler drill holes leading to the underground water channel, and respectively throwing fillers into the underground water channel through each filler drill hole to form a plurality of filler water plugging bodies in the underground water channel, wherein each filler water plugging body and the rock block water plugging body are sequentially connected, and the rock block water plugging body is positioned at the downstream of each filler water plugging body along the water flow direction of the underground water channel.
7. The method for ground water plugging of the extremely strong dynamic water passing channel of the underground mine as claimed in claim 6, wherein the particle size of the filler of each filler water plugging body is gradually increased along the water flow direction of the underground water passing channel.
8. The ground water plugging method for the extremely strong dynamic water passing channel of the underground mine according to claim 6, wherein the concrete method for respectively putting the filler into the underground water passing channel through each filler drilling hole is as follows:
feeding filler into each filler drill hole through a feeding machine;
injecting high-pressure water flow into each filler drilling hole through a high-pressure water feeding and grouting integrated machine so as to prevent the fed materials in the filler drilling holes from being blocked;
and injecting cement and water glass double-slurry into each filler drill hole through a high-pressure water feeding and grouting integrated machine so as to reinforce the filler water plugging body.
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| CN85106979A (en) * | 1985-09-16 | 1987-04-01 | 矿山开发中心研究所 | Natural and the following method of cheating current in cave, the tunnel in artificially of shutoff |
| CN87103870A (en) * | 1986-04-17 | 1988-01-27 | 矿山开发中心研究所 | Tunnel, master tunnel, ore deposit, passage and other underground secret tunnel emit the method for blocking of water |
| CN110185448A (en) * | 2019-05-19 | 2019-08-30 | 中铁十九局集团矿业投资有限公司 | A kind of ground fracturing and underground blasting control deep orebody rock burst method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN85106979A (en) * | 1985-09-16 | 1987-04-01 | 矿山开发中心研究所 | Natural and the following method of cheating current in cave, the tunnel in artificially of shutoff |
| CN87103870A (en) * | 1986-04-17 | 1988-01-27 | 矿山开发中心研究所 | Tunnel, master tunnel, ore deposit, passage and other underground secret tunnel emit the method for blocking of water |
| CN110185448A (en) * | 2019-05-19 | 2019-08-30 | 中铁十九局集团矿业投资有限公司 | A kind of ground fracturing and underground blasting control deep orebody rock burst method |
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