CN113217043A - Efficient and rapid plugging method and construction method for water source with water inrush fault water guide zone - Google Patents
Efficient and rapid plugging method and construction method for water source with water inrush fault water guide zone Download PDFInfo
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Abstract
The invention discloses a high-efficiency and rapid plugging method and a construction method for a water source with a water-inrush fault zone, wherein the method comprises the following steps: s1: presuming the position of the water-guiding fault zone, and distributing main holes in a plane two-dimensional included angle meter according to the direction forming an included angle of 45-90 degrees with the trend of the water-guiding fault zone to ensure that the main holes are orthogonal or oblique to the drilling track and the trend of the fault, and pouring aggregate to form a main hole plugging wall after the main holes are intersected with the actual water-guiding fault zone, so as to continue drilling the main holes after the required plugging effect is achieved; s2: at least two sides of the main hole are respectively provided with branch holes, and the branch holes drill towards the pinch-out position of the presumed water guiding fault zone; if the branch hole meets the actual water-flowing fault fracture development zone, pouring aggregate and grouting to form a branch hole plugging wall; and if the branch holes do not meet the actual water flowing fault fracture development zone, constructing a plurality of branch holes at intervals of 20-30 m close to the main holes until the branch holes meet the actual water flowing fault fracture development zone. Effectively shortens the treatment time and reduces the treatment cost.
Description
Technical Field
The invention belongs to the technical field of mine water disaster treatment, and relates to a high-efficiency and rapid plugging method and a construction method for a water source with a water-diversion fault zone and water inrush.
Background
Along with the extension of coal mining to deep parts, the coal face bottom plate is increasingly seriously threatened by high water pressure, and a large water inrush disaster of the mine bottom plate is easily caused under the condition of the existence of a hidden water guide structure. The water guide fault is a typical bottom plate hidden structure, has special hydrogeological significance, can play the roles of a water storage space, a water collection gallery and a water guide channel under certain conditions, has the characteristics of high concealment, outburst and destructiveness and the like in water inrush disasters, and has great harm to safety production of coal mines and safety of underground personnel.
With the high-intensity mining, shallow coal resources in the eastern area of China are gradually exhausted, most of mine mining activities are continuously extended to depth in order to guarantee the stable development of national economy, the threat of the Ordovician limestone confined water from the coal system bottom plate is gradually increased under the conditions of high ground stress and high water pressure, if a hidden water guide fault exists on the bottom plate, the mine is likely not to disclose the hidden fault of the bottom plate in the roadway development stage, but the mining disturbance influences the bottom plate to generate a mining broken zone which is communicated with the hidden water guide fault below the mine in the mining stage. At the moment, the fault serves as a water guide channel to communicate with a coal face, and the water quantity of the strong water-rich aquifer of the bottom plate is guided into the face to cause a large water inrush accident.
Fault development is concealed and is not easy to be accurately detected by conventional geophysical prospecting and drilling means, and fault water inrush is often characterized by large water quantity, strong destructiveness and high casualty rate, so that quick treatment after water inrush is particularly important. The conventional method generally utilizes a straight hole to perform grouting filling on the water guiding fault zone to plug a water inrush channel, but has the following problems: (1) because the development range of a plurality of aquifers of the large fault communication is large in the vertical direction, the time for completely plugging the whole fault is long; (2) a plurality of medium and small faults are generally developed around a large water guide fault to form a water guide fault zone, the water guide fault zone has the function of a water guide channel, but part of faults guide water and part of faults do not guide water, the straight holes are used for probing the water inrush channel in a point mode, the accurate positions of the faults are difficult to probe at one time, a plurality of straight holes are usually required to be constructed, the probing efficiency is low, the cost is high, the emergency rescue speed (3) is seriously influenced, the aggregate and slurry can not be blocked under the condition of high water pressure, the traditional aggregate pouring and grouting process can not control the diffusion distance of aggregate and slurry, the aggregate and slurry enter a goaf to cause material waste, and the treatment effect is influenced. In order to solve the defects of long construction period, high construction difficulty, high cost, slow mine production recovery and the like of the traditional method, a novel method for quickly blocking water after water inrush of a water diversion fault zone is needed to be provided.
Disclosure of Invention
The invention aims to provide a high-efficiency and rapid plugging method and a construction method for a water source with water inrush in a water-guiding fault zone, which solve the problems of low treatment efficiency, high construction difficulty and high cost of the water inrush in the fault zone in the prior art, effectively shorten the treatment time and reduce the treatment cost.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a high-efficiency rapid plugging method for a water source with water inrush fault in a water diversion fault zone comprises the following steps:
s1: presuming the position of the water-guiding fault zone, and arranging main holes in a plane two-dimensional included angle meter according to the direction forming an included angle of 45-90 degrees with the trend of the water-guiding fault zone to ensure that the main holes are at least vertically or obliquely intersected with the water-guiding fault zone, pouring aggregate after the main holes are intersected with the actual water-guiding fault zone to form a main hole plugging wall, and continuing drilling the main holes until the bottom of the main hole is 20-30 m outside the boundary of the actual water-guiding fault zone after the required plugging effect is achieved;
s2: at least two sides of the main hole are respectively provided with branch holes, and the branch holes drill towards the pinch-out position of the presumed water guiding fault zone; if the branch hole meets an actual water diversion fault fracture development zone, pouring aggregate and grouting to form a branch hole plugging wall; and if the branch holes do not meet the actual water flowing fault fracture development zone, constructing a plurality of branch holes at intervals of 20-30 m close to the main holes until the branch holes meet the actual water flowing fault fracture development zone.
Optionally, the main hole and the branch hole are both horizontal holes.
Optionally, each water inrush aquifer is provided with at least one main hole and a plurality of branch holes.
Optionally, the pouring aggregate comprises:
pouring gravels with the particle size of 0-5 mm, pouring stones with the particle size of 10-20 mm after stabilization, and pouring the stones with the particle size of 10-15 mm when the water level of the water-inrush water source aquifer rises; in the process of pouring aggregate, the water inflow Q is less than or equal to 100m3Stopping pouring at the time of/h to prepare grouting.
Optionally, the grouting includes: selecting cement with the specific gravity of 1.5-1.6, gradually increasing the cement grouting specific gravity, and reducing grouting flow until the grouting pressure reaches the design final pressure and waits for setting after lasting for 15-30 min;
the final pressure is 1.5-2 times of the hydrostatic pressure of the water-bearing layer of the grouting section.
Optionally, sweeping the hole to the bottom of the hole for a water pressing test, and finishing the grouting if the water permeability is less than 1 Lu; if the water permeability is more than 1Lu, repeatedly grouting until the water permeability is less than 1 Lu;
the water permeability is determined according to equation 1: q is Q/(pL), wherein Q is water permeability, Lu; q is the flow of water per minute, L/min; p is the pressure acting in the test section, MPa; l is the length m of the test segment.
A construction method for efficiently and quickly plugging a water source with water inrush in a water guide fault zone comprises the following steps:
s1: constructing a main hole and forming a main hole plugging wall;
presuming the position of the water-guiding fault zone, and arranging main holes in a plane two-dimensional included angle meter according to the direction forming an included angle of 45-90 degrees with the trend of the water-guiding fault zone to ensure that the main holes are at least vertically or obliquely intersected with the water-guiding fault zone, pouring aggregate after the main holes are intersected with the actual water-guiding fault zone to form a main hole plugging wall, and continuing drilling the main holes until the bottom of the main hole is 20-30 m outside the boundary of the actual water-guiding fault zone after the required plugging effect is achieved;
s2: constructing branch holes and forming a fracture development zone plugging wall;
at least two sides of the main hole are respectively provided with branch holes, and the branch holes drill towards the pinch-out position of the presumed water guiding fault zone; if the branch hole meets an actual water diversion fault fracture development zone, pouring aggregate and grouting to form a branch hole plugging wall; and if the branch holes do not meet the actual water flowing fault fracture development zone, constructing a plurality of branch holes at intervals of 20-30 m close to the main holes until the branch holes meet the actual water flowing fault fracture development zone.
Optionally, the pouring aggregate comprises:
pouring gravels with the particle size of 0-5 mm, pouring stones with the particle size of 10-20 mm after stabilization, and pouring the stones with the particle size of 10-15 mm when the water level of the water-inrush water source aquifer rises; in the process of pouring aggregate, the water inflow Q is less than or equal to 100m3Stopping pouring at the time of/h to prepare grouting.
Optionally, the grouting includes: selecting cement with the specific gravity of 1.5-1.6, gradually increasing the cement grouting specific gravity, and reducing grouting flow until the grouting pressure reaches the design final pressure and waits for setting after lasting for 15-30 min;
the final pressure is 1.5-2 times of the hydrostatic pressure of the water-bearing layer of the grouting section.
Optionally, sweeping the hole to the bottom of the hole for a water pressing test, and finishing the grouting if the water permeability is less than 1 Lu; if the water permeability is more than 1Lu, repeatedly grouting until the water permeability is less than 1 Lu;
the water permeability is determined according to equation 1: q is Q/(pL), wherein Q is water permeability, Lu; q is the flow of water per minute, L/min; p is the pressure acting in the test section, MPa; l is the length m of the test segment.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention utilizes the ground directional drill to quickly plug the water source with water inrush in the fault zone, and the traditional method for plugging the water inrush in the fault zone has the defects of long construction period, high construction difficulty, higher cost, slow mine production recovery and the like. According to the invention, the water inrush water source is directly blocked by aggregate pouring and grouting reinforcement, the water source is cut off from the source, the aggregate and the slurry can form a water blocking wall to block the water inrush water source around the fault zone, and a water blocking wall blocking water inrush channel is formed in the fault zone along the water flow direction, so that the flowing water source is finally changed into still water, the purpose of rapidly blocking the water inrush of the water guiding fault zone is achieved, and the rapid re-engineering and re-production of a coal mine are realized;
2. the method provided by the invention greatly improves the efficiency of exploring and plugging the fault zone: the straight hole is detected in a point shape, so that the blindness is high, and the fault zone range is difficult to be quickly defined. The horizontal hole groups can simultaneously block a plurality of aquifers communicated with the fault zone, and the blocking mode is that the whole development range of the water-guiding fault zone is covered in a planar mode, so that a blind zone is not left. The purpose of quickly and comprehensively blocking the water burst water source can be achieved only by a small number of drilled holes, and the drilled holes not only are water blocking drilled holes, but also can play a role in checking and reinforcing;
3. the method is suitable for various mines with water inrush hazard of the hidden water-conducting fault zone of the bottom plate, and is particularly suitable for plugging water inrush water sources under the condition that the water-conducting fault zone communicates with a plurality of aquifers of the bottom plate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a flow chart of a water-guiding fault water inrush source efficient and rapid plugging technology;
FIG. 2 is a schematic perspective view of a water source plug with water bursting in a water guiding fault zone;
FIG. 3 is a schematic plan view of a water source plug with water bursting in a water guiding fault layer;
1-working face, 2-first hole group, 3-second hole group, 4-sandstone aquifer, 5-Ordovician limestone aquifer, 6-first main hole, 61-first branch hole, 62-second branch hole, 63-third branch hole, 7-second main hole, 71-fourth branch hole, 72-fifth branch hole, 8-water blocking wall, 9-presumed fault zone and 10-actual fault zone;
the arrows in fig. 3 indicate the water flow direction.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of the present invention, not all embodiments, and do not limit the invention in any way, and all technical solutions using the embodiments, including simple changes made to the embodiments, belong to the protection scope of the present invention.
So that the manner in which the above recited features of the present invention can be understood and appreciated, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.
The present invention will be described in detail below with reference to examples and the accompanying drawings.
With reference to fig. 1, the method for efficiently and rapidly plugging a water source with water bursting in a water guiding fault zone comprises the following steps: s1: presuming the position of the water-guiding fault zone, and arranging main holes in a plane two-dimensional included angle meter according to the direction forming an included angle of 45-90 degrees with the trend of the water-guiding fault zone to ensure that the main holes are at least vertically or obliquely intersected with the water-guiding fault zone, pouring aggregate after the main holes are intersected with the actual water-guiding fault zone to form a main hole plugging wall, and continuing drilling the main holes until the bottom of the main hole is 20-30 m outside the boundary of the actual water-guiding fault zone after the required plugging effect is achieved; s2: at least two sides of the main hole are respectively provided with branch holes, and the branch holes drill towards the pinch-out position of the presumed water guiding fault zone; if the branch hole meets an actual water diversion fault fracture development zone, pouring aggregate and grouting to form a branch hole plugging wall; and if the branch holes do not meet the actual water flowing fault fracture development zone, constructing a plurality of branch holes at intervals of 20-30 m close to the main holes until the branch holes meet the actual water flowing fault fracture development zone. The presumed water guiding fault zone refers to that the approximate position of the water guiding fault zone is deduced according to the actual exploration condition, and the actual water guiding fault zone refers to the water guiding fault zone actually encountered in the construction process, and the water guiding fault zone and the actual water guiding fault zone have certain deviation; the water-flowing fault fracture development zone refers to a cut layer, a separation layer and a fracture gap which are generated near an actual water-flowing fault zone, the zone cannot penetrate sand but can penetrate water, and a falling zone and a fracture zone are collectively called as a fracture development zone.
In the present disclosure, the main bore and the branch bore are both horizontal bores. The range of fault investigation and treatment is wide, one horizontal hole is linear investigation, a plurality of horizontal holes can quickly form surface investigation, the construction period is shortened, and the plugging effect is obvious.
In the present disclosure, each water inrush aquifer is provided with at least one main hole and a plurality of branch holes. When the construction is implemented, when the fault communicates a plurality of water-inrush aquifers, the construction can be carried out simultaneously, the construction period is shortened, and the plugging efficiency is improved.
The method comprises the following specific steps:
step 1: deducing fault development occurrence and fault properties according to the water inrush condition of the working face and by combining the early-stage exploration data; according to the approximate position of the fault zone, a reasonable site is selected, and a directional hole group is arranged at a proper position on the upstream of the groundwater flow direction fault zone. Wherein, N directional hole groups are constructed simultaneously. And 3-M drill holes are respectively constructed in each hole group. Wherein the number N of the hole groups is determined by the number of main aquifers communicated by the water-guiding fault zone. Each hole group is respectively used for plugging water inrush sources of different aquifers. The hole group mainly comprises a main hole and a branch hole.
Step 2: firstly, constructing a main hole, wherein the included angle between the main hole and the presumed fault strike is 45-90 degrees, preparing to pour aggregate by taking off a drilling meeting fault zone in the drilling process,
and step 3: and selecting aggregates with different particle sizes to fill the aquifer where the water inrush source is located, so as to form a plugging section framework. (1) Sand stones with the particle size of 0-5 mm are poured, so that the purposes of stabilizing an underground pouring channel and preventing hole blockage are achieved; (2) and after the aggregate migration channel is stabilized, filling stones with the particle size of 10-20 mm, and adjusting the aggregate filling flow and the size of the filter screen according to the water inflow of the working surface and the change of a negative pressure meter of a ground orifice in the aggregate filling process, so that air is prevented from being mixed as much as possible in the filling process, the phenomenon that the pressure in the hole is too high is avoided, and the guarantee is provided for normal aggregate filling. (3) When the water level in the water level observation hole of the water-inrush water source aquifer rises, stones with the particle size of 10-15 mm are poured.
In the process of pouring aggregate, gushing waterQuantity Q is less than or equal to 100m3And when the pressure is in the second period,/h, the main framework of the water plugging wall is formed, the pipeline flow is changed into seepage flow, and the pouring is stopped to prepare for grouting.
And 4, step 4: and carrying out single-slurry grouting on the cement. And selecting the specific gravity of the cement to be 1.5-1.6, injecting cement slurry into the drill hole through a ground grouting pump to gradually increase the grouting specific gravity and reduce the grouting flow until the grouting pressure reaches the design final pressure and lasts for 15-30 min, and then waiting for setting.
The final pressure is 1.5-2 times of the hydrostatic pressure of the water-bearing layer of the grouting section;
the grouting proportion is gradually improved in the grouting process, the grouting flow is reduced, excessive diffusion of the grout along the water flow direction is prevented, and the effects of reinforcing the main body framework of the water plugging wall and plugging fine cracks are achieved.
And 5: carrying out a pressurized water test after the hole is swept to the bottom of the hole, and finishing the grouting if the water permeability is less than 1 Lu; if the water permeability is more than 1Lu, repeating the step 4 until the water permeability is less than 1 Lu.
The water permeability is determined according to equation 1: q is Q/(pL), wherein Q is water permeability (Lu); q is flow per minute (L/min); p is the pressure (MPa) acting in the test section; l is the length (m) of the test segment
Step 6: continuously drilling to the final hole position, and if the drilling fluid leakage is more than 5m3And h, repeating the steps 3-5 under the condition of severe stratum breakage.
Wherein the position of the final hole is 20-30 m outside the fault zone boundary.
And 7: and (3) sidetracking at a proper position of the main hole, respectively constructing 2-M branch holes, reinforcing and plugging the aquifer water inrush source in a fan shape, checking the plugging effect, constructing the branch holes to the presumed fault pinch-out position, and repeating the steps 4-5 after drilling a crack development zone outside the boundary of the fault zone.
And if the crack development zone is not drilled in the branch hole construction process, constructing the branch hole track to be 20m inclined to the main hole direction, and repeating the steps 4-5 after drilling the crack development zone outside the boundary of the fault zone.
The method for determining the fissure development zone outside the boundary of the fault zone comprises the following steps: (1) no serious hole collapse or lithologic disorder (2) large amount of drilling fluid is leaked out, and the leakage amount exceeds 20m3/h。
And 8: after the water blocking wall is built, the underground water inflow is obviously reduced, and water burst in the working face is drained until the water level is below the safe water level.
In addition, the invention also provides a high-efficiency and rapid plugging construction method of the water source with the water inrush fault, which comprises the following steps:
s1: constructing a main hole and forming a main hole plugging wall; presuming the position of the water-guiding fault zone, and arranging main holes in a plane two-dimensional included angle meter according to the direction forming an included angle of 45-90 degrees with the trend of the water-guiding fault zone, wherein the main holes are intersected with the actual water-guiding fault zone and then poured with aggregate to form a main hole plugging wall, and continuing drilling the main holes until the bottom of the main hole is 20-30 m outside the boundary of the actual water-guiding fault zone after the required plugging effect is achieved;
s2: constructing branch holes and forming a fracture development zone plugging wall; at least two sides of the main hole are respectively provided with branch holes, and the branch holes drill towards the pinch-out position of the presumed water guiding fault zone; if the branch hole meets the actual water-flowing fault fracture development zone, pouring aggregate and grouting to form a branch hole plugging wall; and if the branch holes do not meet the actual water flowing fault fracture development zone, constructing a plurality of branch holes at intervals of 20-30 m close to the main holes until the branch holes meet the actual water flowing fault fracture development zone.
From the construction angle, the technical scheme of the invention has the advantages of large ground field selectivity, high efficiency, less material consumption and low treatment cost, and can simultaneously treat a plurality of water inrush sources at one time.
The first embodiment is as follows:
the average thickness of the coal seam of the No. 3 coal seam of the two-stacked-series Shanxi group in certain coal mining is 8.5m, and the comprehensive drainage capacity of a mine is about 1200m3H is used as the reference value. During the tunneling period and before the recovery of a certain working face, geophysical prospecting and drilling are adopted for detection, faults exist near the cutting hole of the working face, and a water-rich abnormal area is not found. After a certain distance of extraction, water inrush occurs, and the initial water quantity is 50m3After the water amount is gradually increased to 1200m3The mine three horizontal mining areas are submerged stably, and the stable water inrush amount is about 1500m3H is used as the reference value. After water inrush occurs for 24 hours, the water level of the Ordovician limestone observation holes of the mine and the surrounding mines drops by 1-4 m, and the water inrush source is preliminarily judged to be Ordovician limestone aquifer water and is subjected to water inrushThe water channel is a hidden water guide structure at the deep part of the coal seam floor. The analysis reason is mainly that in the original rock state, the fracture zone crack is relatively closed, the water-rich property is poor, and the actual fall of the fault is larger than the previous exploration result. Under the influence of mining during the stoping process, a large number of cracks are generated on the bottom plate of the coal bed, meanwhile, the fault zone is gradually activated to communicate a plurality of water-bearing layers under the No. 3 coal, wherein the strong water-rich Ordovician ash water is quickly filled to the activated water guide zone under the action of high water pressure and enters the working face through the fault zone to cause continuous water burst. The water inflow is not obviously reduced by adopting the means of underground drilling diversion, drilling grouting and the like for treatment.
The method for efficiently and quickly plugging the water-guiding fault water inrush source provided by the invention is used for treating the water inrush, and comprises the following steps:
step 1: according to the water inrush situation of the working face 1 and the early exploration data, the development occurrence and fault properties of the fault zone 9 are presumed; according to the approximate position of the fault zone, a reasonable site is selected, and 2 directional hole groups are arranged at the proper position of the upstream of the groundwater flow direction fault zone.
Step 2: and simultaneously constructing 2 directional hole groups, drilling a first hole group 2 to a casing pipe with a downward hole diameter of 244.5mm and a wall thickness of 8.05mm in bedrock at one time, drilling to a top plate of a coal-bottom sandstone aquifer 4, drilling to a casing pipe with a downward hole diameter of 177.8mm and a wall thickness of 8.94mm, drilling a first main hole 6 and an inferred fault zone 9 at an included angle of 58 degrees, generating drilling fluid loss return when drilling to 1100m, continuing to drill for 5m forward due to top leakage, and still losing the drilling fluid and accompanying hole collapse, thereby indicating that the drilling meets the fault zone and starts to drill to prepare for pouring aggregate. The second hole group 3 drills to a casing pipe with the underground hole diameter of 244.5mm and the wall thickness of 8.05mm in bedrock at one time, drills to the top plate of the Ordovician limestone aquifer 5, drills to the casing pipe with the underground hole diameter of 177.8mm and the wall thickness of 8.94mm, the second main hole 7 and the inferred fault zone 9 form an included angle of 62 degrees, drilling fluid is lost and returns when the hole drills to 1150m, the hole continues to drill to 10m forward due to top leakage, the drilling fluid is still lost and the stratum is seriously crushed, and the situation that the hole drills to prepare for pouring aggregate when the fractured zone is drilled is indicated.
And step 3: and selecting aggregates with different particle sizes to be injected into the drill hole through a ground grouting pump to fill the aquifer where the water inrush source is located. Filling sand stone with the particle size of 0-5 mm and filling 1500m3The rear water inflow is reduced to 800m3The/h is kept stable, which indicates that the perfusion channel is stable; pouring 1-2 stones, adjusting the flow of the poured aggregates and the size of the filter screen according to the water inflow of the working surface and the change of a negative pressure meter at the ground orifice in the process of pouring the aggregates, and pouring 1200m stones 1-2 m3After/h, the water level of the observation hole rises and the water inflow is reduced to 300m3H; beginning to pour 2-4 stones, 1000m3After the water level of the observation hole rises, the water inflow is reduced to 80m3And h, keeping the stability, stopping pouring the aggregate, and preparing for grouting.
And 4, step 4: and (5) performing cement grouting. Pure cement single slurry is injected into the drill hole through a ground grouting pump, the specific gravity of the slurry is 1.5, the flow rate is 500L/min, when the grouting pressure reaches 2MPa at 3000t of grouting, the specific gravity is increased to 1.55, and the flow rate is reduced to 320L/min. When the grouting pressure reaches 4MPa at 4100t, the specific gravity of the slurry is 1.55, the grouting flow is reduced to 180L/min, when the grouting pressure reaches 5MPa at 5300t, the specific gravity is increased to 1.6, and the grouting flow is reduced to 52L/min. When the grouting is 6000t, the grouting pressure reaches the design final pressure of 6MPa and is continued for 30min, the grouting is finished, the grouting is stopped, and the water inflow is reduced to 50m3The setting time is 48h, and the designed final pressure is 1.5 times of the water pressure of an aquifer of the grouting section;
and 5: and (3) sweeping the hole to the bottom of the hole to perform a water pressing test, wherein the water permeability is determined according to a formula 1: q is Q/(pL) wherein Q is water permeability (Lu); q is flow per minute (L/min), 250L/min; p is the pressure (MPa) acting in the test section, and 2MPa is taken; l is the length (m) of the segment (m)500 m. And after calculation, q is 0.25Lu, and the grouting is considered to be finished when the water permeability is less than 1 Lu.
Step 6: continuously drilling to the position 1250m of the final hole, wherein the loss of the drilling fluid is not more than 5m3In the case of severe formation fracture.
And 7: and (3) sidetrack drilling is carried out on the proper position of the first main hole 6 of the first hole group 2 to construct a first branch hole 61, the first branch hole 61 is drilled to a final hole 1200m towards the pinch-out position of the presumed fault zone 9, no drilling fluid consumption or stratum crushing phenomenon occurs, and the drilling track is indicated to be outside the range of the fault zone fracture development zone, and hole sealing is carried out.
And 8: the second branch hole 62 is sidetrack-drilled in the first main hole 6 of the first hole group 2 at a proper position to the main holeThe hole direction deviates 25m, the second branch hole 62 drills to 1050m, the drilling fluid leakage is 30m3And h, indicating that the drilling track is located in a fracture development zone outside the actual fault zone 10, and repeating the steps 4-5. The water inflow is reduced to 30m3/h
And step 9: and a third branch hole 63 is sidetrack-constructed at a proper position of the first main hole 6 of the first hole group 2 to block the water inrush source of the aquifer. The third branch hole 63 drills to 1080m drilling fluid leakage amount of 25m3And h, indicating that the drilling track is positioned in a fracture development zone outside the fault zone, and repeating the steps 4-5. The water inflow is reduced to 20m3/h。
Step 10: and after the first hole group 2 is finished, constructing the branch holes of the second hole group 3, wherein the second hole group 3 comprises 2 branch holes, and repeating the steps 7-9 for the fourth branch hole 71 and the fifth branch hole 72 respectively.
Step 11: after the grouting of the first hole group 2 and the second hole group 3 is finished, the water blocking wall 8 in the main aquifer is built, and the residual water inflow of the working surface is 3m3And/h, carrying out drainage in the working face 1. In the process of draining, intermittent water drainage is adopted, water drainage is carried out for 2 hours, and suspension is carried out for 0.5 hour. Until the water level is below the safe water level-1000 m.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A high-efficiency rapid plugging method for a water source with water inrush fault in a water diversion fault zone is characterized by comprising the following steps:
s1: presuming the position of the water-guiding fault zone, and arranging main holes in a plane two-dimensional included angle meter according to the direction forming an included angle of 45-90 degrees with the trend of the water-guiding fault zone to ensure that the main holes are at least vertically or obliquely intersected with the water-guiding fault zone, pouring aggregate after the main holes are intersected with the actual water-guiding fault zone to form a main hole plugging wall, and continuing drilling the main holes until the bottom of the main hole is 20-30 m outside the boundary of the actual water-guiding fault zone after the required plugging effect is achieved;
s2: at least two sides of the main hole are respectively provided with branch holes, and the branch holes drill towards the pinch-out position of the presumed water guiding fault zone; if the branch hole meets an actual water diversion fault fracture development zone, pouring aggregate and grouting to form a branch hole plugging wall; and if the branch holes do not meet the actual water flowing fault fracture development zone, constructing a plurality of branch holes at intervals of 20-30 m close to the main holes until the branch holes meet the actual water flowing fault fracture development zone.
2. The method for efficiently and rapidly plugging a water source with water inrush fault of claim 1, wherein the main hole and the branch holes are horizontal holes.
3. The method for efficiently and quickly plugging a water-bursting-water source with a water-bursting-water fault of claim 1 or 2, wherein each water-bursting-water-containing layer is provided with at least one main hole and a plurality of branch holes.
4. The method for efficiently and quickly plugging a water-inrush water source of a water-conducting fault zone according to claim 1 or 2, wherein the pouring aggregate comprises:
pouring gravels with the particle size of 0-5 mm, pouring stones with the particle size of 10-20 mm after stabilization, and pouring the stones with the particle size of 10-15 mm when the water level of the water-inrush water source aquifer rises; in the process of pouring aggregate, the water inflow Q is less than or equal to 100m3Stopping pouring at the time of/h to prepare grouting.
5. The method for efficiently and rapidly plugging a water source with water bursting of a water fault zone as claimed in claim 4, wherein the grouting comprises the following steps: selecting cement with the specific gravity of 1.5-1.6, gradually increasing the cement grouting specific gravity, reducing grouting flow until grouting pressure reaches design final pressure and lasts for 15-30 min, and stopping grouting;
the final pressure is 1.5-2 times of the hydrostatic pressure of the water-bearing layer of the grouting section.
6. The method for efficiently and quickly plugging a water source with water inrush at a water flowing fault zone according to claim 5, wherein a water pressing test is carried out from a hole to the bottom of the hole, and the grouting is finished if the water permeability is less than 1 Lu; if the water permeability is more than 1Lu, repeatedly grouting until the water permeability is less than 1 Lu;
the water permeability is determined according to equation 1: q is Q/(pL), wherein Q is water permeability, Lu; q is the flow of water per minute, L/min; p is the pressure acting in the test section, MPa; l is the length m of the test segment.
7. A high-efficiency rapid plugging construction method for a water source with water inrush in a water guide fault zone is characterized by comprising the following steps:
s1: constructing a main hole and forming a main hole plugging wall;
presuming the position of the water-guiding fault zone, and arranging main holes in a plane two-dimensional included angle meter according to the direction forming an included angle of 45-90 degrees with the trend of the water-guiding fault zone to ensure that the main holes are at least vertically or obliquely intersected with the water-guiding fault zone, pouring aggregate after the main holes are intersected with the actual water-guiding fault zone to form a main hole plugging wall, and continuing drilling the main holes until the bottom of the main hole is 20-30 m outside the boundary of the actual water-guiding fault zone after the required plugging effect is achieved;
s2: constructing branch holes and forming a fracture development zone plugging wall;
at least two sides of the main hole are respectively provided with branch holes, and the branch holes drill towards the pinch-out position of the presumed water guiding fault zone; if the branch hole meets an actual water diversion fault fracture development zone, pouring aggregate and grouting to form a branch hole plugging wall; and if the branch holes do not meet the actual water flowing fault fracture development zone, constructing a plurality of branch holes at intervals of 20-30 m close to the main holes until the branch holes meet the actual water flowing fault fracture development zone.
8. The efficient and rapid plugging construction method of the water-breaking zone water-inrush source according to claim 7, wherein the pouring aggregate comprises:
pouring gravels with the particle size of 0-5 mm, pouring stones with the particle size of 10-20 mm after stabilization, and pouring the stones with the particle size of 10-15 mm when the water level of the water-inrush water source aquifer rises; in the process of pouring aggregate, the water inflow Q is less than or equal to 100m3Stopping pouring at the time of/h to prepare grouting.
9. The efficient and rapid plugging construction method of the water-breaking zone water-inrush source according to claim 8, characterized in that the grouting comprises: selecting cement with the specific gravity of 1.5-1.6, gradually increasing the cement grouting specific gravity, reducing grouting flow until grouting pressure reaches design final pressure and lasts for 15-30 min, and stopping grouting;
the final pressure is 1.5-2 times of the hydrostatic pressure of the water-bearing layer of the grouting section.
10. The efficient and rapid plugging construction method for the water-inrush water source of the water diversion fault zone according to claim 7, wherein a water pressure test is performed from hole sweeping to hole bottom, and the grouting is finished if the water permeability is less than 1 Lu; if the water permeability is more than 1Lu, repeatedly grouting until the water permeability is less than 1 Lu;
the water permeability is determined according to equation 1: q is Q/(pL), wherein Q is water permeability, Lu; q is the flow of water per minute, L/min; p is the pressure acting in the test section, MPa; l is the length m of the test segment.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932877A (en) * | 2021-09-30 | 2022-01-14 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Karst water level prediction method for mining area and terminal equipment |
| CN116291398A (en) * | 2022-09-07 | 2023-06-23 | 中煤科工开采研究院有限公司 | Comprehensive detection method for height of water-guiding fracture zone under condition of shallow foundation rock of shallow buried thick soil layer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003003797A (en) * | 2001-06-26 | 2003-01-08 | Kumagai Gumi Co Ltd | Draining method for use in extra-thin lining method |
| JP2008303941A (en) * | 2007-06-06 | 2008-12-18 | Sekisui Chem Co Ltd | Grout hole closing structure for tube, and structure and method for testing water tightness of grout hole |
| KR101442822B1 (en) * | 2014-01-02 | 2014-09-26 | (주)동운엔지니어링 | Apparatus for inserting steel pipe and simultaneous horizontal high pressure jet-grouting in a tunnel supporting, and Method for inserting steel pipe and high pressure jet grouting with it |
| CN107044289A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of water damage prevention and controls of bored grouting closure overlying strata water producing fractures main channel |
| CN108894727A (en) * | 2018-07-05 | 2018-11-27 | 中国矿业大学 | The water-retaining method of ground level directional drilling slip casting closure overlying strata water producing fractures main channel |
| CN110761814A (en) * | 2019-10-30 | 2020-02-07 | 中煤科工集团西安研究院有限公司 | Roof water control method based on presplitting and grouting modification |
| CN112392431A (en) * | 2019-08-19 | 2021-02-23 | 陈存强 | Technology for preventing and treating water damage of coal seam roof by dynamic pressure-maintaining grouting and plugging of horizontal long drill hole in mining fracture zone |
-
2021
- 2021-05-28 CN CN202110589853.3A patent/CN113217043A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003003797A (en) * | 2001-06-26 | 2003-01-08 | Kumagai Gumi Co Ltd | Draining method for use in extra-thin lining method |
| JP2008303941A (en) * | 2007-06-06 | 2008-12-18 | Sekisui Chem Co Ltd | Grout hole closing structure for tube, and structure and method for testing water tightness of grout hole |
| KR101442822B1 (en) * | 2014-01-02 | 2014-09-26 | (주)동운엔지니어링 | Apparatus for inserting steel pipe and simultaneous horizontal high pressure jet-grouting in a tunnel supporting, and Method for inserting steel pipe and high pressure jet grouting with it |
| CN107044289A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of water damage prevention and controls of bored grouting closure overlying strata water producing fractures main channel |
| CN108894727A (en) * | 2018-07-05 | 2018-11-27 | 中国矿业大学 | The water-retaining method of ground level directional drilling slip casting closure overlying strata water producing fractures main channel |
| CN112392431A (en) * | 2019-08-19 | 2021-02-23 | 陈存强 | Technology for preventing and treating water damage of coal seam roof by dynamic pressure-maintaining grouting and plugging of horizontal long drill hole in mining fracture zone |
| CN110761814A (en) * | 2019-10-30 | 2020-02-07 | 中煤科工集团西安研究院有限公司 | Roof water control method based on presplitting and grouting modification |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113932877A (en) * | 2021-09-30 | 2022-01-14 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Karst water level prediction method for mining area and terminal equipment |
| CN113932877B (en) * | 2021-09-30 | 2023-12-22 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Karst water level prediction method for mining area and terminal equipment |
| CN116291398A (en) * | 2022-09-07 | 2023-06-23 | 中煤科工开采研究院有限公司 | Comprehensive detection method for height of water-guiding fracture zone under condition of shallow foundation rock of shallow buried thick soil layer |
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