CN111852327A

CN111852327A - Water outlet and control method for filling and drilling construction

Info

Publication number: CN111852327A
Application number: CN202010817740.XA
Authority: CN
Inventors: 汪宏伟; 周树光; 阚忠辉; 陈刚; 陈资南; 石�诚; 赵锐; 俞沧海; 杨锋
Original assignee: Anhui Tongguan Lujiang Mining Co ltd
Current assignee: Anhui Tongguan Lujiang Mining Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2020-10-30
Anticipated expiration: 2040-08-14
Also published as: CN111852327B

Abstract

The invention provides a water outlet and water treatment method for filling and drilling construction, which is characterized in that a non-return device is arranged at the lower end of a filling sleeve by designing a filling and drilling water treatment scheme of hole sealing, through hole penetration, high-pressure grouting, positioning of the filling sleeve and hole sweeping; positioning the filling sleeve from bottom to top in the axial direction and placing the filling sleeve into the drill hole at the through hole position, so that the check device is arranged at the bottom end of the cement layer; then cement paste is configured according to the volume of the gap and is filled into the filling sleeve, and clear water is filled into the filling sleeve by force, so that the cement paste overflows to a cement layer from the filling sleeve through a non-return device until the cement paste returns out of the annular gap between the outer wall of the filling sleeve and the drill hole, the pump is stopped, and the pump is withdrawn after the cement paste is solidified for 48 hours, thereby realizing that the annular gap between the outer wall of the filling sleeve and the drill hole is completely sealed by high-strength cement; thereby ensure to fill the pipeline stagnant water and can work for a long time safely to guarantee that the filling system can be on time, normal, debugging and operation, can solve cyclic annular intermittent type and sluicing problem, reasonable in design, economical and practical.

Description

Water outlet and control method for filling and drilling construction

Technical Field

The invention relates to the field of mine filling drilling hole water outlet water control, in particular to a water outlet water control method in filling drilling hole construction.

Background

Filling and drilling are throats for conveying filling slurry from the ground surface to the underground, and practice proves that the method for conveying filling materials by drilling is an efficient, low-cost and simple-process mode, and the throat is widely applied as a vertical conveying pipeline for the filling slurry. However, when the filling drill hole is constructed in the presence of an underground high-pressure water source, how to effectively control water in the hole, reduce the potential safety hazard of the filling drill hole and prolong the service life of the filling drill hole is always a difficult point of the filling drill hole construction when meeting water.

Disclosure of Invention

The invention aims to provide a water outlet and control method for filling and drilling construction, and aims to solve the technical problem of annular intermittent water drainage of filling and drilling when underground high-pressure water sources are encountered in the filling and drilling construction.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a water outlet and control method for filling and drilling construction comprises the following steps:

s1, construction preparation: preparing each device or component in construction, leveling the field, removing impurities, and determining the position of a filling drill hole;

s2, drilling: drilling holes at the positions for filling the drilled holes through a drilling device, and cleaning and discharging residues in the drilled holes;

s3, sealing holes: adopting plant gum and a plugging agent to circularly punch the drill hole for half a day to plug the gap in the drill hole; then, punching the drill hole for half a day by using a chemical flushing liquid to flush residues in the drill hole; then, a high-pressure slurry pump is adopted to pour cement slurry into the drill hole, and the hole sealing of the drill hole is realized after the cement slurry is solidified for 72 hours;

s4, through holes: carrying out through holes on the cement layer at the hole sealing position to realize primary plugging of the aquifer; then, flushing the drill hole at the through hole position for half a day by using a chemical flushing fluid to flush residues in the drill hole;

s5, positioning and setting the filling sleeve: the lower end of the filling sleeve is provided with a check device; positioning the filling sleeve from bottom to top in the axial direction and placing the filling sleeve into the drill hole at the through hole position, wherein the check device is arranged at the bottom end of the cement layer; then cement paste is configured according to the volume of the gap and is filled into the filling sleeve, clear water is filled into the filling sleeve by a high-pressure slurry pump, so that the cement paste overflows from the filling sleeve to the cement layer through a check device until the cement paste returns from the annular gap between the outer wall of the filling sleeve and the drill hole, the pump is stopped until the cement paste is solidified for 48 hours, and the pump is removed, so that the annular gap between the outer wall of the filling sleeve and the drill hole is completely sealed by the high-strength cement;

s6, hole sweeping: and a small drill rod is matched with thick slurry to sweep the hole from the inside of the filling sleeve to the bottom, and residual cement residues in the sleeve are swept to ensure that the filling sleeve is clean, so that the next construction can be carried out.

As a further improvement of the invention, the steps 2-4 are repeated for a plurality of times before the step 5, and a plurality of circles of cement layers are formed on the outer layer of the filling casing.

As a further improvement of the invention, the check device comprises a base and a check valve; the base is provided with a plurality of through holes, and the through holes are communicated to the circumferential outer side edge through communicated channels; and a check valve is arranged on the channel.

As a further improvement of the invention, the lower end of the filling sleeve is circumferentially provided with an opening; the channel is communicated with the opening at the lower end of the filling casing pipe and is used for enabling cement paste in the filling casing pipe to enter a gap of the cement layer through the perforation, the channel and the opening in sequence.

As a further improvement of the invention, the filling sleeve has a size smaller than the size of the filling borehole.

As a further improvement of the invention, the chemical flushing liquid comprises cellulose and potassium humate.

As a further improvement of the invention, the vegetable gum is a delayed swelling gel particle.

Compared with the prior art, the invention has the beneficial effects that:

by designing the scheme of hole sealing, through hole penetration, high-pressure grouting, positioning of a filling sleeve and water control of filling and drilling of hole sweeping, the annular intermittent water drainage problem can be solved, and the water stopping of a filling pipeline is ensured, and the filling pipeline can work safely for a long time, so that a filling system can be ensured to be timely, normal, debugged and operated, and the filling system is reasonable in design, economical and practical.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of a filled borehole according to the present invention;

FIG. 2 is a top view of the fill borehole of the present invention;

FIG. 3 is a side view of the present invention;

FIG. 4 is a front view of the present invention;

the reference numbers in the figures illustrate:

1. an aqueous layer; 2. filling a sleeve; 21. opening a hole; 3. a non-return device; 31. a base; 311. perforating; 312. a channel; 32. a check valve; 4. and (5) a cement layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a water outlet and control method for filling and drilling construction by combining with attached drawings 1 to 4, and aims to solve the technical problem of annular intermittent water drainage of filling and drilling when the filling and drilling construction meets an underground high-pressure water source.

Specifically, the method comprises the following steps:

s4, through holes: carrying out through holes on the cement layer 4 at the hole sealing position to realize the preliminary plugging of the aquifer 1; then, flushing the drill hole at the through hole position for half a day by using a chemical flushing fluid to flush residues in the drill hole;

s5, positioning and setting the filling sleeve: the lower end of the filling sleeve 2 is provided with a non-return device 3; the filling sleeve 2 is axially positioned from bottom to top and is placed into the drill hole at the through hole position, and the check device is arranged at the bottom end of the cement layer 4; then cement paste is prepared according to the volume of the gap and is filled into the filling casing 2, and the cement paste overflows from the filling casing 2 to the cement layer 4 through a check device; then, strong clear water is poured into the filling casing 2 through a high-pressure slurry pump until cement slurry returns from the annular gap between the outer wall of the filling casing 2 and the drill hole, the pump is stopped, and the pump is withdrawn after the cement slurry is solidified for 48 hours, so that the annular gap between the outer wall of the filling casing 2 and the drill hole is completely sealed by high-strength cement;

s6, hole sweeping: a small drill rod is adopted to cooperate with thick slurry to sweep the hole from the inside of the filling casing 2 to the bottom, and residual cement residues in the casing are swept to ensure that the inside of the filling casing 2 is clean, so that the next construction can be carried out.

Further, the size of the filling sleeve 2 is slightly smaller than the size of the filling borehole.

Further, the chemical flushing liquid comprises cellulose and potassium humate, and the ratio of the cellulose to the potassium humate is 2: 8.

It should be noted that the fluidity of the rich water layer can be reduced when the drill hole is flushed with the chemical flushing fluid.

Further, the vegetable gum is a delayed swelling gel particle.

Preferably, the plant gum is wild plant Machilus paulownii wood powder.

Further, the check device 3 includes a base 31 and a check valve 32; a plurality of through holes 311 are formed in the base 31, and the through holes 311 are communicated to the circumferential outer side through communicated channels 312; the channel 312 is provided with a check valve 32.

Further, the lower end of the filling sleeve 2 is circumferentially provided with an opening 21; the passage 312 is communicated with the opening 21 at the lower end of the filling casing 2, and is used for enabling cement slurry in the filling casing 2 to enter the gap of the cement layer 4 through the perforation 311, the passage 312 and the opening 21 in sequence.

In another embodiment, different from the previous embodiment, the steps 2-4 are repeated several times before the step 5, and a plurality of circles of cement layer 4 are formed on the outer layer of the filling sleeve 2.

In one embodiment, the inner diameter of a filling drill hole is 250mm, the outer diameter of a filling casing 2 is 168mm, in order to effectively block water in a water-bearing stratum 1 from flowing into the drill hole, firstly, the plant gum and the plugging agent are adopted for circular punching for half a day, and large cracks in the drill hole are blocked as much as possible; then, adopting a chemical flushing fluid consisting of cellulose and potassium humate to continuously punch for half a day, flushing residues in the holes and reducing the fluidity of a rich water layer; and then, a high-pressure slurry pump is adopted to pour cement paste with a certain proportion into the drill hole under high pressure, after the cement is solidified for 72 hours, a roller bit with the diameter of 200mm is adopted to carry out through hole, after the through hole is finished, the flushing fluid consisting of cellulose, potassium humate and the like is used again to flush residues in the hole, and thus the aquifer 1 is basically sealed (if the through hole is not sealed, the steps can be repeated). In order to effectively seal the gap between the filling casing 2 and the inner wall of the through hole, the invention adopts the mode that the non-return device is arranged on the filling casing 2 at the bottommost layer (the non-return device has the function of preventing the backflow of cement slurry), after the filling casing 2 is completely arranged, the cement slurry is configured according to the volume of the gap and is filled into the filling casing 2, then clear water is filled into the filling casing 2 by a high-pressure slurry pump, the pump is stopped until the annular gap between the outer wall of the casing and the drilled hole returns out the cement slurry, and the pump is withdrawn after the annular gap is solidified for 48 hours, so that the annular gap between the outer wall of the casing and the drilled hole is completely sealed by the high-strength cement, the operation further strengthens the plugging of the aquifer 1, and is beneficial; and finally, sweeping the hole to the bottom from the filling casing 2 by using a small drill rod with the diameter of 60mm in cooperation with thick slurry, and sweeping residual cement residues in the casing to ensure that the casing is clean.

Specifically, the construction investment time of the filling system directly influences the follow-up stope taking over of the underground mine, so that the yield time of the mine is influenced. A total of 6 surface-410 m filling drill holes are designed in a certain mine, the diameter of each filling drill hole is 250mm, and the lower diameter of each filling cover pipe is 168 mm. In the process of filling and drilling the hole to the level of-410 m, the water-bearing stratum 1(-65m-350m) is encountered, wherein the horizontal water quantity of-290 m is extremely large, the water pressure is sprayed out to be about 20m high when the hole is normally drilled, if effective water control measures are not adopted, after the filling and drilling hole is communicated with the-410 m filling chamber, water in the water-bearing stratum 1 can be greatly discharged to a-410 m roadway along an annular gap, and great potential hazards are generated on the installation and safe operation of a filling pipeline and the safe operation of the middle section of-410 m. In order to thoroughly solve the problem of annular intermittent water drainage, ensure the water stop of a filling pipeline and work safely for a long time, the following scheme for treating water in holes is provided:

1. and (5) lifting the filling drill hole after the filling drill hole is constructed to the level of-410 m (the filling drill hole is not communicated with the-410 m filling chamber at the stage). Firstly, cleaning flushing fluid in a mud pit, preparing vegetable gum and a plugging agent, and circularly punching for half a day to block large cracks in a drill hole as much as possible; then adding a chemical flushing fluid consisting of cellulose and potassium humate, continuously punching for half a day, on one hand flushing residues in the holes clean, on the other hand reducing the fluidity of a rich water layer as much as possible, according to the volume of a filling borehole, cement paste (28 tons of 425 cement and 14 square water) with the ash-water ratio of 2:1 is prepared, the cement paste is poured into the filling borehole under high pressure through a 1200-mud pump, after the cement paste is solidified for 72 hours (the cement at the stage has certain strength and has certain plugging effect on an aquifer 1, and the strength of the cement at the stage has small influence on the through hole efficiency), a 200-cone bit is used for punching the hole to the level of-410 m, chemical slurry consisting of cellulose, potassium humate and the like is used for punching the hole for 5 hours, the hole is rinsed clean of all residues in the hole so that the aquifer (1) is substantially sealed (if the hole is not sealed, the above steps are repeated).

2. Before installing the filling casing 2, firstly installing a check valve at the bottom of the lowest filling casing 2, and sequentially putting all the filling casings 2 in place; calculating the volume of a space between the outer diameter of the casing pipe of 168mm and the inner diameter of the casing pipe of 200mm after the through hole to be 4.1 square, preparing 4.1 square cement slurry according to the grey-water ratio of 2:1 (5.2 tons of cement and 2.6 square water), forcibly filling the cement slurry into the drill hole by a 1200-square slurry pump, then continuously filling clear water until the annular clearance between the outer wall of the casing pipe and the drill hole returns the cement slurry, stopping the pump (indicating that the annular clearance is filled with the cement slurry), and withdrawing the pump after the annular clearance is solidified for 48 hours, so that the annular clearance between the outer wall of the casing pipe and the drill hole is completely sealed, and a water layer is.

3. Waiting for about half a day, sweeping the hole to the bottom from the filling casing 2 by using a 60-bit drill rod in cooperation with thick slurry, and sweeping residual cement residues in the casing to ensure that the casing is clean.

1, the investment cost of a single hole (450m) is about 14.6 ten thousand yuan, and the total investment (6 holes) is about 88 ten thousand yuan; 2. according to hydrological data, if the filling hole does not control water, the natural drainage of 6 holes is estimated to be 1500m3/d, the increased drainage and auxiliary cost of a water pump room of 800m per year is estimated to be 213 ten thousand yuan, and the maintenance cost of the filling pipeline is 50 ten thousand yuan per year. 3. Through field feedback, water is stopped at the outlet of the existing filling drill hole (the middle section of the position of 410 m), and potential safety hazards caused by water trouble in the hole to the installation of a filling pipeline and the debugging and running of a filling system are avoided. The successful implementation of the scheme can obtain good economic benefit and social benefit.

It should be noted that the detailed description of the invention is not included in the prior art, or can be directly obtained from the market, and the detailed connection mode can be widely applied in the field or daily life without creative efforts, and the detailed description is not repeated here.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A water outlet and control method for filling and drilling construction is characterized by comprising the following steps:

2. The water outlet and control method for filling drilling construction according to claim 1, wherein: and (5) repeating the steps 2-4 for a plurality of times before the step 5, and forming a plurality of circles of cement layers on the outer layer of the filling casing.

3. The water outlet and control method for filling drilling construction according to claim 1, wherein: the check device comprises a base and a check valve; the base is provided with a plurality of through holes, and the through holes are communicated to the circumferential outer side edge through communicated channels; and a check valve is arranged on the channel.

4. The water outlet and control method for filling drilling construction according to claim 3, wherein: the lower end of the filling sleeve is circumferentially provided with an opening; the channel is communicated with the opening at the lower end of the filling casing pipe and is used for enabling cement paste in the filling casing pipe to enter a gap of the cement layer through the perforation, the channel and the opening in sequence.

5. The water outlet and control method for filling drilling construction according to claim 1, wherein: the size of the filling sleeve is smaller than that of the filling drill hole.

6. The water outlet and control method for filling drilling construction according to claim 1, wherein: the chemical flushing liquid comprises cellulose and potassium humate.

7. The water outlet and control method for filling drilling construction according to claim 1, wherein: the vegetable gum is a delayed swelling gel particle.