CN113585353B - Technology for treating water inrush of uranium overproof drilling - Google Patents
Technology for treating water inrush of uranium overproof drilling Download PDFInfo
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- CN113585353B CN113585353B CN202110784903.3A CN202110784903A CN113585353B CN 113585353 B CN113585353 B CN 113585353B CN 202110784903 A CN202110784903 A CN 202110784903A CN 113585353 B CN113585353 B CN 113585353B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
Abstract
The invention discloses a technique for treating water inrush from uranium overproof drilling, which comprises the following steps: a through hole of the original hole; drilling and surrounding rock brushing; a lower grouting plug; grouting; and (4) detecting the quality. After the hole is drilled to reach the designed position, a drilling tool wound with a steel wire rope moves up and down, the hole wall is scrubbed by the steel wire rope, and the drilled hole is washed by high-pressure water, so that the surrounding rock cracks of the drilled hole are exposed thoroughly; after the drilled holes are cleaned up, installing a grout stop plug by using a drill rod of a drilling machine, and pressing grouting liquid into the holes by using a slurry pump to finish grouting; the technology is adopted to treat the water inrush from the uranium overproof drill hole, the reduction amplitude of the uranium concentration at an observation point is more than 78%, the natural uranium concentration is lower than the emission standard of 300 mu g/l in uranium mining metallurgical radiation protection and environmental protection regulations (GB 2327-2020), the treatment technology is simple, the problem of water inrush from the uranium overproof drill hole is solved, the one-time standard-reaching treatment target is realized, the investment cost of the technology is only 8% of the direct cost of the adsorption technology, and the investment cost is greatly reduced.
Description
Technical Field
The invention relates to water environment treatment in a radiation environment with an overproof uranium concentration, in particular to a water inrush treatment process for a drilling hole with an overproof uranium concentration, and belongs to the technical field of water environment treatment of uranium concentration in a radiation environment.
Background
An exploration project of uranium ore or radioactive element associated ore deposit, because the underground water natural circulation system and the geochemical environment are disturbed after drilling construction, a drilling hole is communicated with an ore body, a water-bearing layer is in hydraulic connection with the earth surface, the drilling hole forms a channel for the underground water with the excessive natural uranium concentration in the ore body and the water-bearing layer to flow to the earth surface, the underground water with the excessive natural uranium concentration in the ore body and the water-bearing layer originally causes that the natural uranium concentration in the water-gushing water flowing to the earth surface through the drilling hole exceeds the emission limit value of uranium ore metallurgy radiation protection and environmental protection regulation (GB 2327-2020), the water system discharged into an exploration area pollutes the water environment, according to the requirements of green geological exploration and mine construction specifications, the environmental problem must be solved, the problem that the uranium overproof drilling water gushing water is always a difficult problem of radiation environment improvement, and the existing uranium overproof drilling water control technology has the following defects:
for water inrush of overproof drilling holes of uranium in hard rock uranium mines, the adsorption process and the precipitation process are mainly adopted for treatment at home, equipment needs to run for a long time due to the adoption of the adsorption process and the precipitation process, the production stage of the uranium mine is economically feasible, but for uranium ore exploration projects, manpower and material resources need to be invested for a long time, and the consumption is large; before the engineering construction is administered in the retirement of part uranium deposit exploration project, the uranium that will bore hole disturbance area exceeds standard water drainage is collected the back and is adopted adsorption process to administer, though can discharge to reach standard, but because the uranium drilling that exceeds standard gushes water runoff process has the dispersibility, accomplish very hardly and collect completely, the uranium drilling that can not collect exceeds standard gushes water still can cause the pollution to becoming investigation district water environment, consequently, adopt the drainage to collect and adsorb the technique and administer the uranium drilling that exceeds standard and gush water, except economy, can't accomplish fundamental improvement.
Disclosure of Invention
The invention aims to provide a technique for treating water inrush of uranium overproof drilling to solve the problems.
The invention achieves the purpose through the following technical scheme, and the uranium standard exceeding drilling water inrush treatment process comprises the following steps:
(1) And (3) determining and measuring coordinates according to the original hole, re-measuring the position of the original hole, manually excavating a shallow well to search the original hole, after finding the original hole, finishing the installation of the drilling machine according to the logging parameters of the original hole, starting the hole penetrating operation, wherein the hole penetrating equipment can be a GJ-150 drilling machine or an XY-300 type geological drilling machine, a BM-150 mud pump, a phi 42 geological drilling rod, a phi 45 diamond coring bit and the hole penetrating material is clear water.
(2) After the drilled hole penetrates through the designed position, a drilling tool wound with a steel wire rope moves up and down, the hole wall is scrubbed by the steel wire rope, and the drilled hole is washed by high-pressure water, so that the surrounding rock cracks of the drilled hole are exposed thoroughly.
(3) And after the drilling and flushing process is finished, the drilling machine is lifted out, a drill rod of the drilling machine is used for installing the grout stopping plug, and when the grout stopping plug is sent to a designed position, the drill rod is rotated and loosened after kelp on the grout stopping plug expands.
(4) Preparing grouting liquid, pressing the grouting liquid into the hole by a slurry pump to complete grouting, lifting out the drill rod after grouting is finished, troweling the mortar for manual work of the hole opening, and marking.
(5) And after the construction is finished, strict detection is carried out on the quality, and the examination and approval are finished.
Preferably, when the position of the original hole cannot be obtained according to the original hole position coordinate determined in the step (1), water is filled in the shallow well, the position where water seepage is fast is the hole, and the original hole is searched by a water filling method.
Preferably, the method of inserting bamboo or steel bar after finding the original hole in step (1) measures the inclination angle and azimuth of the original hole and the drill axis trace near the hole.
Preferably, in the step (2), clear water is adopted to wash from the bottom of the hole to the top of the hole through a high-pressure water pump, when the water at the top is clear during washing, the washing lasts for 10 minutes, and the single-hole washing time is 30-50 minutes.
Preferably, the drilling through hole and the grout stop plug in the step (2) must reach the designed position, and the drilling flushing in the through hole operation must achieve the effect of thoroughly exposing the surrounding rock of the drilling hole.
Preferably, the slurry stopping plug in the step (3) comprises HRB40 phi 25 steel bars, NM400 steel plates and kelp, the kelp is edible kelp, and the swelling time of the edible kelp needs to be calculated in advance through experiments.
Preferably, the solid-water ratio of the grouting material prepared from the grouting liquid in the step (4) to water is 1.
Preferably, the grouting material is required to be sent to a professional detection unit for use after being checked to be qualified before preparation and construction.
Preferably, in the step (4), the drill rod is slowly lifted during grouting, grouting is performed from bottom to top by adopting a depressurization method, and grouting liquid continuously flows out of the grouting liquid for 5 minutes when the drill rod is grouted to the hole opening.
Preferably, the error of the specific gravity of the material for preparing the grouting liquid in the step (4) is less than 5%, and the grouting liquid is uniformly stirred by using a stirring tool after preparation, wherein the temperature of the grouting liquid is 5-40 ℃.
The beneficial effects of the invention are:
(1) According to the method, after the drill hole penetrates to the designed position, a drilling tool wound with a steel wire rope moves up and down, the steel wire rope is used for scrubbing the hole wall, the drill hole is flushed with high-pressure water, the surrounding rock crack of the drill hole is exposed thoroughly, after the drill hole is cleaned up, a grout stop plug is installed on a drill rod of the drilling machine, grout is pressed into the hole by a mud pump to complete grouting, the drill rod is lifted out after the grouting is finished, the process is adopted for treating the gushing water of the uranium exceeding drill hole, the reduction amplitude of the uranium concentration at an observation point is larger than 78%, the natural uranium concentration is lower than the emission standard of uranium mine radiation protection and environmental protection regulation (GB 2327-2020) 300 mu g/l, the treatment process is simple, and the problem of the gushing water of the uranium exceeding drill hole is solved;
(2) The method adopts the process to treat the uranium overproof drilling gushing water, realizes the one-time standard-reaching treatment target, has the input cost which is only 8 percent of the direct cost of the adsorption process, and greatly reduces the input cost compared with the existing adsorption process and precipitation process.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a flow chart of the master hole through hole of FIG. 1 according to the present invention;
FIG. 3 is a flow chart of the present invention for drilling and surrounding rock scrubbing of FIG. 1;
FIG. 4 is a flow chart of the lower grout plug of FIG. 1 according to the present invention;
FIG. 5 is a flow chart of the grouting of FIG. 1 according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 first embodiment is as follows:
referring to fig. 1, the process for treating the uranium exceeding drilled water inrush includes the following steps:
(1) And (4) determining the coordinates according to the original hole, re-determining the position of the original hole, manually excavating the shallow well to search the original hole, after finding the original hole, finishing the installation of the drilling machine according to the logging parameters of the original hole, and starting the through hole operation.
(2) After the drilled hole penetrates through the designed position, a drilling tool wound with a steel wire rope moves up and down, the hole wall is scrubbed by using the steel wire rope, and the drilled hole is washed by using high-pressure water, so that the surrounding rock cracks of the drilled hole are thoroughly exposed.
(3) And after the drilling and flushing process is finished, the drilling machine is lifted out, a drill rod of the drilling machine is used for installing the grout stopping plug, and when the grout stopping plug is sent to a designed position, the drill rod is rotated and loosened after kelp on the grout stopping plug expands.
(4) Preparing grouting liquid, pressing the grouting liquid into the hole by adopting a slurry pump to complete grouting, taking out a drill rod after grouting is finished, troweling the mortar manually used for the hole opening, and marking; during grouting, the bottom pressure is 2-3 times of the hydrostatic pressure in the hole, the orifice pressure is 1-1.5 times of the hydrostatic pressure in the hole, the purpose is to press the grout into the cracks of the surrounding rock of the drilled hole through grouting under pressure and discharge water in the hole to the outside of the hole, the grouting amount and the lifting meter number of the drill rod are calculated when the drill rod is lifted, the condition that the grout on the drill rod is more than 1m deep into the hole after the drill rod is lifted is ensured, and the discontinuity of the grout in the hole is avoided; when grouting is interrupted due to an accident, the method is processed according to the following principle: the interruption time is shortened as much as possible, and the grouting operation is recovered as early as possible, if the interruption time exceeds 30min, the grouting is recovered after the treatment to the original hole depth, and when the grouting is recovered, the grouting is started by using the slurry with the maximum water-cement ratio, if the slurry suction amount is close to that before the interruption, the water-cement ratio before the interruption can be adopted; if the pulp suction amount is reduced compared with that before interruption, the pulp is gradually thickened; if the slurry suction amount is reduced greatly compared with that before interruption and the slurry suction is stopped in a very short time, the grouting section is considered to be unqualified, and through holes, flushing drill holes and grouting must be conducted again after solidification; after grouting is finished, the drill rod is lifted out, the drill rod and the pump are cleaned, manual mortar for the hole is smoothed, marking is done, maintenance work of the cement paste for the hole is done, and heat preservation work of the cement paste for the hole is also done in winter.
(5) After the construction is finished, strict detection is carried out on the quality, the inspection and the approval are finished, grouting operation must be carried out according to a design scheme, and the next procedure can be carried out after the previous procedure is qualified through 'three inspections' and then the inspection and the acceptance are qualified through a supervision engineer.
Specifically, when the original hole position cannot be obtained according to the original hole position determination coordinates in the step (1), water is poured into the shallow well, and the position where water seepage is fast is the hole.
Specifically, the method of inserting the bamboo pole or the steel bar after finding the original hole in the step (1) measures the inclination angle and the azimuth angle of the original hole and the drilling axis trace near the hole.
Specifically, clear water is adopted to flush from the bottom of the hole to the top of the hole through a high-pressure water pump in the step (2), when the water at the top is clear during flushing, the flushing lasts for 10 minutes, and the single-hole flushing time is 30-50 min; flushing is carried out by sending clean water into the hole through a guide pipe and a drill rod by using a high-pressure water pump, carrying silt and rock debris in the hole out of the hole by a flushing method from the bottom of the hole to the outside of the hole, flushing until water returning from an orifice is clarified during flushing for 10 minutes, flushing time of a single hole is not less than 30 minutes, flushing pressure is generally 80% of grouting pressure, and if the grouting pressure is more than 1.0Mpa, filling materials such as mud skin on the hole wall, rock debris and silt in the hole are flushed out of the drill hole by taking 1.0 Mpa.
Specifically, the through holes and the grout stop plugs drilled in the step (2) must reach the designed positions, and the drilling holes in the through hole operation must be flushed to achieve the effect of thoroughly exposing surrounding rocks of the drilled holes.
Specifically, the slurry stopping plug in the step (3) comprises HRB40 phi 25 steel bars, NM400 steel plates and kelp, the kelp is edible kelp, and the expansion time of the edible kelp needs to be calculated in advance through experiments.
Specifically, the solid-water ratio of the grouting material prepared from the grouting liquid in the step (4) to water is 1-1; as Ca (OH) 2 is firstly released during the hydration of cement clinker minerals and then forms a pozzolanic effect with active components in the fly ash to generate calcium chlorate hydrate and calcium silicate hydrate, the solid-water ratio of the grouting liquid during preparation is 1-1.3, if the solid-water ratio of the grouting liquid is less than 1.
Specifically, the grouting material is required to be sent to a professional detection unit before preparation and construction, and can be used after the grouting material is qualified.
Specifically, in the step (4), the drill rod is slowly lifted during grouting, grouting is performed from bottom to top by adopting a depressurization method, and grouting liquid continuously flows out of the grouting liquid for 5 minutes when the drill rod is grouted to the orifice.
Specifically, the error of the specific gravity of the material for preparing the grouting liquid in the step (4) is less than 5%, and the grouting liquid is uniformly stirred by using a stirring tool after preparation, wherein the temperature of the grouting liquid is 5 ℃.
The above is an example where the slurry temperature is 10 ℃.
Example two:
referring to fig. 1, the process for treating the uranium exceeding drilled water inrush includes the following steps:
(1) And (4) determining the coordinates according to the original hole, re-determining the position of the original hole, manually excavating the shallow well to search the original hole, after finding the original hole, finishing the installation of the drilling machine according to the logging parameters of the original hole, and starting the through hole operation.
(2) After the drilled hole penetrates through the designed position, a drilling tool wound with a steel wire rope moves up and down, the hole wall is scrubbed by the steel wire rope, and the drilled hole is washed by high-pressure water, so that the surrounding rock cracks of the drilled hole are exposed thoroughly.
(3) And after the drilling and flushing process is finished, the drilling machine is lifted out, a drill rod of the drilling machine is used for installing the grout stopping plug, and when the grout stopping plug is sent to a designed position, the drill rod is rotated and loosened after kelp on the grout stopping plug expands.
(4) Preparing grouting liquid, pressing the grouting liquid into the hole by adopting a slurry pump to complete grouting, taking out a drill rod after grouting is finished, troweling the mortar manually used for the hole opening, and marking; during grouting, the bottom pressure is 2-3 times of the hydrostatic pressure in the hole, the orifice pressure is 1-1.5 times of the hydrostatic pressure in the hole, the purpose is to press the grout into the cracks of the surrounding rock of the drilled hole through grouting under pressure and discharge water in the hole to the outside of the hole, the grouting amount and the lifting meter number of the drill rod are calculated when the drill rod is lifted, the condition that the grout on the drill rod is more than 1m deep into the hole after the drill rod is lifted is ensured, and the discontinuity of the grout in the hole is avoided; when grouting is interrupted due to an accident, the method is carried out according to the following principle: the interruption time is shortened as much as possible, and the grouting operation is recovered as soon as possible, if the interruption time exceeds 30min, the grouting operation needs to be recovered after the treatment is carried out to the original hole depth, and when the grouting operation is recovered, the grouting operation is started by using the slurry with the maximum water-cement ratio, if the slurry suction amount is close to that before the interruption, the water-cement ratio before the interruption can be adopted; if the pulp suction amount is reduced compared with that before interruption, the pulp is gradually thickened; if the slurry suction amount is reduced greatly compared with that before interruption and the slurry suction is stopped in a very short time, the grouting section is considered to be unqualified, and through holes, flushing drill holes and grouting must be conducted again after solidification; after grouting is finished, the drill rod is lifted out, the drill rod and the pump are cleaned, manual mortar for the hole is smoothed, marking is done, maintenance work of the cement paste for the hole is done, and heat preservation work of the cement paste for the hole is also done in winter.
(5) After the construction is finished, the quality is strictly detected, the inspection and approval are finished, the grouting operation is carried out according to a design scheme, and the next procedure can be carried out after the previous procedure is qualified through 'three inspections', and then the inspection and acceptance by a supervision engineer are qualified.
Specifically, when the original hole position cannot be obtained according to the original hole position determination coordinates in the step (1), water is poured into the shallow well, and the position where water seepage is fast is the hole.
Specifically, the method of inserting the bamboo pole or the steel bar after finding the original hole in the step (1) measures the inclination angle and the azimuth angle of the original hole and the drilling axis trace near the hole.
Specifically, clear water is adopted to flush from the bottom of the hole to the top of the hole through a high-pressure water pump in the step (2), when the water at the top is clear during flushing, the flushing lasts for 10 minutes, and the single-hole flushing time is 30-50 min; flushing is carried out by sending clean water into the hole through a guide pipe and a drill rod by using a high-pressure water pump, carrying silt and rock debris in the hole out of the hole by a flushing method from the bottom of the hole to the outside of the hole, flushing until water returning from an orifice is clarified during flushing for 10 minutes, flushing time of a single hole is not less than 30 minutes, flushing pressure is generally 80% of grouting pressure, and if the grouting pressure is more than 1.0Mpa, filling materials such as mud skin on the hole wall, rock debris and silt in the hole are flushed out of the drill hole by taking 1.0 Mpa.
Specifically, the through hole and the grout stop plug drilled in the step (2) must reach the designed position, and the drilling hole flushing in the through hole operation must achieve the effect of thoroughly exposing the surrounding rock of the drilled hole.
Specifically, the slurry stopping plug in the step (3) comprises HRB40 phi 25 steel bars, NM400 steel plates and kelp, the kelp is edible kelp, and the expansion time of the edible kelp needs to be calculated in advance through experiments.
Specifically, the solid-water ratio of the grouting material prepared from the grouting liquid in the step (4) to water is 1-1; as Ca (OH) 2 is firstly released during the hydration of cement clinker minerals and then forms a pozzolanic effect with active components in the fly ash to generate calcium chlorate hydrate and calcium silicate hydrate, the solid-water ratio of the grouting liquid during preparation is 1-1.3, if the solid-water ratio of the grouting liquid is less than 1.
Specifically, the grouting material is required to be sent to a professional detection unit for use after being inspected to be qualified before preparation and construction.
Specifically, in the step (4), the drill rod is slowly lifted during grouting, grouting is performed from bottom to top by adopting a depressurization method, and grouting liquid continuously flows out of the grouting liquid for 5 minutes when the drill rod is grouted to the orifice.
Specifically, the error of the specific gravity of the material for preparing the grouting liquid in the step (4) is less than 5%, and the grouting liquid is uniformly stirred by using a stirring tool after preparation, wherein the temperature of the grouting liquid is 30 ℃.
The above is an example where the slurry temperature is 30 ℃.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity only, and those skilled in the art will recognize that the embodiments described herein may be combined as a whole to form other embodiments as would be understood by those skilled in the art.
Claims (9)
1. The technology for treating water inrush of uranium standard-exceeding drill holes is characterized in that: the technology for treating the water inrush of the uranium overproof drill hole comprises the following steps:
(1) According to the original hole position coordinate, re-measuring the original hole position, manually excavating a shallow well to search the original hole, after finding the original hole, finishing the installation of the drilling machine according to the original hole logging parameters, and starting the through hole operation;
(2) After the drilled hole penetrates through the designed position, a drilling tool wound with a steel wire rope moves up and down to enable the drilling tool to brush the hole wall, the hole opening is washed by high-pressure water to enable the cracks of the surrounding rock of the drilled hole to be completely exposed, clear water is used for washing the top of the hole from the hole bottom through a high-pressure water pump, when the top water is clear during washing, the washing is continued for 10 minutes, and the single-hole washing time is 30-50 minutes;
(3) After the drilling and flushing process is finished, the drilling machine is lifted out, a grout stop plug is installed at the bottom of a drill rod of the drilling machine in a threaded mode, and when the grout stop plug is sent to a designed position, the drill rod is loosened by rotating after kelp on the grout stop plug expands;
(4) Preparing grouting liquid, pressing the grouting liquid into the hole by a slurry pump to complete grouting, lifting out a drill rod after grouting is finished, troweling the mortar for manual work of the hole opening, and marking;
(5) And after the construction is finished, strict detection is carried out on the quality, and the examination and approval are finished.
2. The uranium overproof drilling water inrush treatment process according to claim 1, wherein: and (2) when the position of the original hole cannot be obtained according to the original hole position in the step (1), filling water into the shallow well, wherein the position with fast water seepage is the hole.
3. The process of treating water inrush of uranium overproof drilling according to claim 1, wherein: and (3) measuring the inclination angle and the azimuth angle of the original hole opening and the drilling axis trace near the hole opening by the method of inserting the bamboo pole or the steel bar after the original hole opening is found in the step (1).
4. The process of treating water inrush of uranium overproof drilling according to claim 1, wherein: and (3) drilling through holes and the grout stop plugs in the step (2) must reach designed positions, and drilling flushing in through hole operation must achieve the effect of thoroughly exposing surrounding rocks of the drilled holes.
5. The uranium overproof drilling water inrush treatment process according to claim 1, wherein: the grout stopping plug in the step (3) comprises HRB40 phi 25 steel bars, NM400 steel plates and kelp, the kelp is edible kelp, and the expansion time of the edible kelp needs to be calculated in advance through experiments.
6. The process of treating water inrush of uranium overproof drilling according to claim 1, wherein: the solid-water ratio of the grouting material prepared from the grouting liquid in the step (4) to water is 1-1.
7. The process of treating water inrush of uranium overproof drilling according to claim 6, wherein: the grouting material is required to be sent to a professional detection unit for use after being checked to be qualified before preparation and construction.
8. The uranium overproof drilling water inrush treatment process according to claim 1, wherein: in the step (4), the drill rod is slowly lifted during grouting, grouting is carried out from bottom to top by adopting a depressurization method, and grouting liquid continuously flows out of the grouting liquid for 5 minutes when the drill rod is grouted to the orifice.
9. The process of treating water inrush of uranium overproof drilling according to claim 1, wherein: the material proportion error of the grouting liquid prepared in the step (4) is less than 5%, and the grouting liquid is uniformly stirred by using a stirring tool after preparation, wherein the temperature of the grouting liquid is 5-40 ℃.
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| CN102561992B (en) * | 2012-01-29 | 2013-11-06 | 山东大学 | Grouting plugging process adopting deformation water stopper |
| CN103696730B (en) * | 2013-12-30 | 2016-05-18 | 新疆中核天山铀业有限公司 | Drilling construction spillage blocking method |
| CN106930737A (en) * | 2015-12-31 | 2017-07-07 | 新疆中核天山铀业有限公司 | The hydraulic jet perforation technique that ground-dipping uranium extraction drilling filter is built |
| CN106194111B (en) * | 2016-08-30 | 2019-02-15 | 中国石油集团渤海钻探工程有限公司 | Down-hole casing steel wire wall scraper |
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