CN102505944B - Water sealing method for replacing mud in freezing holes with slow setting cement grout - Google Patents
Water sealing method for replacing mud in freezing holes with slow setting cement grout Download PDFInfo
- Publication number
- CN102505944B CN102505944B CN201110338871.0A CN201110338871A CN102505944B CN 102505944 B CN102505944 B CN 102505944B CN 201110338871 A CN201110338871 A CN 201110338871A CN 102505944 B CN102505944 B CN 102505944B
- Authority
- CN
- China
- Prior art keywords
- mud
- cement
- water
- grout
- sodium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention provides a water sealing method for replacing mud in freezing holes with slow setting cement grout. Before the cement grout is stirred, the freezing holes are firstly punched; slow setting cement grout preparation materials comprising cement, water, sodium-based bentonite, a retarder and sodium carboxymethylcellulose are got ready according to the grout use level per pool; water is added into the retarder and the sodium carboxymethylcellulose to dissolve the retarder and the sodium carboxymethylcellulose, and the needed water quantity is deducted from the total water consumption of the grout; after the retarder and the sodium carboxymethylcellulose are dissolved or nearly dissolved, water is added to a stirring pool; a machine is started to stir the water, and the cement and the sodium-based bentonite are poured into the water in sequence; the cement grout is enabled to flow into a grout storing pool to be temporarily stored; a grout injecting pump is started and the grout in the grout storing pool is once pumped into the freezing holes; after the grout is injected, a mud sucking pipe of a mud pump is immediately transferred to a mud pool; a fixed quantity of mud is compressed into a pipeline and the quantity of the mud has to be accurately measured; and after follow-up mud compression and injection are completed, a drill rod is rapidly lifted up and a drilling template is cleaned, so as to switch to a freezing pipe sinking operation. The water sealing method has the advantages that mud of the freezing holes is replaced at high quality.
Description
Technical field
The present invention relates to freezing hole mud water shutoff technical field, specifically a kind of slow-setting cement grout and displacement freezing hole mud Water sealing method thereof.
Background technology
In pit shaft construction project, along with the increase that press on increase and the ground of the degree of depth, the difficulty that pre grouting from the surface and pre grouting from the working face are harnessed the river is conventionally increasing, and effect is also more and more difficult to ensure card; Especially the rock stratum to the parallel cranny development of high angle, or be rich in the sand layers of pore water, slip casting effect is difficult to ensure especially.
Erdos area adopts some pit shafts of complete dark freeze-wellboring technology construction, and after frost wall thaws, the annular space outside freezing hole and freezing pipe easily becomes vertical conduit pipe, and mine safety in serious threat.In recent years, in the part shaft construction of this area, similar accident once occurred, and serious economic loss also once because freezing hole water guide floods well accident, has been caused between mine construction stage in colliery, the Yang village, China Yanzhou Mining District.Visible, in complete dark freeze-wellboring construction, the vertical conduit pipe of freezing hole is carried out to water shutoff processing, be important measures that ensure mine construction safety.
The vertical conduit pipe water shutoff of so-called freezing hole processing, complete at freezing hole construction exactly, freezing pipe is first replaced the mud in the boring within the scope of above certain altitude at the bottom of hole, then is transferred freezing pipe before transferring with extended slurry.By solidifying of slow-setting cement grout, realize the cementing of freezing pipe and stratum, block conduit pipe, reach the effect of solid pipe water shutoff.Extended slurry has certain slow setting time, and calculus rate is higher, and calculus body has higher intensity with impervious.
The secondary Shaft Freezing engineering in Men Keqing colliery, because formation properties is comparatively complicated, in freezing borehole mud, need the more chemical admixture of admixture, thereby in cement paste replacement process, affect the performance indications such as the time of setting of cement grout, thereby preparation can be compatible with drilling slurry, there is good mobility, stability, the reasonable slow-setting cement grout of time of setting, be the important and key issue of the solid pipe water shutoff technical research of freezing hole.
After ensureing that freezing shaft thaws, mine is not subject to the threat of upper formation water, avoids field with "nine squares" superficial part water resource to run off simultaneously, in the time of freezing hole construction, need carry out water shutoff processing to freezing hole.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of slow-setting cement grout and displacement freezing hole mud Water sealing method thereof, improve the stability of cement grout, extend the cement granules sedimentation time, improve slurries calculus rate, completed in high quality freezing hole cement paste displacement work.
The present invention realizes with following technical scheme: a kind of Water sealing method for replacing mud in freezing holes with slow setting cement grout, and the basic cement grout proportioning of employing is: water/binder ratio 1～1.25: 1; Suspending agent and retarding agent that in basic cement grout, admixture weight is 1.5～2%; Described retarding agent is the mixture of one or both and two or more any mixing ratios in sodium phosphate trimer, tartaric acid, sodium potassium tartrate tetrahydrate, citric acid or six kinds of retarding agent of zinc chloride; The wherein volume 0.1%～0.5% of sodium pyrophosphate; Sodium phosphate trimer volume 0.1%～0.6%, tartaric volume 0.2%～0.4%, the volume 0.4%～0.5% of sodium potassium tartrate tetrahydrate, the volume 0.05%～0.35% of citric acid; The volume 0.2%～0.3% of zinc chloride; In above-mentioned mixed liquor, be also mixed with 0.8～1% sodium carboxymethylcellulose; Above-mentioned suspending agent is sodium bentonite; Concrete grammar step is as follows:
(1) before cement paste stirs, first freezing hole is carried out to punching;
(2) be ready to slow-setting cement grout its preparing materials by every pond slurries consumption: cement, water, sodium bentonite, retarding agent and sodium carboxymethylcellulose;
(3) retarding agent and sodium carboxymethylcellulose are added water and dissolved, institute's water requirement is deducted from slurries total water amount;
(4) retarding agent and sodium carboxymethylcellulose dissolve and finish or close on while end, add water in stirring pool, and start is stirred, and pours successively cement, sodium bentonite into;
(5) cement paste stir about 3min, after substantially stirring, mixes retarding agent liquid, continues to stir 3min; Then carboxymethylcellulose sodium solution is added, then stir 3min, cement grout has stirred;
(6) open the pipeline valve between stirring pool and pulp storage tank, make cement grout flow into pulp storage tank temporary;
(7) open grouting pump, disposable the slurries in the pulp storage tank freezing hole that pumps into;
(8) slurries injection is complete, immediately slush pump pulp-absorbing pipe is gone to mud pit, in pipeline, is pressed into quantitative slurry, the necessary accurate-metering of mud amount; The computational methods of mud are as follows:
1), first according to cement paste cumulative volume and bore diameter, calculate without under drilling rod condition the overall height of cement paste post in freezing hole;
2) ignore drilling rod internal and external pressure balance, suppose that the uncovered drilling rod in bottom inserts in cement paste, and the drilling rod bar wall body of insertion portion amasss in whole " suck-back enters " drilling rods of shared mud, with this understanding, according to the internal-and external diameter of cement paste post height, drilling rod in hole, calculate it bar wall body that " is inserted into the part in cement paste " of drilling rod long-pending; And then, converse the interior cement column of drilling rod with respect to the discrepancy in elevation outside drilling rod;
3) in drilling rod under the known prerequisite of cement column overall height, calculate the inside clear space of top rod, then calculate the inside clear space of well head to ground pipeline between mud pit, sum of the two is needs the follow-up mud amount being pressed into;
(9) follow-up mud pressure injection is complete, carries drilling rod on rapidly, and cleaning temporary guide base, proceeds to freezing pipe sinking operation.
Advantage of the present invention is: complete in high quality freezing hole cement paste displacement work.
Detailed description of the invention
Water sealing method for replacing mud in freezing holes with slow setting cement grout, the basic cement grout proportioning of employing is: water/binder ratio 1～1.25: 1; Suspending agent and retarding agent that in basic cement grout, admixture weight is 1.5～2%; Described retarding agent is the mixture of one or both and two or more any mixing ratios in sodium phosphate trimer, tartaric acid, sodium potassium tartrate tetrahydrate, citric acid or six kinds of retarding agent of zinc chloride; The wherein volume 0.1%～0.5% of sodium pyrophosphate; Sodium phosphate trimer volume 0.1%～0.6%, tartaric volume 0.2%～0.4%, the volume 0.4%～0.5% of sodium potassium tartrate tetrahydrate, the volume 0.05%～0.35% of citric acid; The volume 0.2%～0.3% of zinc chloride; In above-mentioned mixed liquor, be also mixed with 0.8～1% sodium carboxymethylcellulose; Above-mentioned suspending agent is sodium bentonite; Concrete grammar step is as follows:
(1) before cement paste stirs, first freezing hole is carried out to punching;
(2) be ready to slow-setting cement grout its preparing materials by every pond slurries consumption: cement, water, sodium bentonite, retarding agent and sodium carboxymethylcellulose;
(3) retarding agent and sodium carboxymethylcellulose are added water and dissolved, institute's water requirement is deducted from slurries total water amount;
(4) retarding agent and sodium carboxymethylcellulose dissolve and finish or close on while end, add water in stirring pool, and start is stirred, and pours successively cement, sodium bentonite into;
(5) cement paste stir about 3min, after substantially stirring, mixes retarding agent liquid, continues to stir 3min; Then carboxymethylcellulose sodium solution is added, then stir 3min, cement grout has stirred;
(6) open the pipeline valve between stirring pool and pulp storage tank, make cement grout flow into pulp storage tank temporary;
(7) open grouting pump, disposable the slurries in the pulp storage tank freezing hole that pumps into;
(8) slurries injection is complete, immediately slush pump pulp-absorbing pipe is gone to mud pit, in pipeline, is pressed into quantitative slurry, the necessary accurate-metering of mud amount; The computational methods of mud are as follows:
1), first according to cement paste cumulative volume and bore diameter, calculate without under drilling rod condition the overall height of cement paste post in freezing hole;
2) ignore drilling rod internal and external pressure balance, suppose that the uncovered drilling rod in bottom inserts in cement paste, and the drilling rod bar wall body of insertion portion amasss in whole " suck-back enters " drilling rods of shared mud, with this understanding, according to the internal-and external diameter of cement paste post height, drilling rod in hole, calculate it bar wall body that " is inserted into the part in cement paste " of drilling rod long-pending; And then, converse the interior cement column of drilling rod with respect to the discrepancy in elevation outside drilling rod;
3) in drilling rod under the known prerequisite of cement column overall height, calculate the inside clear space of top rod, then calculate the inside clear space of well head to ground pipeline between mud pit, sum of the two is needs the follow-up mud amount being pressed into;
(9) follow-up mud pressure injection is complete, carries drilling rod on rapidly, and cleaning temporary guide base, proceeds to freezing pipe sinking operation.
Embodiment:
The mixture of the preferred sodium phosphate trimer of retarding agent and citric acid; The volume 0.50～0.6% of sodium phosphate trimer, the volume 0.2～0.3% of citric acid, the temperature of slow-setting cement grout is 35～40 DEG C.
(1) before cement paste stirs, first freezing hole is carried out to punching;
(2) be ready to slow-setting cement grout its preparing materials by every pond slurries consumption: cement, water, sodium bentonite, sodium phosphate trimer, citric acid and sodium carboxymethylcellulose;
(3) sodium phosphate trimer citric acid and sodium carboxymethylcellulose are added water and dissolved, institute's water requirement is deducted from slurries total water amount;
(4) sodium phosphate trimer, citric acid and sodium carboxymethylcellulose dissolve and finish or close on while end, add water in stirring pool, and start is stirred, and pours successively cement, sodium bentonite into;
(5) cement paste stir about 3min, after substantially stirring, mixes sodium phosphate trimer and citric acid solution, continues to stir 3min; Then carboxymethylcellulose sodium solution is added, then stir 3min, cement grout has stirred;
(6) open the pipeline valve between stirring pool and pulp storage tank, make cement grout flow into pulp storage tank temporary;
(7) open grouting pump, disposable the slurries in the pulp storage tank freezing hole that pumps into;
(8) slurries injection is complete, immediately slush pump pulp-absorbing pipe is gone to mud pit, in pipeline, is pressed into quantitative slurry, the necessary accurate-metering of mud amount; The computational methods of mud are as follows:
1), first according to cement paste cumulative volume and bore diameter, calculate without under drilling rod condition the overall height of cement paste post in freezing hole;
2) ignore drilling rod internal and external pressure balance, suppose that the uncovered drilling rod in bottom inserts in cement paste, and the drilling rod bar wall body of insertion portion amasss in whole " suck-back enters " drilling rods of shared mud, with this understanding, according to the internal-and external diameter of cement paste post height, drilling rod in hole, calculate it bar wall body that " is inserted into the part in cement paste " of drilling rod long-pending; And then, converse the interior cement column of drilling rod with respect to the discrepancy in elevation outside drilling rod;
3) in drilling rod under the known prerequisite of cement column overall height, calculate the inside clear space of top rod, then calculate the inside clear space of well head to ground pipeline between mud pit, sum of the two is needs the follow-up mud amount being pressed into;
(9) follow-up mud pressure injection is complete, carries drilling rod on rapidly, and cleaning temporary guide base, proceeds to freezing pipe sinking operation.Technology measure is as follows:
(1) special messenger is responsible for each freezing hole mud and replaces required cement grout and material usage calculating thereof.Once any initial parameter, as hole depth, ground length of pipe etc. change, slurries consumption and corresponding material usage must recalculate, and the mud amount that follow-up need are pressed into also must recalculate.
(2) special messenger is responsible for cement grout additive metering, guarantees Admixture, and the especially measuring accuracy of retarding agent, to ensure that grout coordinate ratio meets the requirements.
(3) cement grout temperature is lower, and the slow setting time is longer.For this reason, should extract down-hole cold water preparation, forbid to use the water preparation slow-setting cement grout after being exposed to the sun.
(4) necessary accurate-metering, strictly controls the follow-up mud amount being pressed into.The concrete initial parameter of supposing the solid pipe in an auxiliary shaft freezing hole is as follows: hole depth 774.3m, and aperture is by 200mm (the actual 195mm that is about), freezing pipe external diameter 133mm; Displacement height 100m; Drilling rod external diameter 89mm, internal diameter 69mm, ground pipeline (well head is to slush pump) length 63m, internal diameter is 65mm.Cement paste water/binder ratio 1.25: 1, calculus rate 71%, density 1.42t/m3.Result of calculation: the required amount of single hole sealing of hole needs slurries amount: 2.47m3; Follow-up pressure mud amount: 2.59m3.
The shutoff of considering freezing hole annular space is mainly that requirement cement paste has the as far as possible long initial setting time, and necessary final set, and cement paste consolidating strength be there is no to particular/special requirement, through investigation, final choice locality, Erdos Tian Heng cement plant, Etuoke Banner produce " chessboard well " board PO42.5 cement.
After cement grout has been prepared, As time goes on cement granules will precipitate.Also have 18h because freezing pipe sinking required time is the shortest, therefore, the quick bleed of slurries, precipitation, will aggravate bottom hydrated cementitious, promote it to condense, and be unfavorable for lower pipe.For this reason, should pass through admixture suspending agent, improve as much as possible the stability of slurries.
In cement grout, mix sodium bentonite, not only contribute to improve the stability of slurries, extend the cement granules sedimentation time, and contribute to improve slurries calculus rate.Therefore, tentatively determine admixture sodium bentonite in cement grout.In addition, cement grout bleed, precipitation are generally very fast, and its basic reason is that cement granules is larger, and its viscosity is very low.Given this, the plan sodium carboxymethylcellulose (CMC) that further admixture has good Efficient Adhesive Promotion in cement grout carrys out the stability of refinforced cement slurries, slows down its bleed settling velocity.
Adopt above-mentioned construction technology and technical measures, start first Drilling Water mud displacement operation in 2010-05-23-4:00.Slurry agitation used time 30min, then proceed on drilling rod carry, freezing pipe sinking operation, that night, about 22:00 completed first freezing hole lowering-in operation smoothly the most finally, did not occur any phenomenon of being obstructed in lower pipe process.2010-05-24 morning, the cement paste displacement work of the 2nd, the 3rd boring also launches in succession, and completes smoothly.Afterwards, adopt and use the same method, completed smoothly remaining 39 freezing hole cement paste displacement work.
In complete dark freeze-wellboring engineering, the solid pipe water shutoff of freezing hole is the key technique of guaranteeing mine construction safety and the safety in production of mine later stage.The solution of the key technical problems such as the slow-setting cement grout that the solid pipe water shutoff of freezing hole faces is prepared and freezing pipe sinks smoothly, not only has engineering practical value, also has very important theory significance.Realize the displacement of freezing hole slow-setting cement grout by said method, and calculated by strict slurries consumption and the follow-up required mud amount being pressed into, completed smoothly in high quality freezing hole cement paste displacement work.Practice shows, this extended slurry formula of liquid can be applicable to similar stratum, Inner Mongolia completely.
Claims (2)
1. a Water sealing method for replacing mud in freezing holes with slow setting cement grout, the basic cement grout proportioning of employing is: water/binder ratio 1～1.25: 1; Suspending agent and retarding agent that in basic cement grout, admixture weight is 1.5～2%; Described retarding agent is the mixture of one or both and two or more any mixing ratios in sodium pyrophosphate, sodium phosphate trimer, tartaric acid, sodium potassium tartrate tetrahydrate, citric acid or six kinds of retarding agent of zinc chloride; Wherein the admixture weight of sodium pyrophosphate is 0.1%～0.5%, the admixture weight of sodium phosphate trimer is 0.1%～0.6%, tartaric admixture weight is 0.2%～0.4%, the admixture weight of sodium potassium tartrate tetrahydrate is 0.4%～0.5%, the admixture weight of citric acid is 0.05%～0.35%, and the admixture weight of zinc chloride is 0.2%～0.3%; In above-mentioned cement grout, go back admixture weight and be 0.8～1% sodium carboxymethylcellulose; Above-mentioned suspending agent is sodium bentonite; It is characterized in that: described cement grout extracts down-hole cold water preparation, and described concrete grammar step is as follows:
(1) before cement paste stirs, first freezing hole is carried out to punching;
(2) be ready to slow-setting cement grout its preparing materials by every pond slurries consumption: cement, water, sodium bentonite, retarding agent and sodium carboxymethylcellulose;
(3) retarding agent and sodium carboxymethylcellulose are added water and dissolved, institute's water requirement is deducted from slurries total water amount;
(4) retarding agent and sodium carboxymethylcellulose dissolve and finish or close on while end, add water in stirring pool, and start is stirred, and pours successively cement, sodium bentonite into;
(5) cement paste stir about 3min, after substantially stirring, mixes retarding agent liquid, continues to stir 3min; Then carboxymethylcellulose sodium solution is added, then stir 3min, cement grout has stirred;
(6) open the pipeline valve between stirring pool and pulp storage tank, make cement grout flow into pulp storage tank temporary;
(7) open grouting pump, disposable the slurries in the pulp storage tank freezing hole that pumps into;
(8) slurries injection is complete, immediately slush pump pulp-absorbing pipe is gone to mud pit, in pipeline, is pressed into quantitative slurry, the necessary accurate-metering of mud amount; The computational methods of mud are as follows:
1), first according to cement paste cumulative volume and bore diameter, calculate without under drilling rod condition the overall height of cement paste post in freezing hole;
2) ignore drilling rod internal and external pressure balance, suppose that the uncovered drilling rod in bottom inserts in cement paste, and the drilling rod bar wall body of insertion portion amasss in whole " suck-back enters " drilling rods of shared mud, with this understanding, according to the internal-and external diameter of cement paste post height, drilling rod in hole, calculate it bar wall body that " is inserted into the part in cement paste " of drilling rod long-pending; And then, converse the interior cement column of drilling rod with respect to the discrepancy in elevation outside drilling rod;
3) in drilling rod under the known prerequisite of cement column overall height, calculate the inside clear space of top rod, then calculate the inside clear space of well head to ground pipeline between mud pit, sum of the two is needs the follow-up mud amount being pressed into;
(9) follow-up mud pressure injection is complete, carries drilling rod on rapidly, and cleaning temporary guide base, proceeds to freezing pipe sinking operation.
2. Water sealing method for replacing mud in freezing holes with slow setting cement grout according to claim 1, is characterized in that: described retarding agent is the mixture of sodium phosphate trimer and citric acid; The admixture weight of sodium phosphate trimer is 0.50～0.6%, and the admixture weight of citric acid is 0.2～0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110338871.0A CN102505944B (en) | 2011-10-25 | 2011-10-25 | Water sealing method for replacing mud in freezing holes with slow setting cement grout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110338871.0A CN102505944B (en) | 2011-10-25 | 2011-10-25 | Water sealing method for replacing mud in freezing holes with slow setting cement grout |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102505944A CN102505944A (en) | 2012-06-20 |
| CN102505944B true CN102505944B (en) | 2014-08-13 |
Family
ID=46218072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110338871.0A Active CN102505944B (en) | 2011-10-25 | 2011-10-25 | Water sealing method for replacing mud in freezing holes with slow setting cement grout |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102505944B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103938613B (en) * | 2014-04-08 | 2016-01-20 | 北方燕盛工程技术有限公司 | Freezing pipe slip casting check device |
| CN104045312B (en) * | 2014-06-18 | 2016-03-16 | 天地科技股份有限公司 | In a kind of freezing process, extended slurry replaces working fluid and the method for mud |
| CN104060992B (en) * | 2014-06-18 | 2016-03-09 | 天地科技股份有限公司 | Extended slurry displacement mud device in construction freezing method |
| CN104310847B (en) * | 2014-10-14 | 2017-02-15 | 中国电建集团中南勘测设计研究院有限公司 | Retarding high sulfate-resistant cement stable slurry |
| CN105236867B (en) * | 2015-09-28 | 2018-04-20 | 中煤特殊凿井有限责任公司 | Freezing pipe filling cement mortar and freezing pipe filling process |
| CN106979012B (en) * | 2017-05-25 | 2018-08-17 | 兖州煤业股份有限公司 | Hidden conduit pipe Comprehensive Treatment method in shaft of vertical well freezing hole |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3193648B2 (en) * | 1996-09-30 | 2001-07-30 | 旭光学工業株式会社 | binoculars |
| CN1544375A (en) * | 2003-11-13 | 2004-11-10 | 贵州省交通规划勘察设计研究院 | Polypropylene fibre cement mortar and its production method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2520967B2 (en) * | 1989-12-22 | 1996-07-31 | 積水化学工業株式会社 | Cement-based filler composition and existing pipe lining method |
-
2011
- 2011-10-25 CN CN201110338871.0A patent/CN102505944B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3193648B2 (en) * | 1996-09-30 | 2001-07-30 | 旭光学工業株式会社 | binoculars |
| CN1544375A (en) * | 2003-11-13 | 2004-11-10 | 贵州省交通规划勘察设计研究院 | Polypropylene fibre cement mortar and its production method |
Non-Patent Citations (2)
| Title |
|---|
| 程志彬等.缓凝水泥浆置换冻结孔泥浆封水技术.《建井技术》.2010,(第06期), |
| 缓凝水泥浆置换冻结孔泥浆封水技术;程志彬等;《建井技术》;20101230(第06期);28-30和5 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102505944A (en) | 2012-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102505944B (en) | Water sealing method for replacing mud in freezing holes with slow setting cement grout | |
| CN102757206B (en) | Mine fracture grouting material and usage method thereof | |
| CN101628800B (en) | Early strength cement grout with low dehydration ratio for grouting | |
| CN101603427B (en) | Shield synchronization slip casting construction technology | |
| CN101806059B (en) | Drilling, grouting and sand-throwing process of ground surface of mined-out region under highway | |
| CN102964142B (en) | Foaming agent for lightweight grouting material | |
| CN102660952B (en) | Controllable clay paste slurry grouting technique | |
| CN109437771A (en) | A kind of mining flexible hole-sealing grouting material | |
| CN101597497B (en) | Water glass-triacetyl glycerine grouting material and preparation method thereof | |
| CN109574584A (en) | The preparation method of dual control cement slurry for karst foundation slip casting | |
| CN101239803A (en) | Ultra-fine cement slurry for reinforcing powder fine sand and preparation method thereof | |
| CN103396065A (en) | Synchronous grouting grout for shield construction control and grouting method thereof | |
| CN102505701B (en) | Self-compaction mortar and deep hole curtain pouring construction method | |
| CN102060487B (en) | Retarding cement slurry composite for replacement of super-deep freezing hole and preparation method thereof | |
| CN107191188A (en) | The bad water-bearing layer positioning targeting slip casting Mine Shaft Lining of rock section, constructing device and method | |
| CN103045215B (en) | Aluminate cement-based carbon dioxide corrosion resistant cement system for cementing of well | |
| CN113943130A (en) | Formula and grouting process of shield tunnel timed-setting wall-grouting material | |
| CN104790982A (en) | Enclosed mud for underground excavation tunnel ultra-deep hole grouting | |
| CN104446640A (en) | Foam tail mortar and pulping and grouting process thereof | |
| CN207377561U (en) | The bad water-bearing layer positioning targeting slip casting Mine Shaft Lining of rock section and constructing device | |
| CN103174428B (en) | A kind of applied chemistry slurries implement the method for grouting for water blocking to vertical shaft | |
| CN104533340A (en) | High-pressure-bearing temporary plugging method | |
| CN107500592A (en) | A kind of alkali-free quick-coagulant composition solution and preparation method thereof | |
| CN109608144A (en) | It is a kind of to coagulate the adjustable solidifying grouting material of type and its application fastly | |
| CN104452767A (en) | Waste slurry processing and construction technology for drilled pile in karst area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |