CN105134202A - Layered water pumping method - Google Patents
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- CN105134202A CN105134202A CN201510517476.7A CN201510517476A CN105134202A CN 105134202 A CN105134202 A CN 105134202A CN 201510517476 A CN201510517476 A CN 201510517476A CN 105134202 A CN105134202 A CN 105134202A
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Abstract
The invention provides a layered water pumping method. The method comprises the steps of diving a water-pumping hole into corresponding n segments according to the number of aquifer segments, conducting graded broaching, tripping in waterproof pipes into the segments, from the first segment to the (n-1)<th> segment, of the water-pumping hole for conducting isolated water stopping, tripping in an n<th> water-pumping pipe in the n<th> segment of the water-pumping hole for pumping water, after water pumping succeeds, pulling out the n<th> water-pumping pipe, and using cement slurry for closing the n<th> segment of the water-pumping hole starting from the hole bottom; then completing the water pumping test for the n<th> segment of the water-pumping hole. Then the water pumping test is conducted in sequence from the (n-1) <th> segment to the first segment of the water-pumping hole according to the method. By means of the layered water pumping method, disturbance toward the hole wall of a water-pumping hole caused by frequent ascending and descending of waterproof pipes in a conventional method can be decreased to the greatest extent, water pumping test failure caused by collapse of the water-pumping hole can be effectively avoided, and the success rate of the water pumping test is greatly raised; the construction period can be shortened, the cost can be lowered, the labor intensity can be reduced, and the working efficiency can be improved.
Description
Technical field
The present invention relates to a kind of layering pumping method, be particularly useful for coalfield soft stratum layering and draw water, belong to geological prospecting hole layering pumping method technical field.
Background technology
It is the technology often used in Hydrogeological Work that layering is drawn water, its advantage need not construct to drill through multiple boring, only need a boring independently can extract laying respectively at the water of (multiple water-bearing interval can be included in a depth segment) in the different depth section of stratum separately, thus can the hydrogeological characteristics of water-bearing interval rapidly and in the different depth section on the understanding ad-hoc location stratum of low cost.
There is in prior art a kind of layering pumping method, comprise the steps:
1) suction eye is prepared; First, drill through suction eye or reaming is carried out to completed geological prospecting hole and become suction eye; Then, suction eye is divided into corresponding multistage (being described for three sections) by the quantity according to water-bearing interval, wherein, the first paragraph degree of depth of suction eye is 0-a rice, aperture is A millimeter, and the second segment degree of depth of suction eye is a-b rice, and aperture is B millimeter, the 3rd section of degree of depth of suction eye is b-c rice, and aperture is C millimeter; Wherein, a < b < c, and A > B > C;
2) first paragraph of suction eye is drawn water; First, the first drinking-water pipe bottom being fixedly connected with encapsulant is lowered in the first paragraph of suction eye, first drinking-water pipe sidewall is provided with permeable hole, it is inner that the water that the water-bearing interval being positioned at suction eye first paragraph oozes out can flow into the first drinking-water pipe through permeable hole, be located at the encapsulant bottom the first drinking-water pipe, the second segment sealing of the first paragraph of suction eye and suction eye can be separated, prevent the water that the water-bearing interval being positioned at suction eye second segment oozes out to be mixed into the first drinking-water pipe inside; Then, well-flushing operation is carried out to the first paragraph of suction eye, after clean to water sand removal, carry out pumping test from the first drinking-water pipe inside, extract the water obtained from the first drinking-water pipe inside and be the water that the water-bearing interval that is positioned at suction eye first paragraph oozes out;
3) second segment of suction eye is drawn water; First, the first drinking-water pipe is extracted from the first paragraph of suction eye; Then, be lowered in the first paragraph of suction eye by the first guard tube, the first guard tube is used for the water segregation oozed out by the water-bearing interval being positioned at suction eye first paragraph, prevents the water that itself and the water-bearing interval being positioned at suction eye second segment ooze out from mixing; Then, the second drinking-water pipe bottom being provided with encapsulant passes from the first guard tube inside, be lowered in the second segment of suction eye, second drinking-water pipe sidewall is provided with permeable hole equally, it is inner that the water that the water-bearing interval being positioned at suction eye second segment oozes out can enter into the second drinking-water pipe through permeable hole, be located at the encapsulant bottom the second drinking-water pipe, 3rd section of sealing of the second segment of suction eye and suction eye can be separated, prevent the water that the water-bearing interval being positioned at suction eye the 3rd section oozes out to be mixed into the second drinking-water pipe inside; Finally, well-flushing operation is carried out to the second segment of suction eye, after clean to water sand removal, draw water from the second drinking-water pipe inside, extract the water obtained and be the water that the water-bearing interval that is positioned at suction eye second segment oozes out;
4) the 3rd section of suction eye is drawn water; First, the second drinking-water pipe is extracted from the second segment of suction eye; Then, second guard tube is passed from the first guard tube inside, be lowered in the second segment of suction eye, the second guard tube is used for the water segregation that oozed out by the water-bearing interval being positioned at suction eye second segment, prevents the water that itself and the water-bearing interval of the 3rd section that is positioned at suction eye ooze out from mixing; Then, the 3rd drinking-water pipe bottom being provided with encapsulant passes from the first guard tube, the second guard tube inside successively, be lowered in the 3rd section of suction eye, 3rd drinking-water pipe sidewall is provided with permeable hole equally, and the water oozed out from the water-bearing interval of the 3rd section that is positioned at suction eye can enter into the 3rd drinking-water pipe inside through permeable hole; Finally, the 3rd section to suction eye is carried out well-flushing operation, after clean to water sand removal, draws water from the 3rd drinking-water pipe inside, extracts the water obtained and is the water that the water-bearing interval that is positioned at suction eye the 3rd section oozes out;
5) pumping test is terminated; By the 3rd drinking-water pipe, the second guard tube and the first guard tube successively from the 3rd of suction eye the section, extract the second segment of suction eye and the first paragraph of suction eye, terminate pumping test.
Above-mentioned layering pumping method of the prior art independently can be drawn into separately the water that the water-bearing interval that is arranged in different depth section suction eye oozes out in a boring, provides conveniently, but still have following technological deficiency in actual applications to exploration:
Because the hole wall soundness of suction eye is poor, entering down each time and extracting of well-flushing and pipeline all can cause disturbance to it, very easily there is hole wall collapse in the suction eye repeatedly after disturbance, causes suction eye to block, and then cause drinking-water pipe, guard tube to enter down, when chocking-up degree is lighter, need to carry out open-work to suction eye, when chocking-up degree is heavier, pumping test may be caused to proceed, can only redrilling, again test.
Above-mentioned pumping method of the prior art, before the pumping test completing suction eye the 3rd section, enter and extract operation under needing to ensure the drinking-water pipe that completes in the first paragraph of suction eye and the second segment of suction eye and guard tube and all can not cause hole wall collapse, and in fact, before the 3rd section that the 3rd drinking-water pipe is lowered into suction eye, enter under needing to complete the first drinking-water pipe in the first paragraph of suction eye and extract operation respectively once, operation is entered once under first guard tube, well-flushing operation once, enter complete the second drinking-water pipe in the second segment of suction eye under and extract operation respectively once, operation is entered once under second guard tube, well-flushing operation once, also namely before the 3rd section that the 3rd drinking-water pipe is lowered into suction eye, need the first paragraph 4 times of at least disturbance suction eye, the second segment of suction eye 4 times, this increases the probability caved in of suction eye greatly, suction eye is once cave in, seriously can reduce the operating efficiency of pumping test, and cause a large amount of wastes of manpower and materials.In addition, if suction eye is positioned at the soft sandstone of geology, shale, Mudstone Area, above-mentioned pumping method of the prior art seldom can complete the pumping test of suction eye the 3rd section.And when the hop count of suction eye is greater than 4, the risk that the final stage of suction eye can not complete pumping test more can improve greatly.
Summary of the invention
Therefore, the technical problem to be solved in the present invention be to overcome layering pumping method of the prior art due to needs repeatedly disturbance suction eye, easily cause suction eye to cave in, so that the technological deficiency of pumping test cannot be completed, thus provide a kind of few to suction eye disturbance number of times, not easily cave in, thus can complete the layering pumping method of pumping test fast.
For this reason, the invention provides a kind of layering pumping method, comprise the steps,
1) prepare suction eye, and according to the quantity of water-bearing interval, described suction eye be divided into corresponding n section, wherein n be more than or equal to 2 natural number, and n-th of described suction eye section of degree of depth is the darkest;
2) under the 1st intersegmental part of described suction eye, enter the first guard tube, described first guard tube extends to the 1st section of bottom of described suction eye from the aperture of described suction eye; Under the 2nd intersegmental part of described suction eye, enter the second guard tube, described second guard tube extends to the 2nd section of bottom of described suction eye from the aperture of described suction eye; Continued operation like this, until enter the (n-1)th guard tube under the (n-1)th intersegmental part of described suction eye; Under the n-th intersegmental part of described suction eye, enter the n-th drinking-water pipe, described n-th drinking-water pipe extends to n-th section of bottom of described suction eye from the aperture of described suction eye;
3) carry out well-flushing to n-th section of described suction eye, after clean to water sand removal, n-th section to described suction eye is drawn water;
4) n-th section of described suction eye draw water after, described n-th drinking-water pipe to be extracted, and by n-th of described suction eye section of (n-1)th section of seal isolation with described suction eye;
5) described (n-1)th guard tube is extracted, under the (n-1)th intersegmental part of described suction eye, enter the (n-1)th drinking-water pipe;
6), after the n in step 3), step 4) and step 5) being transformed into n-1, step 3), step 4) and step 5) is repeated, until complete drawing water of the 1st section of described suction eye.
As a kind of preferred version, in described step 4), adopt slush pump to pump into cement grout to n-th section of described suction eye, n-th section to described suction eye seals, thus by n-th of described suction eye section of (n-1)th section of seal isolation with described suction eye.
As a kind of preferred version, in described step 1), the internal diameter of (n-1)th section of suction eye described in the internal diameter < of n-th section of described suction eye.
As a kind of preferred version, described step 2) in, before guard tube being lowered into described suction eye inside, be also included in the fixing step being wound around sea-tangle bottom guard tube.
As a kind of preferred version, in described step 1), adopt boring or described suction eye is obtained to the mode that geology exploratory hole carries out classification reaming.
As a kind of preferred version, hole wall is adopted to be provided with the hollow tube of permeable hole as drinking-water pipe.
As a kind of preferred version, described drinking-water pipe comprises at least one section of tube wall and is provided with permeable section of permeable hole and fluid-tight waterproof section of at least one section of tube wall, and adjacent described permeable section and described waterproof section is welded to connect; After described drinking-water pipe inserts described suction eye, described permeable section corresponding with the water-bearing interval being positioned at described suction eye, and the two ends of described permeable section extend to outside the lower edges of described water-bearing interval.
As a kind of preferred version, 3-5m place outside the lower edges that the two ends of described permeable section extend to described water-bearing interval.
As a kind of preferred version, also comprise and described suction eye is detected, to obtain the quantity of water-bearing interval, position and thickness, thus under correspondence, enter the step of described drinking-water pipe.
As a kind of preferred version, in described step 1), the separation of adjacent for described suction eye two sections is arranged on water proof rock stratum inner, and described separation is greater than 3m apart from the distance at described water-bearing interval edge.
As a kind of preferred version, described separation is 3-5m apart from the distance at described water-bearing interval edge.
" water-bearing interval " in the present invention refers to the one section of water-bearing interval being arranged in stratum, and it can be an independent aquifer, also can be comprise multiple little aquifer with same nature.
A kind of layering pumping method of the present invention has the following advantages:
1. layering pumping method of the present invention, compared with prior art, creationary employing order is from bottom to top drawn water to suction eye, namely first under the darkest suction eye n-th intersegmental part in position, the n-th drinking-water pipe is entered, guard tube is entered under all the other intersegmental parts of suction eye, guard tube can be protected all the other sections of suction eye, and in n-th section of suction eye, insert drinking-water pipe when drawing water, to the disturbance number of times of all the other sections of suction eye for once, can available protecting suction eye, suction eye is not easily caved in, thus drawing water of the darkest suction eye in position n-th section can be completed smoothly, after the pumping operation that suction eye is n-th section completes, close measure is adopted to carry out seal isolation by n-th of suction eye section with (n-1)th section of suction eye, again the (n-1)th guard tube is extracted in (n-1)th section of suction eye, insert the (n-1)th drinking-water pipe, (n-1)th section to suction eye is drawn water, the like, until complete the pumping operation of the first paragraph of suction eye,
In a word, layering pumping method of the present invention can reduce conventional method to greatest extent and frequently remove the disturbance of guard tube to suction eye hole wall, effectively avoid because of suction eye cave in cause pumping test failure, greatly improve the success rate of pumping test; Can also the reduction of erection time, reduce costs, reduce labour intensity, increase work efficiency.
2. layering pumping method of the present invention, in step 4), adopt slush pump to pump into cement grout to n-th section of suction eye, n-th section to described suction eye seals, and sealing is effectively simple; After carrying out pumping operation to n-th section of suction eye, the hole wall that suction eye is n-th section likely becomes soft, the risk of caving in rises, n-th section of suction eye once cave in, can impact the geological condition of suction eye (n-1)th section, and then impact is positioned at the infiltration situation of suction eye (n-1)th section of water-bearing interval; N-th section to suction eye pumps into cement grout, cement grout is after the n-th intersegmental part condensation of suction eye, caving in of suction eye n-th section can not only be avoided, n-th of suction eye section (n-1)th section with suction eye thoroughly can also be isolated, the water breakthrough seal approach (as sea-tangle sealing) preventing the water-bearing interval being positioned at suction eye n-th section from oozing out enters into the (n-1)th intersegmental part of suction eye, and then affects the hydrogeological parameter of (n-1)th section of suction eye.
3. layering pumping method of the present invention, in step 1), the internal diameter of the internal diameter < suction eye (n-1)th section of suction eye n-th section, the junction that such suction eye is adjacent two sections will form a step, thus conveniently holds guard tube from bottom.
4. layering pumping method of the present invention, before guard tube is lowered into suction eye inside, fixing winding sea-tangle bottom guard tube, sea-tangle is met water and expands, firmly seal up between guard tube outer wall and suction eye inwall, thus prevent the water being positioned at guard tube outside from entering into guard tube inside, thus it is pure to ensure that suction eye correspondent section is drawn water.
5. layering pumping method of the present invention, employing obtains suction eye to the mode that geology exploratory hole carries out reaming, use ready-made geological prospecting hole and carry out reaming, boring difficulty can not only be reduced, can also before reaming be carried out to geology exploratory hole, in advance geology exploratory hole is detected, thus choose suitable geological prospecting hole and carry out reaming.
6. layering pumping method of the present invention, drinking-water pipe comprises at least one section of tube wall and is provided with permeable section of permeable hole and fluid-tight waterproof section of at least one section of tube wall, be welded to connect between adjacent permeable section and waterproof section, after drinking-water pipe inserts suction eye, permeable section corresponding with the water-bearing interval of suction eye inside, and the two ends of described permeable section extend to outside the lower edges of described water-bearing interval, during owing to carrying out well-flushing and pumping operation to suction eye, disturbance can be caused to the hole wall of suction eye, there is the possibility outwards expanding and partly stretch into permeable hole in the part rock grain on hole wall, after more rock grain part stretches into permeable hole, people are difficult to drinking-water pipe to extract out, even if strengthen strength by after drinking-water pipe extraction, rock grain also may cause damage to drinking-water pipe, and when drinking-water pipe is extracted out from suction eye, also there is the risk that disturbance suction eye causes hole wall collapse, drinking-water pipe of the present invention adopts permeable section to combine with waterproof section, make permeable section corresponding with the water-bearing interval of suction eye inside, effect of drawing water can not be affected, there is no the part of water-bearing interval, use waterproof section, the distribution area of permeable hole can be reduced, reduce rock grain enters permeable hole quantity because of expansion, be convenient to the extraction of drinking-water pipe, in addition, to be provided with permeable section of permeable hole expensive for tube wall on the market, and waterproof section of price tube wall not being arranged permeable hole is lower, and drinking-water pipe of the present invention also has lower-cost advantage.
7. layering pumping method of the present invention, in step 1), is arranged on water proof rock stratum inner, is not only conducive to the seal isolation between adjacent two sections of suction eye, is also convenient to the installation of guard tube or drinking-water pipe by the separation of adjacent for suction eye two sections.In addition, the distance arranging separation distance water-bearing interval edge is greater than 3m, can be convenient to that drinking-water pipe is better corresponding with water-bearing interval to be installed, thus better draws water to the infiltration of water-bearing interval.
Detailed description of the invention
Below a kind of layering pumping method provided by the invention is described in further detail.
Embodiment
The present embodiment provides a kind of layering pumping method, and be described for Ku Lanka diligent dry mining area, Zhun Dong coalfield, Xinjiang coal exploration boring ZK16-3, step is as follows:
1) suction eye is prepared, choose completed geological prospecting hole and carry out classification reaming, first top tertiary stratum 0-104m is expanded to Φ 190mm(diameter) hole diameter (i.e. the first paragraph of suction eye), again Jurassic of central stratum 104-370m is expanded to Φ 146mm hole diameter (i.e. the second segment of suction eye), finally by bottom coal measure strata 370-794m expansion to the hole diameter (i.e. suction eye the 3rd section) of Φ 110mm;
2) in the first paragraph of suction eye, subordinate enters external diameter is Φ 168mm first guard tube 104m, and in the second segment of suction eye, subordinate enters external diameter is Φ 127mm second guard tube 370m; Under the 3rd intersegmental part of suction eye, enter external diameter is Φ 127mm the 3rd drinking-water pipe 794m;
3) carry out well-flushing to the 3rd section of suction eye, after clean to water sand removal, the 3rd section to suction eye is drawn water;
4) the 3rd section of suction eye draw water after, 3rd drinking-water pipe is extracted, use slush pump to pump into cement grout to the 3rd section of suction eye, carry out sealing of hole (i.e. suction eye 370-794m section) to the 3rd section of suction eye thus by the 3rd of suction eye the section of second segment seal isolation with suction eye;
5) after treating the cement initial set in step 4), extracted by the second guard tube, in the second segment of suction eye, subordinate enters the second drinking-water pipe 370m that external diameter is Φ 127mm;
6) well-flushing is carried out to the second segment of suction eye, after clean to water sand removal, the second segment of suction eye is drawn water;
7) after the second segment of suction eye draws water, second drinking-water pipe is extracted, use slush pump to pump into cement grout to the second segment of suction eye, sealing of hole (i.e. suction eye 104-370m section) is carried out to the second segment of suction eye, thus by the first paragraph seal isolation of the second segment of suction eye and suction eye;
8) after treating the cement initial set in step 7), extracted by the first guard tube, in the first paragraph of suction eye, subordinate enters the first drinking-water pipe 104m that external diameter is Φ 168mm;
9) well-flushing is carried out to the first paragraph of suction eye, after clean to water sand removal, the first paragraph of suction eye is drawn water;
10), after drawing water, extract the first drinking-water pipe out, complete pumping test.
The layering pumping method of the present embodiment, order is from bottom to top adopted to draw water to boring, compared with prior art, conventional method can be reduced to greatest extent and frequently play the disturbance of setting of casing to borehole wall, effectively avoid the pumping test failure because borehole collapse causes, greatly improve the success rate of pumping test; Stop conventional pumping test middle and lower part water-bearing interval to affect the waterpower of the section of drawing water, ensure the accuracy of acquired hydrogeological parameter; Can also the reduction of erection time, reduce costs, reduce labour intensity, increase work efficiency.
Above-mentioned steps 3), 6) and 9) in well-flushing refer to, adopt sodium pyrophosphate to soak 24h to water-bearing interval, then carry out carrying cylinder, piston, water pump combine and carry out well-flushing 24h, reach water sand removal clean, this belongs to prior art in the art.
Above-mentioned steps 3), 6) and 9) in, carry out the pumping test of three journeys that fall according to code requirement, drawdown is 2-4m, meets mine and coal hydrogeology pumping test code requirement stabilization time.
The layering pumping method of the present embodiment, in step 4), adopt slush pump to pump into cement grout to n-th section of suction eye, n-th section to described suction eye seals, and sealing is effectively simple; After carrying out pumping operation to n-th section of suction eye, the hole wall that suction eye is n-th section likely becomes soft, the risk of caving in rises, n-th section of suction eye once after caving in, can impact the geological condition of suction eye (n-1)th section, and then impact is positioned at the infiltration situation of suction eye (n-1)th section of water-bearing interval; N-th section to suction eye pumps into cement grout, cement grout is after the n-th intersegmental part condensation of suction eye, caving in of suction eye n-th section can not only be avoided, n-th of suction eye section (n-1)th section with suction eye thoroughly can also be isolated, the water breakthrough seal approach (as sea-tangle sealing) preventing the water-bearing interval being positioned at suction eye n-th section from oozing out enters into the (n-1)th intersegmental part of suction eye, and then affects the hydrogeological parameter of (n-1)th section of suction eye.
As a kind of preferred version, before guard tube is lowered into suction eye inside, fixing winding sea-tangle bottom guard tube, specifically in the present embodiment, in step 2) in, be wound around the thick sea-tangle of 11mm at the 103-104m place of the first guard tube and be used for hermetic seal; Sea-tangle hermetic seal after the 369-370m place of the second guard tube is wound around 9mm; Sea-tangle is met water and expands, and firmly seal up, thus prevent the water of guard tube outside from entering into guard tube inside, thus it is pure to ensure that suction eye the 3rd section draws water by between guard tube outer wall and suction eye inwall.
As a kind of deformation program, in step 1), the mode of boring can also be adopted to obtain suction eye.In addition, before choosing geological prospecting hole and carrying out reaming, geophysical prospecting equipment can also be used to detect in advance geology exploratory hole, to know stratum characteristic and the water-bearing interval positional information of corresponding geology exploratory hole.Further, in step 1), the separation of adjacent for suction eye two sections is arranged on water proof rock stratum inner, and the distance at separation distance water-bearing interval edge is greater than 3m, not only be conducive to the seal isolation between adjacent two sections of suction eye, be also convenient to the installation of guard tube.As a kind of improvement project, the distance that can arrange separation distance water-bearing interval edge is 3-5m.
As a kind of preferred version, drinking-water pipe comprises permeable section and fluid-tight waterproof section of the tube wall that tube wall is provided with permeable hole, be welded to connect between adjacent permeable section and waterproof section, after drinking-water pipe inserts suction eye, permeable section corresponding with the water-bearing interval of suction eye inside, and the two ends of described permeable section extend to described water-bearing interval lower edges outside (more preferably, the two ends of permeable section extend to described water-bearing interval lower edges outside 3-5m place), during owing to carrying out well-flushing and pumping operation to suction eye, disturbance can be caused to the hole wall of suction eye, there is the possibility outwards expanding and partly stretch into permeable hole in the part rock grain on hole wall, after more rock grain part stretches into permeable hole, people are difficult to drinking-water pipe to extract out, even if strengthen strength by after drinking-water pipe extraction, rock grain also may cause damage to drinking-water pipe, and when drinking-water pipe is extracted out from suction eye, also there is the risk that disturbance suction eye causes hole wall collapse, drinking-water pipe of the present invention adopts permeable section to combine with waterproof section, make permeable section corresponding with the water-bearing interval of suction eye inside, effect of drawing water can not be affected, there is no the part of water-bearing interval, use waterproof section, the distribution area of permeable hole can be reduced, reduce rock grain enters permeable hole quantity because of expansion, be convenient to the extraction of drinking-water pipe, in addition, to be provided with permeable section of permeable hole expensive for tube wall on the market, and waterproof section of price tube wall not being arranged permeable hole is lower, and drinking-water pipe of the present invention also has lower-cost advantage.
The present embodiment only lists one preferred embodiment, those skilled in the art can predict easily, layering pumping method of the present invention, can also be used for suction eye being divided into 4 sections, 5 sections, 6 sections, the even more layering pumping test of multistage, in addition, the hole diameter that above-mentioned suction eye is each section, and being fit into the guard tube of suction eye and the external diameter of drinking-water pipe, those skilled in the art can adjust flexibly according to actual conditions.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. a layering pumping method, is characterized in that: comprise the steps,
1) prepare suction eye, and according to the quantity of water-bearing interval, described suction eye be divided into corresponding n section, wherein n be more than or equal to 2 natural number, and n-th of described suction eye section of degree of depth is the darkest;
2) under the 1st intersegmental part of described suction eye, enter the first guard tube, described first guard tube extends to the 1st section of bottom of described suction eye from the aperture of described suction eye; Under the 2nd intersegmental part of described suction eye, enter the second guard tube, described second guard tube extends to the 2nd section of bottom of described suction eye from the aperture of described suction eye; Continued operation like this, until enter the (n-1)th guard tube under the (n-1)th intersegmental part of described suction eye; Under the n-th intersegmental part of described suction eye, enter the n-th drinking-water pipe, described n-th drinking-water pipe extends to n-th section of bottom of described suction eye from the aperture of described suction eye;
3) carry out well-flushing to n-th section of described suction eye, after clean to water sand removal, n-th section to described suction eye is drawn water;
4) n-th section of described suction eye draw water after, described n-th drinking-water pipe to be extracted, and by n-th of described suction eye section of (n-1)th section of seal isolation with described suction eye;
5) described (n-1)th guard tube is extracted, under the (n-1)th intersegmental part of described suction eye, enter the (n-1)th drinking-water pipe;
6), after the n in step 3), step 4) and step 5) being transformed into n-1, step 3), step 4) and step 5) is repeated, until complete drawing water of the 1st section of described suction eye.
2. layering pumping method according to claim 1, it is characterized in that: in described step 4), slush pump is adopted to pump into cement grout to n-th section of described suction eye, n-th section to described suction eye seals, thus by n-th of described suction eye section of (n-1)th section of seal isolation with described suction eye.
3. layering pumping method according to claim 1 and 2, is characterized in that: in described step 1), the internal diameter of (n-1)th section of suction eye described in the internal diameter < of n-th section of described suction eye.
4. layering pumping method according to claim 1, is characterized in that: described step 2) in, before guard tube being lowered into described suction eye inside, be also included in the fixing step being wound around sea-tangle bottom guard tube.
5. layering pumping method according to claim 1, is characterized in that: in described step 1), adopts boring or obtains described suction eye to the mode that geology exploratory hole carries out classification reaming.
6. layering pumping method according to claim 1, is characterized in that: adopt hole wall to be provided with the hollow tube of permeable hole as drinking-water pipe.
7. layering pumping method according to claim 6, it is characterized in that: described drinking-water pipe comprises at least one section of tube wall and is provided with permeable section of permeable hole and fluid-tight waterproof section of at least one section of tube wall, and adjacent described permeable section and described waterproof section is welded to connect; After described drinking-water pipe inserts described suction eye, described permeable section corresponding with the water-bearing interval being positioned at described suction eye, and the two ends of described permeable section extend to outside the lower edges of described water-bearing interval.
8. layering pumping method according to claim 7, is characterized in that: 3-5m place outside the lower edges that the two ends of described permeable section extend to described water-bearing interval.
9. layering pumping method according to claim 8, is characterized in that: also comprise and detecting described suction eye, to obtain the quantity of water-bearing interval, position and thickness, thus enters the step of described drinking-water pipe under correspondence.
10. the layering pumping method according to any one of claim 6-8, it is characterized in that: in described step 1), the separation of adjacent for described suction eye two sections is arranged on water proof rock stratum inner, and described separation is greater than 3m apart from the distance at described water-bearing interval edge.
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| CN115370344A (en) * | 2022-08-01 | 2022-11-22 | 国投新疆罗布泊钾盐有限责任公司 | Salt lake underground brine collecting system and construction method thereof |
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Effective date of registration: 20200904 Address after: 271021 beishoudi mining building, Changcheng Road, Tai'an City, Shandong Province Patentee after: SHANDONG PROVINCIAL BUREUA OF GEOLOGY & MINERAL RESOURCES FIFTH GEOLOGICAL BRIGADE (SHANDONG FIFTH GEOLOGICAL AND MINERAL EXPLORATION ACADEMY) Address before: 250014, No. ten, No. 13632, Ji'nan, Shandong Co-patentee before: Zhang Jiahao Patentee before: Zhang Yunfeng |
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