LU500328B1 - Drilled hole stratified filling method - Google Patents
Drilled hole stratified filling method Download PDFInfo
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- LU500328B1 LU500328B1 LU500328A LU500328A LU500328B1 LU 500328 B1 LU500328 B1 LU 500328B1 LU 500328 A LU500328 A LU 500328A LU 500328 A LU500328 A LU 500328A LU 500328 B1 LU500328 B1 LU 500328B1
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- optical cable
- drilled hole
- temperature sensing
- formation
- rock
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000003287 optical effect Effects 0.000 claims abstract description 84
- 239000011435 rock Substances 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 34
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 27
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 230000008859 change Effects 0.000 claims abstract description 9
- 238000005553 drilling Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000000945 filler Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 claims description 3
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000010408 sweeping Methods 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 abstract description 24
- 239000004575 stone Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
- E21B47/135—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency using light waves, e.g. infrared or ultraviolet waves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/138—Plastering the borehole wall; Injecting into the formation
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Earth Drilling (AREA)
Abstract
The present invention discloses a drilled hole stratified filling method. The method specifically includes the following steps: S1. dividing geological formation-complexes according to geological drilling lithology, and drawing a rock formation position map; S2. testing density, strength and deformation parameters of different formation-complexes; S3. selecting filling materials, and obtaining filling material proportions of the different formation-complexes via a crossover trial method; S4. vertically implanting a temperature sensing optical cable into a drilled hole; S5. predicting injection volumes required by the different formation-complexes, and preparing grouting according to a volume of 1.5 times; and S6. accurately positioning a position that has been filled by utilizing a change of the temperature sensing optical cable to achieve the purpose of accurate stratified filling in combination with the rock formation position map. The filling materials of different proportions are adopted with their density, strength and deformation parameters matched with corresponding rock formations, and then filling positions are accurately positioned by utilizing the change of the temperature sensing optical cable, so that accurate stratified filling can be realized, and the problem of large monitoring errors caused by indiscriminate grouting filling of unified materials is solved.
Description
DRILLED HOLE STRATIFIED FILLING METHOD LU500328
BACKGROUND Technical Field The present invention relates to the field of drilled hole grouting, in particular to a drilled hole stratified filling method. Related Art In the field of underground resource mining, in order to monitor deformation damage of underground rock formations, a monitoring sensor is implanted into a specific underground rock formation position through a drilled hole usually, and then the drilled hole is filled by grouting to ensure that the sensor can make full contact with a formation, so that relatively real monitoring results are obtained.
However, at present, fillers are deployed mainly according to the average strength of formations to fill different horizons in the drilled hole indiscriminately, resulting in the problems that the fillers have differences from surrounding rock in strength and deformation properties and geological rock formation horizons in the drilled hole cannot be distinguished, and consequently monitoring results and actual rock formations have large errors. Therefore, an accurate drilled hole filling method is in urgent need to adapt to grouting filling of different rock formations.
SUMMARY To overcome the defects in the background art, the present invention aims to provide a drilled hole stratified filling method. Filling material proportions of different formation- complexes are obtained via a crossover trial method, so that density, strength and deformation parameters of proportioned materials are matched with corresponding rock formations; and then a position that has been filled is accurately positioned by utilizing a change of a temperature sensing optical cable, so that the purpose of accurate stratified filling is achieved in combination with a rock formation position map, and the problem of large monitoring errors caused by indiscriminate grouting filling of unified materials is solved.
The object of the present invention can be implemented through the following technical solution: A drilled hole stratified filling method specifically includes the following steps: S1. dividing geological formation-complexes according to geological drilling lithology, and drawing a rock formation position map; S2. testing density, strength and deformation parameters of different formation- complexes;
S3. selecting filling materials, and obrainine material proportions of the differeht/500328 formation-complexes via a crossover trial method to make a matching degree of density, strength and deformation parameters of the proportioned materials meet monitoring requirements; S4. vertically implanting a temperature sensing optical cable into a drilled hole; SS. predicting injection volumes required by the different formation-complexes according to a diameter of the drilled hole and a total thickness of the different formation- complexes and according to a volumetric method, and preparing according to a volume of 1.5 times considering grout leakage, hole wall damage, hole wall rock absorption and other factors, where a calculating formula is as follows: V = (Ly x H,x1.5 2 > in the formula, Vi is an injection volume of the i! formation-complex, ¢ is a hole diameter of the drilled hole, and Hi is a total thickness of the i formation-complex; and S6. accurately positioning a position that has been filled by utilizing a change of the temperature sensing optical cable according to a difference in heat transmission of a filled area and a non-filled area, so as to achieve the purpose of accurate stratified filling in combination with the rock formation position map.
Preferably, the filling materials in step S3 include portland cement, dried river sand, rubbles, a naphthalene sulfonate based water reducer and water, a particle size of the dried river sand is 0.3-0.5 mm, and a particle size of the rubbles is 15-20 mm.
Preferably, proportioning of the filling materials in step S3 includes the following steps: (1) selecting mixture materials, and proportioning via weight proportions; (2) making and curing hole sealing cement paste with curing time of 20 days or above; (3) making a cylinder with a diameter of 50 mm and a height of 100 mm and a cylinder with a diameter of 50 mm and a height of 25 mm as rock core and filler samples; (4) performing a non-lateral-confinement uniaxial stress-strain test and a uniaxial shear strength test on a rock sample and the filler sample; (5) comparatively analyzing strength and deformation features of the rock sample and a corresponding filler; (6) marking the filler having poor consistency of strength and deformation corresponding to the rock sample, and re-selecting or adjusting the material proportions; and (7) repeating steps (1)-(6) until all samples have high consistency with corresponding rock strength and deformation.
Preferably, the temperature sensing optical cable in step S4 is a high-strength metal wik&500328 temperature sensing optical cable, the metal-based cord-like optical cable includes a bare fiber, caulk, a seamless steel tube, a second layer of metal wires, a first layer of metal wires and a sheath, the bare fiber is sequentially surrounded by the caulk, the seamless steel tube, the second layer of metal wires and the first layer of metal wires, and the outer circle of the metal wires is covered with the sheath.
Preferably, in step S4, the temperature sensing optical cable is implanted into the drilled hole via a stainless steel guiding cone and an implanting depth is determined via a drill rod and an optical cable length scale and the specific steps are as follows: A. determining an optical cable position according to the scale on the optical cable, dividing all end optical cables into two strands via a PA tie and water-borne epoxy resin and symmetrically fixing the two strands on the guiding cone; B. sweeping the hole before burying, removing mud on a hole wall of the drilled hole via a steel brush, and then completely cleaning the drilled hole with clear water; C. inserting a thin part on an upper portion of the guiding cone into the drill rod, and connecting the drill rod and the cone through left-handed threads; D. placing the drill rod and the guiding cone into the drilled hole, and starting to lowering the optical cable, where the optical cable is tensioned in the lowering process to prevent the drill rod and the guiding cone from being separated; a rolling type lowering method is adopted, the optical cable needs to be vertical at a hole opening position, and in the lowering process, it needs to guarantee that the optical cable does not rotate or twist, and a lowering speed is uniform without being too fast or too slow; and E. determining a lowering position via a lowering position of the drill rod and the optical cable length scale, tensioning the optical cable towards a periphery of the drilled hole after reaching the position, and rotating the drill rod to separate the cone from the drill rod under the action of gravity of the guiding cone.
Preferably, the rolling type lowering method is adopted in step D, the optical cable needs to be vertical at the hole opening position, and in the lowering process, it needs to guarantee that the optical cable does not rotate or twist, and the lowering speed is kept uniform.
Preferably, positioning the position that has been filled by utilizing the change of the temperature sensing optical cable in step S6 includes the specific operations: first, obtaining drilling depths corresponding to different positions of the optical cable according to scales on the temperature sensing optical cable, and then heating the temperature sensing optical cable through a self-heating device of the temperature sensing optical cable, where a temperature of the temperature sensing optical cable is gradually lowered after heating is stopped, but sinté/500328 a heat dissipation speed of the position of a filled area in the drilled hole is higher than that of the position of a non-filled area, the temperature of the temperature sensing optical cable has an obvious difference within a certain time range after heating is stopped, and the difference has a tendency of increasing first and then decreasing with time, and finally tends to be a formation temperature at this depth, so that the position that has been filled is determined. The present invention has the following beneficial effects: The filling material proportions of the different formation-complexes are obtained via the crossover trial method, so that the density, strength and deformation parameters of the proportioned materials are matched with the corresponding rock formations; and the temperature sensing optical cable is heated in a copper screen to determine the grouting position, the specific heat capacity and the heat exchange coefficient of water and the fillers in the hole have large differences, resulting that the temperature sensing optical cable has remarkable temperature differences in the fillers and the water, this difference and position change can be measured through a temperature tester, and therefore the position of grouting materials is determined. The drilled hole is subjected to stratified grouting backfilling according to lithology and mechanical parameters, which is beneficial to guaranteeing the consistency between the optical cable and surrounding rock deformation, so that the problem of large monitoring errors caused by indiscriminate grouting filling of unified materials is solved.
BRIEF DESCRIPTION OF THE DRAWINGS The following further describes the present invention with reference to the accompanying drawings. Fig. 1 is a rock formation position map in an embodiment of the present invention; Fig. 2 is a comparison diagram of filling material samples and corresponding rock strength of an embodiment of the present invention; Fig. 3 is a sectional view of a temperature sensing optical cable of the present invention; and Fig. 4 is a temperature-depth graph obtained in 5 minutes after a temperature sensing optical cable is heated to 50°C after grouting of the 13" group of rock formations is finally completed in an embodiment of the present invention.
DETAILED DESCRIPTION The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some bE500328 rather than all of the embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
5 In the description of the present invention, it should be understood that orientation or position relationships indicated by the terms such as "opening hole", "up", "down", "thickness", "top", "middle", "length", "inside", and "around" are merely to facilitate the description of the present invention and simplify the description, rather than indicating or implying that the mentioned assembly or component needs to have a particular orientation or needs to be constructed and operated in a particular orientation. Therefore, such terms should not be construed as limiting of the present disclosure.
A drilled hole stratified filling method specifically includes the following steps: S1. Geological formation-complexes are divided according to geological drilling lithology, and a rock formation position map is drawn, as shown in Fig. 1.
S2. Overlying bed rock is divided into five groups according to rock core lithology and mechanical properties of a drilled hole at a monitoring position, namely weathered bed rock, argillaceous sandstone, siltstone, post stone and grit stone respectively, where uniaxial compressive strength is 20.01 MPa, 24.88 MPa, 35.22 MPa, 40.10 MPa and 28.54 MPa respectively, and specific physical and mechanical properties are as shown in Table 1.
Table 1 Physical and Mechanical Properties of Overlying Rock-soil Samples of Monitoring Area Lithology E (GPa) Rc (MPa) Rm (MPa) compressive ; ; strain (ue) strain (ue) Sand layer 0.21 0.22 0.02 -1247.62 95.24 Soil layer 0.50 0.50 0.05 -1500.10 100.01 Weathered 451 20.01 1.01 -7436.81 223.95 bed rock Argillaceous 8.67 24.88 1.66 -4109.67 191.46 sandstone Siltstone 12.98 35.22 2.35 -4273 41 181.05 Post stone 13.26 40.10 2.67 -4024.13 201.36 Grit stone 10.44 28.54 2.38 -3633.72 227.97 S3. Portland cement, dried river sand with an average particle size of 0.43 mm, rubbles with an average particle size of 18.25 mm, water and a naphthalene sulfonate based water reducer (MJ-II) are mixed in a certain proportion to make 5 corresponding fillers which are used for grouting backfilling of a drilled hole subsequently, and to obtain a grouting filler with strength and deformation features being close to surrounding rock, a series of proportioning tests are performed, where the specific flow is as follows: LU500328 (1) Mixture materials are selected, and proportioned via weight proportions. (2) Hole sealing cement paste is made and cured with curing time of 20 days or above. (3) A cylinder with a diameter of 50 mm and a height of 100 mm and a cylinder with a diameter of 50 mm and a height of 25 mm are made as rock core and filler samples. (4) A non-lateral-confinement uniaxial stress-strain test and a uniaxial shear strength test are performed on five groups of rock samples and filler samples. (5) Strength and deformation features of the rock samples and the corresponding fillers are comparatively analyzed. (6) The fillers having poor consistency of strength and deformation corresponding to the rock samples are marked, and material proportions are re-selected or adjusted. (7) Steps (1)-(6) are repeated until all samples have high consistency with corresponding rock strength and deformation, as shown in Fig. 2. After multiple times of repeated proportioning and testing, a filler material proportioning solution corresponding to the five groups of rock is finally determined, and selection and proportions of specific materials are as shown in Table 2. Table 2 Composition and Proportion of Mixed Filling Materials No. compressive river sand Rubbles Water reducer strength #32.5 #42.5 (9) (g) (g) (8) (MPa) A 20+2.5 168.92 0 680.74 0 150.34 0 B' 2542.5 150.60 0 254.52 515.06 79.82 0 C' 30+2.5 137.36 0 315.94 473.90 71.43 1.37 D' 35+2.5 0 137.55 279.23 519.94 61.90 1.38 F' 40+2.5 0 152.91 272.17 513.76 59.63 1.53 S4. À temperature sensing optical cable 1s implanted into the drilled hole via a stainless steel guiding cone, where the temperature sensing optical cable 1s a high-strength metal wire temperature sensing optical cable, as shown in Fig. 3, the metal-based cord-like optical cable includes a bare fiber, caulk, a seamless steel tube, a second layer of metal wires, a first layer of metal wires and a sheath, the bare fiber 1s sequentially surrounded by the caulk, the seamless steel tube, the second layer of metal wires and the first layer of metal wires, the outer circle of the metal wires is covered with the sheath, the implanting depth is determined via a drill rod and an optical cable length scale, and a burying step and conditions are as follows: A.
An optical cable position is determined according to the scale on the optical cable, all end optical cables are divided into two strands via a PA tie and water-borne epoxy resin, and the two strands are symmetrically fixed on the guiding cone, here, symmetry of the optical cable needs to be considered to prevent the aiding cone from inclining in the burying procedsl500328 B. Hole is swept before burying, mud on a hole wall of the drilled hole is removed via a steel brush, and then the drilled hole is completely cleaned with clear water; and on the one hand, the step is to guarantee that the optical cable is smoothly lowered, and on the other hand, grouting slurry directly makes contact with surrounding rock to guarantee that no weak glide plane exists between the slurry and the surrounding rock.
C. A thin part on an upper portion of the guiding cone is inserted into the drill rod, and the drill rod and the cone are connected through left-handed threads.
D. The drill rod and the guiding cone are placed into the drilled hole, and the optical cable starts to be lowered, where the optical cable needs to be tensioned in the lowering process to prevent the drill rod and the guiding cone from being separated; a rolling type lowering method is adopted, the phenomenon of intertwining of the optical cable can be reduced to the maximum extent, the optical cable needs to be vertical at a hole opening position, and in the lowering process, it needs to guarantee that the optical cable does not rotate or twist, and the lowering speed is uniform without being too fast or too slow.
E. A lowering position is determined via a lowering position of the drill rod and the optical cable length scale, the optical cable is tensioned towards the periphery of the drilled hole after the position is reached, and the drill rod is rotated to separate the cone from the drill rod under the action of gravity of the guiding cone.
SS. Injection volumes required by the different formation-complexes are predicted according to a diameter of the drilled hole and a total thickness of the different formation- complexes and according to a volumetric method, and preparation is made according to a volume of 1.5 times considering grout leakage, hole wall damage, hole wall rock absorption and other factors, where a calculating formula is as follows: V, = (Ly x H,x1.5 2 ; in the formula, Vi is an injection volume of the i formation-complex, ¢ is a hole diameter of the drilled hole, and Hi is a total thickness of the i! formation-complex.
For example, the diameter of a drilled hole at the position of the 13“ formation-complex is 91 mm, the thickness of the formation-complex 1s 30.75 m, and through calculation, corresponding filling materials required to be prepared are x*(91/2*10*)?*30.75*1.5=0.30 m’.
S6. A position that has been filled is accurately positioned by utilizing the change of the temperature sensing optical cable according to a difference in heat transmission of a filled area and a non-filled area, so as to achieve the purpose of accurate stratified filling in combination with the rock formation position map. LU500328 For example, according to the rock formation position map, it can be known that the top and bottom burial depths of the 13" formation-complex are 212.25 m and 243 m respectively, drilling depths corresponding to different positions of the optical cable can be obtained according to scales on the temperature sensing optical cable, and then the temperature sensing optical cable is heated (maximally heated to 60°C) through a self-heating device of the temperature sensing optical cable. The temperature of the temperature sensing optical cable is gradually lowered after heating is stopped, but since the heat dissipation speed of the position of a filled area in the drilled hole is higher than that of the position of a non-filled area, the temperature of the temperature sensing optical cable has an obvious difference within a certain time range after heating is stopped, and the difference has a tendency of increasing first and then decreasing with time, and finally tends to be a formation temperature at this depth. Fig. 4 is a temperature-depth graph obtained in 5 minutes after the temperature sensing optical cable is heated to 50°C after grouting of the 13“ group of rock formations is finally completed, and the graph represents that the grouting position is matched with the position of a top interface of the 13 group of rock formations.
In the description of this specification, the description of reference terms such as "one embodiment", "example", or "specific example" means that specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic descriptions of the foregoing terms do not necessarily directed at a same embodiment or example. In addition, the described specific features, structures, materials, or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.
The foregoing shows and describes the basic principle and main features of the present invention and advantages of the present invention. A person skilled in the art should understand that the present invention is not limited by the foregoing embodiments. The foregoing embodiments and the descriptions of the specification merely explain principals of the present invention. Various variations and improvements of the present invention can be made without departing from the spirit and scope of the present invention, and the variations and improvements fall within the protection scope of the present invention.
Claims (7)
1. À drilled hole stratified filling method, specifically comprising the following steps: S1. dividing geological formation-complexes according to geological drilling lithology, and drawing a rock formation position map; S2. testing density, strength and deformation parameters of different formation- complexes; S3. selecting filling materials, and obtaining material proportions of the different formation-complexes via a crossover trial method to make a matching degree of density, strength and deformation parameters of the proportioned materials meet monitoring requirements; S4. vertically implanting a temperature sensing optical cable into a drilled hole; SS. predicting injection volumes required by the different formation-complexes according to a diameter of the drilled hole and a total thickness of the different formation- complexes and according to a volumetric method, and preparing according to a volume of 1.5 times considering grout leakage, hole wall damage, hole wall rock absorption and other factors, wherein a calculating formula is as follows: V = as x H, x1.5 2 > in the formula, Vi is an injection volume of the i! formation-complex, ¢ is a hole diameter of the drilled hole, and Hi is a total thickness of the i formation-complex; and S6. accurately positioning a position that has been filled by utilizing a change of the temperature sensing optical cable according to a difference in heat transmission of a filled area and a non-filled area, so as to achieve the purpose of accurate stratified filling in combination with the rock formation position map.
2. The drilled hole stratified filling method according to claim 1, wherein the filling materials in step S3 comprise portland cement, dried river sand, rubbles, a naphthalene sulfonate based water reducer and water, a particle size of the dried river sand is 0.3-0.5 mm, and a particle size of the rubbles is 15-20 mm.
3. The drilled hole stratified filling method according to claim 1, wherein proportioning of the filling materials in step S3 comprises the following steps: (1) selecting mixture materials, and proportioning via weight proportions; (2) making and curing hole sealing cement paste with curing time of 20 days or above; (3) making a cylinder with a diameter of 50 mm and a height of 100 mm and a cylinder with a diameter of 50 mm and a height of 25 mm as rock core and filler samples; LU500328 (4) performing a non-lateral-confinement uniaxial stress-strain test and a uniaxial shear strength test on a rock sample and the filler sample; (5) comparatively analyzing strength and deformation features of the rock sample and a corresponding filler; (6) marking the filler having poor consistency of strength and deformation corresponding to the rock sample, and re-selecting or adjusting the material proportions; and (7) repeating steps (1)-(6) until all samples have high consistency with corresponding rock strength and deformation.
4. The drilled hole stratified filling method according to claim 1, wherein the temperature sensing optical cable in step S4 is a high-strength metal wire temperature sensing optical cable, the metal-based cord-like optical cable comprises a bare fiber, caulk, a seamless steel tube, a second layer of metal wires, a first layer of metal wires and a sheath, the bare fiber is sequentially surrounded by the caulk, the seamless steel tube, the second layer of metal wires and the first layer of metal wires, and the outer circle of the metal wires is covered with the sheath.
5. The drilled hole stratified filling method according to claim 1, wherein in step S4, the temperature sensing optical cable is implanted into the drilled hole via a stainless steel guiding cone and an implanting depth is determined via a drill rod and an optical cable length scale, and the specific steps are as follows: A. determining an optical cable position according to the scale on the optical cable, dividing all end optical cables into two strands via a PA tie and water-borne epoxy resin and symmetrically fixing the two strands on the guiding cone; B. sweeping the hole before burying, removing mud on a hole wall of the drilled hole via asteel brush, and then completely cleaning the drilled hole with clear water; C. inserting a thin part on an upper portion of the guiding cone into the drill rod, and connecting the drill rod and the cone through left-handed threads; D. placing the drill rod and the guiding cone into the drilled hole, and starting to lowering the optical cable, wherein the optical cable is tensioned in the lowering process to prevent the drill rod and the guiding cone from being separated; a rolling type lowering method is adopted, the optical cable needs to be vertical at a hole opening position, and in the lowering process, it needs to guarantee that the optical cable does not rotate or twist, and a lowering speed is uniform without being too fast or too slow; and E. determining a lowering position via a lowering position of the drill rod and the optical cable length scale, tensioning the optical cable towards a periphery of the drilled hole aftel/500328 reaching the position, and rotating the drill rod to separate the cone from the drill rod under the action of gravity of the guiding cone.
6. The drilled hole stratified filling method according to claim 5, wherein the rolling type lowering method is adopted in step D, the optical cable needs to be vertical at the hole opening position, and in the lowering process, it needs to guarantee that the optical cable does not rotate or twist, and the lowering speed is kept uniform.
7. The drilled hole stratified filling method according to claim 1, wherein positioning the position that has been filled by utilizing the change of the temperature sensing optical cable in step S6 comprises the specific operations: first, obtaining drilling depths corresponding to different positions of the optical cable according to scales on the temperature sensing optical cable, and then heating the temperature sensing optical cable through a self-heating device of the temperature sensing optical cable, wherein a temperature of the temperature sensing optical cable is gradually lowered after heating is stopped, but since a heat dissipation speed of the position of a filled area in the drilled hole is higher than that of the position of a non-filled area, the temperature of the temperature sensing optical cable has an obvious difference within a certain time range after heating is stopped, and the difference has a tendency of increasing first and then decreasing with time, and finally tends to be a formation temperature at this depth, so that the position that has been filled is determined.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251360.0A CN112412394B (en) | 2020-11-11 | 2020-11-11 | Drilling layered filling method |
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| LU500328B1 true LU500328B1 (en) | 2022-01-07 |
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| LU500328A LU500328B1 (en) | 2020-11-11 | 2021-06-24 | Drilled hole stratified filling method |
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| CN (1) | CN112412394B (en) |
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| CN113532990B (en) * | 2021-07-15 | 2023-11-14 | 西南石油大学 | Preparation method of compact sandstone oil displacement core with argillaceous interlayer |
| CN114198142B (en) * | 2021-11-22 | 2023-12-05 | 中铁第四勘察设计院集团有限公司 | Karst collapse treatment method |
| CN114233380B (en) * | 2021-12-27 | 2023-12-05 | 徐州格润矿山技术开发有限公司 | Method for isolating, grouting and filling overlying strata by using coal-based solid wastes |
| CN115182325B (en) * | 2022-09-14 | 2023-03-10 | 中国煤炭地质总局勘查研究总院 | Ecological restoration method for perennial frozen soil in plateau alpine region |
| CN115979210B (en) * | 2022-12-08 | 2023-11-28 | 徐州中矿岩土技术股份有限公司 | Monitoring method for stability evaluation after goaf treatment |
| CN118548012A (en) * | 2024-06-06 | 2024-08-27 | 中国矿业大学(北京) | Method for repairing aquifer by sectional directional grouting after mining area mining |
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| JP2838348B2 (en) * | 1993-06-08 | 1998-12-16 | 佐藤工業株式会社 | Continuous backfilling method in shield excavation |
| CN101230570A (en) * | 2008-02-20 | 2008-07-30 | 山东省交通厅公路局 | Layered multitime pressure regulating pulp conditioning casting method |
| CN103438820A (en) * | 2013-09-05 | 2013-12-11 | 南京大学 | Borehole profile rock and soil mass layered deformation optical fiber measuring method |
| CN106523014A (en) * | 2016-11-28 | 2017-03-22 | 金诚信矿业管理股份有限公司 | Ventilation system for underhand-cutting-and-filling-method high-temperature stope and method |
| CN110130883A (en) * | 2019-04-01 | 2019-08-16 | 中国矿业大学 | The determination method and device of formation parameters |
| CN110763569A (en) * | 2019-11-28 | 2020-02-07 | 广西科技大学 | Geogrid creep test device and method considering soil mass constraint conditions |
| CN111456723B (en) * | 2020-04-08 | 2021-07-09 | 中国矿业大学 | One-hole dual-purpose method for overburden three-zone detection and rock stratum movement monitoring |
| CN111599137B (en) * | 2020-06-12 | 2023-07-25 | 安徽理工大学 | Underground engineering surrounding rock stability multi-physical-field monitoring and early warning system and method |
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| CN112412394B (en) | 2022-12-06 |
| CN112412394A (en) | 2021-02-26 |
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