CN104763466A - Method for detecting active diffusion radius of covered rock separation grouting filling slurry - Google Patents
Method for detecting active diffusion radius of covered rock separation grouting filling slurry Download PDFInfo
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- CN104763466A CN104763466A CN201510122273.8A CN201510122273A CN104763466A CN 104763466 A CN104763466 A CN 104763466A CN 201510122273 A CN201510122273 A CN 201510122273A CN 104763466 A CN104763466 A CN 104763466A
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- inlet well
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- aperture
- grouting
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- 239000002002 slurry Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title abstract description 19
- 238000009792 diffusion process Methods 0.000 title abstract 5
- 239000011435 rock Substances 0.000 title abstract 3
- 238000000926 separation method Methods 0.000 title abstract 2
- 239000003245 coal Substances 0.000 claims abstract description 12
- 230000010339 dilation Effects 0.000 claims description 41
- 238000004519 manufacturing process Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 12
- 238000002955 isolation Methods 0.000 claims description 11
- 238000007569 slipcasting Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/08—Filling-up hydraulically or pneumatically
-
- 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
- E21B47/04—Measuring depth or liquid level
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/008—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Geophysics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a method for detecting active diffusion radius of a covered rock separation grouting filling slurry. A first group of grouting holes and a second group of grouting holes having the distance of L1 away from the first group of grouting holes are formed in the ground surface above a coal face vertically and downwards; the distance between a main grouting hole and an auxiliary grouting hole is L2; after the covered rock is filled by grouting via the grouting holes, whether the slurry flows out of the orifice valves of the auxiliary and main grouting holes of the second group of grouting holes is observed, and the active diffusion radius of a mining region is determined according to the slurry outflow condition. The holes for detecting the active diffusion radius of the slurry are all the grouting holes; the control effect on the subsequent grouting filling of the holes and surface subsidence is not affected and the problem of failure in detecting the active diffusion radius of the mining region by use of the grouting holes in traditional grouting filling projects is solved.
Description
Technical field
The present invention relates to the detection method of the effective dilation angle of a kind of colliery overburden strata grouting filling mining slurry, especially a kind of mining overburden isolation grouting filling that is applicable to exploits the effective dilation angle detection method of slurry that building presses down coal.
Background technology
Along with development that is economic and society, tradition moves that the cost of mining in village is more and more higher and to implement difficulty increasing, and thus Bu Qian village mines that the active demand, particularly recovery ratio that have become coal enterprise is high, cost is low, disturbs little technology with mining.Overburden strata grouting filling technique is just possessing these technical advantages, as patent ZL201210164929.9 discloses a kind of mining overburden subregion isolation grouting filling coal-mining method, obtains and applies, and achieve remarkable effect in mining in Bu Qian village.When applying overburden strata grouting filling technique, it is the important leverage effectively controlling subsidence that rational inlet well is arranged, and one of its key issue is the determination of number of holing above coal-face, if boring arranges that number is too much, not only increase grouting filling engineering cost, and bring extreme difficulty to engineering management and control etc.; If boring arranges that number is too small, then the absciss layer space above coal-face in overlying strata can not be made to obtain abundant filling, thus affect surface subsidence control effect, likely cannot available protecting above ground structure.Number of holing above coal-face obviously depends on the effective dilation angle of the slurry of production zone, and namely inlet well position and front slurry pressure equal the air line distance between the ground point of the slurry column pressure of 1 hole depth.Thus, the effective dilation angle of slurry detecting production zone exactly plays in very important function, particularly project implementing process and is not disturbing the effective dilation angle of the slurry detecting production zone under grouting filling condition in overburden strata grouting filling engineering.
The patent No. is the diplopore staggered floor boring method for arranging that ZL201210164930.1 discloses a kind of mining overburden isolation grouting filling, has been specifically related to the adjacent spacing of wells above coal-face and has determined; For determining adjacent 2 groups of spacings of wells, the dilation angle setting production zone slurries in patent ZL201210164930.1 is 100 ~ 200m, but and the detection method of the effective dilation angle of slurry of production zone under unexposed Different Strata condition.Due to different coal field (the different exploiting fields of even same mine), usually geology condition difference is very big, overlying strata lithology from weak, hard, hard all not identical, the dilation angle of production zone slurries is also unequal.Thus, the detection method forming the effective dilation angle of overlying strata isolation grouting filling slurry is very necessary, to contribute to determining the rational inlet well spacing of different production zone in grouting filling engineering, improve grouting filling surface subsidence control effect, prevent from causing project failure because the spacing of wells is unreasonable in grouting filling engineering.
Summary of the invention
Technical problem: the object of the invention is to overcome prior art weak point, provides the detection method of the effective dilation angle of strong, the effective overlying strata isolation grouting filling slurry of a kind of reliability.
Technical scheme: the detection method of the effective dilation angle of overlying strata isolation grouting filling slurry of the present invention, comprises the steps:
(1) inlet well is arranged on the earth's surface above coal-face vertically downward, on earth's surface apart from inlet well distance for constructing to direction, coal seam auxiliary inlet well L1 position, be construct main inlet well in L2 position apart from auxiliary inlet well level interval;
(2) implement overburden strata grouting filling to inlet well, during inlet well slip casting, along with the exploitation of coal-face, whether the aperture observing main inlet well and auxiliary inlet well has slurries to flow out, and detects the effective dilation angle of slurry of production zone with this;
(3) according to the aperture slurry stream artificial situation of main inlet well and auxiliary inlet well, the effective dilation angle detected value of the slurry of production zone is determined:
Flow out if slurries are not observed in auxiliary inlet well aperture, then show that the effective dilation angle of the slurry of production zone is less than length L1;
Flow out if slurries are observed in auxiliary inlet well aperture, main inlet well aperture is not observed slurries and is flowed out, then show that the effective dilation angle of the slurry of production zone is between distance L1 and distance L1+ level interval L2;
Flow out if slurries are all observed in auxiliary inlet well and main inlet well aperture, then show that the effective dilation angle of the slurry of production zone is greater than distance L1+ level interval L2.
The height of the whole pitch-row roof of described main inlet well and auxiliary inlet well is less than or equal to the whole pitch-row roof height of inlet well.
The distance L1 of described auxiliary inlet well and inlet well is 80 ~ 200m; The level interval L2 of described main inlet well and auxiliary inlet well is 30 ~ 50m.
Beneficial effect: owing to have employed technique scheme, the present invention utilizes inlet well to detect effective dilation angle of slurry, do not affect the follow-up grouting filling of boring and surface subsidence control effect, solve in the mining overburden grouting filling engineering of traditional colliery the problem that inlet well cannot be utilized in slip casting process to detect the effective dilation angle of slurry of production zone.The beneficial effect of this detection method is also; by the effective dilation angle of the slurry of the production zone detected; validity can be carried out to the follow-up inlet well plan-position of design to check and suitably adjust; thus improve the validity of grouting filling; guarantee to reach effective surface subsidence control effect, thus protection ground building safety.
Accompanying drawing explanation
Fig. 1 is inlet well layout schematic diagram of the present invention;
Fig. 2 is that inlet well section of the present invention arranges schematic diagram.
In figure: 1-inlet well; The auxiliary inlet well of 2-; The main inlet well of 3-; 4-earth's surface; 5-coal-face.
Detailed description of the invention
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
The detection method of the effective dilation angle of overlying strata isolation grouting filling slurry of the present invention, concrete steps are as follows:
(1) conveniently hole method for arranging, an inlet well 1 is arranged vertically downward in the earth's surface 4 above coal-face 5, and the whole hole of inlet well 1 and coal seam spacing are 15 ~ 40 times of mining thickness.On earth's surface 4 apart from inlet well 1 apart from auxiliary inlet well 2 of constructing to direction, coal seam for L1 position, be construct main inlet well 3 in L2 position apart from auxiliary inlet well 2 level interval; Described auxiliary inlet well 2 is 80 ~ 200m with the distance L1 of inlet well 1, and main inlet well 3 is 30 ~ 50m with the level interval L2 of auxiliary inlet well 2; The hole termination depth of auxiliary inlet well 2 is less than or equal to the hole termination depth of inlet well 1, and main inlet well 3 degree of depth is positioned at below auxiliary inlet well 2 hole termination depth 30 ~ 50m place;
(2) before coal-face 5 is exploited, whether conveniently technique is closed auxiliary inlet well 2, main inlet well 3 aperture and installs valve additional, and valve is in opening, have slurries to flow out to be observed by valve;
Conveniently coal winning technology exploitation coal-face 5, when exploiting to during apart from inlet well 1 spacing 10 ~ 30m, conveniently grouting filling technique implements pulverized fuel ash slurry filling to inlet well 1;
Whether, after inlet well 1 starts grouting filling, start to carry out routine observation to auxiliary inlet well 2 aperture valve, have slurries to flow out to observe, the observation cycle is every day 1 ~ 2 time; Along with coal-face 5 is exploited, if observe auxiliary inlet well 2 aperture valve when having slurries to flow out, close aperture valve; If along with coal-face 5 is exploited, still cannot observe aperture valve when coal-face 5 is 30m away from the distance of auxiliary inlet well 2 when having slurries to flow out, close auxiliary inlet well 2 aperture valve; After the valve closing of auxiliary inlet well 2 aperture, start to carry out routine observation to main inlet well 3 aperture valve slurry stream artificial situation according to same observational technique; When coal-face 5 is 30m away from the distance of main inlet well 3, whole observation process terminates;
(3) according to the aperture slurry stream artificial situation of main inlet well 3 and auxiliary inlet well 2, the effective dilation angle detected value of the slurry of production zone is determined:
Flow out if slurries are not observed in auxiliary inlet well 2 aperture, then show that the effective dilation angle of the slurry of production zone is less than length L1;
Flow out if slurries are observed in auxiliary inlet well 2 aperture, main inlet well 3 aperture is not observed slurries and is flowed out, then show that the effective dilation angle of the slurry of production zone is between distance L1 and distance L1+ level interval L2;
Flow out if slurries are all observed in auxiliary inlet well 2 and main inlet well 3 aperture, then show that the effective dilation angle of the slurry of production zone is greater than distance L1+ level interval L2.
Embodiment 1, for certain work plane:
1, surface grout injection boring is arranged.
A, in the middle part of coal-face 5 apart from the earth's surface 4 of cutting a 60m to direction, coal seam construction inlet well 1, only comprise 1 boring in group, its hole termination depth is positioned at 40 times of mining height positions, i.e. 120m above coal seam.
The distance of b, setting the 2nd group of inlet well and inlet well 1 is L1, sets main inlet well 3, auxiliary inlet well 2 level interval is L2;
C, on earth's surface 4 apart from inlet well 1 for constructing to direction, coal seam auxiliary inlet well 2 at 100m place, be that 50m place constructs main inlet well 3 with auxiliary inlet well 2 level interval on earth's surface 4, hole termination depth is positioned at below the auxiliary whole hole of inlet well 2 30m;
By auxiliary inlet well 2, main inlet well 3 orifice sealing and reserved valve.
2, auxiliary, main inlet well aperture slurry stream artificial situation is observed.
Grouting filling is implemented to inlet well 1, conveniently production practice exploitation coal-face 5, exploit to when being 20m position apart from inlet well 1 until coal-face 5, conveniently grouting process injects pulverized fuel ash slurry to inlet well, keeps the grouting filling of coal-face 5 exploitation and inlet well 1;
Observe auxiliary inlet well 2, main inlet well 3 aperture valve slurry stream artificial situation:
After inlet well 1 starts grouting filling, whether there are slurries to flow out to auxiliary inlet well 2 aperture valve and carry out the routine observation of 1 time every day;
Along with coal-face 5 is exploited, if observe auxiliary inlet well 2 aperture valve when having slurries to flow out, close auxiliary inlet well 2 aperture valve; If when coal-face 5 has slurries to flow out away from auxiliary inlet well 2 for still observing aperture valve during 30m, close auxiliary inlet well 2 aperture valve;
After the valve closing of auxiliary inlet well 2 aperture, start to carry out 1 routine observation every day to main inlet well 3 aperture valve slurry stream artificial situation according to same observational technique;
When coal-face 5 is 30m away from the distance of main inlet well 3, whole observation process terminates.
3, the effective dilation angle value of slurry of production zone is detected.After whole observation process terminates, draw the effective dilation angle detected value of the slurry of production zone in accordance with the following methods:
Flow out if slurries are not observed in auxiliary inlet well 2 aperture, then the effective dilation angle of the slurry of production zone is less than 100m;
If slurries outflow is observed in auxiliary inlet well 2 aperture and slurries outflow is not observed in main inlet well 3 aperture, then the effective dilation angle of the slurry of production zone is between 100m and 150m;
Flow out if auxiliary inlet well 2, main inlet well 3 aperture all observe slurries, then the effective dilation angle of the slurry of production zone is greater than 150m.
4, the follow-up inlet well plan-position of check or adjusted design
According to detecting the effective dilation angle of coal-face region slurry drawn, the follow-up inlet well plan-position of check or adjusted design:
If the follow-up inlet well spacing of design is greater than the effective dilation angle of the slurry detected; within then design load should being decreased to the effective dilation angle of slurry; thus improve the validity of grouting filling, guarantee to reach effective surface subsidence control effect, thus protection ground building safety.
Claims (3)
1. a detection method for the effective dilation angle of overlying strata isolation grouting filling slurry, is characterized in that comprising the steps:
(1) inlet well (1) is arranged vertically downward from the earth's surface (4) of coal-face (5) top, earth's surface (4) apart from inlet well (1) distance for constructing to direction, coal seam auxiliary inlet well (2) L1 position, be construct main inlet well (3) in L2 position apart from auxiliary inlet well (2) level interval;
(2) overburden strata grouting filling is implemented to inlet well (1), during inlet well (1) slip casting, along with the exploitation of coal-face (5), whether the aperture observing main inlet well (3) and auxiliary inlet well (2) has slurries to flow out, and detects the effective dilation angle of slurry of production zone with this;
(3) according to the aperture slurry stream artificial situation of main inlet well (3) and auxiliary inlet well (2), the effective dilation angle detected value of the slurry of production zone is determined:
Flow out if slurries are not observed in auxiliary inlet well (2) aperture, then show that the effective dilation angle of the slurry of production zone is less than length L1;
Flow out if slurries are observed in auxiliary inlet well (2) aperture, main inlet well (3) aperture is not observed slurries and is flowed out, then show that the effective dilation angle of the slurry of production zone is between distance L1 and distance L1+ level interval L2;
Flow out if slurries are all observed in auxiliary inlet well (2) and main inlet well (3) aperture, then show that the effective dilation angle of the slurry of production zone is greater than distance L1+ level interval L2.
2. the detection method of the effective dilation angle of overlying strata isolation grouting filling slurry according to claim 1, is characterized in that: the height of the whole pitch-row roof of described main inlet well (3) and auxiliary inlet well (2) is less than or equal to the whole pitch-row roof height of inlet well (1).
3. the detection method of the effective dilation angle of overlying strata isolation grouting filling slurry according to claim 1, is characterized in that: described auxiliary inlet well (2) is 80 ~ 200m with the distance L1 of inlet well (1); Described main inlet well (3) is 30 ~ 50m with the level interval L2 of auxiliary inlet well (2).
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869934A (en) * | 2017-04-06 | 2017-06-20 | 安徽理工大学 | A kind of slip casting recovery method suitable for inclined seam |
| CN109989785A (en) * | 2019-04-04 | 2019-07-09 | 中勘资源勘探科技股份有限公司 | A kind of overlying strata isolation grouting filling intelligence grouting system |
| CN110017155A (en) * | 2019-05-23 | 2019-07-16 | 合肥工业大学 | A kind of coal working face top plate rich water gravel layer grouting and reinforcing erection water-proof method |
| CN110043312A (en) * | 2019-04-04 | 2019-07-23 | 中勘资源勘探科技股份有限公司 | A kind of control method of grouting filling ground settlement range |
| CN110107348A (en) * | 2019-04-02 | 2019-08-09 | 中勘资源勘探科技股份有限公司 | A kind of underground break-though roadways ground blocking technology |
| CN115356238A (en) * | 2022-10-20 | 2022-11-18 | 四川藏区高速公路有限责任公司 | Grouting diffusion radius in-situ measuring device for fractured rock mass |
Families Citing this family (1)
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| CN106555607B (en) * | 2016-12-02 | 2019-02-22 | 淮北矿业（集团）有限责任公司 | A kind of old goaf grouting filling control earth's surface residual settlement method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106869934A (en) * | 2017-04-06 | 2017-06-20 | 安徽理工大学 | A kind of slip casting recovery method suitable for inclined seam |
| CN106869934B (en) * | 2017-04-06 | 2018-08-31 | 安徽理工大学 | A kind of slip casting recovery method suitable for inclined seam |
| CN110107348A (en) * | 2019-04-02 | 2019-08-09 | 中勘资源勘探科技股份有限公司 | A kind of underground break-though roadways ground blocking technology |
| CN109989785A (en) * | 2019-04-04 | 2019-07-09 | 中勘资源勘探科技股份有限公司 | A kind of overlying strata isolation grouting filling intelligence grouting system |
| CN110043312A (en) * | 2019-04-04 | 2019-07-23 | 中勘资源勘探科技股份有限公司 | A kind of control method of grouting filling ground settlement range |
| CN110017155A (en) * | 2019-05-23 | 2019-07-16 | 合肥工业大学 | A kind of coal working face top plate rich water gravel layer grouting and reinforcing erection water-proof method |
| CN115356238A (en) * | 2022-10-20 | 2022-11-18 | 四川藏区高速公路有限责任公司 | Grouting diffusion radius in-situ measuring device for fractured rock mass |
| CN115356238B (en) * | 2022-10-20 | 2023-02-07 | 四川藏区高速公路有限责任公司 | Grouting diffusion radius in-situ measuring device for fractured rock mass |
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