AU2018360897A1 - Intelligent grouting system and grouting method for complex geological region - Google Patents
Intelligent grouting system and grouting method for complex geological region Download PDFInfo
- Publication number
- AU2018360897A1 AU2018360897A1 AU2018360897A AU2018360897A AU2018360897A1 AU 2018360897 A1 AU2018360897 A1 AU 2018360897A1 AU 2018360897 A AU2018360897 A AU 2018360897A AU 2018360897 A AU2018360897 A AU 2018360897A AU 2018360897 A1 AU2018360897 A1 AU 2018360897A1
- Authority
- AU
- Australia
- Prior art keywords
- grouting
- grout
- pressure
- thick
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 33
- 239000011440 grout Substances 0.000 claims description 196
- 230000035699 permeability Effects 0.000 claims description 47
- 230000001105 regulatory effect Effects 0.000 claims description 33
- 238000003756 stirring Methods 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 230000001276 controlling effect Effects 0.000 claims description 14
- 238000004364 calculation method Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 5
- 238000013480 data collection Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
INTELLIGENT GROUTING SYSTEM AND GROUTING METHOD FOR COMPLEX GEOLOGICAL REGION
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to the field of roadway supporting, and specifically, relates to an intelligent grouting system and the method there of.
Description of Related Art
The grouting technology is an engineering technology of strong practicability and wide application, and is also widely used in the coal mine roadway supporting field. Broken rock mass can be cemented and reinforced as an entirety by grouting and filling in fractures of surrounding rock, which improves a bearing capability of the surrounding rock, and has a significant effect for deformation control of fractured surrounding rock in a roadway.
An existing down-hole grouting technology has the following problems:
1. For grouting, a low-flow grouting pump is still mostly used to perform single-hole construction, leading to a slow construction speed and low efficiency, and resulting in a great limitation on rapid excavation and supporting for the roadway. In recent years, a porous grouting method has emerged. For example, Chinese Patent Application CN101749030A discloses a porous parallel-connected grouting method and apparatus for reinforcing weak surrounding rock in a roadway, in which a flow diversion device is used to divide a grouting pipeline into a plurality of grouting pipelines, achieving simultaneous grouting. However, such a method can be used only for grouting under a uniform geological condition, and not in an region with a complex geological condition, cannot intelligently adjust main grouting parameters of various pipelines in combination with a geological condition of each hole, and cannot monitor and feed back information in real time, thus lacking the research in intelligent control.
2. Existing grouting control is still mostly manual control, and there are many potential risks. If a grouting process cannot be controlled in time, a resource waste is easily caused, or a grouting effect meeting an expected design requirement cannot be obtained. In addition, when grouting is performed on a plurality of grouting pipelines simultaneously, and each grouting pipeline is controlled only by means of manpower, not only more manpower resources are required, but also the confusion of field management may be caused. Therefore, an intelligent control system is required for unified control.
3. A grouting procedure lacks strict criteria and supervision, and a final grouting ending pressure is uncertain and is only experientially determined by workers during construction, so that an error is great, effective control cannot be performed, and an expected grouting effect easily fails due to a mistake, resulting in rework.
Currently, coal mine downhole grouting, especially grouting in a roadway with changeable geological condition, requires a regional intelligent grouting method. The regional intelligent grouting method can automatically distinguish different geological conditions, can automatically adjust basic parameters such as a grout concentration according to the geological conditions, can monitor and feed back information in real time, and can intelligently control a final grouting ending pressure, thereby achieving the purpose of intelligent grouting in a complex geological region.
SUMMARY OF THE INVENTION
Technical Problem
To resolve the problems in the conventional grouting, the present invention provides an intelligent grouting system and the method thereof, which can achieve simultaneous grouting in a plurality of holes in a complex geological region, and also achieve intelligently controlled grouting in the complex geological region.
Technical Solution
Technical solution of the present invention: an intelligent grouting system for a complex geological region, including a thick grout storage tank, a thin grout storage tank, grouting pumps, an intelligent control system, and a plurality of grouting branches correspondingly disposed according to the number of drill holes, where the thick grout storage tank is connected to a main thick-grout grouting pipeline, the thin grout storage tank is connected to a main thin-grout grouting pipeline, and each of the main grouting pipeline is respectively provided with the grouting pumps; each grouting branches includes mixing and stirring tanks, and thick-grout grouting branch pipes, thin-grout grouting branch pipes, and mixed grouting pipes that are connected to the mixing and stirring tanks, respectively; the thick-grout grouting branch pipes and the thin-grout grouting branch pipes are respectively connected to the main thick-grout grouting pipeline and the main thin-grout grouting pipeline by means of electric three-way valves, and the thick-grout grouting branch pipes and the thin-grout grouting branch pipes are provided with flow sensors and flow regulating valves, respectively; the mixed grouting pipes are connected to grouting holes, and are provided with pressure sensors, flow sensors, and pressure regulating valves; and the flow sensors, the flow regulating valves, the pressure sensors, and the pressure regulating valves are each connected to the intelligent control system.
The thick-grout grouting pump or the thin-grout grouting pump is connected to a water tank.
For the thick-grout grouting pump or the thin-grout grouting pump, because of a flow diversion action, a large-flow high-pressure grouting pump is selected to ensure that when flow diversion is performed on a main pipeline, each branch pipeline has a sufficient grouting pressure, thereby guaranteeing the grouting quality.
A density sensor is disposed in each of the mixing and stirring tanks, and is used to transfer in real time the concentration information of a mixed grout to the intelligent control system, so as to achieve real-time monitoring and ensure that the concentration of the formulated grout meets a requirement.
The intelligent control system is composed of a permeability detection module, a grout proportioning module, a grouting control module, and a computer, where the permeability detection module, the grout proportioning module, and the grouting control module receive information fed back by data collection devices, and the computer stores and analyzes the information and controls valves on each pipelines; the permeability detection module collects information by means of the pressure sensors and the flow sensors that are mounted on the thick-grout grouting branch pipes and the thin-grout grouting branch pipes of the each grouting branches, and stores the information into the computer for related calculation and analysis; the grout proportioning module performs an analysis according to information collected by the flow sensors on the thick-grout grouting branch pipes and the thin-grout grouting branch pipes, and then controls openings of the flow regulating valves on the thickgrout grouting branch pipes and the thin-grout grouting branch pipes, such that grouts are mixed in the mixing and stirring tanks in designed flow ratios, so as to obtain expected grout concentrations; and the grouting control module collects information by means of the pressure sensors and the flow sensors that are mounted on the mixed grouting pipes of pipelines of each grouting branches, monitors in real time on grouting statuses of the each grouting holes, performs corresponding controls by means of the pressure regulating valves, and when an end criterion is met, closes the electric threeway valves of the grouting branches.
The present invention provides an intelligent grouting method for a complex geological region, including: porous permeability detection in a complex geological region, intelligent adjustment of grouting parameters, monitoring and real-time feeding back of information, and real-time control by an intelligent control system, where the method includes the following specific steps:
step (1): selecting a region in a target grouting roadway for supporting, and determining positions and sizes of grouting holes according to a design requirement;
step (2): simultaneously performing permeability detection in a plurality of holes in the region, and obtaining permeability coefficients of each grouting holes through calculation by using a formula according to data obtained by sensors;
step (3): determining optimal grout concentrations in each grouting holes based on the permeability coefficients of the each grouting holes in the region, and intelligently adjusting the grouting parameters;
step (4): monitoring, by means of sensors on pipelines of various grouting branches, grouting in the pipelines of the each grouting branches, and feeding back collected information to the intelligent control system; and step (5): controlling in real time, by the intelligent control system and according to the information fed back, grouting statuses of the each grouting branches, and ending the grouting when a final grouting ending pressure is reached.
For the permeability detection, a grouting pump connecting to a water tank pumps water in the plurality of holes in the complex geological region simultaneously, pressure sensors and flow sensors on mixed grouting pipes of the pipelines of the grouting branches obtain water injection pressures and flow rates, and the permeability coefficients of the each grouting holes are obtained through calculation by using a related formula.
For the intelligent adjustment of grouting parameters, the optimal grout concentrations for the each grouting holes is respectively determined based on the permeability coefficients of the each grouting holes, flow rates of a thick grout and a thin grout are adjusted in ratios by adjusting flow regulating valves on thick-grout grouting branch pipes and thin-grout grouting branch pipes of the each grouting branches, and the thick grout and the thin grout are mixed in mixing and stirring tanks, so as to obtain different grout concentrations, achieving respective optimal grout concentrations for the each grouting holes.
For the monitoring and real-time feeding back of information, sensors on the each grouting branches feed back in real time information of pressures and flow rates on corresponding pipelines to the intelligent control system, and feed back in real time flow rates in branch pipes, such that the intelligent control system controls grout concentrations.
The grouting method includes: respectively storing two concentrations of cement grouts into a thick grout storage tank and a thin grout storage tank; inputting, by grouting pumps, the grouts from the grout storage tanks into mixing and stirring tanks; respectively controlling, by the intelligent control system, openings of electric threeway valves on thick-grout grouting branch pipes and thin-grout grouting branch pipes of the each grouting branches corresponding to the grouting holes, so as to control concentrations of grouts entering the mixing and stirring tanks; when the grout concentrations in the mixing and stirring tanks satisfy the optimal grout concentrations corresponding to the grouting holes, controlling, by the intelligent control system, the mixing and stirring tanks to input grouts into the grouting holes, and simultaneously controlling pressure regulating valves on mixed grouting pipes to control grouting pressures; and when a final grouting ending pressure is reached in a single grouting hole, ending grouting in the hole, and once grouting in all the grouting holes in the grouting region is completed, ending grouting in the region, and entering grouting in a next region.
For the grout concentration, according to the present invention, a water-to-cement ratio of the thick grout is 2:1, and a water-to-cement ratio of the thin grout water is 0.6:1, and when the permeability coefficients of the each grouting holes are obtained by permeability detection, the optimal grout concentrations in the each grouting holes can be known according to the permeability coefficients; and required grout concentrations are obtained by mixing and proportioning the thick grout and the thin grout at different flow rates.
For the grouting pressure, when grouting is performed in a grouting hole, a grouting pressure needs to be controlled such that it is not excessively high, and in order to avoid fracturing of rock mass, a highest grouting pressure should be set, and during the grouting process, if the highest grouting pressure is reached, control should be performed in time, and a pressure regulating valve is used to reduce the pressure.
For the final grouting ending pressure, in the target grouting region, according to grouting pressures that are fed back in real time by pressure sensors on mixed grouting pipes of the grouting branches, when a grouting pressure of a particular grouting hole in the region suddenly increases, it is considered that the designed grouting hole region is fully filled with the grout, resulting in the phenomenon of the suddenly increased pressure, and at this time, the final grouting ending pressure is reached in the grouting hole, and the grouting is ended; and when the final grouting ending pressure is reached in all the grouting holes in the target region, it is considered that the final grouting ending pressure is reached in grouting in the region, and the grouting is ended in the region and is transferred to a next region.
Advantageous Effect
Beneficial effects of the present invention: (1) An intelligent grouting method for a complex geological region is provided, where permeability coefficients in various grouting holes in the region are obtained by permeability detection, optimal grout concentrations suitable respectively for the grouting holes are determined, and realtime control is performed by means of sensors and regulating valves that are mounted on pipelines, achieving an intelligent grouting effect. (2) Mixing is performed by controlling different ratios of flow rates of a thick grout and a thin grout, such that the optimal grout concentrations for the grouting holes are made, achieving an optimal grouting effect. (3) A corresponding final grouting ending pressure is proposed, where when a grouting pressure of a particular grouting hole in the region suddenly increases, it is considered that the designed grouting hole region is fully filled with the grout, and grouting in the hole is ended, and when the final grouting ending pressure is reached in all the grouting holes in the target region, grouting in the region is ended.
(4) This method achieves intelligent grouting under a complex geological condition, has a high degree of automation, and can substantially increase the roadway grouting speed, such that construction efficiency is high, and construction efficiency and quality can be guaranteed.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic structural diagram of an apparatus according to the present invention;
FIG. 2 is a flow diagram of a grouting method; and
FIG. 3 is a detailed diagram of an intelligent control system.
In the figures, 1. thick grout storage tank; 2. thin grout storage tank; 3. water tank;
4. thick-grout grouting pump; 5. thin-grout grouting pump; 6. main thick-grout grouting pipeline; 7. main thin-grout grouting pipeline; 8-1 to 8-4. flow sensor; 9-1 to 9-4. flow sensor; 10-1 to 10-4. mixing and stirring tank; 11-1 to 11-4. pressure sensor; 12-1 to
12- 4. flow sensor; 13-1 to 13-4. grouting branch; 14. intelligent control system; 14-1. permeability detection module; 14-2. grout proportioning module; 14-3. grouting control module; 14-4. computer; A1 to A4. electric three-way valve; B1 to B4. electric three-way valve; C1 to C4. flow regulating valve; D1 to D4. flow regulating valve; and E1 to E4. pressure regulating valve.
DETAILED DESCRIPTION OF THE INVENTION
A grouting method of the present invention is further described with reference to the accompanying drawings:
As shown in FIG. 1, an intelligent grouting system for a complex geological region is provided, including a thick grout storage tank 1, a thin grout storage tank 2, grouting pumps 4 and 5, an intelligent control system 14, and a plurality of grouting branches
13- 1 to 13-4 correspondingly disposed according to the number of drill holes. The thick grout storage tank 1 is connected to a main thick-grout grouting pipeline 6, the thin grout storage tank 2 is connected to a main thin-grout grouting pipeline 7, and the main grouting pipelines are respectively provided with the grouting pumps 4 and 5. The grouting branches 13-1 to 13-4 include mixing and stirring tanks 10-1 to 10-4, and thick-grout grouting branch pipes, thin-grout grouting branch pipes, and mixed grouting pipes that are connected to the mixing and stirring tanks 10-1 to 10-4, respectively. The thick-grout grouting branch pipes and the thin-grout grouting branch pipes are respectively connected to the main thick-grout grouting pipeline 6 and the main thin-grout grouting pipeline 7 by means of electric three-way valves A1 to A4 and B1 to B4, and the thick-grout grouting branch pipes and the thin-grout grouting branch pipes are provided with flow sensors 8-1 to 8-4 and 9-1 to 9-4 and flow regulating valves C1 to C4 and D1 to D4, respectively. The mixed grouting pipes are connected to grouting holes, and provided with pressure sensors 11-1 to 11-4, flow sensors 121 to 12-4, and pressure regulating valves E1 to E4. The flow sensors 8-1 to 8-4, 9-1 to 9-4, and 12-1 to 12-4, the flow regulating valves C1 toC4and D1 to D4, the pressure sensors 11-1 to 11-4, and the pressure regulating valves E1 to E4 are each connected to the intelligent control system 14.
The thick-grout grouting pump 4 or the thin-grout grouting pump 5 is connected to a water tank 3.
For the thick-grout grouting pump 4 or the thin-grout grouting pump 5, because of a flow diversion action, a large-flow high-pressure grouting pump is selected to ensure that when flow diversion is performed on a main pipeline, each branch pipeline has a sufficient grouting pressure, thereby guaranteeing the grouting quality.
A density sensor is disposed in each of the mixing and stirring tanks 10-1 to 104, and is used to transfer in real time the concentration information of a mixed grout to the intelligent control system 14, so as to achieve real-time monitoring and ensure that the concentration of the formulated grout meets the requirement.
As shown in FIG. 3, the intelligent control system 14 is composed of a permeability detection module 14-1, a grout proportioning module 14-2, a grouting control module 14-3, and a computer 14-4. The permeability detection module 14-1, the grout proportioning module 14-2, and the grouting control module 14-3 receive information fed back by data collection devices, and the computer 14-4 stores and analyzes the information and controls valves on pipelines. The permeability detection module 14-1 collects information by using the pressure sensors 11-1 to 11-4 and the flow sensors 8-1 to 8-4 and 9-1 to 9-4 that are mounted on the thick-grout grouting branch pipes and the thin-grout grouting branch pipes of the grouting branches 13-1 to 13-4, and stores the information into the computer 14-4 for related calculation and analysis. The grout proportioning module 14-2 performs an analysis according to information collected by the flow sensors 8-1 to 8-4 and 9-1 to 9-4 on the thick-grout grouting branch pipes and the thin-grout grouting branch pipes, and then controls openings of the flow regulating valves C1 to C4 and D1 to D4 on the thick-grout grouting branch pipes and the thin-grout grouting branch pipes, such that grouts are mixed in the mixing and stirring tanks 10-1 to 10-4 in designed flow ratios, so as to obtain expected grout concentrations. The grouting control module 14-3 collects information by using the pressure sensors 11-1 to 11-4 and the flow sensors 12-1 to 12-4 that are mounted on the mixed grouting pipes of pipelines of the grouting branches 13-1 to 13-4, monitors in real time on grouting statuses of the grouting holes, performs corresponding controls by means of the pressure regulating valves E1 to E4, and when an end criterion is met, closes the electric three-way valves A1 to A4 and B1 to B4 of the grouting branches 13-1 to 13-4.
The present invention provides an intelligent grouting method for a complex geological region, including: porous permeability detection in a complex geological region, intelligent adjustment of grouting parameters, monitoring and real-time feeding back of information, and real-time control by an intelligent control system, where the method includes the following specific steps:
step (1): selecting a region in a target grouting roadway for supporting, and determining positions and sizes of grouting holes according to a design requirement;
step (2): simultaneously performing permeability detection in a plurality of holes in the region, and obtaining permeability coefficients of the grouting holes through calculation by using a formula according to data obtained by sensors;
step (3): determining optimal grout concentrations in the grouting holes based on the permeability coefficients of the grouting holes in the region, and intelligently adjusting the grouting parameters;
step (4): monitoring, by using sensors on pipelines of the grouting branches 13-1 to 13-4, grouting in the pipelines of the branches, and feeding back collected information to the intelligent control system 14; and step (5): controlling in real time, by the intelligent control system 14 and according to the information fed back, grouting statuses of the grouting branches 13-1 to 13-4, and ending the grouting when a final grouting ending pressure is reached.
For the permeability detection, the grouting pump 4 or 5 connecting to a water tank 3 presses water in the plurality of holes in the complex geological region simultaneously, the pressure sensors 11-1 to 11-4 and the flow sensors 12-1 to 12-4 on mixed grouting pipes of the pipelines of the grouting branches 13-1 to 13-4 obtain water injection pressures and flow rates, and the permeability coefficients of the grouting holes are obtained through calculation by using a related formula.
For the intelligent adjustment of grouting parameters, the optimal grout concentrations for the grouting holes are respectively determined based on the permeability coefficients of the grouting holes, flow rates of a thick grout and a thin grout are adjusted in ratios by adjusting flow regulating valves C1 to C4 and D1 to D4 on thick-grout grouting branch pipes and thin-grout grouting branch pipes of the grouting branches 13-1 to 13-4, and the thick grout and the thin grout are mixed in mixing and stirring tanks 10-1 to 10-4, so as to obtain different grout concentrations, achieving respective optimal grout concentrations for the grouting holes.
For the monitoring and real-time feeding back of information, sensors on the grouting branches 13-1 to 13-4 feed back in real time information of pressures and flow rates on corresponding pipelines to the intelligent control system 14, and feed back in real time flow rates in branch pipes, such that the intelligent control system 14 controls grout concentrations.
The grouting method includes: respectively storing two concentrations of cement grouts into a thick grout storage tank 1 and a thin grout storage tank 2; inputting, by grouting pumps 4 and 5, the grouts from the grout storage tanks into mixing and stirring tanks 10-1 to 10-4; respectively controlling, by the intelligent control system 14, openings of electric three-way valves A1 to A4 and B1 to B4 on the thick-grout grouting branch pipes and thin-grout grouting branch pipes of grouting branches 13-1 to 13-4 corresponding to the grouting holes, so as to control concentrations of grouts entering the mixing and stirring tanks 10-1 to 10-4; when the grout concentrations in the mixing and stirring tanks 10-1 to 10-4 satisfy the optimal grout concentrations corresponding to the grouting holes, controlling, by the intelligent control system 14, the mixing and stirring tanks 10-1 to 10-4 to input grouts into the grouting holes, and simultaneously controlling pressure regulating valves E1 to E4 on mixed grouting pipes to control grouting pressures; and when a final grouting ending pressure is reached in a single grouting hole, ending grouting in the hole, and once grouting in all the grouting holes in the grouting region is completed, ending grouting in the region, and entering grouting in a next region.
For the grout concentration, according to the present invention, a water-to-cement ratio of the thick grout is 2:1, and a water-to-cement ratio of the thin grout water is 0.6:1, and when the permeability coefficients of the grouting holes are obtained by permeability detection, the optimal grout concentrations in the grouting holes can be known according to the permeability coefficients; and required grout concentrations are obtained by mixing and proportioning the thick grout and the thin grout at different flow rates.
For the grouting pressure, when grouting is performed in a grouting hole, a grouting pressure needs to be controlled such that it is not excessively high, and in order to avoid fracturing of rock mass, a highest grouting pressure should be set, and during the grouting process, if the highest grouting pressure is reached, control should be performed in time, and a pressure regulating valve is used to reduce the pressure.
For the final grouting ending pressure, in the target grouting region, according to grouting pressures that are fed back in real time by pressure sensors 11-1 to 11-4 on mixed grouting pipes of the grouting branches 13-1 to 13-4, when a grouting pressure of a particular grouting hole in the region suddenly increases, it is considered that the designed grouting hole region is fully filled with the grout, resulting in the phenomenon of the suddenly increased pressure, and at this time, the final grouting ending pressure is reached in the grouting hole, and the grouting is ended; and when the final grouting ending pressure is reached in all the grouting holes in the target region, it is considered that the final grouting ending pressure is reached in grouting in the region, and the grouting is ended in the region and is transferred to a next region.
Embodiment 1
As shown in FIG. 2, the present invention also provides an intelligent grouting method using the foregoing system, including the following specific steps.
Step 1. A region in a target grouting roadway for supporting is selected, and positions and sizes of grouting holes are determined according to a design requirement, so as to ensure that a distance between grouting holes is not less than a diffusion radius of a grout.
Step 2. Electric three-way valves A1 to A4 of a main thick-grout grouting pipeline 6 are opened, and a grouting pump 4 is activated, such that a water flow is diverted into each grouting branch pipelines 13-1 to 13-4 through a pipeline connecting to a water tank 3 via the electric three-way valves A1 to A4, and water is injected into the grouting holes simultaneously, and a water injection pressure and a flow rate are obtained in real time by using pressure sensors 11-1 to 11-4 and flow sensors 12-1 to 12-4 on the grouting branch pipelines 13-1 to 13-4, the collected information is transmitted to an intelligent control system 14, and a permeability q and a permeability coefficient K of each grouting hole is obtained through calculation, where the calculation formulas are as follows:
in which, Q is a water injection quantity of a drill hole, in unit of L/min; p is a pressure of the drill hole, in unit of MPa; and Lisa length of the drill hole, in unit of m; and
l.fLp r 2/T r in which, r is a radius of the drill hole, in unit of m.
Step 3. A permeability coefficient of each hole is obtained through calculation according to the information fed back, and an optimal grout concentration in each grouting hole is determined according to the permeability coefficient; because a thick grout enters thick grout branch pipes through the main thick-grout grouting pipeline 6 via the electric three-way valves A1 to A4, and a thin grout enters thin grout branch pipes through a main thin-grout grouting pipeline 7 via electric three-way valves B1 to B4, flow regulating valves Cl to C4 and D1 to D4 on the thick grout branch pipes and the thin grout branch pipes are adjusted such that the grouts are mixed in controlled flow rates, so as to reach required grout concentrations.
Assuming that the required grout concentration is n:1 and a ratio of injection amounts of the thick grout and the thin grout is A:B, and it is known that the concentration of the thick grout is 2:1 and the concentration of the thin grout is 0.6:1, then the following can be obtained:
u ]2ζ1-0.6β = π
I OTfZ? = 1
It can be obtained from the equation that an injection ratio of the thick grout to the
A //-0.6 thin qrout is: — --.
' Λ :2 - f7
Step 4. The thick grout and the thin grout for which flow regulation has been done are fully mixed through grout mixing and stirring tanks 10-1 to 10-4, and then enter the branch grouting pipelines 13-1 to 13-4. After the grouts enter the branch grouting pipelines 13-1 to 13-4, real-time grouting pressures can be obtained by using pressure sensors 11-1 to 11-4, the collected information is fed back in real time to an intelligent control system 14, and the intelligent control system 14 performs regulation by controlling pressure regulating valves E1 to E4 on the branch grouting pipelines. According to the permeability, a pressure at which fracturing of rock mass occurs is determined by a formula. The calculation formula is as follows:
p = σ( - 3o\ + τη in which, p is a grouting pressure, in unit of pa; σ( is a highest tensile pressure, in unit of pa; oi is a highest main pressure, in unit of pa; and σ.? is a lowest main pressure, in unit of pa.
Step 5. Real-time monitoring is performed by means of the pressure sensors 111 to 11-4 and the flow sensors 14-1 to 14-4, to determine real grouting statuses of the grouting holes, and based on information fed back in real time, when a final grouting ending pressure is reached in one of the grouting holes, the electric three-way valves of the pipeline are closed, and when the final grouting ending pressure is reached in all the grouting holes in the target region, grouting is ended, and grouting is performed in a next region.
Herein, only four grouting branch pipelines are listed. However, during actual application, the number of the grouting branch pipelines can be increased according to the number of grouting holes in a target range, without affecting implementation of the present invention.
Claims (10)
- What is claimed is:1. An intelligent grouting system for a complex geological region, comprising a thick grout storage tank, a thin grout storage tank, grouting pumps, an intelligent control system, and a plurality of grouting branches correspondingly disposed according to the number of drill holes, wherein the thick grout storage tank is connected to a main thick-grout grouting pipeline, the thin grout storage tank is connected to a main thingrout grouting pipeline, and each of the main grouting pipelines is respectively provided with the grouting pump; the grouting branches comprise mixing and stirring tanks, and thick-grout grouting branch pipes, thin-grout grouting branch pipes, and mixed grouting pipes that are connected to the mixing and stirring tanks, respectively; the thick-grout grouting branch pipes and the thin-grout grouting branch pipes are respectively connected to the main thick-grout grouting pipeline and the main thingrout grouting pipeline by means of electric three-way valves, and the thick-grout grouting branch pipes and the thin-grout grouting branch pipes are provided with flow sensors and flow regulating valves, respectively; the mixed grouting pipes are connected to grouting holes, and are provided with pressure sensors, flow sensors, and pressure regulating valves; and the flow sensors, the flow regulating valves, the pressure sensors, and the pressure regulating valves are each connected to the intelligent control system.
- 2. The intelligent grouting system for a complex geological region according to claim 1, wherein the thick-grout grouting pump or the thin-grout grouting pump is connected to a water tank; and a large-flow high-pressure grouting pump is selected as the grouting pump.
- 3. The intelligent grouting system for a complex geological region according to claim 1, wherein a density sensor is disposed in each of the mixing and stirring tanks, and is used to transfer in real time the concentration information of a mixed grout to the intelligent control system, so as to achieve real-time monitoring and to ensure that the concentration of the formulated grout meets a requirement.
- 4. The intelligent grouting system for a complex geological region according to claim 1, wherein the intelligent control system is composed of a permeability detection module, a grout proportioning module, a grouting control module, and a computer, wherein the permeability detection module, the grout proportioning module, and the grouting control module receive information fed back by data collection devices, and the computer stores and analyzes the information and controls valves on each pipelines; the permeability detection module collects information by means of the pressure sensors and the flow sensors that are mounted on the thick-grout grouting branch pipes and the thin-grout grouting branch pipes of the each grouting branches, and stores the information into the computer for related calculation and analysis; the grout proportioning module performs an analysis according to information collected by the flow sensors on the thick-grout grouting branch pipes and the thin-grout grouting branch pipes, and then controls openings of the flow regulating valves on the thickgrout grouting branch pipes and the thin-grout grouting branch pipes, such that grouts are mixed in the mixing and stirring tanks in designed flow ratios, so as to obtain expected grout concentrations; and the grouting control module collects information by means of the pressure sensors and the flow sensors that are mounted on the mixed grouting pipes of pipelines of the each grouting branches, monitors in real time on grouting statuses of the each grouting holes, performs corresponding controls by means of the pressure regulating valves, and when an end criterion is met, closes the electric three-way valves of the grouting branches.
- 5. An intelligent grouting method for a complex geological region using the system of any one of claims 1 to 4, comprising: permeability detection in a complex geological region, intelligent adjustment of grouting parameters, monitoring and real-time feeding back of information, and real-time control by an intelligent control system, wherein the method comprises the following specific steps:step (1): selecting a region in a target grouting roadway for supporting, and determining positions and sizes of grouting holes according to a design requirement;step (2): simultaneously performing permeability detection in a plurality of holes in the region, and obtaining permeability coefficients of each grouting holes through calculation by using a formula according to data obtained by sensors;step (3): determining optimal grout concentrations in each grouting holes based on the permeability coefficients of the each grouting holes in the region, and intelligently adjusting the grouting parameters;step (4): monitoring, by means of sensors on pipelines of each grouting branches, grouting in the pipelines of each branches, and feeding back collected information to the intelligent control system; and step (5): controlling in real time, by the intelligent control system and according to the information fed back, grouting statuses of the each grouting branches, and ending grouting when a final grouting ending pressure is reached.
- 6. The intelligent grouting method for a complex geological region according to claim 5, wherein for the permeability detection, a grouting pump connecting to a water tank pumps water in the plurality of holes in the complex geological region simultaneously, pressure sensors and flow sensors on mixed grouting pipes of the pipelines of the grouting branches obtain water injection pressures and flow rates, and the permeability coefficients of the each grouting holes are obtained through calculation by using a related formula; for the intelligent adjustment of grouting parameters, the optimal grout concentrations for the each grouting holes is respectively determined based on the permeability coefficients of the each grouting holes, flow rates of a thick grout and a thin grout are adjusted in ratios by adjusting flow regulating valves on thick-grout grouting branch pipes and thin-grout grouting branch pipes of the each grouting branches, and the thick grout and the thin grout are mixed in mixing and stirring tanks, so as to obtain different grout concentrations, achieving respective optimal grout concentrations for the each grouting holes; and for the monitoring and real-time feeding back of information, sensors on the each grouting branches feed back in real time information of pressures and flow rates on corresponding pipelines to the intelligent control system, and feed back in real time flow rates in branch pipes, such that the intelligent control system controls grout concentrations.
- 7. The intelligent grouting method for a complex geological region according to claim 5, wherein the grouting method comprises: respectively storing two concentrations of cement grouts into a thick grout storage tank and a thin grout storage tank; inputting, by grouting pumps, the grouts from the grout storage tanks into mixing and stirring tanks; respectively controlling, by the intelligent control system, openings of electric three-way valves on thick-grout grouting branch pipes and thin-grout grouting branch pipes of the each grouting branches corresponding to the grouting holes, so as to control concentrations of grouts entering the mixing and stirring tanks; when the grout concentrations in the mixing and stirring tanks satisfy the optimal grout concentrations corresponding to the grouting holes, controlling, by the intelligent control system, the mixing and stirring tanks to input grouts into the grouting holes, and simultaneously controlling pressure regulating valves on mixed grouting pipes to control grouting pressures; and when a final grouting ending pressure is reached in a single grouting hole, ending grouting in the hole, and once grouting in all the grouting holes in the grouting region is completed, ending grouting in the region, and entering grouting in a next region.
- 8. The intelligent grouting method for a complex geological region according to claim 5, wherein for the grout concentration, a water-to-cement ratio of the thick grout is 2:1, and a water-to-cement ratio of the thin grout water is 0.6:1, and when the permeability coefficients of the each grouting holes are obtained by permeability detection, the optimal grout concentrations in the each grouting holes can be known according to the permeability coefficients; and required grout concentrations are obtained by mixing and proportioning the thick grout and the thin grout at different flow rates.
- 9. The intelligent grouting method for a complex geological region according to claim 5, wherein for the grouting pressure, when grouting is performed in a grouting hole, a grouting pressure needs to be controlled such that it is not excessively high, and in order to avoid fracturing of rock mass, a highest grouting pressure should be set, and during the grouting process, if the highest grouting pressure is reached, control should be performed in time, and a pressure regulating valve is used to reduce the pressure.
- 10. The intelligent grouting method for a complex geological region according to claim 5, wherein for the final grouting ending pressure, in the target grouting region, according to grouting pressures that are fed back in real time by pressure sensors on mixed grouting pipes of the grouting branches, when a grouting pressure of a particular grouting hole in the region suddenly increases, it is considered that the designed grouting hole region is fully filled with the grout, resulting in the phenomenon of the suddenly increased pressure, and at this time, the final grouting ending pressure is reached in the grouting hole, and the grouting is ended; and when the final grouting ending pressure is reached in all the grouting holes in the target region, it is considered that the final grouting ending pressure is reached in grouting in the region, and the grouting is ended in the region and is transferred to a next region.1/3
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711036858.3 | 2017-10-30 | ||
| CN201711036858.3A CN107956483B (en) | 2017-10-30 | 2017-10-30 | Intelligent grouting system and grouting method for complex geological region |
| PCT/CN2018/085303 WO2019085424A1 (en) | 2017-10-30 | 2018-05-02 | Smart grouting system and grouting method for geologically complex regions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2018360897A1 true AU2018360897A1 (en) | 2019-05-30 |
| AU2018360897B2 AU2018360897B2 (en) | 2020-06-18 |
Family
ID=61964221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2018360897A Active AU2018360897B2 (en) | 2017-10-30 | 2018-05-02 | Intelligent grouting system and grouting method for complex geological region |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN107956483B (en) |
| AU (1) | AU2018360897B2 (en) |
| WO (1) | WO2019085424A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107956483B (en) * | 2017-10-30 | 2020-02-18 | 中国矿业大学 | Intelligent grouting system and grouting method for complex geological region |
| CN108914937B (en) * | 2018-08-07 | 2024-03-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Roadbed grouting device |
| CN109701417A (en) * | 2018-11-30 | 2019-05-03 | 广州草木蕃环境科技有限公司 | A kind of liquid medicine injection system |
| CN109914400B (en) * | 2019-02-28 | 2021-02-09 | 东南大学 | Cement slurry concentration real-time regulation and control device for cement-soil mixing pile and use method thereof |
| CN111240372A (en) * | 2020-01-15 | 2020-06-05 | 淮南东华欧科矿山支护设备有限责任公司 | Water-cement ratio control device for mine |
| CN112052505B (en) * | 2020-09-07 | 2022-10-11 | 中南大学 | Design method for grouting hole distance of cement-water glass double-liquid slurry |
| CN114517577A (en) * | 2020-11-18 | 2022-05-20 | 广东博智林机器人有限公司 | Grouting alignment method and device, grouting equipment and storage medium |
| CN113153429B (en) * | 2021-03-04 | 2022-06-10 | 中国矿业大学 | Method and system for online monitoring of underground coal mine grouting and intelligent evaluation of grouting quality |
| CN114412512A (en) * | 2022-01-24 | 2022-04-29 | 渭南陕煤启辰科技有限公司 | Remote rapid and accurate grouting construction device and using method |
| CN116122891A (en) * | 2023-03-01 | 2023-05-16 | 中国矿业大学(北京) | Device and method for improving extraction effect through secondary intelligent hole sealing of gas extraction drilling |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10310599A1 (en) * | 2003-03-11 | 2004-09-23 | Linde Ag | Spraying concrete spray onto an object via nozzles with addition of carbon dioxide to the concrete useful as a safety measure in tunnel and side wall construction and for construction of mine walls |
| CN102011407B (en) * | 2010-08-31 | 2012-01-11 | 中国电力工程顾问集团中南电力设计院 | Method for repeated grouting of anchor foundation full section of power transmission line tower site group |
| CN102182470A (en) * | 2011-03-21 | 2011-09-14 | 同济大学 | Full-section sealing extrusion grouting method |
| CN104196030B (en) * | 2014-09-17 | 2016-01-13 | 中国水利水电第七工程局有限公司 | Portable abnormal concrete intelligent high-pressure filling system and grouting method |
| CN104632252B (en) * | 2015-01-09 | 2017-05-10 | 广州鑫桥建筑劳务有限公司 | Automatic grouting system |
| KR20160096753A (en) * | 2015-02-05 | 2016-08-17 | (주)케미우스코리아 | Method and System for spraying shotcrete |
| CN204715360U (en) * | 2015-06-15 | 2015-10-21 | 江西大地岩土工程有限公司 | A kind of fully-automatic intelligent provisions for grouting |
| CN205558931U (en) * | 2016-04-28 | 2016-09-07 | 河北钢铁集团矿业有限公司 | Automatic slip casting device of underground mine |
| CN106321117B (en) * | 2016-10-13 | 2018-09-21 | 北京航空航天大学 | A kind of cement mortar intelligent multipoint perfusion system |
| CN107956483B (en) * | 2017-10-30 | 2020-02-18 | 中国矿业大学 | Intelligent grouting system and grouting method for complex geological region |
-
2017
- 2017-10-30 CN CN201711036858.3A patent/CN107956483B/en active Active
-
2018
- 2018-05-02 AU AU2018360897A patent/AU2018360897B2/en active Active
- 2018-05-02 WO PCT/CN2018/085303 patent/WO2019085424A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| AU2018360897B2 (en) | 2020-06-18 |
| CN107956483B (en) | 2020-02-18 |
| WO2019085424A1 (en) | 2019-05-09 |
| CN107956483A (en) | 2018-04-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2018360897B2 (en) | Intelligent grouting system and grouting method for complex geological region | |
| CN107355206B (en) | A kind of shale gas horizontal well refracturing temporarily blocks up critical pressure test method | |
| CN108919348A (en) | A kind of crack rock intelligence slip casting TT&C system and implementation method | |
| CN103410182A (en) | Unilateral pile foundation unloading horizontal top-level pull deviation rectifying and broken pile reinforcement construction method | |
| CN111119990B (en) | Industrial-grade multifunctional paste filling test platform and test method | |
| CN109374508A (en) | A kind of tailing row's infiltration system silting imitative experimental appliance and experimental method | |
| CN106338419A (en) | Porous multi-angle adjustable-depth type split-grouting specimen preparation device and method | |
| CN106781962B (en) | A kind of heterogeneous isotropic aquifer seepage action of ground water rule simulation test device | |
| CN102507264A (en) | Underwater fixed horizon sampling device and method | |
| CN208137906U (en) | Actual triaxial testing apparatus is used in a kind of temporarily stifled steering behaviour evaluation | |
| CN106053297A (en) | An experimental system for intelligent penetration sampling and on-line monitoring for soil and underground water pollutants | |
| CN114036625B (en) | Intelligent construction method and system suitable for in-situ reinforcement of large-area soft foundation | |
| Fan et al. | Cement grouting online monitoring and intelligent control for dam foundations | |
| CN208273812U (en) | A kind of planting garlic drip irrigation system | |
| CN108692129A (en) | A kind of method of pipeline rehabilitation filling slip casting | |
| CN104808262A (en) | Long-term forest eco-hydrology water yield automation dynamic measurement method and device | |
| CN206532507U (en) | A kind of heterogeneous isotropic aquifer seepage action of ground water rule simulation testing instrument | |
| CN210140828U (en) | Post-grouting integrated system | |
| CN206448273U (en) | A kind of continuous steel frame aqueduct GG2# pier foundation grouting systems | |
| CN114382514A (en) | Intelligent multi-hole anchoring and grouting system and method for soft rock roadway | |
| CN111472839B (en) | Comprehensive seepage control-based quantitative calculation method for water discharge of water-rich tunnel construction | |
| CN208636433U (en) | A kind of crack rock intelligence slip casting TT&C system | |
| CN205941291U (en) | Water mechanism is led to in pressurization suitable for two dimension rock sample displacement seepage tests | |
| CN209724594U (en) | For stablizing the device of slush pump slurry-outlet quantity | |
| CN204899889U (en) | Exempt from to throw and drag for real -time observing and controlling water injection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DA3 | Amendments made section 104 |
Free format text: THE NATURE OF THE AMENDMENT IS: AMEND THE INVENTION TITLE TO READ INTELLIGENT GROUTING SYSTEM AND GROUTING METHOD FOR COMPLEX GEOLOGICAL REGION |
|
| FGA | Letters patent sealed or granted (standard patent) |