CN117145575A - Underground coal mine solid waste slurry filling method and system - Google Patents
Underground coal mine solid waste slurry filling method and system Download PDFInfo
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- CN117145575A CN117145575A CN202311182811.3A CN202311182811A CN117145575A CN 117145575 A CN117145575 A CN 117145575A CN 202311182811 A CN202311182811 A CN 202311182811A CN 117145575 A CN117145575 A CN 117145575A
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- waste slurry
- drilling
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- 239000002910 solid waste Substances 0.000 title claims abstract description 84
- 239000002002 slurry Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 62
- 239000011435 rock Substances 0.000 claims abstract description 21
- 238000010276 construction Methods 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 8
- 238000004088 simulation Methods 0.000 claims description 15
- 230000015572 biosynthetic process Effects 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 11
- 230000035699 permeability Effects 0.000 claims description 10
- 238000000638 solvent extraction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 238000009270 solid waste treatment Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000012466 permeate Substances 0.000 description 5
- 239000003250 coal slurry Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000002579 anti-swelling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention specifically discloses a method and a system for filling underground coal mine solid waste slurry, wherein the method for filling underground coal mine solid waste slurry comprises the steps of determining a target stratum layer where a drilling hole is located; performing construction of a borehole, and enabling the borehole to be located in the target stratum layer; and carrying out fracturing grouting and solid waste slurry filling grouting on a target area, forming a fracture network in the rock stratum in the target area through the fracturing grouting, and filling the solid waste slurry to a goaf through the fracture network through the solid waste slurry filling grouting. According to the underground coal mine solid waste slurry filling method, solid waste can be filled into the underground goaf, the underground space is fully utilized to realize waste treatment, the solid waste is not required to be lifted, the solid waste treatment cost is reduced, the ground surface environment is not damaged, and the goaf can be filled, so that the ground surface settlement is avoided.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a method and a system for filling underground coal mine solid waste slurry.
Background
Coal mining is an important component of the energy industry in China, however, one of the following problems is the treatment of waste. Solid waste such as gangue and tailings has long been the focus of resource waste and environmental pollution.
The treatment mode in the related technology mainly adopts a lifting well landfill, but the mode wastes potential resources, has high solid waste treatment cost, and also causes serious damage to the environment, thereby causing land degradation and geological environment degradation.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a method for filling underground solid waste slurry in a coal mine, which can fill solid waste into an underground goaf, fully utilizes an underground space to realize waste treatment and reduces the solid waste treatment cost.
The embodiment of the invention also provides a coal mine underground solid waste slurry filling system.
The method for filling the underground coal mine solid waste slurry comprises the following steps:
determining a target stratum layer where the drilling hole is located;
performing construction of a borehole, and enabling the borehole to be located in the target stratum layer;
and carrying out fracturing grouting and solid waste slurry filling grouting on a target area, forming a fracture network in the rock stratum in the target area through the fracturing grouting, and filling the solid waste slurry to a goaf through the fracture network through the solid waste slurry filling grouting.
According to the underground coal mine solid waste slurry filling method, solid waste can be filled into the underground goaf, the underground space is fully utilized to realize waste treatment, the solid waste is not required to be lifted, the solid waste treatment cost is reduced, the ground surface environment is not damaged, and the goaf can be filled, so that the ground surface settlement is avoided.
In some embodiments, the determining the target formation horizon at which the borehole is located includes:
performing advanced geological survey to acquire survey data;
determining the layer positions of the rock stratum fracture zone and the collapse zone in the working surface top plate based on the survey data;
and taking the junction area of the rock stratum fracture zone and the collapse zone of the working face top plate as the target stratum layer, and arranging high-level drilling in advance of the working face.
In some embodiments, the performing the construction of the borehole includes:
arranging grouting drilling sites on adjacent roadways of the working face;
taking the junction area of the stratum fracture zone and the collapse zone of the working face top plate as a target stratum layer, and applying drilling by adopting directional drilling;
real-time measurement of geological parameters and engineering parameters is carried out while drilling;
and verifying the drilling direction of the directional drill based on the geological parameters and engineering parameters so as to enable the drill hole to be positioned in the target stratum layer.
In some embodiments, a measurement system is installed on the directional drill to make real-time measurements of geological parameters including at least one of resistivity, gamma, porosity, formation density.
In some embodiments, the fracturing grouting and solid waste slurry filling grouting of the target area adopts a segmented fracturing filling, and the segmented fracturing filling comprises:
partitioning the goaf after stoping of the working face;
segmenting the target stratum layer where the drilling hole is located based on the subareas to form a plurality of grouting filling sections;
arranging grouting pipes and packers in a borehole, and carrying out fracturing grouting and solid waste slurry filling grouting on a plurality of grouting filling sections section by section from the bottom of the borehole.
In some embodiments, the frac grouting and solid waste slurry fill grouting comprises:
performing fracturing grouting on the grouting filling section to form a fracture network in a rock stratum of the grouting filling section;
performing a simulation test on the solid waste slurry to obtain simulation data;
determining process parameters of the solid waste slurry filling grouting based on the simulation data and the permeability of the grouting filling section;
and filling and grouting the solid waste slurry in the goaf.
In some embodiments, the simulation data includes at least one of flowability, permeability, and pressure profile.
The underground coal mine solid-waste slurry filling system provided by the embodiment of the invention is used for the construction of the underground coal mine solid-waste slurry filling method in any one of the embodiments, and comprises the following steps:
the working chamber is positioned in the adjacent roadway of the working face;
the drilling equipment is arranged in the working chamber and is used for leading a working surface to arrange high-level drilling holes;
the grouting equipment is arranged in the working chamber and is used for carrying out fracturing grouting and solid waste slurry filling grouting after working face extraction.
In some embodiments, the grouting apparatus includes a grouting pipe and a packer disposed at an end of the grouting pipe.
In some embodiments, the grouting apparatus comprises a plurality of grouting pumps arranged in parallel.
Drawings
FIG. 1 is a schematic diagram of a coal mine underground solid waste slurry filling structure according to an embodiment of the invention.
FIG. 2 is a process flow diagram of a method for filling coal mine underground solid waste slurry in accordance with another embodiment of the present invention.
FIG. 3 is a process flow diagram of a method for filling a coal mine underground coal slurry in accordance with yet another embodiment of the present invention.
FIG. 4 is a process flow diagram of a method for filling a coal mine underground coal slurry in accordance with yet another embodiment of the present invention.
FIG. 5 is a process flow diagram of a method for filling a coal mine underground coal slurry in accordance with yet another embodiment of the present invention.
FIG. 6 is a process flow diagram of a method for filling a coal mine underground coal slurry in accordance with yet another embodiment of the present invention.
Reference numerals:
100. drilling holes;
200. a working surface;
300. a packer;
400. a fracture network;
500. grouting equipment.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
As shown in fig. 1 and 2, the method for filling underground coal mine solid waste slurry according to the embodiment of the invention comprises the following steps:
s101, determining a target stratum level where the drilling hole 100 is located, specifically, ensuring effectiveness of the drilling hole 100 by the arrangement position of the drilling hole 100, taking the drilling hole 100 as an effective grouting channel in the process of filling and grouting solid waste slurry, fully utilizing a stratum structure of a production area to ensure that the solid waste slurry can permeate and fill into a goaf, and selecting a proper target stratum level can improve the feasibility of solid waste grouting to ensure that the solid waste slurry can fully and uniformly permeate and fill into the goaf, so that strength and stability of a filled filler are improved.
S102, performing construction of the drilling hole 100, and enabling the drilling hole 100 to be located in a target stratum layer.
It should be noted that, the construction of the borehole 100 may be performed in advance before the stoping of the working surface 200, and the borehole 100 is located in the target stratum layer, so as to ensure the accuracy of the path of the borehole 100, the effectiveness of the grouting channel, and the feasibility of grouting, where the drilling of the borehole 100 may be performed by directional drilling.
And S103, performing fracturing grouting and solid waste slurry filling grouting on the target area, forming a fracture network 400 in the rock stratum in the target area through fracturing grouting, and filling the solid waste slurry to the goaf through the fracture network 400 through solid waste slurry filling grouting.
That is, when grouting is performed, the fracture network 400 is manufactured in the rock stratum of the target area through fracturing grouting, the permeability of the solid waste grouting is improved, the fluidity and the filling effect of the solid waste grouting are guaranteed, and after the fracturing grouting of the target area is completed, the solid waste grouting liquid filling grouting is performed, so that the filling effect is guaranteed, and the sufficient solid waste grouting liquid is ensured to be filled into the goaf of the working surface 200.
According to the underground coal mine solid waste slurry filling method, solid waste can be filled into the underground goaf, the underground space is fully utilized to realize waste treatment, the solid waste is not required to be lifted, the solid waste treatment cost is reduced, the ground surface environment is not damaged, and the goaf can be filled, so that the ground surface settlement is avoided.
As shown in fig. 3, in some embodiments, determining the target formation horizon at which borehole 100 is located includes:
s201, performing advanced geological survey to acquire survey data.
Specifically, in order to determine the target stratum level, advanced geological survey is required, and survey data is acquired, so that the distribution condition of the stratum and the development condition of cracks can be determined according to the survey data, and the conditions of permeability, slurry fluidity and the like of the roof stratum of the working face 200 can be determined.
Optionally, a target formation horizon is disposed in the top formation of the face 200.
S202, determining the layer positions of the rock stratum fracture zone and the collapse zone in the top plate of the working surface 200 based on survey data.
According to the rock stratum control theory and the survey data, the movement condition of the roof rock stratum after stoping of the working surface 200 can be judged, so that the positions of the collapse zone and the fracture zone of the working surface 200 are determined, and the target stratum level is determined according to the positions of the collapse zone and the fracture zone of the working surface 200, so that the geological characteristics of the collapse zone and the fracture zone can be fully utilized in the subsequent fracturing grouting process, a large-scale high-permeability area is formed, and the grouting filling effect of solid waste slurry is improved.
S203, taking the junction area of the rock stratum fracture zone and the collapse zone of the top plate of the working surface 200 as a target stratum layer, and arranging the high-level drilling 100 in advance of the working surface 200.
Specifically, before stoping of the working surface, based on surveying and advanced prejudging of the rock stratum fracture zone and the collapse zone, the boundary area of the rock stratum fracture zone and the collapse zone of the top plate of the working surface 200 is set as a target stratum layer, and then the track of the drilling hole 100 is arranged in the target stratum layer so as to guide the drilling direction in the construction process of the drilling hole 100.
As shown in fig. 4, in some embodiments, performing the construction of the borehole 100 includes:
s301, arranging grouting drilling sites on adjacent roadways of the working surface 200.
That is, the drilling 100 is constructed before the stoping of the working face 200, and grouting drill sites are arranged in the adjacent lanes of the working face 200, so that the drilling 100 is arranged in advance of the working face 200, and drilling equipment is arranged in the adjacent lanes of the working face 200, thereby facilitating the installation of the equipment, controlling the drilling track, reducing the construction difficulty of the drilling 100, and improving the filling grouting efficiency and effect after the stoping of the working face 200.
S302, taking the junction area of the rock stratum fracture zone and the collapse zone of the top plate of the working surface 200 as a target stratum layer, and applying drilling by adopting directional drilling.
Specifically, the application is performed by directional drilling, which directionally drills a substantially horizontal borehole 100 in the target formation horizon and places the borehole 100 at the interface area of the formation fracture zone and the fracture zone of the top plate of the working face 200.
S303, real-time measurement of geological parameters and engineering parameters of the drilling-while-drilling.
In the directional drilling process, the geological parameters of the position of the drill bit and the drilling engineering parameters are measured in real time, and data information capable of reflecting the corresponding geological properties is obtained.
S304, checking the drilling direction of the directional drill based on the geological parameters and the engineering parameters so that the drilling hole 100 is positioned in the target stratum layer.
That is, to ensure that the borehole 100 is at the junction region of the formation fracture zone and the fracture zone of the top plate of the working face 200, the current geological properties are analyzed by the geological parameters and the engineering parameters to ensure that the borehole 100 is at the junction region of the formation fracture zone and the fracture zone.
When the geological parameters and the engineering parameters are greatly suddenly changed, the deviation of the drilling track of the drilling hole 100 is indicated, the later grouting operation is not facilitated, and the deviation of the drilling hole 100 track needs to be corrected in time.
In some embodiments, a measurement system is installed on the directional drill to make real-time measurements of geological parameters including at least one of resistivity, gamma, porosity, formation density.
In the embodiment of the invention, the measurement system is arranged at the position close to the drill bit of the directional drill, so that the geological parameters during drilling are obtained, wherein the geological parameters comprise one or more of resistivity, gamma, porosity and formation density, and the geological properties are judged by using the resistivity and the gamma, or are comprehensively judged by using the resistivity, the gamma and the porosity.
Furthermore, measurement data can be acquired through other detection means, so that the geological properties can be accurately evaluated, and the drilling track is ensured to be positioned in the junction area of the rock stratum fracture zone and the collapse zone.
As shown in fig. 5, in some embodiments, the fracturing grouting and solid waste slurry filling grouting of the target area employs a segmented fracturing filling comprising:
s401, partitioning the goaf after stoping of the working face 200.
After the working face 200 is extracted for a certain distance, the goaf is filled through the high-level drilling holes 100 arranged in advance of the working face 200, in order to improve the uniformity of goaf filling and ensure the structural strength and stability of a filled filling body, the goaf is subjected to regional filling, and the size of a single filling area is reasonably divided, so that solid waste slurry can permeate through the fracture network 400 and is filled into the goaf in the filling process.
S402, segmenting a target stratum layer where the drilling hole 100 is located based on the subareas to form a plurality of grouting filling sections.
That is, according to different partitions of the goaf, the corresponding target stratum layer where the drill hole 100 is located is segmented, when grouting is performed through different grouting filling sections, effective filling of the goaf of different partitions can be achieved, the interval distance of the grouting filling sections is reasonably planned, for example, according to the development condition of the fracture network 400 when fracturing grouting is performed on one grouting point, the reasonable interval between two adjacent grouting filling sections is further determined, so that slurry can permeate into the goaf in the solid-waste slurry grouting process, the solid-waste slurry filled in each partition of the goaf is guaranteed to be uniform, and the structural stability of the filling body is guaranteed.
S403, arranging grouting pipes and packers 300 in the borehole 100, and starting from the bottom of the borehole 100, performing fracturing grouting and solid waste slurry filling grouting on a plurality of grouting filling sections section by section.
When grouting is performed, a grouting pipe and a packer 300 are arranged in the drill hole 100, the packer 300 can enable slurry in the grouting pipe to flow to one grouting filling section in a concentrated mode, the concentrated and directional flow of the slurry is guaranteed, on one hand, the effective diffusion of fracturing fluid in the grouting filling section can be improved during fracturing grouting, a fracture network 400 is formed in the grouting filling section, and on the other hand, the solid waste slurry can be ensured to be filled into a corresponding partition of a goaf with enough flow and pressure in the solid waste slurry filling grouting process.
When the filling of the corresponding goaf zone is completed through one grouting filling section, the grouting pipe and the packer 300 are moved, and the filling of the next goaf zone is already performed.
Further, with the use of the reverse type staged grouting, the slurry is gradually moved from the bottom of the borehole 100 toward the opening of the borehole 100, so as to maximally utilize the fracture network 400 generated by fracturing and prevent the slurry from leaking.
As shown in fig. 6, in some embodiments, the frac grouting and solid waste slurry pack grouting comprises:
s501, fracturing grouting is carried out on the grouting filling section so as to form a fracture network 400 in the rock stratum of the grouting filling section.
Specifically, fracture grouting is performed by using an anti-swelling fracturing fluid, and a fracture network 400 is manufactured in the roof stratum so as to enhance the permeability of the grouting fluid.
S502, performing a simulation test on the solid waste slurry to obtain simulation data.
Based on the fluid mechanics principle and Darcy's Law and other formulas, carrying out numerical simulation on the flow, permeation, pressure distribution and the like of the solid waste slurry, wherein Darcy's Law is Darcy's Law and is used for expressing the rule of the linear relation between the seepage velocity and the hydraulic gradient of the water in the saturated soil.
S503, determining the technological parameters of the solid waste slurry filling grouting based on the simulation data and the permeability of the grouting filling section.
That is, the grouting process parameters including flow, pressure and the like are optimized in combination with parameters such as permeability of the rock stratum and grouting properties, and the grouting process parameters including continuous grouting or grouting at intervals and the like are adopted to ensure that grouting liquid can fully permeate cracks and fill goafs.
S504, filling and grouting solid waste slurry in the goaf.
Specifically, after the completion of fracturing grouting, the grouting slurry is replaced by solid waste slurry, an efficient large-displacement high-pressure pump set system is adopted, a plurality of grouting pumps are connected in parallel, the grouting slurry is ensured to fill the goaf of the working face 200 at sufficient flow and pressure, and the filling effect is ensured.
In some embodiments, the simulation data includes at least one of flowability, permeability, and pressure profile. That is, one kind of simulation data may be adopted, or multiple kinds of simulation data may be adopted to perform comprehensive judgment, so as to determine the technological parameters of the solid waste slurry filling grouting.
The underground coal mine solid-waste slurry filling system of the embodiment of the invention is used for the construction of the underground coal mine solid-waste slurry filling method of any one of the embodiments, and comprises a working chamber, drilling equipment and grouting equipment 500, wherein the working chamber is positioned in an adjacent roadway of a working surface 200, the drilling equipment is arranged in the working chamber, the drilling equipment is used for leading the working surface 200 to arrange a high-level drilling 100, optionally, the drilling equipment is a directional drilling, the grouting equipment 500 is arranged in the working chamber, and the grouting equipment 500 is used for carrying out fracturing grouting and solid-waste slurry filling grouting after the working surface 200 is extracted.
In some embodiments, the grouting device 500 comprises a grouting pipe and a packer 300 arranged at the end of the grouting pipe, wherein the grouting pipe can be a high-pressure rubber hose, a flower pipe is arranged at the inner end of the grouting pipe, and the slurry is injected into the corresponding grouting filling sections through holes in the flower pipe.
In some embodiments, grouting apparatus 500 includes a plurality of grouting pumps arranged in parallel to increase the flow and pressure of grouting to ensure that sufficient grouting fluid can fill the goaf.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments described in this specification, as well as the features of the various embodiments, can be combined and combined by one skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (10)
1. The underground coal mine solid waste slurry filling method is characterized by comprising the following steps of:
determining a target stratum layer where the drilling hole is located;
performing construction of a borehole, and enabling the borehole to be located in the target stratum layer;
and carrying out fracturing grouting and solid waste slurry filling grouting on a target area, forming a fracture network in the rock stratum in the target area through the fracturing grouting, and filling the solid waste slurry to a goaf through the fracture network through the solid waste slurry filling grouting.
2. The method of claim 1, wherein determining the target formation horizon at which the borehole is located comprises:
performing advanced geological survey to acquire survey data;
determining the layer positions of the rock stratum fracture zone and the collapse zone in the working surface top plate based on the survey data;
and taking the junction area of the rock stratum fracture zone and the collapse zone of the working face top plate as the target stratum layer, and arranging high-level drilling in advance of the working face.
3. The method for filling coal mine underground solid waste slurry according to claim 2, wherein the construction of drilling comprises:
arranging grouting drilling sites on adjacent roadways of the working face;
taking the junction area of the stratum fracture zone and the collapse zone of the working face top plate as a target stratum layer, and applying drilling by adopting directional drilling;
real-time measurement of geological parameters and engineering parameters is carried out while drilling;
and verifying the drilling direction of the directional drill based on the geological parameters and engineering parameters so as to enable the drill hole to be positioned in the target stratum layer.
4. A method of filling a coal mine downhole with a solid waste slurry as claimed in claim 3 wherein a measurement system is installed on the directional drill for real time measurement of geological parameters including at least one of resistivity, gamma, porosity, formation density.
5. The method of any one of claims 1-4, wherein the fracturing grouting and the solid waste slurry filling grouting of the target area are performed by using a segmented fracturing filling, and the segmented fracturing filling comprises:
partitioning the goaf after stoping of the working face;
segmenting the target stratum layer where the drilling hole is located based on the subareas to form a plurality of grouting filling sections;
arranging grouting pipes and packers in a borehole, and carrying out fracturing grouting and solid waste slurry filling grouting on a plurality of grouting filling sections section by section from the bottom of the borehole.
6. The method of filling coal mine downhole with solid waste slurry as claimed in claim 5, wherein the fracturing grouting and solid waste slurry filling grouting comprises:
performing fracturing grouting on the grouting filling section to form a fracture network in a rock stratum of the grouting filling section;
performing a simulation test on the solid waste slurry to obtain simulation data;
determining process parameters of the solid waste slurry filling grouting based on the simulation data and the permeability of the grouting filling section;
and filling and grouting the solid waste slurry in the goaf.
7. The method of filling coal mine downhole solid waste slurry of claim 6, wherein the simulation data includes at least one of flowability, permeability and pressure profile.
8. A coal mine underground solid waste slurry filling system for use in the construction of the coal mine underground solid waste slurry filling method as claimed in any one of claims 1 to 7, comprising:
the working chamber is positioned in the adjacent roadway of the working face;
the drilling equipment is arranged in the working chamber and is used for leading a working surface to arrange high-level drilling holes;
the grouting equipment is arranged in the working chamber and is used for carrying out fracturing grouting and solid waste slurry filling grouting after working face extraction.
9. The coal mine downhole solid waste slurry filling system of claim 8, wherein the grouting apparatus comprises a grouting pipe and a packer disposed at an end of the grouting pipe.
10. The underground coal mine waste slurry filling system of claim 8, wherein the grouting equipment comprises a plurality of grouting pumps arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311182811.3A CN117145575A (en) | 2023-09-13 | 2023-09-13 | Underground coal mine solid waste slurry filling method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311182811.3A CN117145575A (en) | 2023-09-13 | 2023-09-13 | Underground coal mine solid waste slurry filling method and system |
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| Publication Number | Publication Date |
|---|---|
| CN117145575A true CN117145575A (en) | 2023-12-01 |
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|---|---|---|---|
| CN202311182811.3A Pending CN117145575A (en) | 2023-09-13 | 2023-09-13 | Underground coal mine solid waste slurry filling method and system |
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| Country | Link |
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| CN (1) | CN117145575A (en) |
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2023
- 2023-09-13 CN CN202311182811.3A patent/CN117145575A/en active Pending
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