CN118010102B - Disaster early warning method and device for roof micro-deformation and coal stress collaborative monitoring - Google Patents
Disaster early warning method and device for roof micro-deformation and coal stress collaborative monitoring Download PDFInfo
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- CN118010102B CN118010102B CN202410420007.2A CN202410420007A CN118010102B CN 118010102 B CN118010102 B CN 118010102B CN 202410420007 A CN202410420007 A CN 202410420007A CN 118010102 B CN118010102 B CN 118010102B
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012544 monitoring process Methods 0.000 title claims abstract description 32
- 239000011435 rock Substances 0.000 claims abstract description 74
- 239000013307 optical fiber Substances 0.000 claims abstract description 44
- 230000001133 acceleration Effects 0.000 claims abstract description 32
- 230000008859 change Effects 0.000 claims abstract description 24
- 238000005553 drilling Methods 0.000 claims description 26
- 238000013461 design Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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Abstract
The invention provides a disaster early warning method for cooperatively monitoring roof micro-deformation and coal body stress, which relates to the technical field of coal mine safety, and comprises the following steps: acquiring n angular velocity and acceleration data of a section in a stoping roadway corresponding to the thickness center of n layers of rock layers, n optical fiber tensile deformation amounts of n layers of top plates and n coal body stresses of coal layers with different depths; when the target coal body stress of any target coal bed in the n coal body stresses is larger than or equal to the critical stress of the coal bed in which disasters occur on the working face of the coal mine, disaster early warning is carried out; based on n coal body actual stresses of coal beds with different depths when tensile deformation and/or angular velocity and acceleration data of any target stratum generate data change quantity at the top plate of any target layer and coal bed critical stress of disasters of the coal mine working face, whether disaster early warning is carried out or not is determined, therefore, the dangerous degree of the coal body stress of the coal mine working face is effectively judged through collaborative monitoring of the top plate, the rock stratum and the coal bed, and the safety of the coal mine working face is improved.
Description
Technical Field
The invention relates to the technical field of coal mine safety, in particular to a disaster early warning method and device for collaborative monitoring of roof micro-deformation and coal stress.
Background
The stress of the coal and rock mass is an important factor to be considered in the fields of engineering design, construction and operation of mines, rock and soil, bridge tunnels, slopes and the like, and has great significance. The dynamic change process of the ground stress and the stress of the coal rock mass along with the mining engineering is accurately mastered, so that the occurrence mechanism of engineering disasters such as rock burst, coal and gas outburst, water bursting, roof falling and the like can be revealed, and the method has important significance for prediction and prevention of disasters such as dangerous division of mining areas, rock burst, coal and gas outburst, water bursting, roof falling and the like.
In the related art, the stress of the coal and rock mass is usually monitored through a stress sensor, but the stress sensor is limited by stress detection equipment and a detection principle, and the stress sensor is poor in stability and insensitive in monitoring, so that disaster early warning of a coal mine working face cannot be effectively supported, and a more reliable disaster early warning method for collaborative monitoring of the micro deformation of a top plate and the stress of the coal mass is needed.
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 first aim of the invention is to provide a disaster early warning method for cooperatively monitoring the micro deformation of the top plate and the stress of the coal body, which can effectively judge the dangerous degree of the stress of the coal body of the coal mine working face and improve the safety of the coal mine working face through the cooperative monitoring of the top plate, the rock stratum and the coal seam.
The second aim of the invention is to provide a disaster early warning device for cooperatively monitoring the micro deformation of the top plate and the stress of the coal body.
A third object of the present invention is to propose an electronic device.
A fourth object of the present invention is to propose a non-transitory computer readable storage medium storing computer instructions.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a disaster early warning method for collaborative monitoring of roof micro-deformation and coal stress, the method comprising:
Determining a section in a stoping roadway corresponding to a coal mine working face, and acquiring n pieces of angular velocity and acceleration data monitored by a gyroscope arranged at the center of the thickness of the section corresponding to n layers of rock layers, n pieces of optical fiber tensile deformation monitored by distributed optical fibers arranged at the position of a roof corresponding to n layers of sections, and n pieces of coal body stress monitored by a hole multipoint stress meter arranged at the position of the section corresponding to coal layers with different depths;
when the target coal body stress of any target coal bed in the n coal body stresses is larger than or equal to the critical stress of the coal bed in which disasters occur on the coal mine working face, performing disaster early warning on the coal mine working face;
Under the condition that the tensile deformation of the distributed optical fiber at the top plate of any target layer and/or the data change of the angular velocity and acceleration data of any target rock layer are monitored, n actual stresses of coal bodies of coal layers with different depths are monitored through a hole multipoint stress meter when the tensile deformation and/or the data change are generated, so that whether working face disaster early warning is carried out or not is determined based on the actual stresses of the coal bodies and the critical stress of the coal layer, which is disaster-caused by the working face of the coal mine.
In order to achieve the above object, an embodiment of a second aspect of the present invention provides a disaster warning device for cooperatively monitoring micro deformation of a top plate and stress of a coal body, the device comprising:
The acquisition module is used for determining a section in a stoping roadway corresponding to a coal mine working face, acquiring n pieces of angular velocity and acceleration data monitored by a gyroscope installed at the center of the thickness of the layer of rock corresponding to the section, n pieces of optical fiber tensile deformation monitored by distributed optical fibers installed at the position of a roof corresponding to the section, and n pieces of coal body stress monitored by a hole multipoint stress meter installed at the position of the section corresponding to the coal seam with different depths;
the first early warning module is used for carrying out disaster early warning on the coal mine working face when the target coal body stress of any target coal bed in the n coal body stresses is greater than or equal to the target coal bed critical stress of the coal mine working face, wherein the disaster occurs;
The second early warning module is used for monitoring n coal body actual stresses of coal beds with different depths through a hole multipoint stress meter under the condition that the distributed optical fiber at the top plate of any target layer is monitored to generate tensile deformation and/or the angular velocity and acceleration data of any target rock layer generate data change, so as to determine whether to perform disaster early warning of the working surface based on the coal body actual stresses and the critical stress of the coal bed where disasters occur on the working surface of the coal mine.
According to the disaster early warning method, the disaster early warning device, the disaster early warning electronic equipment and the disaster early warning storage medium for the collaborative monitoring of the micro deformation of the top plate and the stress of the coal body, the n angular velocity and acceleration data of the section in the stoping roadway corresponding to the center of the thickness of the n layers of rock layers, the n optical fiber tensile deformation amounts of the n layers of top plates and the n stress of the coal bodies of coal layers with different depths are obtained; when the target coal body stress of any target coal bed in the n coal body stresses is larger than or equal to the critical stress of the coal bed in which disasters occur on the working face of the coal mine, disaster early warning is carried out; based on n coal body actual stresses of coal beds with different depths when tensile deformation and/or angular velocity and acceleration data of any target stratum generate data change quantity at the top plate of any target layer and coal bed critical stress of disasters of the coal mine working face, whether disaster early warning is carried out or not is determined, therefore, the dangerous degree of the coal body stress of the coal mine working face is effectively judged through collaborative monitoring of the top plate, the rock stratum and the coal bed, and the safety of the coal mine working face is improved.
To achieve the above object, an embodiment of a third aspect of the present invention provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect.
To achieve the above object, an embodiment of a fourth aspect of the present invention proposes a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method according to the first aspect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic flow chart of a disaster early warning method for collaborative monitoring of roof micro-deformation and coal stress according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating another embodiment of a disaster warning method for collaborative monitoring of roof micro-deformation and coal stress according to an embodiment of the present invention;
FIG. 3 is a diagram showing an exemplary construction of a coal body stress according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating an exemplary topping and pressure relief according to an embodiment of the present invention;
Fig. 5 is a schematic structural diagram of a disaster early warning device for cooperatively monitoring micro-deformation of a top plate and stress of a coal body according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. 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.
The technical scheme of the invention is to acquire, store, use, process and the like data, which all meet the relevant regulations of national laws and regulations.
The disaster early warning method and the disaster early warning device for cooperatively monitoring the micro-deformation of the top plate and the stress of the coal body are described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a disaster early warning method for collaborative monitoring of roof micro-deformation and coal stress according to an embodiment of the present invention.
As shown in fig. 1, the method comprises the steps of:
And 101, determining a section in a stoping roadway corresponding to a coal mine working face, and acquiring n pieces of angular velocity and acceleration data monitored by a gyroscope arranged at the center of the thickness of a layer of rock corresponding to the section, n pieces of optical fiber tensile deformation monitored by distributed optical fibers arranged at a top plate corresponding to the section, and n pieces of coal body stress monitored by a multi-point stress meter arranged at a hole of a coal seam corresponding to different depths of the section.
In some embodiments, determining a section in the stoping roadway corresponding to the coal mine working face, acquiring n pieces of angular velocity and acceleration data monitored by a gyroscope installed at a center of a layer thickness of n rock layers corresponding to the section, n pieces of optical fiber tensile deformation monitored by a distributed optical fiber installed at a top plate corresponding to the n layers of sections, and n pieces of coal body stress monitored by a hole multipoint stress gauge installed at a coal seam corresponding to different depths of the section; acquiring n angular velocity and acceleration data at the thickness center of n layers of rock layers through gyroscopes installed at the thickness center of each rock layer in a No. 1 drill hole; obtaining n optical fiber stretching deformation amounts of n layers of top plates through each distributed optical fiber installed at each top plate in the No. 2 drilling hole; and obtaining n coal body stresses of the coal beds with different depths by a multi-point hole stress meter arranged at the coal beds with different depths in the No. 3 drilling hole.
Specifically, as shown in fig. 2, 2 through-layer holes may be constructed from the section to the top plate, the holes being required to cover the concerned multi-layer top plate, the holes No. 1 being used for installing gyroscopes, and the holes No. 2 being used for installing distributed optical fibers. And constructing No. 3 drilling holes in coal beds with different depths, wherein the No. 3 drilling holes are provided with a hole multipoint stress meter, the top plate comprises a basic top and a direct top of the coal bed, n layers of top plates are required to be covered by the No. 1 drilling holes and the No. 2 drilling holes, the No. 1 drilling holes are parallel to breaking lines of the top plates of the goaf corresponding to the sections, and the No. 2 drilling holes are perpendicular to the n layers of top plates.
Optionally, as shown in fig. 2, a plurality of gyroscopes are installed in the number 1 drill hole, assuming that the number of drill holes is n, the number of gyroscopes is n, each gyroscope is installed at the center of the thickness of the rock layer, and the gyroscopes can provide signals such as accurate level, position, speed, acceleration and the like, can measure angular speed and acceleration, and indicate the level of abrupt rotation, abrupt sinking and abrupt movement of the top plate. The change of the angular velocity and the acceleration data of the gyroscope is monitored, so that the rock stratum can be judged to be broken, and dynamic load is generated in the coal seam。
Alternatively, as shown in fig. 2, a distributed optical fiber is installed in the full length of the No. 2 drill hole, and the rock stratum is rotationally deformed and sunk from bottom to top, and the rock stratum sunk is formed by taking a bedrock moving line (bedrock moving angle) as a boundary for each layer of rock stratum, and the rock stratum rotationally deformed and sunk, and the rock stratum rotationally sunk generates tiny compression deformation in the lower coal body. Assuming that the number of through-rock layers is n from the coal seam to the drill hole, the deformation and subsidence sequence of the rock layers (from bottom to top) is rock layer 1, rock layer 2 and rock layer 3。
Alternatively, a hole multi-point borehole stress meter may be installed in the coal seam as shown in FIG. 2 to test n coal body stresses to obtain coal seams of different depths.
In other embodiments, the profile of the roof and the pillar and solid coal side of the goaf section are determined according to the profile of the goaf roof in the stope, and the profile of the roof and the pillar and solid coal side is shown in FIG. 2, and the profile of the roof is divided into a profile of the coal body stress caused by static load and a profile of the coal body stress caused by dynamic load superposition when the roof is submerged, wherein the static load is determined by the broken form of the goaf roof, slow sinking of the roof causes slow increase of the static load of the coal body, the dynamic load is caused by sudden break of the roof strata, and the dynamic load causes sudden increase of the stress of the coal body, and the dynamic load is superimposed. Therefore, the change of the stress of the coal body is synchronous with the movement of the top plate, and the time and space have good comparison relation. Eventually, stress concentration zones, plastic zones, and fracture zones are created in the coal body. As shown in fig. 3.
And 102, performing disaster early warning on the coal mine working face when the target coal body stress of any target coal bed in the n coal body stresses is larger than or equal to the critical stress of the coal bed where the disaster occurs on the coal mine working face.
In some embodiments, the higher the coal body stress, the higher the risk. The critical stress of the coal seam with disasters is determined to be according to the actual requirements of the coal mine working faceThe actual stress of the coal body is (target coal body stress)If (if)The coal body is in a safe state, otherwise, the actual stress of any coal body in the n coal body stresses is shownCritical stress of coal seam greater than or equal to disaster occurring on coal mine working faceWhen the system is in a dangerous state, the system is extremely easy to generate engineering disasters, and disaster early warning is carried out on the working face of the coal mine.
And 103, monitoring n actual stresses of coal bodies of coal beds with different depths by a hole multipoint stress meter when the tensile deformation and/or the data change are generated under the condition that the distributed optical fiber at the top plate of any target layer generates the tensile deformation and/or the angular velocity and acceleration data of any target rock layer generate the data change, so as to determine whether to perform disaster early warning of the working surface based on the actual stresses of the coal bodies and the critical stress of the coal bed where disasters occur on the working surface of the coal mine.
In some embodiments, since roof activity is bottom-up, there are three variations of fiber data at the nth layer of rock based on the nth layer angular velocity and acceleration data: 1. the deformation data of the optical fiber is unchanged and stable for a long time, which indicates that the top plate is not sunken and the stress of the coal body is unchanged, and the coal body is in a safe state at the moment; 2. the optical fiber stretching deformation is stable after a period of time, which shows that the roof at the layer is firstly sunk and then stable for a long time, which shows that the stress of the coal body is firstly raised and then tends to be stable, if soThe coal body is in a stable state. 3. The tensile deformation of the optical fiber is continuously increased, which indicates that the top plate is continuously sunk, the stress of the coal body is always increased,Continuous access toAt this time, the coal body is at risk of instability and disaster, and pressure relief measures should be taken at this time. And simultaneously recording the stress variation delta sigma of the multi-point stress meter of one hole in the coal layer when the tensile deformation delta L of each layer of rock stratum is changed. According to the tensile deformation delta L of the distributed optical fibers at each layer of rock layer, not only the dangerous degree of the coal body at the time can be judged, but also the key rock layer position affecting the stress of the coal body can be judged, and the number of roof plates and rock layers affecting the stress of the coal body can be judged.
Further, if the angular velocity and acceleration of the gyroscope at a certain rock horizon suddenly increase, the roof at the horizon suddenly sinks or breaks, and therefore dynamic load is necessarily generated on the coal body, and the stress of the coal body suddenly increases. Since the gyroscope acquires the acceleration change amount, the small change does not cause the data change of the gyroscope, the data change form of the gyroscope is suddenly changed, the data change amount of the gyroscope is recorded as delta W, and then the change is ended, so that the position of the broken rock stratum can be judged based on the data change amount delta W, the number of layers of rock stratum are broken from bottom to top, and the increment of the coal body stress (the stress change amount) delta sigma caused by the breakage of each layer of rock stratum can be judged.
According to the disaster early warning method for collaborative monitoring of the micro deformation of the top plate and the stress of the coal body, n angular velocity and acceleration data of the section in the stoping roadway corresponding to the center of the thickness of n layers of rock layers, n optical fiber stretching deformation amounts of the n layers of top plates and n stress of the coal bodies of coal layers with different depths are obtained; when the target coal body stress of any target coal bed in the n coal body stresses is larger than or equal to the critical stress of the coal bed in which disasters occur on the working face of the coal mine, disaster early warning is carried out; based on n coal body actual stresses of coal beds with different depths when tensile deformation and/or angular velocity and acceleration data of any target stratum generate data change quantity at the top plate of any target layer and coal bed critical stress of disasters of the coal mine working face, whether disaster early warning is carried out or not is determined, therefore, the dangerous degree of the coal body stress of the coal mine working face is effectively judged through collaborative monitoring of the top plate, the rock stratum and the coal bed, and the safety of the coal mine working face is improved.
In addition, in some embodiments, under the condition that disaster early warning of a coal mine working face is determined, determining the dangerous degree of the coal bed and the number of roof and rock strata affecting the coal body stress of the coal beds with different depths according to the tensile deformation amount generated by the distributed optical fibers at the roof of the target layer; under the condition of determining to perform disaster early warning on the coal mine working face, determining the position of the broken rock stratum according to the data variable quantity; and carrying out roof cutting and pressure relief design according to the number of the top plates and the rock stratum and/or the positions of broken rock stratum so as to reduce the coal body stress of the coal beds with different depths.
Further, as shown in fig. 4, a roof-cutting pressure relief design may be directed based on the number of roof, formations and/or locations of broken formations, with the roof-cutting line shown in fig. 4, cutting off the suspended roof affecting the stress of the coal body to achieve the stress relief of the coal body, wherein the roof includes the basic roof and the direct roof of the coal seam.
The roof cutting pressure relief design may include, but is not limited to, coal seam large diameter borehole pressure relief or roof cutting pressure relief, and the embodiment is not particularly limited thereto.
In order to realize the embodiment, the invention also provides a disaster early warning device for cooperatively monitoring the micro deformation of the top plate and the stress of the coal body.
Fig. 5 is a schematic structural diagram of a disaster early warning device for cooperatively monitoring micro-deformation of a top plate and stress of a coal body according to an embodiment of the present invention.
As shown in fig. 5, the disaster warning device 50 for cooperatively monitoring the roof micro-deformation and the coal body stress comprises: an acquisition module 51, a first pre-warning module 52, and a second pre-warning module 53.
The acquisition module 51 is used for determining a section in a stoping roadway corresponding to a coal mine working face, and acquiring n pieces of angular velocity and acceleration data monitored by a gyroscope installed at the center of the thickness of the layer of rock corresponding to the section, n pieces of optical fiber tensile deformation monitored by distributed optical fibers installed at the position of a roof corresponding to the section, and n pieces of coal body stress monitored by a hole multipoint stress meter installed at the position of the coal seam corresponding to different depths;
The first early warning module 52 is configured to perform disaster early warning on a coal mine working face when a target coal body stress of any target coal seam of the n coal body stresses is greater than or equal to a critical stress of the coal seam where a disaster occurs on the coal mine working face;
The second pre-warning module 53 is configured to monitor actual stresses of n coal bodies of coal layers with different depths by using a hole multipoint stress meter when the tensile deformation and/or the data change are generated in the case that the tensile deformation is generated by the distributed optical fiber at the top plate of any target layer and/or the data change is generated by the angular velocity and the acceleration data of any target layer, so as to determine whether to perform disaster pre-warning on the working surface based on the actual stresses of each coal body and the critical stress of the coal layer where disasters occur on the working surface of the coal mine.
Further, in a possible implementation manner of the embodiment of the present invention, the acquiring module 51 is configured to;
Determining a section in a stoping roadway corresponding to a coal mine working face, and carrying out layer-through drilling on n layers of rock strata, n layers of top plates and coal beds with different depths corresponding to the section to obtain a No. 1 drilling hole, a No. 2 drilling hole and a No. 3 drilling hole;
Acquiring n angular velocity and acceleration data at the thickness center of n layers of rock layers through gyroscopes installed at the thickness center of each rock layer in a No. 1 drill hole; obtaining n optical fiber stretching deformation amounts of n layers of top plates through each distributed optical fiber installed at each top plate in the No.2 drilling hole; and obtaining n coal body stresses of the coal beds with different depths by a multi-point hole stress meter arranged at the coal beds with different depths in the No.3 drilling hole.
Further, in one possible implementation manner of the embodiment of the present invention, the No. 1 drill hole is parallel to the breaking line of the goaf roof corresponding to the section.
Further, in a possible implementation manner of the embodiment of the present invention, the apparatus further includes:
The first determining module is used for determining the dangerous degree of the coal bed and the number of roof and rock strata affecting the coal body stress of the coal beds with different depths according to the tensile deformation quantity generated by the distributed optical fibers at the roof of the target layer under the condition of determining the disaster early warning of the coal mine working face;
The second determining module is used for determining the position of the broken rock stratum according to the data variable quantity under the condition of determining to perform disaster early warning on the working face of the coal mine;
And the pressure relief module is used for carrying out roof cutting and pressure relief design according to the number of the top plates and the rock stratum and/or the position of the broken rock stratum so as to reduce the coal body stress of the coal beds with different depths.
According to the disaster early warning device for collaborative monitoring of the micro deformation of the top plate and the stress of the coal body, n angular velocity and acceleration data of the section in the stoping roadway corresponding to the center of the thickness of n layers of rock layers, n optical fiber stretching deformation amounts of the n layers of top plates and n stress of the coal bodies of coal layers with different depths are obtained; when the target coal body stress of any target coal bed in the n coal body stresses is larger than or equal to the critical stress of the coal bed in which disasters occur on the working face of the coal mine, disaster early warning is carried out; based on n coal body actual stresses of coal beds with different depths when tensile deformation and/or angular velocity and acceleration data of any target stratum generate data change quantity at the top plate of any target layer and coal bed critical stress of disasters of the coal mine working face, whether disaster early warning is carried out or not is determined, therefore, the dangerous degree of the coal body stress of the coal mine working face is effectively judged through collaborative monitoring of the top plate, the rock stratum and the coal bed, and the safety of the coal mine working face is improved.
In order to achieve the above embodiment, the present invention further provides an electronic device, including:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the aforementioned method.
To achieve the above embodiments, the present invention also proposes a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the aforementioned method.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present 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 different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
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.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (8)
1. The disaster early warning method for cooperatively monitoring the micro deformation of the top plate and the stress of the coal body is characterized by comprising the following steps:
Determining a section in a stoping roadway corresponding to a coal mine working face, and acquiring n pieces of angular velocity and acceleration data monitored by a gyroscope arranged at the center of the thickness of the section corresponding to n layers of rock layers, n pieces of optical fiber tensile deformation monitored by distributed optical fibers arranged at the position of a roof corresponding to n layers of sections, and n pieces of coal body stress monitored by a hole multipoint stress meter arranged at the position of the section corresponding to coal layers with different depths;
when the target coal body stress of any target coal bed in the n coal body stresses is larger than or equal to the critical stress of the coal bed in which disasters occur on the coal mine working face, performing disaster early warning on the coal mine working face;
Under the condition that the tensile deformation of a distributed optical fiber at the top plate of any target layer and/or the data change of the angular velocity and acceleration data of any target layer are monitored, monitoring the actual stresses of n coal bodies of coal layers with different depths through a hole multipoint stress meter when the tensile deformation and/or the data change are generated, so as to determine whether to perform disaster early warning of the working surface based on the actual stresses of each coal body and the critical stress of the coal layer, which is disaster, of the working surface of the coal mine;
Under the condition of determining disaster early warning of a coal mine working face, determining the dangerous degree of the coal bed and the number of roof and rock strata affecting the coal body stress of the coal beds with different depths according to the tensile deformation quantity generated by the distributed optical fibers at the roof of the target layer;
under the condition of determining to perform disaster early warning on the coal mine working face, determining the position of the broken rock stratum according to the data variable quantity;
And performing roof cutting pressure relief design according to the number of the top plates and the rock strata and/or the positions of broken rock strata so as to reduce the coal body stress of the coal beds with different depths.
2. The method of claim 1, wherein determining a section in the coal mine face corresponding to a stope, obtaining n pieces of angular velocity and acceleration data monitored by gyroscopes installed at a center of a layer of rock thickness corresponding to the section, n pieces of fiber tensile deformation monitored by distributed optical fibers installed at a top plate corresponding to the section, n pieces of coal body stress monitored by a hole multipoint stress gauge installed at a coal seam corresponding to different depths in the section, comprises;
Determining a section in a stoping roadway corresponding to a coal mine working face, and carrying out layer-through drilling on n layers of rock strata, n layers of top plates and coal beds with different depths corresponding to the section to obtain a No. 1 drilling hole, a No. 2 drilling hole and a No. 3 drilling hole;
Acquiring n angular velocity and acceleration data at the thickness center of n layers of rock layers through gyroscopes installed at the thickness center of each rock layer in a No. 1 drill hole; obtaining n optical fiber stretching deformation amounts of n layers of top plates through each distributed optical fiber installed at each top plate in the No.2 drilling hole; and obtaining n coal body stresses of the coal beds with different depths by a multi-point hole stress meter arranged at the coal beds with different depths in the No.3 drilling hole.
3. The method of claim 2, wherein the No. 1 and No. 2 holes are required to cover n layers of top plates, the No. 1 hole is parallel to a breaking line of the goaf top plate corresponding to the section, and the No. 2 hole is perpendicular to the n layers of top plates.
4. Disaster early warning device of roof micro deformation and coal body stress collaborative monitoring, a serial communication port, the device includes:
The acquisition module is used for determining a section in a stoping roadway corresponding to a coal mine working face, acquiring n pieces of angular velocity and acceleration data monitored by a gyroscope installed at the center of the thickness of the layer of rock corresponding to the section, n pieces of optical fiber tensile deformation monitored by distributed optical fibers installed at the position of a roof corresponding to the section, and n pieces of coal body stress monitored by a hole multipoint stress meter installed at the position of the section corresponding to the coal seam with different depths;
The first early warning module is used for carrying out disaster early warning on the coal mine working face when the target coal body stress of any target coal bed in the n coal body stresses is larger than or equal to the critical stress of the coal bed where the disaster occurs on the coal mine working face;
The second early warning module is used for monitoring n coal body actual stresses of coal beds with different depths through a hole multipoint stress meter under the condition that the distributed optical fiber at the top plate of any target layer is monitored to generate tensile deformation and/or the angular velocity and acceleration data of any target layer generate data variation, so as to determine whether to perform working face disaster early warning based on the coal body actual stresses and the critical stress of the coal bed where disasters occur on the working face of the coal mine;
The first determining module is used for determining the dangerous degree of the coal bed and the number of roof and rock strata affecting the coal body stress of the coal beds with different depths according to the tensile deformation quantity generated by the distributed optical fibers at the roof of the target layer under the condition of determining the disaster early warning of the coal mine working face;
The second determining module is used for determining the position of the broken rock stratum according to the data variable quantity under the condition of determining to perform disaster early warning on the working face of the coal mine;
And the pressure relief module is used for carrying out roof cutting and pressure relief design according to the number of the top plates and the rock stratum and/or the position of the broken rock stratum so as to reduce the coal body stress of the coal beds with different depths.
5. The apparatus of claim 4, wherein the acquisition module is configured to, in particular, perform;
Determining a section in a stoping roadway corresponding to a coal mine working face, and carrying out layer-through drilling on n layers of rock strata, n layers of top plates and coal beds with different depths corresponding to the section to obtain a No. 1 drilling hole, a No. 2 drilling hole and a No. 3 drilling hole;
Acquiring n angular velocity and acceleration data at the thickness center of n layers of rock layers through gyroscopes installed at the thickness center of each rock layer in a No. 1 drill hole; obtaining n optical fiber stretching deformation amounts of n layers of top plates through each distributed optical fiber installed at each top plate in the No.2 drilling hole; and obtaining n coal body stresses of the coal beds with different depths by a multi-point hole stress meter arranged at the coal beds with different depths in the No.3 drilling hole.
6. The apparatus of claim 5, wherein the number 1 and number 2 boreholes are required to cover n layers of roof, the number 1 borehole being parallel to a breaking line of the goaf roof corresponding to the section, and the number 2 borehole being perpendicular to the n layers of roof.
7. An electronic device, comprising:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-3.
8. A non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the method of any one of claims 1-3.
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| CN110700883B (en) * | 2019-09-23 | 2022-03-11 | 兖矿新疆矿业有限公司 | Gob-side entry driving prevention and control method for large-dip-angle coal seam composite disaster small coal pillar |
| CN111720165A (en) * | 2020-06-28 | 2020-09-29 | 重庆大学 | Large-dip-angle coal seam gob-side entry retaining flexible entry protection method |
| CN114837662B (en) * | 2022-04-22 | 2022-11-11 | 山东科技大学 | Unloading-splitting-support cooperative scour prevention method based on coal body pressure relief and roof pre-splitting |
| CN116484186B (en) * | 2023-04-13 | 2023-09-08 | 煤炭科学研究总院有限公司 | Multi-field coupling-based rock burst intelligent early warning method and device |
| CN116838342A (en) * | 2023-07-31 | 2023-10-03 | 西安科技大学 | Near-field regulation and control and far-field isolation coal rock dynamic disaster area prevention and control method |
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| CN110992197A (en) * | 2019-10-29 | 2020-04-10 | 天地科技股份有限公司 | Early warning method and system for coal mine roadway deformation |
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