CN113803067A - Local rock burst prevention and control device for coal mine - Google Patents
Local rock burst prevention and control device for coal mine Download PDFInfo
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- CN113803067A CN113803067A CN202110931145.3A CN202110931145A CN113803067A CN 113803067 A CN113803067 A CN 113803067A CN 202110931145 A CN202110931145 A CN 202110931145A CN 113803067 A CN113803067 A CN 113803067A
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- 239000003245 coal Substances 0.000 title claims abstract description 38
- 239000011435 rock Substances 0.000 title claims abstract description 32
- 230000002265 prevention Effects 0.000 title claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 113
- 238000005065 mining Methods 0.000 claims abstract description 39
- 238000004364 calculation method Methods 0.000 claims abstract description 20
- 238000004088 simulation Methods 0.000 claims abstract description 18
- 238000004458 analytical method Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims description 26
- 238000010276 construction Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000007405 data analysis Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
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- 238000013461 design Methods 0.000 description 1
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- 238000009826 distribution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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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
- E21F17/18—Special adaptations of signalling or alarm devices
- E21F17/185—Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
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Abstract
The invention discloses a coal mine local rock burst prevention and treatment device, which mainly relates to the technical field of prevention and treatment devices and comprises a drilling machine body, a detector and a control platform, wherein the detector is detachably arranged on the drilling machine body and used for finding out the range and degree of a structural stress zone in a deep part of underground mining or a roadway working face area and establishing an internal strain sensing model; the control platform comprises a theoretical calculation module, a numerical simulation module, a data recording module, a limited analysis module and a control module. The comprehensive coal mine local rock burst prevention and control device integrates the scanning detection, data calculation, data simulation, data analysis and inversion and drilling pressure relief of the deep part or roadway working face of underground mining, so that the preparation work in the early stage of drilling pressure relief is sufficient, the success rate in the later stage of drilling pressure relief is greatly improved, the danger is greatly reduced, and the comprehensive coal mine local rock burst prevention and control device has huge potential social and economic benefits and wide application prospect.
Description
Technical Field
The invention relates to a prevention and control device, in particular to a coal mine local rock burst prevention and control device.
Background
The coal mine rock burst is a dynamic disaster caused by sudden and violent damage of coal rock bodies such as underground roadways, coal pillars and mining working faces of coal mines. After the 21 st century, along with the continuous increase of coal mining depth and the increase of mining intensity in China, the frequency and intensity of rock burst disasters are obviously increased, the number of rock burst mines is obviously increased, and rock burst has become one of the main dynamic disasters threatening the coal mine safety.
As a danger relieving measure for rock burst, pressure relief of drilling is generally regarded as the simplest and practical pressure relief method in a plurality of countries, particularly the most common pressure relief method for large-diameter drilling of coal seams in mines, the design theory of the large-diameter drilling pressure relief technology is that a coal body strength weakening area or a weakening zone is formed in the deep part of a coal body around a roadway by excavating large-diameter drilling, a compensation space is provided for expansion deformation generated in the stress release process of the coal body, and the peak value of supporting pressure is effectively transferred to the deep part of surrounding rocks of the roadway, so that the deformation of the surrounding rocks of the roadway is reduced, and the supporting pressure of the roadway is reduced.
However, the method needs to be constructed underground, is very unfavorable for observation, has high requirements on construction equipment and great construction difficulty, so that theoretical analysis, numerical simulation and analysis are needed before underground construction, an optimal implementation scheme is obtained, and then drilling equipment is used for drilling and pressure relief, but the existing drilling equipment is insufficient in the early preparation working stage, unforeseen sudden conditions are easy to occur in the implementation process, and a good rock burst prevention and control effect cannot be achieved.
Disclosure of Invention
The invention provides a coal mine local rock burst prevention and treatment device, which solves the problem that a comprehensive coal mine local rock burst prevention and treatment device integrating detection, data simulation, data analysis and drilling and unloading in the prior art is lacked.
The technical scheme adopted by the invention for solving the technical problems is as follows: the underground mining stress band detection device comprises a drilling machine body, a detector and a control platform, wherein the detector is detachably arranged on the drilling machine body and is used for finding out the range and degree of a stress band constructed in a deep part or a roadway working face area of underground mining and establishing an internal strain sensing model;
the control platform includes: the theoretical calculation module is used for obtaining a reasonable range of pressure relief drilling parameters under the geological condition of the deep part of underground mining or the roadway working face according to the data transmitted by the detector and the internal strain sensing model;
the numerical simulation module analyzes and verifies the calculation result of the theoretical calculation module from the stress and energy angles, determines the site construction scheme and obtains the corresponding relation between the diameter of the drill hole, the distance between the drill holes, the pressure on the coal body and the pressure relief effect;
the data recording module is arranged on the drilling machine body and records the drilling cuttings amount, high-pressure characteristics and emergency of each meter of drilled hole when the drilling machine body carries out pressure relief drilling;
the limited analysis module inverts rock mechanical parameters by taking the on-site actual measurement mine pressure display rule as a known characteristic value through data recorded by the data recording module, analyzes the pressure relief mechanism of the deep roadway drilling hole, provides a direct evaluation index taking the stress transfer effect and the surrounding rock deformation control effect as the pressure relief effect, and lays a foundation for aligning key parameters for the pressure relief drilling hole again;
the control module is in signal connection with the theoretical calculation module, the numerical simulation module, the data recording module and the limited analysis module, is in remote signal connection with the drilling machine body and is used for controlling the drilling machine body to work.
In order to better realize detection and obtain effective data, the detector comprises a detection module and a walking module, the detection module scans deep parts of underground mining or roadway working face areas on the basis of a drilling pressure relief principle and a distributed optical fiber sensing technology, a strain sensing model in the coal body around a pressure relief drilling hole is established, and the walking module adopts a crawler walking structure.
In order to achieve better pressure relief drilling effect, the drilling machine body is a drilling machine capable of being remotely controlled, the diameter of the drill hole of the drilling machine body in the deep part of underground mining or the roadway working face area is larger than or equal to 95mm, and the distance between the drill holes of the drilling machine body in the deep part of underground mining or the roadway working face area is smaller than or equal to 10 m.
In order to ensure that the pressure relief drilling effect is better, the drilling depth of the drilling machine body in the deep part of underground mining or the working face area of the roadway is 3 times of the mining height of the mining working face, and the drilling depth of the drilling machine body is 4 times of the mining height of the side wall of the roadway.
The invention adopts the structure and has the following advantages:
1. the drilling machine body, the detector and the control platform are arranged, and a comprehensive coal mine local rock burst prevention and control device integrating deep or roadway working face scanning detection, data calculation, data simulation, data analysis and inversion and drilling pressure relief of underground mining is formed, so that the preparation work in the early stage of drilling pressure relief is sufficient, the success rate in the later stage of drilling pressure relief is greatly improved, and the danger is greatly reduced;
2. the relation between the coal seam pressure relief drilling parameters and the coal impact performance and the drilling pressure relief rule under the mining stress evolution condition are deeply researched by means of theoretical calculation, numerical simulation, inversion analysis and the like, the action mechanism of drilling pressure relief is further revealed, and scientific basis can be provided for determination and optimization of the drilling pressure relief time-space parameters of the mine working face;
3. the research result has good universality and applicability, the demand of the research result is increased along with the gradual increase of the coal seam mining depth, the potential social and economic benefits are great, and the application prospect is wide.
Drawings
FIG. 1 is a block diagram of the present invention.
Detailed Description
In order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
As shown in fig. 1, the whole body comprises a drilling machine body, in order to achieve better pressure relief drilling effect, the drilling machine body is a drilling machine which can be remotely controlled, the diameter of a drilling hole of the drilling machine body in the deep part of underground mining or a roadway working face area is more than or equal to 95mm, the drilling distance of the drilling machine body in the deep part of underground mining or the roadway working face area is less than or equal to 10m, in order to achieve better pressure relief drilling effect, the drilling depth of the drilling machine body in the deep part of underground mining or the roadway working face area is 3 times of the mining height, and the drilling depth of the drilling machine body in the roadway working face area is 4 times of the mining height;
during drilling, a drilling machine which is controlled remotely through a control module is used for drilling, pressure relief holes are allowed to be constructed in a low-stress area in a deep part or a roadway working face area of underground mining, drilling is conducted from the low-stress area to a high-stress area, the drilling quantity, high-pressure characteristics and emergency situations of drilling holes per meter are recorded through a data recording module while drilling, large-diameter drilling is required to be drilled in the high-stress area as far as possible, tests show that when the hole diameter of a drilling hole is 300mm, and the distance between every two drilling holes is 1.5-2 m, the coal bed pressure relief effect is good, and when the distance between every two drilling holes is 3m, the pressure relief effect is reduced.
The detector is detachably mounted on the drilling machine body, after the constructor and the drilling machine body reach a deep part of underground mining or a roadway working face area, the detector is detached, a crawler driving motor is started, the detector starts to move within a detection range set by a detection module and is used for finding out the range and the degree of a structural stress band in the deep part of underground mining or the roadway working face area and establishing an internal strain sensing model, in order to better realize detection and obtain effective data, the detector comprises the detection module and a walking module, the detection module is based on a drilling pressure relief principle and a distributed optical fiber sensing technology, the deep part of underground mining or the roadway working face area is scanned, the internal strain sensing model of a coal body around a pressure relief drill hole is established, and the pressure relief effect is evaluated by taking an optical fiber tensile strain value and a pressure relief radius as indexes; the walking module adopts a crawler walking structure, the crawler walking structure comprises a shell, a crawler and a crawler driving motor, the crawler is arranged below the shell, and the crawler driving motor drives the crawler to run;
the control platform includes: the theoretical calculation module obtains a reasonable range of pressure relief drilling parameters under the geological condition of the deep part or the roadway working face of underground mining, such as the pressure relief radius range of pressure relief drilling holes with different apertures, according to the data transmitted by the detector and the internal strain sensing model by using a theoretical calculation method, and is matched with the numerical simulation module to carry out deep research on the parameter range obtained by theoretical calculation by using a numerical simulation method so as to obtain an optimized scheme of the pressure relief drilling holes under the geological condition;
the numerical simulation module analyzes and verifies the calculation result of the theoretical calculation module from the stress and energy angles, determines the site construction scheme and obtains the corresponding relation between the diameter of the drill hole, the distance between the drill holes, the pressure on the coal body and the pressure relief effect;
numerical simulation module application FLAC3DPerforming simulation calculation by software, verifying the result calculated by the theoretical calculation module, obtaining a stress-strain curve of the coal sample by combining the verification result, obtaining the relation between the drilling hole parameters and the coal impact performance index, namely obtaining the corresponding relation between the drilling hole diameter, the drilling hole spacing, the pressure borne by the coal body and the pressure relief effect, and selecting the construction scheme of the pressure relief drilling hole in site construction according to the obtained numerical parameters and the corresponding relation;
the data recording module is arranged on the drilling machine body and records the drilling cuttings amount, high-pressure characteristics and emergency situations of each meter of drilled hole when the drilling machine body carries out pressure relief drilling, and the records provide reference values for subsequent analysis and the pressure relief drilling again;
the limited analysis module inverts rock mechanical parameters by taking the on-site actual measurement mine pressure display rule as a known characteristic value through data recorded by the data recording module, analyzes the pressure relief mechanism of the deep roadway drilling hole, provides a direct evaluation index taking the stress transfer effect and the surrounding rock deformation control effect as the pressure relief effect, and lays a foundation for aligning key parameters for the pressure relief drilling hole again;
finite analysis module, using FLAC3DSoftware establishes a deep or tunnel drilling pressure relief model for underground mining according to data transmitted by the detector, and performs pressure relief on the drilling before and afterThe distribution rule and deformation damage characteristics of the surrounding rock of the roadway are analyzed, and the module is used for analyzing the FLAC3DThe software is developed secondarily, the in-situ actual measurement ore pressure display rule is used as a known characteristic value, rock mechanical parameters are inverted, the deep roadway drilling pressure relief mechanism can be analyzed, the stress transfer effect and the surrounding rock deformation control effect are used as direct evaluation indexes of the pressure relief effect, the dynamic action rule of the pressure relief drilling parameters on the stability of the surrounding rock of the deep roadway is systematically researched, and the optimal determination method of each key parameter influencing the pressure relief effect is provided;
the control module is in signal connection with the theoretical calculation module, the numerical simulation module, the data recording module and the limited analysis module, is in remote signal connection with the drilling machine body and is used for controlling the drilling machine body to work;
after the numerical simulation module determines the field construction scheme, signals are transmitted to the control module, the control module controls the drilling machine body to carry out pressure relief drilling construction according to the determined construction scheme, the data recording module records the whole process in the construction process and transmits the recorded data to the limited analysis module, and the limited analysis module carries out inversion analysis according to the parameters of the construction and some emergency situations to obtain how to better propose each key parameter influencing the pressure relief effect for subsequent improvement and use;
in addition, after a drilling pressure relief mechanical model is established in the finite analysis module for theoretical analysis, FLAC can be used3DAnd (3) carrying out numerical simulation by software, and analyzing whether the arrangement of the pressure relief drill holes in the coal blocks can influence the impact performance of the coal or not so as to carry out deep research on the relationship between the construction parameters of the pressure relief drill holes and the related indexes of the impact performance of the coal in the following process.
Wherein, the caterpillar track driving motor and the FLAC3DSoftware is the prior art.
The above-described embodiments should not be construed as limiting the scope of the invention, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (4)
1. The utility model provides a local rock burst prevention and cure device in colliery, includes the rig body, its characterized in that: the underground mining stress band construction system further comprises a detector and a control platform, wherein the detector is detachably arranged on the drilling machine body and used for finding out the range and degree of the stress band constructed in the deep part of underground mining or the roadway working face area and establishing an internal strain sensing model;
the control platform comprises: the theoretical calculation module is used for obtaining a reasonable range of pressure relief drilling parameters under the geological condition of the deep part of underground mining or the roadway working face according to the data transmitted by the detector and the internal strain sensing model;
the numerical simulation module analyzes and verifies the calculation result of the theoretical calculation module from the stress and energy angles, determines the field construction scheme and obtains the corresponding relation between the diameter of the drill hole, the distance between the drill holes, the pressure on the coal body and the pressure relief effect;
the data recording module is arranged on the drilling machine body and records the drilling cuttings amount, high-pressure characteristics and emergency of each meter of drilled hole when the drilling machine body carries out pressure relief drilling;
the limited analysis module inverts rock mechanical parameters by taking an on-site actual measurement mine pressure display rule as a known characteristic value through the data recorded by the data recording module, analyzes a deep roadway drilling pressure relief mechanism, provides a direct evaluation index taking a stress transfer effect and a surrounding rock deformation control effect as a pressure relief effect, and lays a foundation for accurately finding key parameters for pressure relief drilling again;
the control module is in signal connection with the theoretical calculation module, the numerical simulation module, the data recording module and the limited analysis module, and the control module is in remote signal connection with the drilling machine body and is used for controlling the drilling machine body to work.
2. The coal mine local rock burst control device according to claim 1, characterized in that: the detector comprises a detection module and a walking module, wherein the detection module scans deep parts of underground mining or roadway working face areas on the basis of a drilling pressure relief principle and a distributed optical fiber sensing technology, and establishes a strain sensing model in the coal body around a pressure relief drill hole, and the walking module adopts a crawler walking structure.
3. The coal mine local rock burst control device according to claim 2, characterized in that: the drilling machine body is a drilling machine capable of being remotely controlled, the diameter of a drill hole of the drilling machine body in a deep part or a roadway working face area of underground mining is larger than or equal to 95mm, and the distance between the drill holes of the drilling machine body in the deep part or the roadway working face area of underground mining is smaller than or equal to 10 m.
4. The coal mine local rock burst control device according to claim 3, characterized in that: the drilling depth of the drilling machine body in the deep part of underground mining or the working face area of the roadway is 3 times of the mining height of the mining working face, and the drilling depth of the drilling machine body is 4 times of the mining height of the side wall of the roadway.
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| CN202110931145.3A CN113803067B (en) | 2021-08-13 | 2021-08-13 | Colliery local rock burst prevention and cure device |
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| CN202110931145.3A CN113803067B (en) | 2021-08-13 | 2021-08-13 | Colliery local rock burst prevention and cure device |
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Cited By (1)
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| US11492891B1 (en) * | 2022-02-16 | 2022-11-08 | Liaoning University | Method and apparatus of controlling drilling for rock burst prevention in coal mine roadway |
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