CN113062738A - Coal seam excavation method in plane similarity simulation experiment - Google Patents
Coal seam excavation method in plane similarity simulation experiment Download PDFInfo
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- CN113062738A CN113062738A CN202110385109.1A CN202110385109A CN113062738A CN 113062738 A CN113062738 A CN 113062738A CN 202110385109 A CN202110385109 A CN 202110385109A CN 113062738 A CN113062738 A CN 113062738A
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- 239000003245 coal Substances 0.000 title claims abstract description 61
- 238000009412 basement excavation Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004088 simulation Methods 0.000 title claims abstract description 24
- 239000006260 foam Substances 0.000 claims abstract description 61
- 239000000463 material Substances 0.000 claims abstract description 38
- 239000003292 glue Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 7
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 7
- 239000010440 gypsum Substances 0.000 claims abstract description 7
- 239000000976 ink Substances 0.000 claims abstract description 7
- 239000004571 lime Substances 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 claims abstract description 7
- 239000006261 foam material Substances 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 238000002474 experimental method Methods 0.000 claims description 9
- 238000013461 design Methods 0.000 claims description 7
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Remote Sensing (AREA)
- Business, Economics & Management (AREA)
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- Theoretical Computer Science (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses an excavation method of a coal bed in a plane similarity simulation experiment, wherein the coal bed is formed by laying foam boards and similar materials at intervals, and the excavation of the coal bed is simulated by dissolving the foam boards by glue and cutting the similar materials by a cutter and a saw; the foam board is made of EPS foam material; the similar material is prepared by mixing river sand, lime, gypsum, ink and water according to a mixing ratio determined by a proportioning test. According to the excavation method, the foam plate is partially used for replacing similar materials to serve as the simulated coal bed, the foam plate is dissolved by PVC glue to simulate the coal bed excavation, the operation is convenient, the working strength is low, and the working efficiency is improved; the excavation method lays the foam board and similar materials at intervals, solves the problem of 'not mining and sinking firstly' caused by the fact that the foam board is flattened independently, increases the stability of the model, and ensures the experimental effect.
Description
Technical Field
The invention relates to the technical field of similar material simulation experiments, in particular to a coal seam excavation method in a plane similar simulation experiment.
Background
As an important research means, the simulation experiment is proposed by Suiyi expert Kunjinzenzov in the 30 s of the 20 th century and is widely applied to departments of mining industry, geology, water conservancy, geotechnical engineering and the like. The method is mainly used for researching the moving deformation and breaking rule of overlying strata, the earth pressure display rule and the like caused by coal seam excavation in a mining system. Most of the previous similar simulation experiments are plane simulation experiments, and experimental models are scaled according to a certain geometric similarity ratio by geological prototypes.
Coal seam excavation mode in traditional plane analog simulation experiment, not only waste time but also hard, in the gradual excavation in-process, often not excavated the design stride yet, the roof just collapses and gets off and lead to unable continuation excavation, perhaps not excavated inside the model yet, outside roof just collapses, leads to roof collapse, the stratum sinks inside and outside inhomogeneous, asynchronous, and then influences the experiment effect.
Disclosure of Invention
The invention aims to provide a coal bed material and an excavation method in a plane similarity simulation experiment, wherein foam boards and similar materials are paved at intervals to simulate the distribution of a coal bed, the foam boards are used as the coal bed material, the foam boards are dissolved by PVC glue to simulate the excavation of the coal bed, the simulation excavation operation is convenient, the working strength is low, and the working efficiency is improved; the foam board and similar materials are paved at intervals, the problem that the middle rock stratum sinks and is uneven and asynchronous inside and outside is solved, the problem that the foam board is flattened due to the fact that the foam board is used only is solved, and the stability and the reliability of a simulation experiment structure are improved.
The purpose of the invention can be realized by the following technical scheme:
the coal bed is formed by laying foam boards and similar materials at intervals, and the excavation of the coal bed is simulated by dissolving the foam boards with glue and cutting the similar materials with a cutter and a saw.
Further, the foam board is an EPS foam material.
Furthermore, the similar material is prepared by mixing river sand, lime, gypsum, ink and water according to a mixing ratio determined by a proportioning test.
Furthermore, according to mechanical performance parameters such as the compressive strength and the tensile strength of the actual coal seam and the like, the compressive strength and the tensile strength of the simulated coal seam are calculated by combining the experimental similarity ratio (stress similarity ratio), and then the material mixing ratio meeting the stress similarity ratio is determined through a proportioning experiment.
Further, the excavation method comprises the following operation steps:
s1, determining the thickness of the simulated coal seam according to the experimental similarity ratio (geometric similarity ratio), preparing a foam board with the same thickness, and cutting the foam board into strips for later use;
s2, mixing river sand, lime and gypsum according to the mixing proportion determined by the proportioning experiment, and adding water and ink with the mixing weight of 1/10 to prepare a coal bed similar material;
s3, laying the foam boards and the coal seam similar materials on a model frame at intervals;
s4, excavating the coal seam according to the design schedule, dipping glue from the two sides of the model by using brushes to dissolve foams in the foam part;
and S5, excavating the coal seam according to the design schedule, wherein similar material parts are excavated by simultaneously cutting the two sides of the model by using a strip-shaped cutter or a saw.
Further, the width of the foam board is 10-20 cm, and the length of the foam board is the width of the model frame.
Furthermore, the foam boards are placed in the area to be mined of the simulated coal bed in parallel at intervals of 5-10 cm, and the length direction of the foam boards is consistent with the width direction of the model frame.
Further, the glue is PVC-U quick-drying type drainage glue.
Further, the simulated coal seams between the foam boards and outside the foam boards are paved by similar materials.
The invention has the beneficial effects that:
1. the foam board is adopted as the coal bed material, the PVC glue is used for dissolving the foam board to simulate coal bed excavation, the simulated excavation operation is convenient, the working strength is low, and the working efficiency is improved;
2. the excavation method of the invention lays the foam boards and similar materials at intervals, solves the problems of uneven and asynchronous sinking of the middle rock stratum, avoids the problem of 'not mining and sinking before' caused by singly using the foam boards, increases the stability and reliability of the simulation experiment structure and ensures the experiment effect.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic representation of a structural simulation of a coal seam in accordance with the present invention;
FIG. 2 is a schematic representation of a coal seam structure simulation of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for excavating a coal seam in a plane similarity simulation experiment is disclosed, as shown in figures 1 and 2, the coal seam is formed by laying foam boards and similar materials at intervals, the foam boards are dissolved by glue, and the similar materials are cut by a cutter and a saw to simulate the excavation of the coal seam, the foam boards are made of EPS foam materials, and the similar materials are prepared by mixing river sand, lime, gypsum, ink and water according to a mixing ratio determined by a proportioning test.
According to the mechanical performance parameters such as the compressive strength and the tensile strength of the actual coal seam and the experimental similarity ratio (stress similarity ratio), the compressive strength and the tensile strength of the simulated coal seam are calculated, and then the material mixing ratio meeting the stress similarity ratio is determined through a proportioning experiment.
The excavation method comprises the following operation steps:
s1, determining the thickness of the simulated coal seam according to the experimental similarity ratio (geometric similarity ratio), preparing a foam board with the same thickness, and cutting the foam board into strips for later use;
s2, mixing river sand, lime and gypsum according to the mixing proportion determined by the proportioning experiment, and adding water and ink with the mixing weight of 1/10 to prepare a coal bed similar material;
s3, paving foam boards and coal seam similar materials on a model frame at intervals, paving similar materials between the foam boards and a simulated coal seam on the outer side of the foam boards, wherein the foam boards are 10-20 cm in width and 10-10 cm in length, the foam boards are placed in a to-be-mined area of the simulated coal seam in parallel at intervals of 5-10 cm, and the length direction of the foam boards is consistent with the width direction of the model frame;
s4, excavating the coal seam according to the design schedule, dipping glue from two sides of the model by using brushes to dissolve foam in the foam part, wherein the glue is PVC-U quick-drying drainage glue;
and S5, excavating the coal seam according to the design schedule, wherein similar material parts are excavated by simultaneously cutting the two sides of the model by using a strip-shaped cutter or a saw.
The excavation method adopts similar materials to lay and bear the upper pressure at intervals, solves the problems that the foam board cannot bear the pressure of the upper rock stratum and the rock stratum sinks unevenly and asynchronously in the excavation process only by using the foam board as the coal seam in the prior art, utilizes the PVC drainage glue to dissolve the foam board to simulate the coal seam excavation, and improves the excavation working efficiency of the simulation experiment because the foam board is quickly dissolved when meeting the drainage glue.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to 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, the schematic representations of the terms used above do not necessarily refer 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.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (9)
1. The method for excavating the coal bed in the plane similarity simulation experiment is characterized in that the coal bed is formed by paving foam boards and similar materials at intervals, and the excavation of the coal bed is simulated by dissolving the foam boards with glue and cutting the similar materials with a cutter and a saw.
2. The method for excavating a coal seam in a plane simulation experiment according to claim 1, wherein the foam board is made of EPS foam material.
3. The method as claimed in claim 1, wherein the similar material is prepared by mixing river sand, lime, gypsum, ink and water according to a mixing ratio determined by a proportioning test.
4. The method for excavating the coal seam in the plane similarity simulation experiment according to claim 3, characterized in that the compressive strength and the tensile strength of the simulated coal seam are calculated according to mechanical performance parameters such as the compressive strength and the tensile strength of the actual coal seam and by combining the experiment similarity ratio (stress similarity ratio), and then the material mixture ratio meeting the stress similarity ratio is determined through a proportioning experiment.
5. The method for excavating a coal seam in a plane-like simulation experiment according to claim 4, wherein the method comprises the following steps:
s1, determining the thickness of the simulated coal seam according to the experimental similarity ratio (geometric similarity ratio), preparing a foam board with the same thickness, and cutting the foam board into strips for later use;
s2, mixing river sand, lime and gypsum according to the mixing proportion determined by the proportioning experiment, and adding water and ink with the mixing weight of 1/10 to prepare a coal bed similar material;
s3, laying the foam boards and the coal seam similar materials on a model frame at intervals;
s4, excavating the coal seam according to the design schedule, dipping glue from the two sides of the model by using brushes to dissolve foams in the foam part;
and S5, excavating the coal seam according to the design schedule, wherein similar material parts are excavated by simultaneously cutting the two sides of the model by using a strip-shaped cutter or a saw.
6. The method for excavating a coal seam in a plane similarity simulation experiment according to claim 5, wherein the width of the foam board is 10-20 cm, and the length is the width of a model frame.
7. The method for excavating the coal seam in the plane similarity simulation experiment according to claim 5, wherein the foam boards are placed in a region to be mined of the simulated coal seam in parallel at intervals of 5-10 cm, and the length direction of the foam boards is consistent with the width direction of the model frame.
8. The method for excavating a coal seam in a plane similarity simulation experiment according to claim 1, wherein the glue is a PVC-U quick-drying drainage glue.
9. The method of claim 7, wherein the simulated coal seams between the foam boards and outside the foam boards are laid with similar materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110385109.1A CN113062738A (en) | 2021-04-09 | 2021-04-09 | Coal seam excavation method in plane similarity simulation experiment |
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| CN202110385109.1A CN113062738A (en) | 2021-04-09 | 2021-04-09 | Coal seam excavation method in plane similarity simulation experiment |
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| CN202110385109.1A Pending CN113062738A (en) | 2021-04-09 | 2021-04-09 | Coal seam excavation method in plane similarity simulation experiment |
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| CN103527231A (en) * | 2013-11-06 | 2014-01-22 | 中国矿业大学 | Preparation method of analog simulation model used for roadway supporting test |
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| CN105716955A (en) * | 2016-01-20 | 2016-06-29 | 中国石油大学(北京) | Simulation method and model system of rock pressure-sensitive fracture and application of simulation method |
| CN106626620A (en) * | 2010-07-16 | 2017-05-10 | 阿克塞尔集团有限公司 | Composite material and use thereof |
| CN106872668A (en) * | 2017-03-03 | 2017-06-20 | 中国矿业大学(北京) | Temperature seepage stress THM coupling similar test method |
| CN110018291A (en) * | 2019-04-18 | 2019-07-16 | 中国矿业大学 | A kind of filling mining fluid structurecoupling physical simulation experiment test system |
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2021
- 2021-04-09 CN CN202110385109.1A patent/CN113062738A/en active Pending
Patent Citations (6)
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|---|---|---|---|---|
| CN106626620A (en) * | 2010-07-16 | 2017-05-10 | 阿克塞尔集团有限公司 | Composite material and use thereof |
| CN103527231A (en) * | 2013-11-06 | 2014-01-22 | 中国矿业大学 | Preparation method of analog simulation model used for roadway supporting test |
| CN205210083U (en) * | 2015-12-17 | 2016-05-04 | 西安科技大学 | A model for digging up mine similar material simulation experiment excavation |
| CN105716955A (en) * | 2016-01-20 | 2016-06-29 | 中国石油大学(北京) | Simulation method and model system of rock pressure-sensitive fracture and application of simulation method |
| CN106872668A (en) * | 2017-03-03 | 2017-06-20 | 中国矿业大学(北京) | Temperature seepage stress THM coupling similar test method |
| CN110018291A (en) * | 2019-04-18 | 2019-07-16 | 中国矿业大学 | A kind of filling mining fluid structurecoupling physical simulation experiment test system |
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Application publication date: 20210702 |
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