CN114352359B - Method for selecting installation position of mine online ground pressure monitoring equipment - Google Patents
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Abstract
The invention provides a method for selecting the installation position of on-line ground pressure monitoring equipment of a mine, which comprises the steps of establishing a three-dimensional model for mining according to the parameters of the current situation of mining, carrying out simulation calculation on the model by using three-dimensional simulation analysis software, assigning values to the physical and mechanical parameters of ore rocks in each area, carrying out simulation mining according to the parameters of the historical mining process of the mine to obtain the underground stability parameter index of each stage of mining, and finally selecting the installation position of the on-line ground pressure monitoring equipment according to the stability parameter index; the selection principle is that the area has good stability, is close to the active area of the ground pressure activity, and can be effectively detected and monitored in real time. The invention solves the problem that the selection of the installation position of the existing online ground pressure monitoring equipment lacks technical support, can effectively monitor the change condition of underground ground pressure activity, achieves the purpose of forecasting and early warning the ground pressure activity, ensures the safety of underground operation personnel and equipment, and realizes the safe production of mines.
Description
Technical Field
The invention relates to the technical field of mine ground pressure monitoring, in particular to a method for selecting an installation position of mine on-line ground pressure monitoring equipment.
Background
Many mines at home and abroad form more goafs due to higher production capacity requirements and later configuration of filling supporting equipment; if the goaf cannot be filled in time after being formed, the underground safety production is greatly influenced, the formed exposed space creates conditions for rock stratum movement, and the impact waves are extremely easy to generate to seriously threaten the safety of underground personnel and equipment. In order to achieve the overall goal of safe production of mines, an online ground pressure monitoring system must be installed for underground mines with mining depths exceeding 800 m. The non-coal mine mining occupies a very large proportion in the development and utilization of mines, the development force on mining areas is increased day by day in recent years, the safety problem in the mine development process is prominent, a large area of goaf appears at the bottom of a plurality of mines after long-term development, the safety problem of the goaf directly influences the mine safety, and the goaf and an operation area are basically connected together, so that the ground pressure monitoring on the bottom of the mining area is a necessary development trend.
During mining, the dynamic phenomenon of sudden and violent destruction caused by the instantaneous release of the elastic deformation properties of the mine rock mass is called "ground pressure". The occurrence of ground pressure often causes disastrous personal casualties and huge economic losses, and becomes one of the main factors causing major disasters of mines. The mine is provided with online ground pressure monitoring equipment, which is a precaution measure taken before the goaf is effectively treated and potential safety hazards are eliminated to achieve intrinsic safety, and underground potential ground pressure disasters are forecasted and early warned, so that personnel and equipment can be withdrawn in advance, and underground safety accidents caused by the ground pressure disasters are prevented. Nowadays, mine managers have stronger and stronger safety risk awareness, and more mines are provided with online ground pressure monitoring equipment; however, the selection of the installation position of the underground online ground pressure monitoring equipment is always a difficult problem, most mines determine the installation area and the specific installation place according to subjective ideas, certain technical support is lacked, and the selection of the installation position is related to the monitoring effect of the online ground pressure monitoring equipment, so that the safety operation of mines is influenced.
In view of the above, there is a need to design an improved method for selecting an installation location of an online mine ground pressure monitoring device to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for selecting the installation position of on-line ground pressure monitoring equipment of a mine, which is characterized in that a three-dimensional model for mining is established by combining parameters of the current situation of mining to be monitored by ground pressure, and simulation calculation is carried out by utilizing the parameters of the historical mining process of the mine to obtain the underground stability parameter index of each stage of mining; and finally, selecting the installation position of the online ground pressure monitoring equipment according to the stability parameter index. The method solves the problem that the selection of the installation position of the existing underground online ground pressure monitoring equipment lacks technical support, can effectively monitor the change condition of underground ground pressure activity, achieves the aim of forecasting and early warning of ground pressure activity, and ensures the safety of underground operators and equipment.
In order to achieve the aim, the invention provides a method for selecting the installation position of mine online ground pressure monitoring equipment, which comprises the following steps of:
s1, collecting parameters of a historical mining process of a mine to be subjected to earth pressure monitoring and parameters of the current mining situation of the mine;
s2, according to the parameters of the current mining situation collected in the step S1, building a three-dimensional model of mining by adopting three-dimensional modeling software;
s3, exporting the three-dimensional mine mining model obtained in the step S2, inputting the three-dimensional mine mining model into three-dimensional simulation analysis software for simulation calculation, assigning physical mechanical parameters of ore rocks in each area in a command stream mode for the simulation calculation, and performing simulation mining according to the parameters of the mine historical mining process in the step S1 to obtain underground stability parameter indexes of each stage of mine mining;
s4, analyzing and predicting a ground pressure instability area according to the underground stability parameter indexes of the mining stages obtained in the step S3, and selecting the installation position of on-line ground pressure monitoring equipment; the online ground pressure monitoring equipment is arranged in a stable area, and the distance from the edge of the unstable area of ground pressure is 4-8 m.
As a further improvement of the present invention, in step S2, the parameters of the current mining situation of the mine include an actual geological middle section plan, an exploration line section, a surface topography, longitudinal projection drawings of each mine vein and a production ledger of the stope.
As a further improvement of the present invention, in step S2, the building of the three-dimensional mining model specifically includes the following steps:
s21, constructing an ore body and a roadway model according to the actually measured geological middle section plan and the exploratory line profile;
s22, constructing and molding the ground surface of the ore body according to the ground surface topographic map, and combining the ground surface topographic map with the ore body and the roadway model constructed in the step S21 to obtain an integral three-dimensional model of the mine;
s23, cutting the stope in the mine vein according to the longitudinal projection drawing of each mine vein and the recording condition of the production ledger of the stope, so as to facilitate the subsequent simulation of the production process of the stope;
and S24, carrying out grouping and naming on surrounding rocks of upper and lower walls, ore veins, roadways and stopes in the model, and facilitating editing of a subsequent numerical simulation command stream to obtain the three-dimensional model for mining.
As a further improvement of the present invention, in step S1, the parameters of the historical mining process of the mine to be subjected to earth pressure monitoring include the number of underground produced ore vein, development project distribution, stope mining sequence and stope size.
As a further improvement of the present invention, in step S3, the stability parameter indexes include stress concentration phenomenon, displacement and distribution of plastic failure region.
As a further improvement of the present invention, in step S3, the physical and mechanical parameters include uniaxial compressive strength, poisson' S ratio, shear modulus, bulk modulus, tensile strength, cohesion, internal friction angle, and density of the ore body and the surrounding rock.
As a further improvement of the present invention, in step S2, the three-dimensional modeling software is MIDAS GTS NX software.
As a further improvement of the present invention, in step S3, the three-dimensional simulation analysis software is FLAC 3d 5.0 software.
As a further improvement of the present invention, in step S3, a data file derived from the three-dimensional model of mining is subjected To format conversion by using a Midas GTS NX To FLAC 3d 5.0 program, and then input into the three-dimensional simulation analysis software.
As a further improvement of the invention, the indexes of the physical and mechanical parameters are obtained by processing and testing after mine field sampling.
The invention has the beneficial effects that:
1. the invention discloses a method for selecting the installation position of on-line ground pressure monitoring equipment of a mine, which comprises the steps of collecting parameters of a historical mining process of the mine to be subjected to ground pressure monitoring and parameters of the current mining situation, and establishing a three-dimensional mine mining model according to the parameters of the current mining situation; carrying out simulation calculation in three-dimensional simulation analysis software, wherein the simulation calculation adopts a command stream form, carrying out assignment on physical and mechanical parameters of the ore rock in each area, and carrying out simulation mining according to parameters of the historical mining process of the mine to obtain underground stability parameter indexes of each stage of mining; and finally, selecting the installation position of the online ground pressure monitoring equipment according to the underground stability parameter indexes of all stages of mining, wherein the selection principle is an area with good area stability and a distance of 4-8 m from an area with poor stability parameter indexes. The method solves the problem that the selection of the installation position of the existing underground online ground pressure monitoring equipment lacks technical support, can effectively monitor the change condition of underground ground pressure activity, achieves the aim of forecasting and early warning of ground pressure activity, and ensures the safety of underground operators and equipment.
2. The method analyzes and judges the underground place most prone to ground pressure disaster accidents through the stability parameter indexes obtained by simulation, generally carries out online ground pressure monitoring preferentially in the areas with obvious stress concentration phenomenon, large displacement variation and large plastic damage area, and carries out equipment installation in the area with installation conditions by combining the detection distance of online ground pressure monitoring equipment; the installation condition is good, namely the overall stability condition of the installation area is good, ground pressure disaster accident conditions can not occur in a short time, meanwhile, the area with active ground pressure activities is close, and the area which needs real-time monitoring and is embodied in numerical simulation analysis can be effectively detected. The method for selecting the installation position of the on-line ground pressure monitoring equipment is more reasonable, and the change condition of the ground pressure activity can be more effectively monitored; effective measures can be taken for the mine goaf according to the monitoring condition of the equipment for treatment, the accident potential of ground pressure disasters is eliminated, and safe production of mines is realized.
3. According to the method for selecting the installation position of the on-line ground pressure monitoring equipment, a technical method combining actual production and simulation is adopted, a large amount of manpower and material resources are saved, the defect that the installation area and the specific installation place of the installation position of the on-line ground pressure monitoring equipment in most underground mines are determined by subjective ideas is overcome, the rationality of installation of the on-line ground pressure monitoring equipment is improved, the waste of resources is reduced, and the stability and the monitoring use effect of the installed on-line ground pressure monitoring equipment are ensured.
Drawings
Fig. 1 is a schematic flow chart of a method for selecting an installation position of mine online ground pressure monitoring equipment.
Fig. 2 is an overall three-dimensional mesh model of a certain mine in embodiment 1 of the present invention.
Fig. 3 is a numerical simulation mining sequence diagram according to embodiment 1 of the present invention.
Fig. 4 is a maximum principal stress distribution diagram of a stope after simulated stope excavation in example 1 of the present invention.
Fig. 5 is a minimum principal stress distribution diagram of a stope after simulated stope excavation in example 1 of the present invention.
Fig. 6 is a plastic area distribution diagram of a stope after the excavation of a simulated stope in embodiment 1 of the present invention.
Fig. 7 is a Z-direction displacement distribution diagram after simulated stope excavation in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the aspects of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
Further, it is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, a method for selecting an installation position of an online mine ground pressure monitoring device includes the following steps:
s1, collecting parameters of a historical mining process of a mine to be subjected to earth pressure monitoring and parameters of the current mining situation of the mine; the parameters of the historical mining process of the mine comprise the number of underground produced ore veins, the distribution condition of development projects, the mining sequence of a stope and the size of the stope; the parameters of the current mining situation of the mine comprise an actually measured geological middle section plane diagram (comprising underground middle section roadway projects and ore body boundaries), an exploratory line section diagram, an earth surface topographic diagram, a longitudinal projection diagram (comprising stope distribution) of each ore vein and a stope production ledger (comprising the structure and the size of a stope);
s2, according to the parameters of the current mining situation collected in the step S1, establishing a three-dimensional mining model by using MIDAS GTS NX software, and specifically comprising the following steps:
s21, constructing an ore body and roadway model according to the actually measured geological middle section plan and the exploratory line profile;
s22, constructing and molding the surface of the ore body according to the surface topography, and combining the ore body and the roadway model constructed in the step S21 to obtain an integral three-dimensional model of the mine;
s23, cutting the stope in the vein according to the longitudinal projection drawing of each vein and the recording condition of the production ledger of the stope, so as to conveniently simulate the production process of the stope subsequently;
s24, carrying out grouping naming on surrounding rocks, ore veins, roadways and stopes of an upper plate and a lower plate in the model, and facilitating editing of a subsequent numerical simulation command stream to obtain a three-dimensional model for mining;
s3, exporting the three-dimensional mine mining model obtained in the step S2, converting the format of a data file exported from the three-dimensional mine mining model by adopting a Midas GTS NX To FLAC 3D 5.0 program, inputting the data file into three-dimensional simulation analysis software FLAC 3D 5.0 To perform simulation calculation, assigning values To the physical and mechanical parameters of the mine rocks in each area by adopting a command stream form in the simulation calculation, and performing simulated mining according To the parameters of the historical mining process of the mine in the step S1; obtaining underground stability parameter indexes of each stage of mining;
wherein the stability parameter indexes comprise stress concentration phenomenon, displacement and parameter indexes of plastic failure area distribution; the physical and mechanical parameters comprise uniaxial compressive strength, poisson's ratio, shear modulus, volume modulus, tensile strength, cohesive force, internal friction angle and density of ore bodies and surrounding rocks; the indexes of the physical and mechanical parameters are obtained by processing and testing after mine field sampling;
s4, analyzing and predicting a ground pressure instability area according to the underground stability parameter indexes of all stages of mining obtained in the step S3, and selecting the installation position of on-line ground pressure monitoring equipment; the online ground pressure monitoring equipment is arranged in a stable area, the distance from the edge of the unstable area of ground pressure is 4-8 m, and the distance between the online ground pressure monitoring equipment and the unstable area of ground pressure is 35-50 m; the online ground pressure monitoring equipment is uniformly distributed around an unstable area as a center so as to realize an all-around and more effective detection effect.
Specifically, the unstable earth pressure area is an area with obvious stress concentration phenomenon, large displacement change and large plastic damage area compared with the surrounding area, or an area with phenomena of goaf roof collapse, side wall crossing, tunnel roof caving or bottom bulging and the like on site; the selection that possesses the mounted position is that this mounting region overall stability condition is better, can not appear ground pressure disaster accident situation in the short time, and is close from the region that ground pressure activity is active simultaneously, can effectively detect the region that needs real-time supervision who embodies in the numerical simulation analysis.
Particularly, according to the method for selecting the installation position of the on-line ground pressure monitoring equipment for the mine, a three-dimensional model for mining is established by combining the parameters of the current mining situation of the area to be installed, and simulation calculation is performed by using the parameters of the historical mining process of the mine, so that the underground stability parameter index of each stage of mining is obtained; and finally, selecting the installation position of the online ground pressure monitoring equipment according to the stability parameter index. The method solves the problem that the selection of the installation position of the existing underground online ground pressure monitoring equipment lacks technical support, can effectively monitor the change condition of underground ground pressure activity, achieves the aim of forecasting and early warning of ground pressure activity, and ensures the safety of underground operating personnel and equipment.
Example 1
The embodiment provides a method for selecting an installation position of mine online ground pressure monitoring equipment, wherein the size of a certain mine is length (4283 m) multiplied by width (3898 m) multiplied by height (1473 m), and the method for selecting the installation position of the mine online ground pressure monitoring equipment specifically comprises the following steps:
s1, collecting parameters (the number of underground produced ore veins, development project distribution condition, stope mining sequence and stope size) of the historical mining process of a mine and parameters (an actually measured geological middle section plan, an exploration line section diagram, a surface topography, longitudinal projection diagrams of all the ore veins and a stope production ledger) of the current mining situation of the mine;
s2, according to the parameters of the current mining situation collected in the step S1, establishing a three-dimensional mining model by using MIDAS GTS NX software, and specifically comprising the following steps:
s21, constructing an ore body and roadway model according to the actually measured geological middle section plan and the exploratory line profile;
s22, constructing and molding the surface of the ore body according to the surface topography, and combining the ore body and the roadway model constructed in the step S21 to obtain an integral three-dimensional model of the mine;
s23, cutting the stope in the vein according to the longitudinal projection drawing of each vein and the recording condition of the production ledger of the stope, so as to conveniently simulate the production process of the stope subsequently;
s24, carrying out grouping naming on surrounding rocks, ore veins, roadways and stopes of an upper plate and a lower plate in the model, facilitating the editing of a subsequent numerical simulation command stream, and obtaining a three-dimensional model for mining, as shown in FIG. 2;
and S3, exporting the three-dimensional mine mining model obtained in the step S2, converting the format of a data file exported from the three-dimensional mine mining model by adopting a Midas GTS NX To FLAC 3D 5.0 program, inputting the data file into three-dimensional simulation analysis software FLAC 3D 5.0 To perform simulation calculation, assigning values To the physical and mechanical parameters (uniaxial compressive strength, poisson' S ratio, shear modulus, volume modulus, tensile strength, cohesive force, internal friction angle and density of ore bodies and surrounding rocks) of the ore rocks in each area, and performing simulated mining according To the parameters of the historical mining process of the ore rocks in the step S1. As shown in fig. 3, the mining sequence is (1) excavating the 1 st subsection of the ore body on the east and west sides; (2) excavating 2 nd subsections on the east and west sides; (3) excavating a west 3 rd section (excavation history section); (4) excavating a roadway; (5) excavating a 3 rd section on the east side and a 4 th section on the west side; (6) excavating an east 4 th section and a west 5 th section; (7) excavating an east 5 th section and a west 6 th section; (8) excavating an east 6 th section and a west 7 th section; (9) the east side segment 7 was excavated (full excavation). Analyzing various parameters to obtain underground stability parameter indexes (stress concentration phenomenon, displacement and plastic failure area distribution parameter indexes) of all stages of mining;
s4, analyzing and predicting a ground pressure instability area according to the underground stability parameter indexes of the mining stages obtained in the step S3, and selecting the installation position of on-line ground pressure monitoring equipment; the selection principle of the installation position of the online ground pressure monitoring equipment is that the area stability is good, and the distance from the area with poor stability parameter indexes is 4-8 m.
Referring to fig. 4-7, fig. 4 is a maximum principal stress distribution diagram of a stope after a simulated stope excavation in example 1 of the present invention, fig. 5 is a minimum principal stress distribution diagram of a stope after a simulated stope excavation in example 1 of the present invention, fig. 6 is a plastic region distribution diagram of a stope after a simulated stope excavation in example 1 of the present invention, and fig. 7 is a stope after a Z-direction (vertical direction) displacement distribution diagram of a simulated stope excavation in example 1 of the present invention. As can be seen from fig. 4-7, after all the stopes are excavated in sections, the displacement is mainly generated on the first section roof, the maximum sinking displacement is 5.46mm, and the influence on the stopes is small; the plastic zones are small in number, scattered, free of large-area through and small in influence on a stope. Along with continuous downward excavation, the stress of the rock mass at the upper part of the goaf is gradually released and dispersed, and the tensile stress borne by the goaf top plates of the 1 st section and the 2 nd section is gradually reduced and is far less than the tensile strength of the rock mass; the top plates of other sublevel stopes are influenced by gravity to generate compressive stress, but the compressive stress values are all less than the compressive strength of rock mass. Therefore, the online ground pressure monitoring equipment can be installed at the top position of the first sublevel stope according to the case model calculation result.
In conclusion, the invention provides a method for selecting the installation position of the on-line ground pressure monitoring equipment of the mine, which is used for collecting the parameters of the historical mining process of the mine to be monitored by ground pressure and the parameters of the current mining situation and establishing a three-dimensional model of mining according to the parameters of the current mining situation; carrying out simulation calculation in three-dimensional simulation analysis software, wherein the simulation calculation adopts a command stream form, carrying out assignment on physical and mechanical parameters of the ore rock in each area, and carrying out simulation mining according to parameters of the historical mining process of the mine to obtain underground stability parameter indexes of each stage of mining; and finally, analyzing and predicting the unstable area of the ground pressure according to the underground stability parameter indexes of all stages of mining, and selecting the installation position of online ground pressure monitoring equipment, wherein the selection principle is an area with good area stability and 4-8 m distance from the edge of the unstable area of the ground pressure. The method judges the location where the underground ground pressure disaster accident is most likely to happen through the stability parameter index obtained by simulation, generally in the area with obvious stress concentration phenomenon, large displacement variation and large plastic damage area, combines the detection distance of a single ground pressure monitoring sensor, and carries out equipment installation in the area with installation conditions; the installation condition is met, namely the overall stability condition of the installation area is good, the ground pressure disaster accident condition can not occur in a short time, meanwhile, the area with active ground pressure activities is close, and the area which needs real-time monitoring and is embodied in numerical simulation analysis can be effectively detected. The method for selecting the installation position of the on-line ground pressure monitoring equipment is more reasonable, and the change condition of ground pressure activity can be monitored more effectively; effective measures can be taken for treating the mine goaf according to the monitoring condition of the equipment, the accident potential of the ground pressure disaster is eliminated, and the safe production of the mine is realized. The method solves the problem that the selection of the installation position of the existing underground online ground pressure monitoring equipment lacks technical support, can effectively monitor the change condition of underground ground pressure activity, achieves the aim of forecasting and early warning of ground pressure activity, and ensures the safety of underground operation personnel and equipment.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (8)
1. A method for selecting an installation position of mine online ground pressure monitoring equipment is characterized by comprising the following steps:
s1, collecting parameters of a historical mining process and parameters of a current mining situation of a mine to be monitored for ground pressure;
s2, according to the parameters of the current mining situation collected in the step S1, building a three-dimensional model of mining by adopting three-dimensional modeling software; the parameters of the current mining situation of the mine comprise an actually measured geological middle section plane graph, an exploration line section graph, a surface topography graph, longitudinal projection graphs of all mine veins and a production ledger of a stope;
the establishment of the three-dimensional model for mining specifically comprises the following steps:
s21, constructing an ore body and a roadway model according to the actually measured geological middle section plan and the exploratory line profile;
s22, constructing and molding the earth surface of the ore body according to the earth surface topographic map, and combining the earth body and the roadway model constructed in the step S21 to obtain an integral three-dimensional model of the mine;
s23, cutting the stopes in the veins according to the longitudinal projection drawings of the veins and the recording condition of the production ledger of the stopes, so as to facilitate the subsequent simulation of the production process of the stopes;
s24, carrying out grouping naming on surrounding rocks, ore veins, roadways and stopes of an upper plate and a lower plate in the model, so as to facilitate the editing of a subsequent numerical simulation command stream and obtain the three-dimensional model for mining;
s3, exporting the three-dimensional mine mining model obtained in the step S2, inputting the three-dimensional mine mining model into three-dimensional simulation analysis software for simulation calculation, assigning values to physical and mechanical parameters of mine rocks in each area in a command stream mode, and performing simulated mining according to the parameters of the historical mining process of the mine in the step S1 to obtain underground stability parameter indexes of each stage of mine mining;
s4, analyzing and predicting a ground pressure instability area according to the underground stability parameter indexes of all stages of mining obtained in the step S3, and selecting the installation position of on-line ground pressure monitoring equipment; the online ground pressure monitoring equipment is installed in a stable area, the distance from the edge of the unstable ground pressure area is 4-8m, and the distance between the online ground pressure monitoring equipment is 35-50m; the online ground pressure monitoring equipment is uniformly distributed around an unstable area as a center so as to realize omnibearing monitoring.
2. The method for selecting the installation position of the on-line ground pressure monitoring equipment for the mine according to claim 1, wherein in the step S1, the parameters of the historical mining process of the mine to be subjected to ground pressure monitoring comprise the number of underground produced ore vein, development project distribution, stope mining sequence and stope size.
3. The method for selecting the installation position of the mine on-line ground pressure monitoring equipment as claimed in claim 1, wherein in the step S3, the stability parameter indexes comprise parameter indexes of stress concentration, displacement and plastic failure area distribution.
4. The method for selecting the installation position of the mine on-line ground pressure monitoring equipment as claimed in claim 1, wherein in the step S3, the physical and mechanical parameters comprise uniaxial compression strength, poisson' S ratio, shear modulus, bulk modulus, tensile strength, cohesion, internal friction angle and density of the ore body and the surrounding rock.
5. The method for selecting the installation position of the mine online ground pressure monitoring equipment as claimed in claim 1, wherein in the step S2, the three-dimensional modeling software is MIDAS GTS NX software.
6. The method for selecting the installation position of the mine online ground pressure monitoring equipment as claimed in claim 5, wherein in the step S3, the three-dimensional simulation analysis software is FLAC 3D 5.0 software.
7. The method for selecting the installation position of the mine online ground pressure monitoring equipment as claimed in claim 6, wherein a data file derived from the three-dimensional model of mining is subjected To format conversion by using a Midas GTS NX To FLAC 3D 5.0 program and then is input into the three-dimensional simulation analysis software.
8. The method for selecting the installation position of the mine on-line ground pressure monitoring equipment as claimed in claim 4, wherein the indexes of the physical and mechanical parameters are obtained by processing and testing after mine field sampling.
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