LU500659B1 - Method for evaluating geological dynamic environment of mine - Google Patents
Method for evaluating geological dynamic environment of mine Download PDFInfo
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- LU500659B1 LU500659B1 LU500659A LU500659A LU500659B1 LU 500659 B1 LU500659 B1 LU 500659B1 LU 500659 A LU500659 A LU 500659A LU 500659 A LU500659 A LU 500659A LU 500659 B1 LU500659 B1 LU 500659B1
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000011156 evaluation Methods 0.000 claims abstract description 55
- 238000005065 mining Methods 0.000 claims abstract description 36
- 239000003245 coal Substances 0.000 claims abstract description 16
- 239000011435 rock Substances 0.000 claims abstract description 11
- 230000002265 prevention Effects 0.000 claims abstract description 9
- 238000013349 risk mitigation Methods 0.000 claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 3
- 238000010606 normalization Methods 0.000 claims abstract 2
- 230000000694 effects Effects 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 abstract description 2
- 239000011241 protective layer Substances 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V20/00—Geomodelling in general
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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Abstract
A method for evaluating a geologic dynamic environment of a mine belonging to the technical field of coal mining. The method includes: step 1, constructing an evaluation index system for the geological dynamic environment, and selecting eight factors including a geomorphic condition of a structural depression, a vertical movement condition of a fault block structure, a horizontal movement condition of the fault block structure, an influence range of a fracture structure, a structural stress, a mining depth of a coal seam, a condition of a hard rock overlying stratum and a criterion condition for a dynamic disaster occurring in a region and an adjacent region as evaluation indexes of a target mine respectively; step 2, dividing various evaluation index values ai into four categories, a corresponding evaluation index value ai being 0 when one index has no influence on a geological dynamic environment of the mine, a corresponding evaluation index value ai being 1 when an influence degree is weak, a corresponding evaluation index value ai being 2 when the influence degree is moderate, and a corresponding evaluation index value ai being 3 when the influence degree is strong; step 3, evaluating the target mine according to the various indexes one by one to acquire the various evaluation index values ai , and summing various evaluation index values ai to acquire a comprehensive evaluation index value A of the geological dynamic environment of the mine; step 4, carrying out normalization processing on the comprehensive evaluation index value A of the geological dynamic environment of the mine to obtain an evaluation index value n of the geological dynamic environment of the target mine; and step 5, carrying out stoping normally when the index value n being 0-0.25 indicates that the mine does not have a geological dynamic environment for a mine dynamic disaster; taking a proper local risk mitigation measure in a mining process when the index value n being 0.25-0.50 indicates that the mine has a geologic dynamic environment for a weak dynamic disaster; taking prevention measures including regional monitoring and early warning, detection and local risk mitigation measures before mining when the index value n being 0.50-0.75 indicates that the mine has a geologic dynamic environment for a medium dynamic disaster and a possibility of occurrence is further increased; and designing a reasonable mining and development roadway arrangement in advance, identifying a coal seam impact tendency, grasping ground stress distribution characteristics to exploit the mine, mining a protective layer for the mine with a mining protection layer regional anti-impact condition, and taking "four in one" prevention measures including regional monitoring and early warning, detection, local risk mitigation, and protection measures in the mining process when the index value n being 0.75-1.0 indicates that the mine has a geologic dynamic environment for a strong dynamic disaster.
Description
BL-5297
METHOD FOR EVALUATING GEOLOGICAL DYNAMIC ENVIRONMENT OF MINE 20%
[01] The present disclosure belongs to the technical field of coal mining, and particularly relates to a method for evaluating a geological dynamic environment of a mine.
[02] The geological dynamic environment of the mine is used for evaluating the structural characteristics, movement characteristics and stress characteristics of the regional geological body where the coal mine is located. Generally, the type of the geological dynamic environment of the fault block where the human engineering is located can be determined in advance according to the geological structure form, stress conditions, etc. of the regional geological body. According to the theory of geological dynamic division, the occurrence of mine dynamic disasters such as rock burst must have the corresponding geological dynamic environment, which is the result of natural geological dynamic conditions interacting with engineering disturbance conditions. Only with the geological dynamic environment of mine dynamic disasters, can mine dynamic disasters occur under the influence of human engineering activities. It can be said that the geological dynamic environment is the indispensable condition for mine dynamic disasters, and the mining disturbance is the sufficient condition.
[03] In the geological dynamic environment, there are a number of factors influencing the mine dynamic disasters in the geological body of mine engineering, including fault block structure movement conditions of the coal region, structure geomorphic conditions, structural stress conditions, fracture structure conditions, coal mining depth conditions, hard rock overlying stratum conditions, criterion conditions of local regions and adjacent regions, coal and rock medium conditions, surrounding rock structure conditions, water content conditions of coal and rock mass, gas, temperature and seepage conditions, etc. Due to the difference of regional geological dynamic environments where different mines are located, the main control factors of mine dynamic disasters are different, resulting in different intensity of mine dynamic disasters.
[04] The research object of the method for evaluating the geological dynamic environment of the mine is the geological body of mine engineering, which involves the factors of the natural earth system and mining engineering activities, thereby providing geological environment information for mine mining engineering activities and predicting the geological dynamic effects possibly generated by engineering activities. On the basis of the relation and interaction between the determined factors influencing the geological dynamic environment and mining engineering activities, the method reveals the induction and occurrence process and development law of the mine dynamic disasters in 1
BL-5297 the geologic body of mine engineering, evaluates its risk and the damage loss to mine mining. and 0 puts forwards the prevention solution. The method for evaluating the geological dynamic environment of the mine defines the geological dynamic environment and dynamic conditions of mine dynamic disasters in the geological body of mine engineering from a macro perspective, thereby providing a new idea and method for the evaluation and prediction of newly-built mines and mine dynamic disasters such as rock burst of new mining level of the mines, and providing a theoretical basis for the prediction and prevention of the risk of the mine dynamic disasters.
[05] The method for evaluating the geological dynamic environment of the mine can be used for determining whether the geological body of mine engineering has the mine geological dynamic environment for mine dynamic disasters in advance. Moreover, the method can explain why mine dynamic disasters never occur in some mining regions, but frequently occur in some other mining regions. It can be said that when the mine has the geological dynamic environment for the mine dynamic disasters, mine dynamic disasters may occur in the process of roadway driving or working face mining. When the mine does not have such a geological dynamic environment, only when the mining engineering activities promote the redistribution and concentration of stress and energy of the coal and rock mass to reach the critical conditions for the occurrence of mine dynamic disasters, mine dynamic disasters will be induced by mining.
[06] There is the geological dynamic environment of the mine objectively in the mining engineering region of the mine, the geological dynamic environment of different mines in different mining regions is different, and the influence factors and main control conditions (geological dynamic conditions) of different geological dynamic environments are also different, resulting in different types of geological dynamic environments. Safety production of the mine is under guidance of how to select the evaluation index of the geological dynamic environment of the mine to establish the evaluation index system of geological dynamic environment conditions, thereby analyzing and quantitatively evaluating the geological dynamic environment of the mine so as determine the type and strength characteristics of the geological dynamic environment of the mine.
[07] Evaluation index system for geological dynamic environment of mine
[08] There are a number of factors influencing a geological dynamic environment of a mine, and accordingly a general index with universal applicability should be selected for an evaluation of the geological dynamic environment. By means of an analysis of the geological dynamic environment of coal mining in China, a result shows that the mine is generally located in a region with strong crustal block activity (vertical movement and horizontal movement), has typical geomorphic characteristics (structural depression), and is controlled by some large geological structural fractures 2
BL-5297 or mine faults. From the analysis of the geological dynamic environment of a geological body of > mine engineering, the mine is generally under a condition of a structural stress field, which has a characteristic of high stress concentration. Moreover, with an increase of a mining depth of a coal seam, an intensity and a frequency of a mine dynamic disaster tend to increase. A thickness characteristic of a roof rock has an important influence on coal mining. Moreover, whether there has been the mine dynamic disaster in an adjacent region of the mine is an important reference index.
[09] Therefore, eight indexes including a geomorphic condition of the structural depression, a vertical movement condition of a fault block structure, a horizontal movement condition of the fault block structure, an influence range of a fracture structure, a structural stress, a mining depth of the coal seam, a condition of a hard rock overlying stratum and criterion conditions of a region, the adjacent region, etc. are selected for evaluating the geological dynamic environment of the mine.
[10] With respect to the eight indexes for evaluating a geological dynamic environment of a mine, according to an influence and a control degree of each index on the geological dynamic environment of the mine, the regional geological dynamic environment of the mine is quantitatively evaluated, various evaluation index values “ are divided into four categories, a corresponding evaluation index value % is 0 when one index has no influence on the geological dynamic environment of the mine, a corresponding evaluation index value 4 is 1 when an influence degree is weak, a corresponding evaluation index value 4 is 2 when the influence degree is moderate, and a corresponding evaluation index value 4 is 3 when the influence degree is strong. According to evaluation results of the various evaluation index values Ÿ, a comprehensive evaluation index value 4 of the geological dynamic environment of the mine may be acquired, which is seen in equation 1.
A=$ a,
[11] = (1)
[12] In the equation, 4 is a comprehensive evaluation index of the geological dynamic environment and has a value range of 0-31;
[13] is the number of the evaluation index; and
[14] 4 is an evaluation index (0-3) of each geological dynamic condition, ‘=1, 2...
[15] It shows that the mine is not influenced by the geological dynamic environment when the comprehensive evaluation index value À is 0, and that the mine is influenced the most acutely by the geological dynamic environment when the comprehensive evaluation index value À is 37.
Normalized dimensionless processing is carried out according to the comprehensive evaluation index value À, such that a normalized result of the comprehensive evaluation index value is (0-1), and the normalized result À is represented by N, which is seen in equation 2. 3
BL-5297
A LU500659 ne] 3 @
[17] In the equation, N is an evaluation index value of the geological dynamic environment, and has the value range of 0-1.
[18] An evaluation index system for the geological dynamic environment of a mine is established according to an evaluation index of the geological dynamic environment, which is shown as FIG 1.
[19] Evaluation of geological dynamic environment of mine
[20] A type of a dynamic disaster of the mine may be evaluated according to the normalized result N of the comprehensive evaluation index value of the geological dynamic environment, thereby providing guidance for mine design and mining work. The evaluation index is seen in table 1.
[21] Table 1 Evaluation index for type of geological dynamic environment of mine environment
[22] (1) Stoping may be carried out normally when the comprehensive evaluation index value n of the geological dynamic environment of the mine being 0-0.25 indicates that the mine does not have a geological dynamic environment with a mine dynamic disaster;
[23] (2) A proper local risk mitigation measure should be taken in a mining process when the comprehensive evaluation index value N of the geological dynamic environment of the mine being 0.25-0.50 indicates that the mine has a geologic dynamic environment for a weak dynamic disaster;
[24] (3) Prevention measures including regional monitoring and early warning, detection and local risk mitigation measures should be taken before mining when the comprehensive evaluation index value N of the geological dynamic environment of the mine being 0.50-0.75 indicates that the mine has a geologic dynamic environment for a medium dynamic disaster and a possibility of occurrence is further increased; and
[25] (4 when the comprehensive evaluation index value N of the geological dynamic environment of the mine being 0.75-1.0 indicates that the mine has a geologic dynamic environment for a strong dynamic disaster, to exploit the mine, a reasonable mining and 4
BL-5297
. . . LU500659 development roadway arrangement should be designed in advance, a coal seam impact tendency is identified, ground stress distribution characteristics are grasped, and for the mine with a mining protection layer regional anti-impact condition, a protective layer should be mined, and “four in one” prevention measures including regional monitoring early warning, detection, local risk mitigation and protection measures should be taken in the mining process.
Claims (1)
1. A method for evaluating a geologic dynamic environment of a mine, comprising: step 1, constructing an evaluation index system for the geological dynamic environment, and selecting a geomorphic condition of a structural depression, a vertical movement condition of a fault block structure, a horizontal movement condition of the fault block structure, an influence range of a fracture structure, a structural stress, a mining depth of a coal seam, a condition of a hard rock overlying stratum and a criterion condition for a dynamic disaster occurring in a region and an adjacent region as evaluation indexes of a target mine; step 2, dividing various evaluation index values % into four categories, a corresponding evaluation index value 2 being 0 when one index has no influence on the geological dynamic environment of the mine, a corresponding evaluation index value a; being 1 when an influence degree is weak, a corresponding evaluation index value a; being 2 when the influence degree is moderate, and a corresponding evaluation index value a; being 3 when the influence degree is strong; step 3, evaluating the target mine according to the various indexes one by one to acquire various evaluation index values % and summing the various evaluation index values ai to acquire a comprehensive evaluation index value 4 of the geological dynamic environment of the mine; step 4, carrying out normalization processing on the comprehensive evaluation index value 4 of the geological dynamic environment of the mine to acquire an evaluation index value n of the geological dynamic environment of the target mine; and step 5, carrying out stoping normally when the index value being 0-0.25 indicates that the mine does not have a geological dynamic environment for a mine dynamic disaster; taking a proper local risk mitigation measure in a mining process when the index value being 0.25-0.50 indicates that the mine has a geologic dynamic environment for a weak dynamic disaster; taking a prevention measure when the index value being 0.50-0.75 indicates that the mine has a geologic dynamic environment for a moderate dynamic disaster; and taking “four in one” comprehensive prevention measures, and taking a regional and local combined prevention technology, including monitoring and early warning, risk mitigation, effect inspection, safety protection measures, and the like when the index value being 0.75-1.0 indicates that the mine has a geologic dynamic environment for a strong dynamic disaster and a dynamic disaster is induced by a mining engineering activity. 6
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| LU500659A LU500659B1 (en) | 2021-09-15 | 2021-09-15 | Method for evaluating geological dynamic environment of mine |
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| LU500659A LU500659B1 (en) | 2021-09-15 | 2021-09-15 | Method for evaluating geological dynamic environment of mine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117495595A (en) * | 2024-01-02 | 2024-02-02 | 北京中矿大地地球探测工程技术有限公司 | Intelligent monitoring and early warning method and system for mine geological environment |
| CN117610945A (en) * | 2024-01-24 | 2024-02-27 | 四川省华地建设工程有限责任公司 | Complex mountain area geological disaster risk evaluation method and system based on artificial intelligence |
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2021
- 2021-09-15 LU LU500659A patent/LU500659B1/en active IP Right Grant
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117495595A (en) * | 2024-01-02 | 2024-02-02 | 北京中矿大地地球探测工程技术有限公司 | Intelligent monitoring and early warning method and system for mine geological environment |
| CN117495595B (en) * | 2024-01-02 | 2024-03-15 | 北京中矿大地地球探测工程技术有限公司 | Intelligent monitoring and early warning method and system for mine geological environment |
| CN117610945A (en) * | 2024-01-24 | 2024-02-27 | 四川省华地建设工程有限责任公司 | Complex mountain area geological disaster risk evaluation method and system based on artificial intelligence |
| CN117610945B (en) * | 2024-01-24 | 2024-04-05 | 四川省华地建设工程有限责任公司 | Complex mountain area geological disaster risk evaluation method and system based on artificial intelligence |
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