CN116556950A - Intelligent optimization method for primary roof caving deep hole blasting parameters of hard roof - Google Patents
Intelligent optimization method for primary roof caving deep hole blasting parameters of hard roof Download PDFInfo
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- CN116556950A CN116556950A CN202211502287.9A CN202211502287A CN116556950A CN 116556950 A CN116556950 A CN 116556950A CN 202211502287 A CN202211502287 A CN 202211502287A CN 116556950 A CN116556950 A CN 116556950A
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- 238000005422 blasting Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000005457 optimization Methods 0.000 title claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 36
- 238000005065 mining Methods 0.000 claims abstract description 31
- 230000003313 weakening effect Effects 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 22
- 238000011156 evaluation Methods 0.000 claims abstract description 15
- 238000010276 construction Methods 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 9
- 239000011435 rock Substances 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 13
- 208000008918 voyeurism Diseases 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 10
- 208000010392 Bone Fractures Diseases 0.000 claims description 9
- 206010017076 Fracture Diseases 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 244000144985 peep Species 0.000 claims description 6
- 238000011161 development Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 claims 5
- 238000013461 design Methods 0.000 abstract description 8
- 238000004364 calculation method Methods 0.000 abstract description 4
- 238000013139 quantization Methods 0.000 abstract description 3
- 238000007600 charging Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The invention discloses an intelligent optimization method for blasting parameters of a primary roof caving deep hole of a hard roof. The method comprehensively considers the conditions of the coal bed and the occurrence condition of the top plate, designs deep hole blasting parameters according to the blasting weakening mechanism and the mining pressure action mechanism and by combining the underground construction environment and the safety guarantee conditions, and has operability, pertinence and reliability. According to the method, the continuous discontinuous numerical calculation method is adopted to simulate the optimized blasting parameters, so that the continuous discontinuous characteristics of the coal bed and the roof strata are considered, the blasting weakening mechanism and the ore pressure action mechanism can be realized, the damage degree of the roof strata under different blasting weakening parameters can be effectively obtained, and the weakening effects of different blasting parameters are evaluated through the quantization indexes. The method can further dynamically optimize blasting parameters in site construction, follow-up evaluation of the weakening effect of primary mining top-setting deep hole blasting, reduce safety risk and ensure safe and efficient propulsion of the working surface.
Description
Technical Field
The invention relates to the technical field of primary roof caving deep hole blasting of a hard roof, in particular to an intelligent optimization method for parameters of primary roof caving deep hole blasting of a hard roof.
Background
The method solves the problem of primary roof caving of the hard roof and has important significance for realizing safe coal exploitation. At present, the primary roof caving mainly comprises methods such as hydraulic fracturing, carbon dioxide blasting, gas generating agent blasting, deep hole blasting and the like, and the deep hole blasting is the simplest, most direct and most effective means for controlling the primary roof caving operation of a hard roof, and has been popularized and applied in many coal mines in mountain western, inner Mongolia, shaanxi, sichuan and the like. The basic principle is that a large number of cracks and kerf surfaces are generated in the hard rock stratum by means of drilling, charging and blasting, the strength and energy conditions of the hard roof for generating strong mine pressure are changed, the overall stability of the rock stratum is reduced, and the suspended roof length of the working surface is reduced. The method is characterized in that the determination of the primary roof caving deep hole blasting parameters of the hard roof mainly depends on experience, the deep hole blasting parameters cannot be determined rapidly, accurately and intelligently according to different coal seam conditions, roof occurrence conditions and construction environments, and the intelligent optimization method for the primary roof caving deep hole blasting parameters of the hard roof is urgently needed at present, the primary roof caving operation of a working face is guided, and technical support is provided for safe and efficient stoping of the working face.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides an intelligent optimization method for the primary roof caving deep hole blasting parameters of a hard roof.
The invention provides an intelligent optimization method for blasting parameters of a primary roof caving deep hole of a hard roof, which comprises the following steps:
obtaining key parameters of each horizon rock stratum according to physical and mechanical parameters of the coal bed and roof rock stratum and a downhole drilling peeping result;
determining the weakening range of the top of the primary mining by utilizing a blasting weakening mechanism and an ore pressure action mechanism and combining the coal bed conditions and the occurrence condition of the top plate;
under the condition of guaranteeing the safety of downhole construction of the blastholes, the parameters of the blastholes of the initial mining roof-setting deep hole blasting of the hard top plate are designed;
simulating the weakening effect of the roof strata under various blasting blast hole parameters by utilizing a computer numerical value, and optimizing blasting blast hole parameters with the best effect;
and performing field implementation and effect evaluation on the optimal blasting blast hole parameters to obtain deep hole blasting blast hole parameters suitable for the primary roof caving requirement of the roof mining of the specific working face.
In some embodiments, the roof strata is in the range of 3-7 times greater than the thickness of the coal seam.
In some embodiments, the physical mechanical parameters include uniaxial compressive strength, tensile strength, elastic modulus, poisson's ratio, cohesion, internal friction angle, and density.
In some embodiments, the key parameters include formation lithology, formation thickness, and formation fracture resistance.
In some embodiments, the downhole borehole peeping results are obtained by peeping joint fracture development in the coal and roof strata using a borehole peeping instrument and a logging instrument at a cut and a double-pass line, and performing a grading evaluation.
In some embodiments, the mechanism of action of the mine pressure is used to determine the formation of the overburden of the mined seam that is responsible for the mine pressure during the initial stages of mining.
In some embodiments, the blast weakening mechanism is utilized to obtain the blast fracture zone and fracture zone radii.
In some embodiments, the parameters of the deep hole blasting blasthole include the aperture, depth, inclination angle and interval of the blast holes of the two cis channels, and the aperture, depth, inclination angle, interval row distance, charge length, hole sealing length and charge uncoupled coefficient of the cut hole blasthole.
In some embodiments, the effect evaluation method is to peep near the non-blasting hole by using a drilling imager, observe the crack and the case of the blast in the near hole before and after blasting, if the near hole does not see obvious crack and blast, then make a drilling hole in the middle of the blasting hole and the near hole to peep until the range of the blasting weakening crack area is mastered, and take twice the expansion range of the crack area as the inter-blast-hole row spacing.
In some embodiments, the effect evaluation method is to perform primary pressure analysis by combining working resistance data of a hydraulic support of a working face in the working face stoping process to obtain a primary pressure step distance, a pressure degree, a pressure time and a pressure duration distance of a top plate of the working face of the hard top plate, and consider that the blasting scheme is feasible when the primary pressure step distance meets the safety stoping of the working face, and the blasting scheme can be used as a reference for the design of a follow-up forced roof caving scheme for the primary stoping of the working face of the hard top plate, so that the workload of an optimization scheme is further reduced, a computer is intelligently optimized to select corresponding blasting parameters, and finally deep hole blasting parameters suitable for the primary roof caving of the top plate of the mining of the specific working face are obtained.
Compared with the prior art, the invention has the beneficial effects that:
the method comprehensively considers the conditions of the coal bed and the occurrence condition of the top plate, designs deep hole blasting parameters according to the blasting weakening mechanism and the mining pressure action mechanism and by combining the underground construction environment and the safety guarantee conditions, and has operability, pertinence and reliability.
According to the method, the continuous discontinuous numerical calculation method is adopted to simulate the optimized blasting parameters, so that the continuous discontinuous characteristics of the coal bed and the roof strata are considered, the blasting weakening mechanism and the ore pressure action mechanism can be realized, the damage degree of the roof strata under different blasting weakening parameters can be effectively obtained, and the weakening effects of different blasting parameters are evaluated through the quantization indexes.
The method can further dynamically optimize blasting parameters in site construction, follow-up evaluation of the weakening effect of primary mining top-setting deep hole blasting, reduce safety risk and ensure safe and efficient propulsion of the working surface.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a flow chart of a preferred method for intelligently blasting parameters of a primary roof caving deep hole of a hard roof;
FIG. 2 is a top view of a blasthole arrangement in accordance with one embodiment of the present invention;
FIG. 3 is a rear view of a blasthole arrangement in accordance with one embodiment of the present invention;
FIG. 4 is a left side view of a blasthole arrangement in accordance with one embodiment of the present invention;
reference numerals illustrate:
the air return guide way 1, the bracket 2, the blast holes 3, the cutting holes 4, the air inlet guide way 5, the mined coal seam 6, the direct roof 7, the first basic roof 8, the second basic roof 9, the third basic roof 10 and the middle-high basic roof 11.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The intelligent optimization method for the primary roof caving deep hole blasting parameters of the hard roof according to the embodiment of the invention is described below with reference to the accompanying drawings.
As shown in FIG. 1, the intelligent optimization method for the primary roof caving deep hole blasting parameters of the hard roof comprises the following steps:
(1) Obtaining key parameters of each horizon rock stratum according to physical and mechanical parameters of the coal bed and roof rock stratum and a downhole drilling peeping result;
(2) Determining the weakening range of the top of the primary mining by utilizing a blasting weakening mechanism and an ore pressure action mechanism and combining the coal bed conditions and the occurrence condition of the top plate;
(3) Under the condition of guaranteeing the safety of downhole construction of the blastholes, the parameters of the blastholes of the initial mining roof-setting deep hole blasting of the hard top plate are designed;
(4) Simulating the weakening effect of the roof strata under various blasting blast hole parameters by utilizing a computer numerical value, and optimizing blasting blast hole parameters with the best effect;
(5) And performing field implementation and effect evaluation on the optimal blasting blast hole parameters to obtain deep hole blasting blast hole parameters suitable for the primary roof caving requirement of the roof mining of the specific working face.
In the step (1), the roof strata is in a range of more than 3-7 times of the thickness of the coal seam, physical mechanical parameters comprise uniaxial compressive strength, tensile strength, elastic modulus, poisson ratio, cohesive force, internal friction angle, density and the like, laboratory tests are adopted to obtain the uniaxial compressive strength, tensile strength, elastic modulus, poisson ratio, cohesive force, internal friction angle, density and other physical mechanical parameters of the coal seam and the roof strata, the roof strata is taken to be more than 3-7 times of the thickness of the coal seam, and a drilling peeping instrument and a logging instrument are utilized to peep joint crack development condition inside the roof strata at a height of more than 3-7 times of the thickness of the coal seam at a cut hole and two-way slots, and grading evaluation is carried out to obtain key parameters such as lithology, thickness, fracture resistance and the like of each horizon strata.
In the step (2), parameters such as stratum layers, layer numbers, ranges and the like of the rock stratum needing weakening at the top of the primary mining are analyzed by utilizing a blasting weakening mechanism and an ore pressure action mechanism and combining coal bed conditions and roof occurrence conditions. The conditions of the coal bed comprise the thickness of the coal bed, the burial depth of the coal bed, the mining method of the coal bed and the physical and mechanical parameters of the coal bed, and the occurrence condition of the roof comprises the roof horizon, the roof lithology, the roof thickness and the roof physical and mechanical parameters. The blasting weakening mainly generates a breaking area, a crack area and an elastic area, wherein factors for determining the weakening effect of the hard top plate are the crack area range and the interpenetration degree generated by deep hole blasting; the mining pressure action mechanism mainly determines which rock layers play a role in determining the mining pressure in the initial mining stage in the hard roof covered on the mining coal layer, or the contribution degree of the rock layers to the development of the mining pressure is determined, and the pre-weakened rock layers within the range of more than 3-7 times of the thickness of the coal layer are obtained based on the mining pressure theory and the key layer theory.
In the steps (3) and (4), environment assessment is carried out, the underground observation and hole cutting, two-gateway construction environment and safety guarantee conditions are carried out, the arrangement and the laying of an air path, a water pipe and a circuit are included, the size of a hole cutting bracket and the occupied space of the hole cutting bracket are increased, roadway top plates, two-side support parameters and stability are provided, basic conditions are provided for designing blast hole parameters, and the blast hole can be normally constructed according to design parameters. According to occurrence conditions of coal beds and roof plates, based on theoretical analysis results, and in combination with construction environments, designing deep hole blasting parameters of the hard roof plates, wherein the parameters comprise hole diameters, depths, inclination angles and intervals of blast holes of two cis-slots; the working face blast hole diameter, depth, inclination angle, interval row distance, charging length, hole sealing length, charging uncoupling coefficient, detonator usage amount, detonating cord usage amount, charging process, hole sealing material, hole sealing process and the like. Different parameters are designed, weakening effects of various blasting parameters are simulated by using a continuous discontinuous numerical calculation method based on an orthogonal test, damage degree is used as a quantization index, and blasting parameters with the best effects are intelligently optimized.
And (5) performing field implementation and effect evaluation on optimal blasting hole parameters optimized by a computer, and obtaining deep hole blasting hole parameters suitable for the primary roof caving requirement of the roof mining of a specific working face. The effect evaluation can be carried out in two ways, namely, peeping is carried out on the nearby hole which is not blasted by using a drilling imager, the conditions of cracks and blastsmoke in the nearby hole before and after blasting are observed, if obvious cracks and blastsmoke are not seen in the nearby hole, a drilling hole is additionally drilled at the middle position of the blasted hole and the nearby hole for peeping until the range of the blasting weakened crack area is mastered to be standard, and finally, the double of the expansion range of the crack area is taken as the inter-blasthole row distance; the other mode is to evaluate in the working face stoping process, evaluate by using the caving condition of the top coal/top plate, and perform primary pressure analysis by combining the working resistance data/cloud image of the hydraulic support of the working face to obtain the information such as the primary pressure step distance, the pressure intensity, the pressure time and the continuous pressure distance of the top plate of the hard top plate, and when the primary pressure step distance meets the working face safety stoping, the blasting scheme can be considered to be feasible, and can be used as the reference of the design of the follow-up forced caving scheme of the primary mining of the working face of the hard top plate, the workload of the optimization scheme is further reduced, the intelligent optimization of corresponding blasting parameters is realized by using the computer numerical simulation result, and finally the deep hole blasting parameters suitable for the primary caving requirement of the top plate of the mining top plate of the specific working face are obtained.
In order to make the present invention more clearly understood, the method of the present invention is illustrated by way of example with respect to the design of the primary roof caving deep hole blast parameters for a hard roof of a fully mechanized caving face, as shown in fig. 2-4.
The thickness of a coal seam 6 mined from a certain mine is h, an upper roof stratum sequentially comprises a roof direct roof 7, a first basic roof 8 and a second basic roof 9, the second basic roof 9 is hard sandstone, a third basic roof 10, a middle-high basic roof 11 and the middle-high basic roof 11 are thick hard sandstone. According to the physical and mechanical parameter test of the coal bed and roof strata and the analysis of the underground drilling peeping result, the second basic roof 9 and the medium-high basic roof 11 are thick hard sandstone layers, and the accumulated thickness is 3-7 times of the coal bed thickness h.
Analyzing the ore pressure acting forces of the direct roof 7, the first basic roof 8, the second basic roof 9, the third basic roof 10 and the medium-high basic roof 11 by utilizing a key layer ore pressure acting mechanism to obtain a force source rock stratum with strong ore pressure during initial mining, wherein key weakening is needed to ensure that a hard top plate can be broken and collapsed smoothly during the initial mining; and obtaining the radius of a broken area and a crack area of blasting in the thick and hard sandstone layer of the top plate by using a deep hole blasting weakening mechanism so as to facilitate the subsequent design of blasting process parameters.
According to the underground construction environment, the space dimensions of the return air cis-slot 1, the support 2, the cutting holes 4 and the air inlet cis-slot 5, the arrangement of peripheral air passages, water pipes, power supplies and mechanical equipment and the like are considered, so that the safety of constructors and equipment is ensured, the safety of the environment is considered, and the guarantee is provided for the subsequent design of blasting process parameters.
According to the analysis, theoretical analysis and construction environment consideration of the occurrence conditions of the coal bed and the roof, the primary roof caving deep hole blasting parameters of a certain mine hard roof are designed, and the angles (alpha) of different blast holes 3 are simulated by using a continuous discontinuous numerical calculation method 1 、α 2 、α 3 、α 4 、β 1 、β 2 ) Deep hole blasting weakening effects under schemes of depth, length, charge uncoupled coefficient, hole sealing length and the like, and a computer can intelligently select optimal blasting parameters to finally obtain the blast hole spacing d in the cis-slot 1 A weakening leading distance of n 1 *d 1 The method comprises the steps of carrying out a first treatment on the surface of the Length L of cutting hole and interval d of blast holes in cutting hole 2 The depth vertical height exceeds half of the middle-high basic roof stratum, the hole sealing length is 1/3 of the length of the blast hole, and the charge uncoupled coefficient is 1.3.
The later evaluation analysis shows that the intelligent optimized scheme can obviously reduce the primary step-by-step distance of the hard top plate of the working face and ensure the normal stope of the working face.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms may be directed to different embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The intelligent optimization method for the blasting parameters of the primary roof caving deep hole of the hard roof is characterized by comprising the following steps:
obtaining key parameters of each horizon rock stratum according to physical and mechanical parameters of the coal bed and roof rock stratum and a downhole drilling peeping result;
determining the weakening range of the top of the primary mining by utilizing a blasting weakening mechanism and an ore pressure action mechanism and combining the coal bed conditions and the occurrence condition of the top plate;
under the condition of guaranteeing the underground construction environment of the blastholes, the parameters of the blastholes of the initial mining roof-setting deep hole blasting of the hard top plate are designed;
simulating the weakening effect of the roof strata under various blasting blast hole parameters by utilizing a computer numerical value, and optimizing blasting blast hole parameters with the best effect;
and performing field implementation and effect evaluation on the optimal blasting blast hole parameters to obtain deep hole blasting blast hole parameters suitable for the primary roof caving requirement of the roof mining of the specific working face.
2. The method of claim 1, wherein the roof strata is in the range of 3 to 7 times greater than the thickness of the coal seam.
3. The method of claim 1, wherein the physical mechanical parameters comprise uniaxial compressive strength, tensile strength, elastic modulus, poisson's ratio, cohesion, internal friction angle, and density.
4. The method of claim 1, wherein the key parameters include formation lithology, formation thickness, and formation fracture resistance.
5. The method of claim 1, wherein the downhole borehole peeping results are obtained by using a borehole peeping instrument and a logging instrument to peep joint fracture development in the coal and roof formations at the cut and the double-pass, and performing a grading evaluation.
6. The method of claim 1, wherein the mechanism of mine pressure is used to determine rock formations in the overburden hard roof of the mined seam that are responsible for mine pressure during the initial mining phase.
7. The method of claim 1, wherein the blast weakening mechanism is utilized to obtain a blast fracture zone and fracture zone radius.
8. The method of claim 1, wherein the parameters of the deep hole blasting blasthole include the aperture, depth, inclination and spacing of the two-gate blasthole, the aperture, depth, inclination, spacing, charge length, hole-sealing length, charge decoupling coefficient, hole-sealing length of the hole-cutting blasthole.
9. The method of claim 1, wherein the effect evaluation method is to peep near the non-blasted hole by using a borehole imager, observe the situation of cracks and blastholes in the near hole before and after blasting, and if no obvious cracks and blastholes are found in the near hole, then to peep by repairing a borehole in the middle of the blasthole and the near hole until the range of the blasting weakened crack area is mastered, and take twice the expansion range of the crack area as the inter-blasthole row spacing.
10. The method of claim 1, wherein the effect evaluation method is to perform primary pressure analysis by combining working resistance data of a hydraulic support of a working face in the working face stoping process to obtain primary pressure step distance, pressure intensity, pressure time and continuous pressure distance of a top plate of a hard top plate, and consider that the blasting scheme is feasible when the primary pressure step distance meets the working face safety stoping requirement, and the method can be used as a reference for designing a follow-up primary mining forced roof caving scheme of the working face of the hard top plate, further reduce the workload of the optimization scheme, intelligently select corresponding blasting parameters by utilizing a computer numerical simulation result, and finally obtain deep hole blasting parameters suitable for the primary roof caving requirement of the top plate of the mining top plate of the specific working face.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117195526A (en) * | 2023-08-31 | 2023-12-08 | 山东能源集团有限公司 | Method and system for identifying roof targeting blasting stratum layer of working face of underground coal mine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117195526A (en) * | 2023-08-31 | 2023-12-08 | 山东能源集团有限公司 | Method and system for identifying roof targeting blasting stratum layer of working face of underground coal mine |
| CN117195526B (en) * | 2023-08-31 | 2024-03-15 | 山东能源集团有限公司 | Method and system for identifying roof targeting blasting stratum layer of working face of underground coal mine |
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