CN110298141B - Underground chamber layout optimization design method for underground mining - Google Patents
Underground chamber layout optimization design method for underground mining Download PDFInfo
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Abstract
The invention discloses an optimization design method for underground chamber layout of a well, which comprises the following steps: analyzing surrounding rock stress and deformation damage characteristics at roadway cave intersection points; analyzing the intersection angles of different tunnel and cave and the movement rules of surrounding rocks under the arrangement structure; determining the minimum size of a coal gangue sorting chamber and a filling material preparation chamber; and determining a coal gangue separation system under the coal mine. According to the invention, the underground mine chambers are fully laid out and optimized in aspects of chamber group structure optimization, chamber section size effect, demonstration of large-section chamber structure and size optimization of a mine, compact layout optimization of large-section dense chambers, the underground coal gangue separation system of a coal mine is perfected through three different chambers, finally, a compact layout optimization model of the dense chambers is established, influence weights of various factors are determined, the h-shaped chamber group layout effect is quantitatively evaluated by fuzzy comprehensive evaluation, and the overall optimization layout of sorting and preparing chamber groups is comprehensively determined.
Description
Technical Field
The invention belongs to the technical field of mine chamber layout optimization, and particularly relates to a method for optimizing and designing a well and mining underground chamber layout.
Background
The underground chamber refers to a structure which is excavated manually or exists in a rock-soil body naturally and is used for various purposes, and the purposes are as follows: mine tunnels (wells), traffic tunnels, hydraulic tunnels, underground workshops (warehouses), and underground military projects; the pressure conditions of the underground wall are as follows: a pressure chamber and a non-pressure chamber; the cross-sectional shape is as follows: circular, rectangular, gate-shaped, oval; the relation with the horizontal plane is as follows: horizontal chambers, inclined chambers, vertical chambers (wells); the method comprises the following steps of: rock chamber and soil chamber; the stress conditions are as follows: single chamber and group chamber.
Along with development of science and technology, mine exploitation tunneling technology is greatly improved, different analysis methods can be adopted according to different structures of surrounding rocks, and rock masses with complete structures are as follows: elastoplastic mechanical analysis; the rock mass with the block structure comprises: block balance theory analysis; the disintegrated and loose structure rock mass has: mechanical analysis of the loose body; the layout optimization of the existing coal mine is insufficient when the underground chamber is designed, so that an underground chamber layout optimization design method of the underground coal mine needs to be provided to solve the problems.
Disclosure of Invention
Based on the defects in the prior art, the technical problem solved by the invention is to provide an underground chamber layout optimization design method for a mine, which has the advantages of optimizing the layout of the mine chamber in the aspects of chamber group structure optimization, chamber section size effect, demonstration of large-section chamber structure and size optimization of a mine, and compact layout optimization of a large-section dense chamber, and solves the problem that the layout optimization is insufficient when the conventional coal mine is designed.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention provides an optimization design method for underground chamber layout of a well, which comprises the following steps:
s1: analyzing surrounding rock stress and deformation damage characteristics at roadway junction points by combining surrounding rock bearing characteristics of the chamber group;
s2: analyzing the surrounding rock movement rules under different roadway junction angles and arrangement structures, and establishing a mutual feedback influence mechanism with the section shape selection and the section size selection of the chamber;
s3: determining the minimum size of a coal gangue sorting chamber and a filling material preparation chamber;
s4: determining a coal gangue separation system under a coal mine;
s5: and (3) comprehensively judging and sorting ground stress distribution rules, a main roadway transportation mode, a coal gangue flow transportation mode and surrounding rock condition factors, and preparing the azimuth relation between the long axis of the chamber and the main roadway at the bottom of the well.
Optionally, in step S2, the influence rule of the size effect between the tunnel groups and the chamber spacing on the stability of the surrounding rock of the tunnel groups under the condition that the production requirement is met is analyzed, and the shape and the size of the chambers are further optimized, so that the modularized and compact arrangement of the deep underground group chambers is realized.
Optionally, in step S3, on the basis of comprehensively considering the cross-sectional shape of the chamber and the stability of the locating surrounding rock, a mechanical model and a numerical model are established to quantitatively evaluate the size of the chamber.
In step S3, reasonable chamber size parameters are determined, and the cross-sectional shape, the size effect, the group chamber effect and the mutual feedback influence mechanism of the underground coal gangue sorting chamber group and the filling material preparation chamber group are established.
In step S4, the coal-gangue separation system mainly includes a screening and crushing chamber, a heavy medium shallow slot coal-gangue separation chamber and a slime water adding chamber, wherein the screening and crushing chamber, the heavy medium shallow slot coal-gangue separation chamber and the slime water adding chamber all adopt three-core arch sections.
Further, the screening and crushing chamber comprises a fluted disc roller screen, a crusher and a raw coal feeding belt conveyor, wherein the raw coal feeding belt conveyor is driven by a middle double roller, the height of the chamber is controlled within 8.0m, the width of the chamber is 6.5m, the raw coal feeding belt conveyor enters the screening and crushing chamber from a raw coal feeding belt tunnel to be gradually higher by 4.45m to 8.0m, and a local horizontal groove is opened by 2.20m to form a niche.
Further, the heavy medium shallow groove coal gangue separation chamber is a three-arch chamber with the width of multiplied by the height of multiplied by 7.5m multiplied by 8.0m, the links of concentrating, dehydrating, clarifying and filter pressing the magnetic separation tailing pond and the coal slime are arranged in a concentrated way, and four ponds with the depth of phi 4.5m multiplied by 4.5m are dug on the bottom plate of the chamber and are respectively used as a qualified medium pond, a dilute medium pond, a magnetic separation tailing pond and a circulating water pond.
Furthermore, the coal slime water adding chamber is a three-arch chamber with the width of x height=7.0mx7.5m, and a coal slime sedimentation tank with the length of x width of x depth=30.0mx4.2mx2.8m is dug on the bottom plate of the chamber.
Optionally, in step S5, based on basic principles of sorting, preparing chamber group layout compactly, avoiding influence of arrangement of chamber groups on working face extraction, guaranteeing stability of surrounding rock during service of chamber groups, lowest transportation cost of coal gangue logistics, and the like, a compact layout optimization model of dense chamber is built, influence weights of various factors are determined, and overall optimization layout of sorting and preparing chamber groups is finally determined by quantitatively evaluating h-type and P-type chamber group layout effects by fuzzy comprehensive evaluation.
The invention fully lays out and optimizes the underground chambers from the aspects of chamber group structure optimization, chamber section size effect, demonstration of mine large-section chamber structure and size optimization and large-section dense chamber compact layout optimization, realizes modularized and compact arrangement of deep underground group chambers, perfects underground coal gangue separation systems of the coal mine through three different chambers, finally establishes a dense chamber compact layout optimization model, determines the influence weight of various factors, quantitatively evaluates the h-type and P-type chamber group layout effect by fuzzy comprehensive evaluation, and finally comprehensively determines and sorts and prepares the integral optimized layout of the chamber group.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as to provide further clarity and understanding of the above and other objects, features and advantages of the present invention, as described in the following detailed description of the preferred embodiments, taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a flow chart of the method of optimizing the layout of underground chambers of a well;
FIG. 2 is a schematic cross-sectional view of a screening and crushing chamber of the present invention;
FIG. 3 is a schematic cross-sectional view of the heavy medium shallow slot coal gangue separation chamber of the invention;
FIG. 4 is a schematic diagram of a compact layout optimization flow for a large-section dense chamber of the present invention.
Detailed Description
The following detailed description of the invention, taken in conjunction with the accompanying drawings, illustrates the principles of the invention by way of example and by way of a further explanation of the principles of the invention, and its features and advantages will be apparent from the detailed description. In the drawings to which reference is made, the same or similar components in different drawings are denoted by the same reference numerals.
Examples
According to the spatial position of the new huge dragon coal mine 1302N-2# mining and charging working face, the conditions of chamber group layout site selection arrangement principle, chamber structure, size requirement and the like are combined, the influences of factors such as comprehensive economic evaluation of coal gangue logistics transportation, geological structure azimuth of faults and the like are comprehensively considered, and the coal gangue sorting and gangue preparation chamber group is compactly arranged on the west side of a north area transportation main roadway, the south side of a mining area return air upper mountain and the east side 'h' -shaped same side of a 1310S lower roadway. Screening and crushing, heavy medium shallow slot sorting chambers are respectively arranged in two parallel tunnels, and a screening product transferring tunnel is arranged between the screening and crushing and heavy medium shallow slot sorting chambers to bear the transferring work of raw coal under the screen and raw coal blocks. In order to ensure convenient transfer of the block raw coal to the chute of the separator, the center line of the block raw coal transfer belt conveyor is vertical to the longitudinal center line of the shallow-slot separator.
As shown in fig. 1 to 4, the underground chamber layout optimization design method of the underground mining well of the invention comprises the following steps:
the first step: and by combining the bearing characteristics of surrounding rocks of the chamber group and applying related theories such as rock mass mechanics, elastic mechanics, limit balance theory and the like, analyzing the stress and deformation damage characteristics of the surrounding rocks at the junction point of the drift chamber.
And a second step of: and analyzing the surrounding rock movement rules under different roadway tunnel crossing angles and arrangement structures by using numerical simulation software such as ANSYS, FLAC3D and the like, establishing a mutual feedback influence mechanism with the section shape selection and the size selection of the tunnel group, analyzing the influence rule of the inter-tunnel group size effect and the tunnel space on the stability of the tunnel group surrounding rock under the condition that the production requirement is met, and further optimizing the shape and the size of the tunnel, thereby realizing the modularization and compact arrangement of the deep underground group tunnel.
And a third step of: according to the requirements of demonstration mine gangue sorting capability, selected gangue sorting equipment and technology, filling material preparation equipment and technology and the like, the minimum size of a gangue sorting chamber and a filling material preparation chamber is determined, on the basis of comprehensively considering the sectional shape of the chamber and the stability of site-selecting surrounding rock, a mechanical model and a numerical model are established to quantitatively evaluate the chamber size, the utilization rate of the section is fully improved, reasonable chamber size parameters are determined, and the sectional shape, the size effect, the group chamber effect and the mutual feedback influence mechanism of a downhole gangue sorting chamber group and the filling material preparation chamber group are established.
Fourth step: the novel underground coal and gangue separation system of the huge dragon coal mine mainly comprises a screening and crushing chamber, a heavy medium shallow slot coal and gangue separation chamber and a coal slime water medium adding chamber, and all chambers adopt three-heart arch-shaped sections because of larger size of coal and gangue separation equipment so as to improve section utilization rate and roof bearing capacity to the greatest extent. On the basis of meeting the stability of surrounding rock, on the premise of meeting the requirement of the size of chamber equipment, the minimum size of each chamber is comprehensively determined, wherein the screening and crushing chamber comprises a fluted disc roller screen, a crusher and a coarse coal feeding belt conveyor, the coarse coal feeding belt conveyor is driven by adopting a middle double roller based on the control of the total height of the chamber and the larger load control of the belt conveyor, and the height of the chamber is controlled within 8.0m and the width of the chamber is 6.5m. The raw coal enters a belt washing roadway and enters a screening and crushing chamber to gradually rise to 4.45m to 8.0m, and a local horizontal groove is 2.20m to dig a niche. The size of the heavy medium shallow slot coal gangue separation chamber is 7.5m multiplied by 8.0m (width multiplied by height, and local height is 9.0 m). In order to facilitate slime water treatment, the links of the magnetic separation tailing pond, the slime concentration, the dehydration, the clarification and the filter pressing are arranged in a centralized way as much as possible, and four ponds with phi of 4.5m multiplied by 4.5m are dug on the bottom plate of the chamber and are respectively used as a qualified medium pond, a dilute medium pond, a magnetic separation tailing pond and a circulating water pond. The size of the slime water adding chamber is 7.0m multiplied by 7.5m (width multiplied by height), and a 30.0m multiplied by 4.2m multiplied by 2.8m (length multiplied by width multiplied by depth) slime sedimentation tank is dug on the bottom plate of the chamber.
Fifth step: according to the requirements of the key technology of underground intelligent separation and in-situ filling of deep coal mines, the underground chamber group has the arrangement requirements of large section, dense distribution, service life limit length and the like, the positions of surrounding tunnels are intricate and complex, the underground chamber group is influenced by mining environment of three-high and one-disturbance, the underground chamber group excavation is a nonlinear and large-deformation dynamic evolution process, and the comprehensive factors such as ground stress distribution rule, a large tunnel transportation mode, a coal gangue flow transportation mode, surrounding rock conditions and the like determine and classify the azimuth relation of a long axis of a preparation chamber and a shaft bottom large tunnel. Based on basic principles of compact layout of sorting and preparing chamber groups, avoiding influence of arrangement of chamber groups on working face extraction, guaranteeing stability of surrounding rock during chamber group service, lowest transportation cost of coal gangue logistics and the like, a compact layout optimization model of dense chamber is established, influence weights of various factors are determined, and overall optimization layout of sorting and preparing chamber groups is finally comprehensively determined by quantitatively evaluating the h-shaped and P-shaped chamber group layout effect by adopting fuzzy comprehensive evaluation method.
The underground mine chamber layout optimization design method of the invention fully lays out and optimizes the underground mine chambers from the aspects of chamber group structure optimization, chamber section size effect, demonstration of mine large-section chamber structure and size optimization and large-section dense chamber compact layout optimization, realizes modularization and compact arrangement of deep underground group chambers, perfects underground coal gangue separation systems of the coal mine through three different chambers, finally establishes a dense chamber compact layout optimization model, determines the influence weight of various factors, quantitatively evaluates the h-shaped and P-shaped chamber group layout effect by adopting fuzzy comprehensive evaluation, and finally comprehensively determines the overall optimized layout of sorting and preparing chamber groups.
While the invention has been described with respect to the preferred embodiments, it will be understood that the invention is not limited thereto, but is capable of modification and variation without departing from the spirit of the invention, as will be apparent to those skilled in the art.
Claims (1)
1. The underground chamber layout optimization design method for the underground mining is characterized by comprising the following steps of:
s1: analyzing surrounding rock stress and deformation damage characteristics at roadway junction points by combining surrounding rock bearing characteristics of the chamber group;
s2: analyzing the surrounding rock movement rules under different roadway junction angles and arrangement structures, and establishing a mutual feedback influence mechanism with the section shape selection and the section size selection of the chamber;
s3: determining the minimum size of a coal gangue sorting chamber and a filling material preparation chamber;
s4: determining a coal gangue separation system under a coal mine;
s5: judging and sorting the ground stress distribution rule, the main roadway transportation mode, the coal gangue flow transportation mode and surrounding rock condition factors comprehensively, and preparing the azimuth relation between the long shaft of the chamber and the main roadway at the bottom of the well;
in step S2, analyzing the influence rule of the size effect among the tunnel groups and the chamber spacing on the stability of the surrounding rock of the tunnel groups under the condition that the production requirement is met, and further optimizing the shape and the size of the chambers to realize the modularization and compact arrangement of the deep underground group chambers;
in the step S3, on the basis of comprehensively considering the cross-section shape of the chamber and the stability of the locating surrounding rock, a mechanical model and a numerical model are established to quantitatively evaluate the size of the chamber; determining reasonable chamber size parameters, and establishing cross-sectional shapes, size effects, group chamber effects and mutual feedback influence mechanisms of underground coal gangue sorting chamber groups and filling material preparation chamber groups;
in step S4, the coal-gangue separation system mainly includes a screening and crushing chamber, a heavy medium shallow slot coal-gangue separation chamber and a slime water adding chamber, wherein the screening and crushing chamber, the heavy medium shallow slot coal-gangue separation chamber and the slime water adding chamber all adopt three-center arch sections;
the screening and crushing chamber comprises a fluted disc roller screen, a crusher and a raw coal feeding belt conveyor, wherein the raw coal feeding belt conveyor is driven by a middle double roller, the height of the chamber is controlled within 8.0m, the width of the chamber is 6.5m, the raw coal feeding belt tunnel is gradually increased to 4.45-8.0 m, and a local horizontal groove is 2.20m for digging a niche;
the heavy medium shallow groove coal gangue separation chamber is a three-center arch chamber with the width of multiplied by the height of multiplied by 7.5m multiplied by 8.0m, the magnetic separation tailing pond and the coal slime are concentrated, dehydrated, clarified and filter-pressed, four ponds with the depth of phi 4.5m multiplied by 4.5m are excavated on the bottom plate of the chamber and are respectively used as a qualified medium pond, a dilute medium pond, a magnetic separation tailing pond and a circulating water pond;
the coal slime water adding chamber is a three-arch chamber with the width of x height=7.0mx7.5m, and a coal slime sedimentation tank with the length of x width of x depth=30.0mx4.2mx2.8m is dug on a bottom plate of the chamber;
based on basic principles of compact layout of sorting and preparing chamber groups, avoiding influence of arrangement of chamber groups on working face extraction, guaranteeing stability of surrounding rock and lowest transportation cost of coal gangue logistics during service of the chamber groups, establishing a compact layout optimization model of dense chamber, determining influence weights of various factors, quantitatively evaluating the layout effect of the h-shaped chamber groups and the P-shaped chamber groups by adopting a fuzzy comprehensive evaluation method, and finally comprehensively determining the overall optimization layout of the sorting and preparing chamber groups.
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| CN112343627A (en) * | 2020-11-03 | 2021-02-09 | 中国平煤神马能源化工集团有限责任公司 | Method for controlling stability of surrounding rock of deep ultra-large section dense chamber group |
| CN112879084B (en) * | 2021-01-18 | 2021-11-23 | 长沙矿山研究院有限责任公司 | Method for forming tailing underground storage system |
| CN113006815B (en) * | 2021-04-28 | 2021-12-10 | 中国矿业大学 | Compact layout method for underground coal and gangue separation chamber group |
| CN113217012B (en) * | 2021-05-26 | 2022-04-12 | 中国矿业大学 | Optimization design method for section of underground separation chamber |
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