CN105118365A - Similar simulation stereo experiment model of coal mining working face - Google Patents
Similar simulation stereo experiment model of coal mining working face Download PDFInfo
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- CN105118365A CN105118365A CN201510604874.2A CN201510604874A CN105118365A CN 105118365 A CN105118365 A CN 105118365A CN 201510604874 A CN201510604874 A CN 201510604874A CN 105118365 A CN105118365 A CN 105118365A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
Abstract
The invention relates to a similar simulation stereo experiment model of a coal mining working face. The model is suitable for testing the influence of buried depth, inclination angles for different lithologic features and other coal mining working face occurrence condition conditions upon a working face (surrounding rock-support) relation, roof and floor crack growth and roof fracture step pitches. The model includes a pedestal, a hydraulic loading device, a multifunctional hydraulic support, a simulation rock stratum, a rotary device, a signal acquisition system and a signal analysis system. Through adoption of the rotary device high in strength, a certain supporting capability is guaranteed, and the inclination angle of a simulation stope can be effectively changed. The multifunctional hydraulic support is of a structure with four connecting rods, so variable supports with different structures can be provided, and the cost needed by an experiment is saved. Sound signals, pressure signals and strain signals acquired by the signal acquisition system can be effectively converted by the signal analysis system into crack signals and surrounding rock-support characteristic curves. In this way, support experiments for simulating various types of supports in different stope environments on one experiment platform can be achieved to determine the surrounding rocks-support relations, roof and floor crack growth and fracture step pitches.
Description
Technical field:
The present invention relates to the three-dimensional empirical model of a kind of mining coal-face analog simulation, it is applicable to test buried depth, inclination angle to the impact of the coal-face occurrence conditions such as different lithology on workplace " country rock-supporting " relation, roof and floor cranny development and roof break step pitch.
Background technology:
Easily there is coal rock dynamic disaster when producing in mine down-hole, the great threat to Safety of Coal Mine Production band, and the generation of these disaster accidents, all grows relevant with being not suitable with between " country rock-supporting ", wall-rock crack.When the support designed well can not adapt to coal-face, support pressure rack, roof break step pitch will be caused to increase, or even roof collapse; Rock material is when bearing load, and its inside will produce stress raisers, when reaching its critical fracture intensity, the lesion ruptures of coal and rock can be there is, when wall-rock crack is grown, Gas Outburst, fissure zone water guide very easily occur, or even gas explosion and water inrush accident occur.So research " country rock-supporting " relation, wall-rock crack are grown, significant to instructing Safety of Coal Mine Production.Test " country rock-supporting " relation curve is the important evidence instructing support Design, by acoustic signals test coal and rock cranny development, is also current comparatively effective means.
, there is following deficiency in current mining coal-face similarity simulation experiment model:
1. cannot test by simulating stereo, can only simulate on plane scale model;
2. cannot ensure the intensity simulating base, be to bear larger loading stress by the base of the adjustable-angle of the articulated manner simulations such as steel plate;
3. cannot test " country rock-supporting " characteristic curve and wall-rock crack growth, be to draw accurate data only by foil gauge monitoring, displacement observation;
Therefore, need to improve above-mentioned mining coal-face similarity simulation experiment model.
Summary of the invention:
The present invention proposes the three-dimensional empirical model of a kind of mining coal-face analog simulation, is to solve cannot carrying out stereoscopic model experiment, cannot obtain accurate " country rock-supporting " characteristic curve, accurately cannot judging that roof fracture is grown and the problem such as fracture step of domestic existing coal-face empirical model.
Solve above drawback and have employed following technical scheme.The present invention includes base, hydraulic loading device, multifunction hydraulic support, simulation rock stratum, whirligig, signal acquiring system and Signal Analysis System, wherein: described base is trapezoidal base, comprise halfpace, be located at the right base on the right of halfpace and be located at the groove on the halfpace left side, and the height of described halfpace is higher than the height of described right base and described groove.Described hydraulic loading device is placed on base, comprise four columns with holes, load back timber by high-strength bolt and column hinged, can move up and down along column, be located at the loading lifting jack loaded below back timber, bearing plate is arranged in and loads below lifting jack.Described multifunction hydraulic support comprises the top board, base plate, shielding plate, hydraulic pressure post alive and the front-rear linkage that are hinged, by conversion articulated position between any two, simulates the hydraulic support of not unit-frame type.Described simulation rock stratum is placed in above multifunction hydraulic rack plate respectively and below base plate, simulates the roof and floor of coal-face according to the corresponding rock stratum of production actual selection.Described whirligig comprises left rotation device and right rotation device, is the structural representation that whirligig of the present invention is connected see Fig. 5, Fig. 5; Left rotation device and right rotation device comprise and are rotatably connected bearing and support jack, and the two ends of support jack are respectively equipped with one and are rotatably connected bearing.Right rotation device one end is fixed on right base, and the right-hand member of the bottom surface of hydraulic loading device is fixed in one end; One end of left rotation device is fixed on halfpace, and the stage casing of the bottom surface of hydraulic loading device is fixed in one end.Described signal acquiring system comprises the Acoustic Signal Acquisition device and acoustic wave converter pasted outside simulation rock stratum, and pastes the pressure acquisition device of living on post at hydraulic support at the strain acquirement device and glutinous bullet that load jack hydraulic cylinder.Described Signal Analysis System comprises crack signal analyzer and " country rock-supporting " feature curve analysis instrument of process acoustical signal.
The advantage that the present invention has and good effect are: the whirligig that using degree of the present invention is higher, while the inclination angle of effective change simulation stope, certain supporting capacity can also be ensured, multifunction hydraulic support utilizes four-bar linkage structure, change multiple frame type support, save the cost needed for experiment, the acoustical signal that signal acquiring system gathers out, pressure signal, strain signal, crack signal and " country rock-supporting " characteristic curve can be effectively converted into by Signal Analysis System, thus achieve on a kind of experiment porch, namely the supporting experiment of multiple frame type support under simulating different stope environment, judge " country rock-supporting " relation, grasp roof fracture to grow and fracture step.
Accompanying drawing illustrates:
Fig. 1 is front view of the present invention;
Fig. 2 (a) base and whirligig;
Fig. 2 (b) whirligig and parts;
Fig. 3 (a) hydraulic loading device front view;
Fig. 3 (b) hydraulic loading device side view;
Fig. 4 (a) multifunction hydraulic support;
Fig. 4 (b) multifunction hydraulic support parts;
Fig. 5 signal acquiring system;
Fig. 6 Signal Analysis System;
In figure: 1-base; 2-halfpace; The right base of 3-; 4-groove; 5-hydraulic loading device; 6-column with holes; 7-loads back timber; 8-high-strength bolt; 9-loads lifting jack; 10-hydraulic pressure post alive; 11-bearing plate; 12-multifunction hydraulic support; 13-top board; 14-base plate; 15-screens plate; 16-front-rear linkage; 17-simulates rock stratum; 18-whirligig; 19-left rotation device; 20-right rotation device; 21-is rotatably connected bearing; 22-support jack; 23-signal acquiring system; 24-Signal Analysis System; 25-Acoustic Signal Acquisition device; 26-acoustic wave converter; 27-strain acquirement device; 28-pressure acquisition device; 29-set of signals is grown up to be a useful person; 30-crack signal analyzer; It is instrument that 31-" country rock-supporting " characteristic curve divides; 32-" country rock-supporting " analytic system; 33-crack Signal Analysis System.
Embodiment:
For understanding content of the present invention, Characteristic further, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
The present invention is a kind of three-dimensional model of the Environment Design according to analog simulation principle and true stope, utilize signal acquiring system and signal processing system, " country rock-supporting " accurately characteristic can be obtained, roof fracture is grown and roof break step pitch, a multiplex function can be had simultaneously, namely can realize the three-dimensional visual simulation experiment under not unit-frame type hydraulic support, different stope environment on same experiment porch.
This experiment porch can be tested as follows: 1) simulate different buried depth, inclination angle workplace and not unit-frame type hydraulic support on the impact of " country rock-supporting " characteristic curve; 2) simulate buried depth, inclination angle, roof and floor lithologic grow and the impact of roof break step pitch roof fracture.
Above-mentioned 2 experiments need complete following operation:
First experiment porch is assembled: will back timber hinged 7 be loaded in the suitable position of column 6 with holes, after loading back timber 7 arranged beneath loads lifting jack 8 well, bearing plate 10 is arranged on the hydraulic pressure loading lifting jack 8 post alive 9 times, after hydraulic loading device 5 has been assembled, and be fixed on base 1 be rotatably connected on bearing 20, above the top board 12 analog operation face roof and floor simulation rock stratum 16 being placed on multifunction hydraulic support 11 and below base plate 13.
Then, after above-mentioned basic working procedure completes, by controlling different single factor test simulation Different factor to experiment impact.Wherein, the loading force size of hydraulic control charger 1, simulation different buried depth condition; By the column length alive of retractable support lifting jack 21, the coal-face of simulation different angle; According to actual condition, the simulation rock stratum 15 of different materials is selected to simulate the stope roof and floor of different lithology; To be lived post 9 and front-rear linkage 15 articulated position between any two by the top board 12 of conversion multifunction hydraulic support 11, base plate 13, shielding plate 14 and hydraulic pressure, simulate not unit-frame type hydraulic support.
Finally carry out Signal sampling and processing: pasted by strain acquirement device 26 and live on post 9 at the hydraulic pressure loading lifting jack 8, pressure acquisition device 27 being sticked bullet lives on post 9 at the hydraulic pressure of multifunction hydraulic support 11, the strain collected, pressure signal are grown up to be a useful person through set of signals, be transferred to " country rock-supporting " feature curve analysis instrument 30, obtain corresponding " country rock-supporting " characteristic curve; Acoustic Signal Acquisition device 24 is pasted the outside in simulation rock stratum 16, the acoustic signals collected, through acoustic wave converter 25, is transferred to crack signal analyzer 29, obtains roof and floor cranny development situation and the roof break step pitch of simulation coal-face.
Claims (7)
1. a coal-face similarity simulation experiment platform, it is characterized in that, comprise base, hydraulic loading device, multifunction hydraulic support, simulation rock stratum, whirligig, signal acquiring system and Signal Analysis System, wherein: described base is trapezoidal base, comprise halfpace, be located at the right base on the right of halfpace and be located at the groove on the halfpace left side, and the height of described halfpace is higher than the height of described right base and described groove.
2. hydraulic loading device described in is placed on base, comprise four columns with holes, load back timber by high-strength bolt and column hinged, can move up and down along column, be located at the loading lifting jack loaded below back timber, bearing plate is arranged in and loads below lifting jack.
3. multifunction hydraulic support described in comprises the top board, base plate, shielding plate, hydraulic pressure post alive and the front-rear linkage that are hinged, by conversion articulated position between any two, simulates the hydraulic support of not unit-frame type.
4. simulate rock stratum described in be placed in above multifunction hydraulic rack plate respectively and below base plate, simulate the roof and floor of coal-face according to the corresponding rock stratum of production actual selection.
5. whirligig described in comprises left rotation device and right rotation device, is the structural representation that whirligig of the present invention is connected see Fig. 5, Fig. 5; Left rotation device and right rotation device comprise and are rotatably connected bearing and support jack, and the two ends of support jack are respectively equipped with one and are rotatably connected bearing.Right rotation device one end is fixed on right base, and the right-hand member of the bottom surface of hydraulic loading device is fixed in one end; One end of left rotation device is fixed on halfpace, and the stage casing of the bottom surface of hydraulic loading device is fixed in one end.
6. signal acquiring system described in comprises the Acoustic Signal Acquisition device and acoustic wave converter pasted outside simulation rock stratum, and pastes the pressure acquisition device of living on post at hydraulic support at the strain acquirement device and glutinous bullet that load jack hydraulic cylinder.
7. Signal Analysis System described in comprises crack signal analyzer and " country rock-supporting " feature curve analysis instrument of process acoustical signal.
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| CN201510604874.2A CN105118365A (en) | 2015-09-21 | 2015-09-21 | Similar simulation stereo experiment model of coal mining working face |
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| CN201510604874.2A CN105118365A (en) | 2015-09-21 | 2015-09-21 | Similar simulation stereo experiment model of coal mining working face |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827673A (en) * | 2018-04-03 | 2018-11-16 | 华北科技学院 | It is applicable in the coal working face similarity simulation experiment platform of not unit-frame type hydraulic support |
| CN111220402A (en) * | 2020-01-16 | 2020-06-02 | 兖矿集团有限公司 | Flexible working face simulation test platform |
| CN113299140A (en) * | 2021-05-28 | 2021-08-24 | 华能煤炭技术研究有限公司 | Colliery roof accident analogue means that sinks |
| CN114235585A (en) * | 2022-01-01 | 2022-03-25 | 天地科技股份有限公司 | Coal rock solid-liquid coupling analog simulation experiment device and use method |
| CN115326588A (en) * | 2022-09-01 | 2022-11-11 | 安徽恒源煤电股份有限公司 | Multi-functional novel analog simulation experiment device |
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2015
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827673A (en) * | 2018-04-03 | 2018-11-16 | 华北科技学院 | It is applicable in the coal working face similarity simulation experiment platform of not unit-frame type hydraulic support |
| CN111220402A (en) * | 2020-01-16 | 2020-06-02 | 兖矿集团有限公司 | Flexible working face simulation test platform |
| CN111220402B (en) * | 2020-01-16 | 2021-06-18 | 兖矿集团有限公司 | Flexible working face simulation test platform |
| CN113299140A (en) * | 2021-05-28 | 2021-08-24 | 华能煤炭技术研究有限公司 | Colliery roof accident analogue means that sinks |
| CN114235585A (en) * | 2022-01-01 | 2022-03-25 | 天地科技股份有限公司 | Coal rock solid-liquid coupling analog simulation experiment device and use method |
| CN115326588A (en) * | 2022-09-01 | 2022-11-11 | 安徽恒源煤电股份有限公司 | Multi-functional novel analog simulation experiment device |
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