CN104458418A - Working face coal wall stability control simulation experiment table and application method - Google Patents
Working face coal wall stability control simulation experiment table and application method Download PDFInfo
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- CN104458418A CN104458418A CN201410769492.0A CN201410769492A CN104458418A CN 104458418 A CN104458418 A CN 104458418A CN 201410769492 A CN201410769492 A CN 201410769492A CN 104458418 A CN104458418 A CN 104458418A
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- 239000003245 coal Substances 0.000 title claims abstract description 44
- 238000004088 simulation Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000002474 experimental method Methods 0.000 claims abstract description 28
- 238000005065 mining Methods 0.000 claims abstract description 23
- 239000011521 glass Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 239000010440 gypsum Substances 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000009472 formulation Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 238000004901 spalling Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The invention discloses a working face coal wall stability control simulation experiment table and an application method. The working face coal wall stability control simulation experiment table comprises a base mechanism, a bearing mechanism and a pressurizing mechanism, wherein the base mechanism is provided with a base, a slope adjustment jack, connecting groove holes and a connecting shaft; the bearing mechanism is provided with a bearing platform, a side protection plate, an ear ring, a rear cover, an organic glass baffle, a hydraulic support, reverse connecting groove holes, connecting holes, screw holes and screw rod angle steel; the pressurizing mechanism is provided with a cross beam, a longitudinal beam, a loading jack, a loading plate, a pull rod, pull rod connecting holes and a fastening nut. According to the invention, by the efficient matching of the base mechanism, the bearing mechanism and the pressurizing mechanism, coal wall deformation and damage characteristics with different mining height, different coal body intensity, different hydraulic support working resistance and different roof pressure can be obtained in an experiment, and the relationship of the accurate measurement of the coal wall stability with the mining height, the coal body intensity, the hydraulic support operation resistance and the roof pressure is achieved, the basis for the coal wall spalling prevention and control, stope roof load estimation, three-machine matched model selection and the like is provided, and the safe and efficient mining of a coal mining working face is realized.
Description
Technical field
The present invention relates to mining engineering and technology field, particularly relate to a kind of working face wall stability control simulation experiment table and application process.
Background technology
In recent years, along with improving constantly of comprehensive mechanization level, mining height workface technology becomes the important development direction of China's thick coal-layer mining gradually.Along with one time, longwall face extraction thickness is increasing, the strength increases of exploitation is high, the raising of mining rate has also caused some new problems, and coal wall caving, face roof-fall accident frequently occur, and becomes restriction large-mining-height working surface safety, the efficient key factor advanced fast.Coal wall caving not only can have influence on normally carrying out of safety in production, also can cause serious threat to the personal safety of workman in stope simultaneously.Therefore, the control of rib stability is the emphasis of Coal Face with Greater Mining Height Surrounding Rock Control.Both at home and abroad the research of rib stability is mostly concentrated on theoretical analysis and numerical simulation and a small amount of two dimensional surface physical model, seldom systematic study is carried out on the lower working face wall stability of each factor impact.Based on above-mentioned situation, in the urgent need to a kind of rib stability control simulation experiment table, reach the relation accurately measured between rib stability and mining height, coal mass strength, hydraulic support working resistance, roof pressure, determine under certain roof pressure and coal mass strength, keep rib stability reasonable mining height, hydraulic support working resistance, for coal wall caving control, the estimation of Stope roof load, three machine multiplication strains etc. provide foundation, realize coal-face safety and high efficiency.
Summary of the invention
The object of the embodiment of the present invention is to propose a kind of working face wall stability control simulation experiment table, pass through foundation means, load carrier, the efficient cooperation of pressing mechanism, different mining height can be obtained in experiment, different coal mass strength, different hydraulic support working resistance, rib deformation and failure characteristics under different roof pressure, reach and accurately measure rib stability and mining height, coal mass strength, hydraulic support working resistance, relation between roof pressure, determine the reasonable mining height keeping rib stability under certain roof pressure and coal mass strength, hydraulic support working resistance, for coal wall caving control, Stope roof load is estimated, three machine multiplication strains etc. provide foundation, realize workplace safety and high efficiency.To achieve these goals, the present invention adopts following technical scheme:
A kind of working face wall stability control simulation experiment table, comprising:
Foundation means, comprises pedestal, oblique adjusting lifting jack, connects slotted eye, coupling shaft, load carrier, comprises plummer, side guard plate, earrings, back cover, organic glass baffle plate, hydraulic support, instead connects slotted eye, connecting hole, screw, screw rod, angle steel, pressing mechanism, comprise crossbeam, longeron, load lifting jack, load plate, pull bar, pull bar connecting hole, clamp nut, described oblique adjusting lifting jack bottom is connected with both sides, pedestal rear portion, top is connected with plummer, described pedestal utilizes connection slotted eye to be tied by coupling shaft and plummer front end hinge with the anti-slotted eye that is connected, described side guard plate is welded with plummer by angle steel, described earrings is welded in side guard plate upper end, described back cover utilizes screw screw rod to be connected on rear side of side guard plate, described organic glass baffle plate utilizes screw screw rod to be connected on front side of side guard plate, described crossbeam welds with side guard plate, described longeron rear end is connected with pull bar upper end by pull bar connecting hole and clamp nut with beam welding front end, described pull bar lower end is connected with plummer front end by connecting hole and clamp nut, just be connected with load plate with longitudinal beam welding lower end in the middle part of described loading lifting jack, described hydraulic support is placed in load plate bottom, plummer front end next-door neighbour's organic glass baffle plate.
Preferably, described loading lifting jack is placed in the middle part of longeron, carries out Self-pressurizing agri by load plate to simulation rib.
Preferably, described load plate material is high strength height rigid steel plates, and its forward edge flushes with in the middle part of side guard plate, and rear portion is concordant with hydraulic support afterbody, and left and right and side guard plate stay certain distance.
Preferably, described side guard plate material high strength height rigid steel plates, its rear end is concordant with plummer, and front end is concordant with in the middle part of plummer.
Preferably, described hydraulic support is made by high-strength stainless steel, experimentally requires to have certain setting load, and shows the working resistance of support by the compression deformation of pillar.
Preferably, described back cover utilizes periphery screw and side guard plate rear end screw to be connected to side guard plate rear end by screw rod, experimentally requires when air-dry empirical model, and dismounting back cover, loads onto back cover during loading.
Preferably, described organic glass baffle plate utilizes organic glass baffle plate periphery screw and side guard plate front end screw to be connected to side guard plate front end by screw rod, can experimentally require to carry out installing, dismantling.
The invention allows for a kind of working face wall stability control simulation experiment table application process, apply above-mentioned experiment table, it comprises following job step:
Carry out safety inspection to each parts of experiment table before a, experiment, get rid of potential safety hazard, regulation experiment platform is to requirement of experiment state;
B, according to requirement of experiment and similar proportion, utilize the material formulation such as sand, gypsum, lime, water simulation coal body material;
C, than the specification of 1:5 ~ 1:20, the simulation coal body material of preparation is put into the space formed by plummer, side guard plate, organic glass baffle plate, load plate according to geometric similarity;
D, to utilize load lifting jack and will simulate the compacting of coal body material by load plate according to requirement of experiment, standing within 12 hours, treat that rib is shaping, dismounting organic glass baffle plate and rear cowl carry out air-dry;
E, after model is air-dry, loads onto back cover and recover the original boundary condition of rib hydraulic support is placed in rib front end, and give certain setting load;
F, utilize and load lifting jack and by load plate, simulation coal body material is pressurizeed step by step, the relation simultaneously between observed and recorded rib deformation and failure characteristics and on-load pressure, hydraulic support working resistance;
G, carry out different mining height, different coal mass strength, different hydraulic support working resistance, different roof pressure combination repeat step b to f;
H, test complete, cleaning experiment table, arranges rib deformation and failure characteristics under different mining height, different coal mass strength, different hydraulic support working resistance, different roof pressure.
Compared with existing relevant apparatus, tool of the present invention has the following advantages:
The working face wall stability control simulation experiment table that the present invention addresses, oblique adjusting lifting jack can adjustment model angle simulation different coal inclination angle under rib stress; Organic glass baffle plate vertical direction has rule, and carrier-table surface has rule in vertical organic glass baffle plate direction, can respectively experiments of measuring time rib the vertical and amount of moving horizontally; Plummer utilizes load plate to pass through to load lifting jack compacting simulation coal body material, and can give rib different roof pressures when testing, by the efficient cooperation of foundation means, load carrier, pressing mechanism, rib deformation and failure characteristics under different mining height, different coal mass strength, different hydraulic support working resistance, different roof pressure can be obtained in experiment, reach the relation accurately measured between rib stability and mining height, coal mass strength, hydraulic support working resistance, roof pressure, ensure the object of coal-face safety and high efficiency.
Accompanying drawing explanation
Fig. 1 is the part diagram of working face wall stability control simulation experiment table in the embodiment of the present invention.
Fig. 2 is the one-piece construction figure of working face wall stability control simulation experiment table in the embodiment of the present invention.
Fig. 3 is the working state figure of working face wall stability control simulation experiment table in the embodiment of the present invention.
Embodiment
Shown in composition graphs 1, Fig. 2, a kind of working face wall stability control simulation experiment table, comprise foundation means, load carrier, pressing mechanism and data collection and analysis mechanism, by the efficient cooperation of each mechanism, rib deformation and failure characteristics under different mining height, different coal mass strength, different hydraulic support working resistance, different roof pressure can be measured.
In foundation means, described oblique adjusting lifting jack 12 bottom is connected with both sides, pedestal 11 rear portion, and top is connected with plummer 21, and described pedestal 11 utilizes connection slotted eye 13, the anti-slotted eye 29 that connects is tied by coupling shaft 4 and plummer 21 front end hinge;
In load carrier, described side guard plate 26 is welded with plummer 21 by angle steel 28, described earrings 30 is welded in side guard plate 26 upper end, described back cover 25 utilizes screw 24 screw rod to be connected on rear side of side guard plate 26, described organic glass baffle plate 27 utilizes screw 24 screw rod to be connected on front side of side guard plate 26, and described hydraulic support 23 is placed in load plate 37 bottom, plummer 21 front end next-door neighbour's organic glass baffle plate 27;
In pressing mechanism, described crossbeam 36 welds with side guard plate 26, described longeron 33 rear end and crossbeam 36 are welded front end and are connected with pull bar 32 upper end by pull bar connecting hole 34 and clamp nut 31, described pull bar 32 lower end is connected with plummer 21 front end by connecting hole 22 and clamp nut 31, welds lower end be just connected with load plate 37 in the middle part of described loading lifting jack 35 with longeron 33.
Shown in composition graphs 3, first experimentally require to assemble experiment table successively according to the order of first foundation means then load carrier then pressing mechanism, and check the reliability of each mechanism; Then material sand, gypsum, lime, water mixed puts into lab space by the back cover 25 opened, and controls composite material height by the rule on organic glass baffle plate 27 surface; Then pressing mechanism compacting simulation coal body material; After simulation coal body forming materials, again utilize pressing mechanism to pressurize step by step, the vertical and Horizontal Deformation amount of observational record simultaneously and destructiveness, finally draw corresponding conclusion.
Its experimental procedure is roughly as follows:
Carry out safety inspection to each parts of experiment table before a, experiment, get rid of potential safety hazard, regulation experiment platform is to requirement of experiment state;
B, utilize sand, gypsum, lime, water according to requirement of experiment and similar proportion, preparation simulation coal body material;
C, than the specification of 1:5 ~ 1:20, the simulation coal body material of preparation is put into the space formed by plummer 21, side guard plate 26, organic glass baffle plate 27, back cover 25 according to geometric similarity;
D, utilizing according to requirement of experiment load plate 37 will simulate the compacting of coal body material by loading lifting jack 35, standingly within 12 hours, treating that rib is shaping, dismounting organic glass baffle plate 27 and back cover 25 carry out air-dry;
E, after model is air-dry, close back cover 25, hydraulic support 23 is placed in rib front end, and gives certain setting load;
F, utilize and load lifting jack 35 and by load plate 37, simulation coal body material is pressurizeed step by step, the relation simultaneously between observed and recorded rib deformation and failure characteristics and on-load pressure and hydraulic support 23 working resistance;
G, carry out different mining height, different coal mass strength, different hydraulic support working resistance, different roof pressure combination repeat step b to f;
H, test complete, cleaning experiment table, arranges rib deformation and failure characteristics under different mining height, different coal mass strength, different hydraulic support working resistance, different roof pressure.
Certainly; more than illustrate and be only preferred embodiment of the present invention; the present invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this instructions; the all equivalent replacement made, obviously form of distortion, within the essential scope all dropping on this instructions, ought to be subject to protection of the present invention.
Claims (8)
1. a working face wall stability control simulation experiment table, is characterized in that: described working face wall stability control simulation experiment table comprises:
Foundation means, comprises pedestal, oblique adjusting lifting jack, connects slotted eye, coupling shaft, load carrier, comprises plummer, side guard plate, earrings, back cover, organic glass baffle plate, hydraulic support, instead connects slotted eye, connecting hole, screw, screw rod, angle steel, pressing mechanism, comprise crossbeam, longeron, load lifting jack, load plate, pull bar, pull bar connecting hole, clamp nut, described oblique adjusting lifting jack bottom is connected with both sides, pedestal rear portion, top is connected with plummer, described pedestal utilizes connection slotted eye to be tied by coupling shaft and plummer front end hinge with the anti-slotted eye that is connected, described side guard plate is welded with plummer by angle steel, described earrings is welded in side guard plate upper end, described back cover utilizes screw screw rod to be connected on rear side of side guard plate, described organic glass baffle plate utilizes screw screw rod to be connected on front side of side guard plate, described crossbeam welds with side guard plate, described longeron rear end is connected with pull bar upper end by pull bar connecting hole and clamp nut with beam welding front end, described pull bar lower end is connected with plummer front end by connecting hole and clamp nut, just be connected with load plate with longitudinal beam welding lower end in the middle part of described loading lifting jack, described hydraulic support is placed in load plate bottom, plummer front end next-door neighbour's organic glass baffle plate.
2. working face wall stability control simulation experiment table according to claim 1, is characterized in that: described loading lifting jack is placed in the middle part of longeron, carries out automatic microcomputer control pressurization by load plate to simulation rib.
3. working face wall stability control simulation experiment table according to claim 1, it is characterized in that: described load plate material is high strength height rigid steel plates, its rear part edge flushes with in the middle part of side guard plate, and anterior concordant with hydraulic support afterbody, left and right and side guard plate stay certain distance.
4. working face wall stability control simulation experiment table according to claim 1, is characterized in that: described side guard plate material high strength height rigid steel plates, its rear end is concordant with plummer, and front end is concordant with in the middle part of plummer.
5. working face wall stability control simulation experiment table according to claim 1, it is characterized in that: described hydraulic support is made by high-strength stainless steel, and experimentally requirement can provide certain setting load, and show the working resistance of support by the compression deformation of pillar.
6. working face wall stability control simulation experiment table according to claim 1, it is characterized in that: described back cover utilizes periphery screw and side guard plate rear end screw to be connected to side guard plate rear end by screw rod, experimentally require when air-dry empirical model, dismounting back cover, loads onto back cover during loading.
7. working face wall stability control simulation experiment table according to claim 1, it is characterized in that: described organic glass baffle plate utilizes organic glass baffle plate periphery screw and side guard plate front end screw to be connected to side guard plate front end by screw rod, can experimentally require to carry out installing, dismantling.
8. a working face wall stability control simulation experiment table application process, is characterized in that, adopts the working face wall stability control simulation experiment table as described in any one of claim 1 to 7, comprises the steps:
Carry out safety inspection to each parts of experiment table before a, experiment, get rid of potential safety hazard, regulation experiment platform is to requirement of experiment state;
B, according to requirement of experiment and similar proportion, utilize the material formulation such as sand, gypsum, lime, water simulation coal body material;
C, than the specification of 1:5 ~ 1:20, the simulation coal body material of preparation is put into the space formed by plummer, side guard plate, organic glass baffle plate, load plate according to geometric similarity;
D, to utilize load lifting jack and will simulate the compacting of coal body material by load plate according to requirement of experiment, standing within 12 hours, treat that rib is shaping, dismounting organic glass baffle plate and rear cowl carry out air-dry;
E, after model is air-dry, loads onto back cover and recover the original boundary condition of rib hydraulic support is placed in rib front end, give certain setting load simultaneously;
F, utilize and load lifting jack and by load plate, simulation coal body material is pressurizeed step by step, the relation simultaneously between observed and recorded rib deformation and failure characteristics and on-load pressure, hydraulic support working resistance;
G, carry out different mining height, different coal mass strength, different hydraulic support working resistance, different roof pressure combination repeat step b to f;
H, test complete, cleaning experiment table, arranges rib deformation and failure characteristics under different mining height, different coal mass strength, different hydraulic support working resistance, different roof pressure.
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| CN105044305A (en) * | 2015-06-25 | 2015-11-11 | 中国矿业大学(北京) | Experimental device for forecasting overlying strata breakage of coal mine |
| CN105445176A (en) * | 2015-12-14 | 2016-03-30 | 榆林学院 | Apparatus for evaluating concrete endurance under pressure |
| CN105784405A (en) * | 2016-05-06 | 2016-07-20 | 徐州工程学院 | Targeted false rock wall used for experiment of mine excavation equipment |
| CN105956304A (en) * | 2016-05-05 | 2016-09-21 | 西安科技大学 | Method and apparatus for determining rated bearing load of bracket for working face with large mining height in coal mine |
| CN106401624A (en) * | 2016-11-01 | 2017-02-15 | 贵州大学 | Working surface coal wall flexible reinforcement experimental system and reinforcement method |
| CN108508184A (en) * | 2018-04-09 | 2018-09-07 | 山东科技大学 | A kind of complex conditions seam mining subsidence analog simulation experimental rig and method |
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| CN109142053A (en) * | 2018-08-20 | 2019-01-04 | 山东科技大学 | The movement prominent test method of lower coal body is adopted in coal seam permeability influence |
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| CN105445176B (en) * | 2015-12-14 | 2019-01-15 | 榆林学院 | One kind having concrete durability evaluation appts in the case of pressure |
| CN105445176A (en) * | 2015-12-14 | 2016-03-30 | 榆林学院 | Apparatus for evaluating concrete endurance under pressure |
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| CN108508184A (en) * | 2018-04-09 | 2018-09-07 | 山东科技大学 | A kind of complex conditions seam mining subsidence analog simulation experimental rig and method |
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