CN103399139B - A kind of open air trestle production model test method and pilot system thereof - Google Patents
A kind of open air trestle production model test method and pilot system thereof Download PDFInfo
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Abstract
The invention provides a kind of open air trestle production model test method, comprise the following steps: 1) modelling; 2) simulation mining: be divided into two stages: 1. expand the side formula strip mining transformation stage; 2. the sublevel caving method without sill pillar underground mining stage; 3) simulation mining process of the test monitoring: carry out ess-strain monitoring and displacement monitoring respectively.Additionally provide a kind of open air trestle production model pilot system, comprise modelling system and model assay system: described modelling system comprises building block making apparatus, building block cementing agent and model framework; Model assay system comprises ess-strain monitoring means and displacement monitoring unit.Beneficial effect of the present invention: solve high severe, low deformation modulus, the analog material building block of low-intensity rock ore deposit be difficult to shaping and frangible problem; Develop feasible model assay systems; Contents for Monitoring system is convenient; Take into full account and expand side formula strip mining transformation and two stages of sublevel caving method without sill pillar underground mining, improve test reliability.
Description
Technical field
The present invention relates to all kinds of Geotechnical Engineering physical experiments fields of outdoor, underground mining or rock excavation, be specifically related to a kind of open air trestle production model test method and pilot system thereof.
Background technology
Open air trestle exploitation is the inexorable trend of Open Pit Mines At Home And Abroad development, in recovery process, high steep open slope and underground mining influence each other and restrict, the existence of high steep open slope affects the safety of underground mining, underground mining can affect the stable of slope project equally, and its mechanism that influences each other is the basis and the theoretical foundation that ensure high gradient slope and underground mining stope stable (Mine Safety in Production).
Research method at present for Geotechnical Engineering field mainly contains three kinds: site test, model experiment and numerical simulation.The weak point of site test is that the test period is long, experimentation cost is high, be difficult to find two identical test conditions, and site test is difficult to carry out the test jobs such as effective ess-strain, displacement, lumpiness statistics, thus, site test also rests at present in phenomenological research, disclose phenomenon inherent law behind, just need to carry out indoor model test.Along with the growing of computing machine and the application rotatably descending Exploitation research in the open thereof, use mathematical model computer to study this problem, become a kind of development trend.Due to the complicacy of open air trestle mining effect factor, the reliability of numerical result is often difficult to ensure, this important means making model test become inspection and revise numerical evaluation.
By model test method, the mechanical characteristics of side slope and underground mining stope in open air trestle recovery process is studied, to influence each other mechanism to explore high steep open slope and underground mining, and then instruct the highly effective and safe of mining production to carry out.The research method of model experiment can overcome site test and expend greatly, and affect the shortcoming of normal order of work, the data obtained can be used for Instructing manufacture again, the analysis of the combination of qualitative and quantitative analysis of the Study of the Realization result, thus has important theory and practice meaning.
The making of production model, the effectively utilization of monitoring method and the design of Excavation simulation scheme are the difficulties in model test, govern the application of open air trestle production model test, for obtaining the expected result of open air trestle production model test, must develop and a set ofly meet simulated condition and model test method and the system of recovery process can be realized comparatively truly.
Summary of the invention
The key technical problem that the present invention will solve is, for above-mentioned difficult point, provides a kind of open air trestle production model test method and pilot system thereof.
The present invention for solving the problems of the technologies described above adopted technical scheme is:
A kind of open air trestle production model test method, comprises the following steps:
1) modelling: the complex geological structure of reasonable generalization (simulation) ore body prototype and subterranean strata syntagmatic, make the small scale open air trestle production model similar to mining area ore body prototype section, model section comprises the first rock mass, second rock mass of openpit both sides side slope, the first fault belt on first rock mass, the second fault belt on the second rock mass, and the ore body adopting bottom, hole; First rock mass, the second rock mass and ore body are piled up by the building block of corresponding analog material respectively and are formed, and between the first rock mass, the second rock mass, to form high gradient slope domatic for edge in opposite directions;
2) simulation mining: be divided into two stages: 1. expand side formula strip mining transformation, adopt the mode manually pumping building block, forms V-shape exploitation from the centre of production model to both sides and depth direction expansion; 2. sublevel caving method without sill pillar underground mining, Manual drilling rig is adopted slowly at the uniform velocity to bore the mode of broken building block, ore limits along production model is exploited to the east of western segmentation, after every excavation section by section completes, the goaf of the building block making brill broken filling mining model naturally, to be deformed stable, the more lower one deck ore body of excavation;
3) simulation mining process of the test monitoring: arrange many group stress monitoring points and monitoring point for displacement on overall production model surface, while production model carries out simulation mining, respectively ess-strain monitoring and displacement monitoring are carried out to each group of stress monitoring point and monitoring point for displacement, and record the ess-strain value of each group of stress monitoring point and the displacement deformation value of each group monitoring point for displacement, obtain stress and the deformation behaviour of side slope and underground mining stope country rock, thus the impact that analysis section stress causes Stability of underground stope with distortion.
By such scheme, described production model adopts concrete block masonry method to build by laying bricks or stones by multiple building block and forms, specifically comprise following operation:
A, the model section chosen according to step 1) and step 2) simulation mining conceptual design go out model and build design drawing by laying bricks or stones, and on figure, indicate particular location and the size of production model first rock mass, the second rock mass and ore body;
B, to build design drawing requirement by laying bricks or stones according to model by building block numbering, excision forming polishing flat;
C, arrange building construction line, mark out the first rock mass, the second rock mass and the building block of ore body each several part accurately build position and the first fault belt, the second fault belt reserved location (size of each building block need consider the complexity that the needs of experimental study and building block make maintenance) by laying bricks or stones;
D, to fix 2 pieces of inside surfaces (film is for the ease of form removal with the plank of film along building construction line, prevent sticking to mould), what the first rock mass, the second rock mass and the building block of ore body each several part are deposited into above-mentioned operation c marks accurately builds position by laying bricks or stones, then building block cementing agent (white glue with vinyl cementing agent) is evenly poured into the surface of contact between adjacent block, after building block cementing agent (white glue with vinyl) condensation, remove plank; Domatic and the ore body (in building process, the strict putting position controlling building block, reduces deviation) of the first rock mass, the second rock mass, high gradient slope is built successively by laying bricks or stones according to this operation;
After e, concrete block masonry complete, the fault simulation material of the first fault belt, the second fault belt and packing material are inserted successively the first fault belt, the second fault belt reserved location reserved, described fault simulation material is polypropylene film, and packing material is clay (tomography fills in process and should note not polluting or damage the building block around tomography);
After f, production model integral manufacturing complete, first smear the thick powder of lacquer putty for use on of one deck 0.5mm at production model surface uniform, after powder of lacquer putty for use on is air-dry, on the first rock mass of production model, the second rock mass and ore body, brushes the latex paint of one deck different colours respectively;
G, check whether overall production model relative mining area ore body prototype meets topomap and ratio of similitude requirement, if meet the demands, whole production model completes.
By such scheme, stress monitoring point in described step 3) comprises foil gauge monitoring point and soil pressure cell monitoring point, foil gauge monitoring point is located in the building block of both sides, front and back of production model, soil pressure cell monitoring point be located at the high gradient slope of production model both sides domatic on, foil gauge monitoring point and soil pressure cell monitoring point are monitored respectively by foil gauge and soil pressure cell.
By such scheme, monitoring point for displacement in described step 3) comprises dial gauge monitoring point, camera monitoring point, dial gauge monitoring point is located at that the high gradient slope of production model is domatic, top, slope, toe and ore body top ± 0cm place, dial gauge monitoring point employing dial gauge is monitored, camera monitoring point is arranged in the following way: ejecting horizontal spacing with ink fountain on the surface of production model is 10cm, vertical spacing is the mesh lines of 4cm, horizontal, the intersection point of vertical mesh lines is as camera monitoring point (being convenient to the deformation values observing production model), camera monitoring point adopts camera to carry out Digital photographic measurement, camera support is fixed on the fixed position in facade dead ahead on front side of production model, keep the sight line level of camera, often exploit and namely carry out one group after a step completes and take pictures, record the accurate location of camera monitoring point in each group of photograph, measure software analysis by Digital photographic and calculate position, the camera monitoring point delta data recorded in each stage photograph, obtain whole field deformation and the surface displacement situation of change of the rear production model of each step exploitation.
Present invention also offers a kind of for the open air trestle production model pilot system in above-mentioned model test, comprise modelling system and model assay system:
A, described modelling system, for making production model to be tested, comprise building block making apparatus, building block cementing agent and model framework;
Described building block making apparatus is for making building block, make mould, double stroke jack, hydraulic oil pump and reaction frame by building block to form, during work, building block makes mould and is placed on reaction frame, double stroke jack is located at building block and is made on mould, and double stroke jack is connected with hydraulic oil pump, the bottom of double stroke jack is also provided with bearing plate, for the power on double stroke jack being evenly applied to the building block in building block making mould; Described building block cementing agent adopts white glue with vinyl cementing agent; Described model framework is channel-section steel structure, and the bottom of model framework lays 15mm steel plate and installation foot supports fixing; Leading flank is provided with the thick transparent toughened glass of dismountable 8mm; Trailing flank arranges two vertical steels along model framework horizontal direction and vertical direction respectively and supports and a horizontal bracing members in the middle part of model framework, with maintain model framework structural stability and for the Magnetic gauge stand of fixing dial gauge; The thick steel plate of 12mm is all installed with fixed pan model right boundary to apply lateral confinement on the left of model framework and right side.
B, described model assay system, for monitoring ess-strain and the displacement deformation of production model, comprise ess-strain monitoring means and displacement monitoring unit;
Described ess-strain monitoring means adopts DH-3815N static strain testing system, described static strain testing system comprises strain transducer and data acquisition device, described strain transducer comprises foil gauge and soil pressure cell, described foil gauge is located in the building block of both sides, front and back of production model, described soil pressure cell be located at the high gradient slope of production model both sides domatic on, foil gauge is all connected with data acquisition device with soil pressure cell;
Described displacement monitoring unit is made up of dial gauge and camera, dial gauge is located at that the high gradient slope of production model is domatic, top, slope, toe and ore body top ± 0cm place, the Magnetic gauge stand of dial gauge is fixed in the two vertical steels supports and a horizontal bracing members that arrange in the middle part of model framework; The dead ahead of model framework is located at by camera, and the camera monitoring point that camera and model framework are laid keeps sight line level, multiple point of intersection (being convenient to the deformation values observing production model) of the mesh lines of the horizontal spacing 10cm that described camera layout of the monitoring points ejects in production model surface, vertical spacing 4cm.
By such scheme, described building block makes mould and comprises 2 covers, and the interior bulk that 2 cover building blocks make mould is respectively 200mm × 200mm × 200mm and 200mm × 100mm × 150mm.
By such scheme, the inside dimension of described model framework is that 2400mm × 200mm × 1450mm(is long × wide × high).
When making building block, the mix proportion scheme first determined according to proportioning test takes the analog material compound of each building block, again by compound at twice mix evenly form analog material (because in similar material mixture, water cut is less, compound is easily coupled to coccoid and workability is poor), a kind of open air trestle production model test ore deposit rock analog material that the patent that the analog material preparing building block is Authorization Notice No. CN102701696B provides.Then the analog material mixed is poured into corresponding building block and make tamping in mould, finally by bearing plate, building block is pressed into level altitude with double stroke jack, form removal after five minutes, building block and plastic, building block after shaping dries 12 hours under being first placed in room temperature, then puts into baking oven maintenance 3 days under constant temperature 35 degree.In the process making all kinds of building block, each stages operating duration of each building block should be made equal, to guarantee the stable performance of each building block as far as possible.
The present invention has following beneficial effect:
(1) by modelling system, establish rational physical model, comparatively complex geological structure and subterranean strata syntagmatic can be simulated more all sidedly, truly, produce the small scale open air trestle production model that severe is large, Strength and Dformation modulus is low, elastoplasticity is similar to prototype, solve high severe, low deformation modulus, the analog material building block of low-intensity rock ore deposit be difficult to shaping and frangible problem, guarantee to meet the successful making that ratio of similitude requires block mold;
(2) the main measurement content of model test is ess-strain and the deformation values at each position of model, needs to monitor the macroscopic deformation of block mold and breakoff phenomenon, record and describe simultaneously; By model assay system, traditional displacement and ess-strain contact method for measurement and emerging close shot deformation measurement combine with technique are got up, still jejune shortcoming is used in the test of the limitation and Photogrammetry technology that overcome contact method for measurement point layout, ensure that Contents for Monitoring system in test monitored over time process, method are convenient, reliable results;
(3) simulation mining method has taken into full account the process characteristic expanding side formula strip mining transformation and sublevel caving method without sill pillar underground mining, rotatably can descend the operating mode of comparatively true these two-stage mining methods of reasonably simulation in production model process of the test in the open, improve the authenticity of process of the test and the reliability of achievement, ensure carrying out smoothly of model test, this system architecture is simple, with low cost, easy to make, workable, can be widely used in outdoor, in the Geotechnical Engineering physical experiments of underground mining or rock excavation, to announcement Caving Method with Large Space and the underground mining mechanism that influences each other, there is important supporting role, engineering practice directiveness is strong.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention production model and monitoring point distribution;
Fig. 2 is the structural representation of building block making apparatus of the present invention;
Fig. 3 is the structural representation of model framework of the present invention;
In figure, 1-first building block makes mould, and 2-second building block makes mould, 3-reaction frame, 4-double stroke jack, 5-hydraulic oil pump, 6-channel-section steel, 7-tempered glass.
Embodiment
Below in conjunction with embodiment and accompanying drawing, technical scheme of the present invention is further described in detail.
With reference to shown in Fig. 1 ~ Fig. 3, open air trestle production model pilot system of the present invention, comprises modelling system and model assay system:
A, described modelling system, for making production model to be tested, comprise building block making apparatus, building block cementing agent and model framework;
Described building block making apparatus is for making building block, mould 1 is made by the first building block, second building block makes mould 2, double stroke jack 4, hydraulic oil pump 5 and reaction frame 3 form, during work, first building block makes mould 1(or the second building block makes mould 2) be placed on reaction frame 3, double stroke jack 4 is located at the first building block and is made mould 1(or the second building block making mould 2) on, and double stroke jack 4 is connected with hydraulic oil pump 5, the bottom of double stroke jack 4 is also provided with bearing plate, make mould 1(or the second building block make mould 2 for the power on double stroke jack 4 being evenly applied to the first building block) in building block, the interior bulk that first building block makes mould 1 is 200mm × 200mm × 200mm, and the interior bulk that the second building block makes mould 2 is 200mm × 100mm × 150mm, described building block cementing agent adopts white glue with vinyl cementing agent, described model framework is channel-section steel structure, and main framework is that channel-section steel 6 is made, and the bottom of model framework lays 15mm steel plate and installation foot supports fixing, leading flank is provided with the thick transparent toughened glass 7 of dismountable 8mm, trailing flank arranges two vertical steels along model framework horizontal direction and vertical direction respectively and supports and a horizontal bracing members in the middle part of model framework, with maintain model framework structural stability and for the Magnetic gauge stand of fixing dial gauge, the thick steel plate of 12mm is all installed with fixed pan model right boundary to apply lateral confinement on the left of model framework and right side, the inside dimension of model framework is that 2400mm × 200mm × 1450mm(is long × wide × high).
B, described model assay system, for monitoring ess-strain and the displacement deformation of production model, comprise ess-strain monitoring means and displacement monitoring unit;
Described ess-strain monitoring means adopts DH-3815N static strain testing system, described static strain testing system comprises strain transducer and data acquisition device, described strain transducer comprises foil gauge and soil pressure cell, described foil gauge is located in the building block of both sides, front and back of production model, described soil pressure cell be located at the high gradient slope of production model both sides domatic on, foil gauge is all connected with data acquisition device with soil pressure cell;
Described displacement monitoring unit is made up of dial gauge and camera, dial gauge is located at that the high gradient slope of production model is domatic, top, slope, toe and ore body top ± 0cm place, the Magnetic gauge stand of dial gauge is fixed in the two vertical steels supports and a horizontal bracing members that arrange in the middle part of model framework; The dead ahead of model framework is located at by camera, and the camera monitoring point that camera and model framework are laid keeps sight line level, multiple point of intersection (being convenient to the deformation values observing production model) of the mesh lines of the horizontal spacing 10cm that described camera layout of the monitoring points ejects in production model surface, vertical spacing 4cm; Described camera and Digital photographic measure software and are connected.
When making building block, the mix proportion scheme first determined according to proportioning test takes the analog material compound of each building block, again by compound at twice mix evenly form analog material (because in similar material mixture, water cut is less, compound is easily coupled to coccoid and workability is poor), a kind of open air trestle production model test ore deposit rock analog material that the patent that the analog material preparing building block is Authorization Notice No. CN102701696B provides.Then the analog material mixed is poured into corresponding building block and make tamping in mould, finally by bearing plate, building block is pressed into level altitude with double stroke jack, form removal after five minutes, building block and plastic, building block after shaping dries 12 hours under being first placed in room temperature, then puts into baking oven maintenance 3 days under constant temperature 35 degree.In the process making all kinds of building block, each stages operating duration of each building block should be made equal, to guarantee the stable performance of each building block as far as possible.
To simulate the ore body prototype in Da Ye Iron Mine, first rock mass of both sides, pit side slope is north side diorite, second rock mass is south side marble, the first corresponding fault belt is F9 fault belt, second fault belt is F25 fault belt, ore body is iron ore body, and open air trestle production model test method of the present invention, comprises the following steps:
1) modelling: the complex geological structure of reasonable generalization (simulation) ore body prototype and subterranean strata syntagmatic, make the small scale open air trestle production model that severe is large, Strength and Dformation modulus is low, elastoplasticity is similar to mining area ore body prototype section, model section comprises north side diorite, the south side marble of openpit both sides side slope, F25 fault belt on F9 fault belt on north side diorite, south side marble, and adopt the iron ore body of bottom, hole; North side diorite, south side marble are piled up by the building block of corresponding analog material respectively with iron ore body and are formed, north side diorite and southern to help between marble edge in opposite directions to form high gradient slope domatic;
2) simulation mining: be divided into two stages: 1. expand side formula strip mining transformation, adopt the mode manually pumping building block, forms V-shape exploitation from the centre of production model to both sides and depth direction expansion; 2. sublevel caving method without sill pillar underground mining, Manual drilling rig is adopted slowly at the uniform velocity to bore the mode of broken building block, ore limits along production model is exploited to the east of western segmentation, after every excavation section by section completes, the goaf of the building block making brill broken filling mining model naturally, to be deformed stable, the more lower one deck ore body of excavation;
3) production model is monitored: arrange many group stress monitoring points and monitoring point for displacement on overall production model surface, while production model carries out simulation mining, respectively ess-strain monitoring and displacement monitoring are carried out to each group of stress monitoring point and monitoring point for displacement, and record the ess-strain value of each group of stress monitoring point and the displacement deformation value of each group monitoring point for displacement, obtain stress and the deformation behaviour of side slope and underground mining stope country rock, thus the impact that analysis section stress causes Stability of underground stope with distortion:
1. stress monitoring point comprises foil gauge monitoring point and soil pressure cell monitoring point, foil gauge monitoring point is located in the building block of both sides, front and back of production model, soil pressure cell monitoring point be located at the high gradient slope of production model both sides domatic on, foil gauge monitoring point and soil pressure cell monitoring point are monitored respectively by foil gauge and soil pressure cell.
2. monitoring point for displacement comprises dial gauge monitoring point, camera monitoring point, dial gauge monitoring point is located at that the high gradient slope of production model is domatic, top, slope, toe and ore body top ± 0cm place, dial gauge monitoring point employing dial gauge is monitored, camera monitoring point is arranged in the following way: ejecting horizontal spacing with ink fountain on the surface of production model is 10cm, vertical spacing is the mesh lines of 4cm, horizontal, the intersection point of vertical mesh lines is as camera monitoring point (being convenient to the deformation values observing production model), camera monitoring point adopts camera to carry out Digital photographic measurement, camera support is fixed on the fixed position in facade dead ahead on front side of production model, keep the sight line level of camera, often exploit and namely carry out one group after a step completes and take pictures, record the accurate location of camera monitoring point in each group of photograph, measure software analysis by Digital photographic and calculate position, the camera monitoring point delta data recorded in each stage photograph, obtain whole field deformation and the surface displacement situation of change of the rear production model of each step exploitation.
Described production model adopts concrete block masonry method to build by laying bricks or stones by multiple building block and forms, specifically comprise following operation:
A, the model section chosen according to step 1) and step 2) simulation mining conceptual design go out model and build design drawing by laying bricks or stones, and on figure, indicate particular location and the size of production model north side diorite, south side marble and iron ore body;
B, to build design drawing requirement by laying bricks or stones according to model by building block numbering, excision forming polishing flat;
C, arrange building construction line, mark out north side diorite, south side marble and the building block of iron ore body each several part accurately build position and F9, F25 fault belt reserved location (size of each building block need consider the complexity that the needs of experimental study and building block make maintenance) by laying bricks or stones;
D, to fix 2 pieces of inside surfaces (film is for the ease of form removal with the plank of film along building construction line, prevent sticking to mould), being helped in north diorite, south side marble and the building block of iron ore body each several part to be deposited into, operation c marks accurately builds position by laying bricks or stones, then building block cementing agent (white glue with vinyl cementing agent) is evenly poured into the surface of contact between adjacent block, after white glue with vinyl condensation, remove plank; Domatic and the iron ore body (in building process, the strict putting position controlling building block, reduces deviation) of north side diorite, south side marble, high gradient slope is built successively by laying bricks or stones according to this operation;
After e, concrete block masonry complete, the fault simulation material of F9, F25 fault belt and packing material are inserted successively F9, F25 fault belt reserved location reserved, described fault simulation material is polypropylene film, and packing material is clay (tomography fills in process and should note not polluting or damage the building block around tomography);
F, for strengthening the integrality of production model and rock mass discrimination, after production model integral manufacturing completes, first smear the thick powder of lacquer putty for use on of one deck 0.5mm at production model surface uniform, after powder of lacquer putty for use on is air-dry, in the north of production model side diorite, south side marble and iron ore body, brushes the latex paint of one deck different colours respectively;
G, check whether overall production model relative mining area ore body prototype meets topomap and ratio of similitude requirement, if meet the demands, whole production model completes.
Above-describedly be only preferred embodiment of the present invention; certainly the interest field of the present invention can not be limited with this; therefore adopt or similar process identical with this example, or according to the equivalence change that the present patent application the scope of the claims is done, still belong to protection scope of the present invention.
Claims (3)
1. an open air trestle production model test method, is characterized in that, comprises the following steps:
1) analogue formation: the complex geological structure of reasonable generalization ore body prototype and subterranean strata syntagmatic, make the small scale open air trestle production model similar to mining area ore body prototype section, model section comprises the first rock mass, second rock mass of openpit both sides side slope, the first fault belt on first rock mass, the second fault belt on the second rock mass, and the ore body adopting bottom, hole; First rock mass, the second rock mass and ore body are piled up by the building block of corresponding analog material respectively and are formed, and between the first rock mass, the second rock mass, to form high gradient slope domatic for edge in opposite directions;
Described production model adopts concrete block masonry method to build by laying bricks or stones by multiple building block and forms, specifically comprise following operation:
A, the model section chosen according to step 1) and step 2) simulation mining conceptual design go out model and build design drawing by laying bricks or stones, and on figure, indicate particular location and the size of production model first rock mass, the second rock mass and ore body;
B, to build design drawing requirement by laying bricks or stones according to model by building block numbering, excision forming polishing flat;
C, arrange building construction line, mark out the first rock mass, the second rock mass and the building block of ore body each several part accurately build position and the first fault belt, the second fault belt reserved location by laying bricks or stones;
D, to fix the plank of 2 pieces of inside surfaces with film along building construction line, what the first rock mass, the second rock mass and the building block of ore body each several part are deposited into above-mentioned operation c marks accurately builds position by laying bricks or stones, then building block cementing agent is evenly poured into the surface of contact between adjacent block, after the condensation of building block cementing agent, remove plank; Domatic and the ore body of the first rock mass, the second rock mass, high gradient slope is built successively by laying bricks or stones according to this operation;
After e, concrete block masonry complete, the fault simulation material of the first fault belt, the second fault belt and packing material are inserted successively the first fault belt, the second fault belt reserved location reserved, described fault simulation material is polypropylene film, and packing material is clay;
After f, production model integral manufacturing complete, first smear the thick powder of lacquer putty for use on of one deck 0.5mm at production model surface uniform, after powder of lacquer putty for use on is air-dry, on the first rock mass of production model, the second rock mass and ore body, brushes the latex paint of one deck different colours respectively;
G, check whether overall production model relative mining area ore body prototype meets topomap and ratio of similitude requirement, if meet the demands, whole production model completes;
2) simulation mining: be divided into two stages: 1. expand side formula strip mining transformation, adopt the mode manually pumping building block, forms V-shape exploitation from the centre of production model to both sides and depth direction expansion; 2. sublevel caving method without sill pillar underground mining, Manual drilling rig is adopted at the uniform velocity to bore the mode of broken building block, along production model ore limits from top to bottom, from east to west segmentation exploitation, after every excavation section by section completes, the goaf of the building block making brill broken filling mining model naturally, to be deformed stable, the more lower one deck ore body of excavation;
3) simulation mining process of the test monitoring: arrange many group stress monitoring points and monitoring point for displacement on overall production model surface, while production model carries out simulation mining, respectively ess-strain monitoring and displacement monitoring are carried out to each group of stress monitoring point and monitoring point for displacement, and record the ess-strain value of each group of stress monitoring point and the displacement deformation value of each group monitoring point for displacement, obtain stress and the deformation behaviour of side slope and underground mining stope country rock.
2. open air trestle production model test method as claimed in claim 1, it is characterized in that, stress monitoring point in described step 3) comprises foil gauge monitoring point and soil pressure cell monitoring point, foil gauge monitoring point is located in the building block of both sides, front and back of production model, soil pressure cell monitoring point be located at the high gradient slope of production model both sides domatic on, foil gauge monitoring point and soil pressure cell monitoring point are monitored respectively by foil gauge and soil pressure cell.
3. open air trestle production model test method as claimed in claim 1, it is characterized in that, monitoring point for displacement in described step 3) comprises dial gauge monitoring point, camera monitoring point, dial gauge monitoring point is located at that the high gradient slope of production model is domatic, top, slope, toe and ore body top ± 0cm place, dial gauge monitoring point employing dial gauge is monitored; Camera monitoring point is arranged in the following way: to eject on the surface of production model with ink fountain that horizontal spacing is 10cm, vertical spacing is the mesh lines of 4cm, the intersection point of horizontal, vertical mesh lines is as camera monitoring point, and camera monitoring point adopts camera to carry out Digital photographic measurement.
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