CN104504461A - Method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining - Google Patents

Method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining Download PDF

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CN104504461A
CN104504461A CN201410752016.8A CN201410752016A CN104504461A CN 104504461 A CN104504461 A CN 104504461A CN 201410752016 A CN201410752016 A CN 201410752016A CN 104504461 A CN104504461 A CN 104504461A
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slope
mining
simulation
numerical
pit
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邵安林
裴学斌
周仁杰
马旭峰
刘显峰
姜科
徐能雄
刘京平
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Angang Group Mining Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00Administration; Management
    • G06Q10/04Forecasting or optimisation, e.g. linear programming, "travelling salesman problem" or "cutting stock problem"
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06QDATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
    • G06Q50/02Agriculture; Fishing; Mining

Abstract

The invention relates to a method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining. The method is characterized in that numerical simulation analysis software FLAC<3D> is adopted, a slope numerical analysis mode is built, the simulation processes of layer mining, numerical calculation and land sliding are cyclically used, the continuously generated processes of stabilization, stability losing, land sliding and re-stabilization of the mine pit slope in the mining process are simulated, and further, the slope deformation destroy rule in the underground mining process is obtained. The method has the advantages that the influence degree of the mining on neighboring buildings and facilities is judged according to the mine pit slope destroy predication result, basis is provided for determining the removal range and the removal time, and in addition, reference is provided for reasonably laying out ground facilities to be built in the aspects of production, office, life and the like.

Description

Pit Prediction of Slope Deformation Destruction method is brought out in a kind of open air trestle exploitation
Technical field
The invention belongs to mining technique field, particularly relate to the exploitation of a kind of open air trestle and bring out pit Prediction of Slope Deformation Destruction method.
Background technology
China adopts outdoor mode to exploit the more country of iron ore, and more than 90% of self-produced iron ore comes from strip mining transformation.Through the exploitation of decades, most of surface mine enters the middle and later periods.Because Chinese large-sized iron ore-deposit majority is for tilting or high-dipping ore block, bury deepening comparatively large, the strip mining transformation degree of depth is more than after 300m ~ 400m, if proceed the exploitation of outdoor expansion side, unreasonable economically, land occupation is many, and causes larger ecological disruption.Therefore, most of outdoors iron ore will turn to underground mining after exploiting and terminating in the open.Such as, the mine such as mountain iron ore, Da Ye Iron Mine, stone people ditch iron ore, southern fragrant iron ore to be gone underground exploitation by strip mining transformation at the moment.The iron ore-deposit majority of open air trestle mining is high-dipping ore block, and orebody thickness is comparatively large, and belong to the special thick iron ore body of steep dip, underground mining affects significantly country rock and pit side slope.Under exploiting outdoor pit, ore body not only can bring out surface subsidence and cracking, affects the safety of above ground structure and facility; Also can cause by the further distortion and fragmentation of pit slope rock mass of strip mining transformation disturbance, cause slope instability and roadway deformation to destroy, impact safety in production.
For this reason, some scholars adopt the exploitation of the technique study such as numerical simulation and field monitoring open air trestle to bring out pit slope deformation destruction problem.Chen Maolin etc. for background with the exploitation of Da Ye Iron Mine open air trestle, use three-dimensional finite element to have studied first mining section and excavate the secondary change of stress field rule caused.The 2D-Block such as Liu Hui have studied the impact of Lion Rock exploiting field, Da Ye Iron Mine open air trestle exploitation on side slope.Sandibak studies avalanche exploitation and causes subsidence characteristic.Ma Tianhui etc. utilize MSC.PATRAN and MSC.NASTRAN to have studied the stability of Top Pillar When Coming into Underground Mining from Open-Pit in conjunction with stone people ditch iron ore.Han Xianmin etc. adopt finite element method to carry out sensibility analysis to the leading indicator affecting Open pit slope stability.The stability of slope problem that Elmo etc. and Vyazmensky etc. utilize finite element and discrete element coupling process to analyze open air trestle exploitation to cause.Vyazmensky etc. utilize finite element/discrete element mixed method to analyze rock mass structure to the impact of avalanche apparent mining damage, show that rock mass structure on mining subsidence impact significantly.Shi Xiuzhi etc., for the exploitation of Tonglushan Mine No. I ore body open air trestle, adopt FLAC3D to analyze the deformation and damage characteristics of goaf country rock under different spans and column thickness.Zhao Haijun etc., in conjunction with surface strata movement GPS Monitoring Data and FLAC3D numerical simulation, have studied the impact of imperial first ore deposit open air trestle exploitation on side slope rock stability, and inquire into Surrounding Rock Movement distortion, Stress Field Distribution and failure mechanism.Yang Wei etc. use FLAC to analyze the position of slope displacement field and stress field and possibility unstability in southern fragrant iron ore open air trestle recovery process.Wang Yunfei etc., in conjunction with PFC and analog material experiment, have studied failure law and the catastrophe mechanism of open air trestle exploitation slope body.Zhang Qinli etc., for certain mine open air trestle cut and fill, use MIDAS/GTS, analyze ground shift and deformation rule under different operating mode.Some scholars adopt model test method to study open air trestle mining rock stratum and move and slope deformation destruction rule.Combination model experiment and the mining measured results such as Sun Shiguo, inquire into the distortion and fragmentation mechanism of open air trestle exploitation slope rock mass.Two-dimentional similarity material test, for certain iron ore, has been carried out in Huangping roads etc., the distortion of research earth's surface and Surrounding Rock Movement rule.Zhang Yamin etc., for the first ore deposit of Jinchuan, according to GPS measured data, analyze the deformation rule that the region of high stress open air trestle exploitation of taking as the leading factor with horizontal structural s tress causes rock mass.Song Weidong etc. for background, adopt the method that the test of physical similarity material model and numerical simulation calculation combine with Panzhihua point mountain iron ore, have carried out systematic study to the failure mechanism of country rock in open air trestle recovery process and moving range.In strata movement and Slope Deformation Prediction, some scholars also inquire into.Li Wenxiu, for inclined thick gulf underground and outdoor unitized production Rock Displacement Movement problem, establishes the fuzzy mathematical model of Rock Displacement Movement and Analysis of Slope Stability.Li Changhong etc. propose a kind of open air trestle based on support vector machine exploitation slope Deformation Analysis model.Wang Yunfei etc., based on improvement support vector regression principle, establish the υ-SVR model that the lower open-pit slope of reflection mining disturbance impact is out of shape non-linear rule, and are applied to apricot mountain iron ore.Eberhardt et al., Beck and Pfitzner and Flores and Karzulovic utilizes the reciprocation of method for numerical simulation labor between surface mine and underground mining.Brummer et al. utilizes 3DEC to predict, and Palabora mine underground mining is on the impact of open-pit slope.
But, adopt that Non-sill-pillared sublevel caving exploitation steep dip special thick iron ore body will bring out ore body upper lower burrs country rock, top, goaf rock/ore body produces discontinuous, large deformation, Large travel range motion and destruction.Whether the research of forefathers is mainly paid close attention to the pit side slope in certain exploitation moment and is stablized, slope stability Numerical Analysis methods used is difficult to adapt to discontinuous, the large deformation of slope rock mass, Large travel range motion and destroys, and is difficult to simulate the cyclic process on " stable-unstability-landslide-stablize again " that pit side slope in recovery process continues to occur.
Summary of the invention
The present invention is directed to the problems referred to above, in conjunction with numerical value simulation-analysis software FLAC, propose the exploitation of a kind of open air trestle and bring out pit Prediction of Slope Deformation Destruction method.The method is by adopting numerical simulation analysis software FLAC 3Dby setting up the numerical analysis model of side slope, recycle simulation process " separate zone production-numerical evaluation-landslide ", simulate the process on " stable-unstability-landslide-stablize again " that pit side slope in recovery process continues to occur, and then draw slope deformation destruction rule in underground mining process.
The object of the invention is to be realized by following technical proposals:
Pit Prediction of Slope Deformation Destruction method is brought out in a kind of open air trestle exploitation of the present invention, it is characterized in that: adopt numerical simulation analysis software FLAC 3Dby setting up the numerical analysis model of side slope, recycle simulation process " separate zone production-numerical evaluation-landslide ", simulation pit side slope in recovery process continues the process on " stable-unstability-landslide-stablize again " occurred, and then draw slope deformation destruction rule in underground mining process, its step is as follows:
Select the I-I section of pit side slope as calculating section; Then, calculating section is split into triangle gridding; Each plane grid unit is drawn into tri-prism element by the normal direction again along section;
Current mined bed is n-th layer, n=1,2,3 ...,
1st step: simulation separate zone production, namely utilizes FLAC 3Din NULL order, delete the grid cell corresponding to n-th layer ore body, realize simulation mining n-th layer;
2nd step: utilize FLAC 3Dcarry out numerical simulation calculation, analysis of slope stability;
3rd step: if not restraining appears through plastic zone and calculate in side slope, then perform the 4th step and carry out (n+1)th layer of orebody mining, otherwise skip to the 1st step;
4th step: the displacement calculating each mesh node, and draw displacement isogram;
5th step: select one article of displacement isoline closest to border, plastic zone as slope sliding face, and using the region between slipping plane and side slope free face as sliding mass;
6th step: utilize NULL order to be deleted by the grid cell corresponding to slide mass, realizes landslide simulation;
7th step: restart stability of slope numerical simulation calculation;
8th step: if numerical simulation calculation convergence, then skip to the 1st step, otherwise skip to the 5th step.
The numerical analysis model setting up side slope of the present invention, concrete steps are as follows:
1. on calculating section, arrange tomography, separatrix, stratum, separate zone production boundary line in advance, when subdivision, these boundary lines are using the border as grid cell;
2. with above-mentioned boundary line for constraint, calculatings section is split into triangle gridding, and the length of side of the unit in region that requirement may be come down is 3m-5m, simulate come down time, cell configuration is equilateral triangle;
3. along calculate section normal direction by all triangles in the triangulation network all translation 20m become prismatic mesh;
4. according to the separate zone production boundary line pre-set, all unit to be exploited in each mined bed are weaved into one group.
Advantage of the present invention is:
(1) utilizing this patent to carry out open air trestle exploitation Analysis of Slope Stability, the deformation failure state of different mining phase pits side slope can be determined, for safety in production provides foundation, avoiding the casualties and property loss that cause because coming down;
(2) according to pit slope failure prediction achievement, judge that contiguous buildings or structures and facility are by mining effect, for the determination of resettlement scope and time to move provides foundation, and for reasonable Arrangement produce, office plans to build surface facility and provides reference with living etc.
Accompanying drawing explanation
Fig. 1 is Prediction of Slope Deformation Destruction flow process of the present invention.
Fig. 2 is the side slope I-I section as reference section that the present invention chooses.
Fig. 3 is the triangle gridding computation model generated according to I-I section.
Fig. 4 is mountain iron ore geological plane maps at the moment.
Namely Fig. 5 for having exploited side slope plastic zone after ground floor mineral ore after first time exploitation.
Namely Fig. 6 for having exploited side slope plastic zone after second layer mineral ore after second time exploitation.
Namely Fig. 7 for having exploited side slope plastic zone after third layer mineral ore after third time exploitation.
Fig. 8 is side slope plastic zone figure before first time landslide.
Fig. 9 is side slope plastic zone figure behind first time landslide.
Figure 10 for do not restrain when numerical simulation calculation and suspend calculating time side slope plastic zone figure, be also side slope plastic zone figure before second time landslide).
Slope displacement isogram when Figure 11 is not for restraining when numerical simulation calculation and suspending calculating.
Figure 12 is side slope plastic zone figure when recovering calculating after deleting unit corresponding to sliding mass.
(being side slope plastic zone figure behind second time landslide).
Figure 13 is side slope plastic zone figure before third time landslide.
Figure 14 is the slope sliding face location drawing of prediction in the simulation of landslide.
Embodiment:
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described.
With mountain iron ore at the moment for such as shown in Fig. 1-14.
(1) geology and mining background
As shown in Figure 4, mountain iron ore is located in numerous mountains scenic spot, level in Anshan city, liaoning province northeast 5km at the moment, mountain iron ore is established in nineteen sixty at the moment, outdoor mode is adopted to exploit, in September, 2012, strip mining transformation terminated, the long 1410m of outdoor pit east-west direction of formation, the wide 570m ~ 710m of North and South direction, closed level absolute altitude is 93m, final open-air pit elevation of bottom-183m; Side side slope slope angle in south is 35 ° ~ 38 °, and side side slope toe in north is 32 ° ~ 35 °, and iron ore mineral ore is positioned in the middle part of outdoor pit, is made up of, moves towards west, the Near East Fe1, Fe2 and Fe3 three ore bodies, tendency east northeast or Nan Xi, 70 ° ~ 88 °, inclination angle, and local is upright.
Work the ore body starting to exploit east, west end side in May, 2012, its Chinese and Western end side limit of mining is to the west of XIV exploratory line and the ore body of absolute altitude between 21m ~-183m, and the east side limit of mining is to the east of VII-50 exploratory line and the ore body of absolute altitude between-47m ~-183m; After completing the exploitation of thing end side, by recovery of subterranean ore body, underground mining scope is between XVI ~ IX+100 exploratory line and the ore body of absolute altitude in-183m ~-500m, thing end side and underground mining all adopt sublevel caving method without sill pillar, carry out from top to bottom according to horizontal slice mode, lift height is 18m.
(2) open air trestle exploitation pit Prediction of Slope Deformation Destruction
As depicted in figs. 1 and 2, below for I-I section, use the present invention, prediction open air trestle exploit the pit slope deformation destruction rule of bringing out.Adopt numerical simulation analysis software FLAC 3Dby setting up the numerical analysis model of side slope, recycle simulation process " separate zone production-numerical evaluation-landslide ", simulation pit side slope in recovery process continues the process on " stable-unstability-landslide-stablize again " occurred, and then draw slope deformation destruction rule in underground mining process, its step is as follows:
First, the numerical analysis model of side slope is set up:
1. on calculating section, arrange the known boundary lines such as tomography, separatrix, stratum, separate zone production boundary line in advance, and ensure that these boundary lines are the border of grid cell when subdivision;
2. with above-mentioned boundary line for constraint, calculating section is split into triangle gridding, and the length of side of the unit in region that requirement may be come down is 3m-5m, when simulating landslide, cell configuration is approximately equilateral triangle and the triangle gridding that the unit length of side is 3m-5m can reduce the grid cell crossing with slipping plane, makes slipping plane relative smooth;
3. along the normal direction calculating section, triangulation network translation 20m is become prismatic mesh.
4. according to the separate zone production boundary line pre-set, all unit to be exploited in each mined bed are weaved into one group.
Select the I-I section of pit side slope as calculating section; Then, calculating section is split into triangle gridding; Each plane grid unit is drawn into tri-prism element by the normal direction again along section; Utilize FLAC 3Dcarry out numerical simulation calculation, analysis of slope stability, as shown in Figure 3;
I-I section mined bed is divided into 9 layers by the present invention, exploits the ore body from-158m to-320m within the scope of elevation, and every layer thickness is 18m; Simulation separate zone production, namely utilizes FLAC 3Din NULL order, delete the grid cell corresponding to n-th layer ore body, realize simulation mining n-th layer; In whole recovery process, there are 3 slope failures altogether at Nan Po, and at north slope, 2 slope failures only occur;
When excavation the 1st layer to the 3rd layer, when namely excavating the mineral ore in elevation-158m to-212m, in recovery process, along with the increasing of mining depth, side slope plastic zone scope also increases gradually, but there is not through plastic zone, namely Fig. 5 has exploited side slope plastic zone after ground floor mineral ore after showing first time exploitation, namely Fig. 6 has exploited side slope plastic zone after second layer mineral ore after showing second time exploitation, namely Fig. 7 has exploited side slope plastic zone after third layer mineral ore after showing third time exploitation, as can be seen from the figure, now side slope is in steady state (SS).
In this digging process, maximum horizontal and the perpendicular displacement on Nan Bangpo top are respectively 2.44m and-0.58m, and maximum horizontal and the perpendicular displacement on top, north side slope are respectively-0.48m and-0.21m.
When excavation the 4th layer, when namely exploitation is to-230m, calculating does not restrain, and through plastic zone appears in side slope, and now side slope is no longer stable, occurs first time sliding mass at Nan Po and north slope simultaneously, this time comes down as the first time of side slope destroys.Fig. 8 shows the side slope plastic zone figure before simulation first time landslide.
In this simulation process, perform following 3 steps:
(1) calculate the displacement of each mesh node, and draw displacement isogram;
(2) select a displacement isoline closest to border, plastic zone as slope sliding face, and using the region between slipping plane and side slope free face as sliding mass;
(3) utilize NULL order to be deleted by the grid cell corresponding to first time sliding mass, realize landslide simulation;
Now simulate landslide by deleting the grid cell corresponding with sliding mass; Behind simulation landslide, no longer there is through plastic zone in side slope, as shown in Figure 9, this shows that now side slope is stablized once more;
Now continue excavation simulation the 5th layer, after having excavated the 5th layer, calculate convergence, there is not through plastic zone in side slope, side slope is still stablized, and continues excavation simulation the 6th layer;
During as first time landslide occurs, situation is similar, when exploit the 6th layer, when namely exploitation is to-266m, simultaneously occurs through plastic zone at Nan Po and north slope, as shown in Figure 10, now to come down and no longer stable, there occurs second time and come down.Figure 10 also show in simulation second time process of landslides side slope plastic zone figure when suspending calculating when numerical simulation calculation does not restrain.
In this simulation process, again perform following 3 steps:
(1) calculate the displacement of each mesh node, and draw displacement isogram, as shown in figure 11;
(2) select a displacement isoline closest to border, plastic zone as slope sliding face, and using the region between slipping plane and side slope free face as sliding mass;
(3) utilize NULL order to be deleted by the grid cell corresponding to second time slide mass, realize landslide simulation, as shown in figure 12.
Now simulate landslide by deleting the grid cell corresponding with sliding mass; Figure 12 is side slope plastic zone figure when recovering calculating after deleting unit corresponding to sliding mass in the simulation process of landslide, and now through plastic zone no longer appears in side slope, and this shows that now side slope is stablized again;
Now continue excavation simulation the 7th layer, after having excavated the 7th layer, calculate convergence, there is not through plastic zone in side slope, side slope is still stablized,
Continue excavation simulation the 8th layer, after having excavated the 8th layer, calculate convergence, there is not through plastic zone in side slope, side slope is still stablized.Continue excavation simulation the 9th layer;
Being, when namely exploitation is to-320m, only occurred through plastic zone at Nan Po when having exploited the 9th layer, as shown in figure 13, now only there occurs third time landslide at Nan Po, and north slope still keeping stable,
In this simulation process, again perform following 3 steps:
(1) calculate the displacement of each mesh node, and draw displacement isogram;
(2) select a displacement isoline closest to border, plastic zone as slope sliding face, and using the region between slipping plane and side slope free face as sliding mass;
(3) utilize NULL order to be deleted by the grid cell corresponding to third time slide mass, realize landslide simulation;
Now or by deleting the grid cell corresponding with sliding mass simulate landslide; Behind simulation landslide, no longer there is through plastic zone in side slope, this shows that now side slope is stablized once more.So far, the process of simulation mining 9 layers of mineral ore terminates.
Figure 14 gives in whole digging process, namely exploits-320m process from-158m, the slope sliding face location drawing of all predictions, along with the increase of cutting depth, to no longer stable, there is landslide by steady state (SS) afterwards in side slope, when behind landslide, side slope is stablized again; Continue excavation to certain depth, side slope is no longer stable again, occurs again landslide, altogether occurs coming down for 3 times at Nan Po, occur 2 times at north slope.
Adopt the present invention, by setting up the numerical analysis model of side slope, recycle simulation process " separate zone production-numerical evaluation-landslide ", simulation pit side slope in recovery process continues the process on " stable-unstability-landslide-stablize again " occurred, and then draws slope deformation destruction rule in underground mining process.
The present invention is according to pit slope failure prediction achievement, judge that contiguous buildings or structures and facility are by mining effect, for the determination of resettlement scope and time to move provides foundation, and for reasonable Arrangement produce, office plans to build surface facility and provides reference with living etc.

Claims (2)

1. a pit Prediction of Slope Deformation Destruction method is brought out in open air trestle exploitation, it is characterized in that: adopt numerical simulation analysis software FLAC 3Dby setting up the numerical analysis model of side slope, recycle simulation process " separate zone production-numerical evaluation-landslide ", simulation pit side slope in recovery process continues the process on " stable-unstability-landslide-stablize again " occurred, and then draw slope deformation destruction rule in underground mining process, its step is as follows:
Select the I-I section of pit side slope as calculating section; Then, calculating section is split into triangle gridding; Each plane grid unit is drawn into tri-prism element by the normal direction again along section;
Current mined bed is n-th layer, n=1,2,3 ...,
1st step: simulation separate zone production, namely utilizes FLAC 3Din NULL order, delete the grid cell corresponding to n-th layer ore body, realize simulation mining n-th layer;
2nd step: utilize FLAC 3Dcarry out numerical simulation calculation, analysis of slope stability;
3rd step: if not restraining appears through plastic zone and calculate in side slope, then perform the 4th step and carry out (n+1)th layer of orebody mining, otherwise skip to the 1st step;
4th step: the displacement calculating each mesh node, and draw displacement isogram;
5th step: select one article of displacement isoline closest to border, plastic zone as slope sliding face, and using the region between slipping plane and side slope free face as sliding mass;
6th step: utilize NULL order to be deleted by the grid cell corresponding to slide mass, realizes landslide simulation;
7th step: restart stability of slope numerical simulation calculation;
8th step: if numerical simulation calculation convergence, then skip to the 1st step, otherwise skip to the 5th step.
2. pit Prediction of Slope Deformation Destruction method is brought out in open air trestle exploitation according to claim 1, and it is characterized in that the described numerical analysis model setting up side slope, concrete steps are as follows:
1. on calculating section, arrange tomography, separatrix, stratum, separate zone production boundary line in advance, when subdivision, these boundary lines are using the border as grid cell;
2. with above-mentioned boundary line for constraint, calculatings section is split into triangle gridding, and the length of side of the unit in region that requirement may be come down is 3m-5m, simulate come down time, cell configuration is equilateral triangle;
3. along calculate section normal direction by all triangles in the triangulation network all translation 20m become prismatic mesh;
4. according to the separate zone production boundary line pre-set, all unit to be exploited in each mined bed are weaved into one group.
CN201410752016.8A 2014-12-09 2014-12-09 Method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining Pending CN104504461A (en)

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CN105335607B (en) * 2015-10-12 2017-06-16 湖北工业大学 A kind of computational methods of progressive disruption of slope potential water use
CN105335607A (en) * 2015-10-12 2016-02-17 湖北工业大学 Slope progressive failure latent slide surface calculating method
CN105699627A (en) * 2016-03-25 2016-06-22 辽宁工程技术大学 Method for determining slope angle of side slope
CN105926569A (en) * 2016-04-28 2016-09-07 河北地质大学 Method for quantitatively evaluating site stability of old goaf in coalmine based on settlement monitoring data
CN106227930A (en) * 2016-07-18 2016-12-14 东北大学 A kind of method of model identification being imported Flac3D by Midas based on Matlab
CN106326528A (en) * 2016-08-09 2017-01-11 鞍钢集团矿业有限公司 Method for predicting distribution rule of ground surface fissures induced by underground mining of surface mine end slope
CN106339528A (en) * 2016-08-09 2017-01-18 鞍钢集团矿业有限公司 Method for forecasting range of surface movement induced by underground mining of open-pit iron mine end slope
CN106339528B (en) * 2016-08-09 2019-06-25 鞍钢集团矿业有限公司 A kind of outdoors iron ore end side underground mining induces surface movement horizon prediction method
CN106326528B (en) * 2016-08-09 2019-11-05 鞍钢集团矿业有限公司 A kind of opencut end side underground mining induces Distribution Law of Ground Crack prediction technique
CN107942380A (en) * 2017-10-23 2018-04-20 太原理工大学 A kind of numerical simulation method for considering caving zone goaf
CN108446498A (en) * 2018-03-21 2018-08-24 河海大学 A kind of alternate form gradually refines side slope block discrete element numerical model construction method
CN108446498B (en) * 2018-03-21 2021-09-14 河海大学 Construction method of replaceable stepwise-refined slope block discrete element numerical model
CN110017170A (en) * 2019-04-09 2019-07-16 中国华冶科工集团有限公司 The prevention and control method of underground ore extraction underground hazard

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