CN102777179B - Method for controlling mine power capacity source by using region power planning - Google Patents
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Abstract
The invention relates to a method for controlling a mine power capacity source by using region power planning. The optimal combination of mine design, actual mining and natural environment is achieved, and the problem of passive protection of current mine power is solved. By the aid of the method, results of the region power planning are used, an application method of the region power planning on mines is established, engineering technical schemes are obtained through combination of the region power planning, computer simulation and contrastive analysis are conducted, a best solution in which the ratio of power disasters is the lowest is chosen, the protection is conducted for hazard areas, the application condition of the region power planning is improved, the combination of the region power planning and mineral engineering is achieved, and active protection of mine power disasters is achieved.
Description
Technical field
The present invention relates to field of coal mining, relate in particular in having the mine of dynamic phenomenon, application region power planning is controlled the method for mine motive force energy source.
background technology
Coal industry belongs to traditional high risk industries, and various disaster accidents happen occasionally.In recent years, comprise that the mine motive force phenomenon of coal and Gas Outburst, bump and ore deposit shake becomes the principal element in threat colliery.According to statistics, in 724 place's State owned coal mines of China, highly gassy mine reaches 152 places, accounts for 21% of sum; Mine 154 places of coal and Gas Outburst, account for 21.3% of sum, and reach global 1/3.In addition, in China's 910 place's large coal mines, there are 47 places, colliery of bump danger, account for 5.16% of sum.By the end of 2003 there is ore deposit shake in existing 102 collieries, place.
The average mining depth increasing velocity of the current mine of China is 8-12m/, some mines of east have reached the deepening speed of 10-25m/ especially, this present situation has determined a considerable amount of mines of China or has been about to enter deep mining category, and 1000 meters of coal resources reserves of verifying below of buried depth account for 53% of gross reserves.Compare with shallow mining, deep rock mass structure and ambient stress are more complicated, show as that the disaster that dynamic phenomenons such as " coal and Gas Outburst, bump and ore deposit shakes " produces is aggravated in intensity, raise in frequency, will restrict safe, the efficient and economic sustainable development of China coal industry.
Therefore,, in order to guarantee the further sustainable development of national economy, the restriction safety of coal mines that deep mining brings, dynamic phenomenon efficient and intensive exploitation need to be solved as soon as possible.This just requires to disclose the mechanism that dynamic disaster occurs, and dynamic phenomenon generation area is carried out to the danger releasing measures of prediction and application rationalization.
Researcher is devoted to explore dynamic phenomenon genesis mechanism for many years, Burst Tendency index is determined and the forecast and control work of dynamic phenomenon, propose multiple theoretical model, comprised rigidity theory, strength theory, energy theory, impact tendency theory and anamorphotic system Unstability Theory etc.
Summarize above-mentioned achievement in research, think that one of main general character influence factor that dynamic phenomenon occurs is for structure and the stress that produces thereof, and for the generation of dynamic phenomenon, the emphasis of at present research work all concentrates in the condition of coal petrography as material bodies unstability, and not when improving dynamic phenomenon and occur the source of energy carry out the research of Initiative defence.Therefore, determine the energy source (structure and stress distribution) of mine motive force phenomenon and propose prophylactico-therapeutic measures targetedly and have great importance for realizing Initiative defence.The source problem that comes for energy, Russia и. м. pendant figure Hough professor and и. м. Ba Tujinna professor has set up regional dynamic planing method during 1978-1979, think and affect the heterogeneity that the factor of mine motive force phenomenon is regional stress field and spatial distribution thereof, mine motive force phenomenon mostly occurs in the region of high stress and stress gradient district, the inhomogeneities that the when and where can partial interpretation mine motive force phenomenon occurring distributes, is subject to impact and the control of geological structure and geostatic stress.
The application of comprehensive region power planning and the research of current driving force phenomenon, think that regional dynamic planing method is for the possibility that provides of dynamic phenomenon is provided from source, but current application does not but realize this point, and still ignored the important function that engineering factor occurs dynamic phenomenon.
summary of the invention
In view of this, the object of the invention is to, propose a kind of application region power planning and controlled the method for mine motive force energy source, use the output control mine motive force source of regional dynamic planning, the mine of guidance in different phase adopts reasonable manner to produce, thereby realizes the Initiative defence of mine motive force disaster.
For achieving the above object, the present invention is by the following technical solutions:
Application region power planning is controlled a method for mine motive force energy source, wherein, said method comprising the steps of:
A, according to geological exploration data, use existing method to determine the engineering scheme of exploitation;
B, employing regional dynamic planing method are carried out fault block identification and are divided with fracture;
C, the fault block marking off according to regional dynamic and fracture improve the definite engineering scheme of step a, and then obtain a plurality of improved engineering schemes;
D, mine is carried out to geostress survey;
The geostatic stress that e, the improved engineering scheme obtaining according to step c and steps d obtain, adopts Computer Numerical Simulation software FLAC
3Dstress distribution to engineering background is calculated, and obtains corresponding stress distribution situation and the distribution of a plurality of improved engineering schemes difference;
F, the stress distribution that step e is obtained are divided, and by contrasting the stress distribution value of each improved engineering scheme and the size of distribution, determine optimal case;
G, the optimal case obtaining according to step f, mark off corresponding hazardous area and the threat district of optimal case that step f obtains, and prevent and treat for hazardous area and threat district.
Further, in step c, when mine is in design or first stage of construction, the improvement of existing engineering scheme is comprised to the improvement of developing mode and the improvement of coal-mining method;
When the intermediary and later stages of mine in building, the improvement of existing engineering scheme is only comprised to the improvement of coal-mining method.
Further, in step c, a plurality of improved engineering scheme obtaining is 3-6.Further, in step f, contrast the size of each scheme stress distribution value and distribution, when the difference of maximum stress Distribution Value is more than or equal to 5%, should choose the relatively minimum scheme of maximum stress Distribution Value as optimal case; If the difference of maximum stress Distribution Value is less than 5%, should further compare the distribution of maximum stress Distribution Value, choose the relatively minimum scheme of distribution as optimal case.
Further, in step g, by hazardous area with while threatening Division out, region internal stress Distribution Value distribution from high to low reach total size 20% time, using this distribution of 20% as hazardous area with threaten district.
Further, in step g, when the mine in application or adjacent mine overbump has occurred are pressed or dynamic phenomenon, so according to the place of this bump or dynamic phenomenon generation, from the analog result of software, find out stress distribution value corresponding to this place, and this is worth as the threshold of bump or dynamic phenomenon generation, and then marks off hazardous area and threaten district.
Further, the improvement of described developing mode comprises: Mining Protective Seam: for impacting mine, if there is Protective Coal Seam, Mining Protective Seam, for the mine that is not impingement, or does not adjust without the mine of Protective Coal Seam in advance; Direction of extraction: in this seam mining, the direction according to fracture, adopts the direction of extraction parallel with rift direction, and when there is the fracture intersecting, direction of extraction should be parallel with the main faults in Cross faults; Limit of mining: in this seam mining, in fault influence zone, stay the barrier pillar of establishing certain width not adopt; Mining sequence: according to the fracture marking off, in the influence basin of fracture, should adopt unidirectional exploitation.
Further, the improvement of described coal-mining method comprises the improvement of tunnel layout and the improvement of process for stoping, and the improvement that described tunnel is arranged comprises: roadway shape, according to the fracture marking off, in the influence basin of fracture, is arch by tunnel top design; Tunnel size, can continue to use the tunnel size design of the definite engineering scheme of step a, does not adjust; Drift support type, according to the fracture marking off, in the influence basin of fracture, takes flexible support; Coal Pillar Design, while being provided with coal column in the definite engineering scheme of step a, according to the fracture marking off, in the influence basin of fracture, is arranged in coal column inside by fracture, usings the reserved coal pillar rupturing as adjacent two work plane boundarys;
The improvement of described process for stoping comprises: fltting speed, for the work plane of Sub-Level Caving, large mining height and separate zone production first layer, according to the fracture marking off, in the influence basin of fracture, on the basis of former face propulsion speed, reduce fltting speed, for not adjusting of other situation; Back production support pattern, according to the fracture marking off, in the influence basin of fracture, preferably adopts the support apparatus with good retractility, such as hydraulic support; Roof control, according to the fracture marking off, in the influence basin of fracture, adopts tool post method or filling method supports the region of fracture.
As shown from the above technical solution, the present invention uses the result of regional dynamic planning, set up the application process of regional dynamic planning in mine, calmodulin binding domain CaM power planning proposes engineering scheme, and carry out computer simulation stress distribution, select the preferred plan of dynamic disaster occurrence probability minimum, and prevent and treat for deathtrap, thereby improved the application present situation of regional dynamic planning, by to thinking the improvement of technical factor, control mine motive force energy source, realized the combination of regional dynamic planning with mining engineering, the mine of guidance in different phase adopts reasonable manner to produce, and mine motive force disaster is carried out to Initiative defence.
accompanying drawing explanation
Fig. 1 is the flow chart of a kind of specific embodiment of the present invention.
the specific embodiment
The practical application of the method for the invention in coal production of take is below example, and the present invention is described in detail.Yet one skilled in the art would recognize that the present invention is not therefore subject to any restriction.
As shown in Figure 1, a kind of application region power planning that the present invention proposes is controlled the method for mine motive force energy source, comprises the following steps:
The first step, according to geological exploration data, is used existing method to determine the engineering scheme of exploitation.
Mining need to be considered natural cause and engineering factor, and wherein natural cause comprises fracture division, top board lithology, coal bed texture, seam inclination, coal seam thickness and mining depth; Engineering factor comprises developing mode and coal-mining method, and developing mode further relates to Mining Protective Seam, direction of extraction, limit of mining and mining sequence; Coal-mining method further relates to tunnel arranges and process for stoping, and wherein tunnel is arranged and comprised again roadway shape, tunnel size, drift support type and Coal Pillar Design, and process for stoping comprises fltting speed, back production support pattern and roof control simultaneously.
On the basis of geological exploration data, the engineering scheme that uses existing method to propose exploitation is well known to those skilled in the art.For example, follow following principle and propose developing mode: 1. carry out the technical policy of the relevant coal industry of country, guaranteeing to produce under reliable and safe precondition, reduce development engineering amount, especially reduce initial stage construction, save capital investment, accelerate mine construction; 2. rationally concentrate development plan, simplify production system, avoid producing and disperse, accomplish reasonable centralized production; 3. reasonable development resource, reduces Coal Loss; 4. the production system of Erecting and improving, makes main roadway remain on good practicality and maintenance state; 5. the technical level and the supply of equipment situation that adapt to current national, and for employing new technology, new technology, development mining mechanization, comprehensive mechanization, automation create conditions.
For example, Main Basis geologic(al) factor and Technological Economy selecting factors coal-mining method.Particularly, seam inclination and variation directly affect the selection of coal breakage method, Ways of coal haulage, stope support and the goaf processing etc. of coal-face, also directly affect determining of tunnel layout, transportation, ventilation and the various parameters of coal-mining method.Coal-mining method strengthens with seam inclination and is tending towards gradually difficult; Coal seam thickness affects the strata control around longwang face choice of technology, can equipment play one's part to the full and techno-economic effect, complete thick coal-mining method is once adopted in the common employing of girdle and medium-thickness seam, high seam and super high seam can adopt separate zone production, also can adopt large mining height or coal caving mining method; The stability of the soft or hard degree of coal seam and enclosing lithologies reflection coal seam feature and architectural feature, country rock etc., directly have influence on the selection of coal-cutting machinery, coal winning technology and goaf processing method.Coal seam and rock property also directly affect that tunnel is arranged and maintaining method, also affect determining of various parameters in exploiting field, panel or zone; For coal geology, construct and can adopt piece section size, when mode of occurence is stable, the exploitation larger coal seam of piece section is conducive to comprehensive adopting; Mode of occurence is unstable, and seam construction is more complicated should be adopted with general; When strike fault is many in exploitation piece section, should adopt strike long wall method; Seam inclination is little, and inclined fault is when many, should adopt inclined longwell mining method; For the spontaneous combustion tendency of the property of water-bearing, gas emission and the coal in coal seam, when coal seam and country rock water content are when large, need to be before mining drainage in advance, or in coal mining process, arrange draining and draining system.And coal seam when large, be arranged the tunnel of pre-gas pumping containing gas amount, meanwhile, coal-face ventilates and should take measures.The spontaneous combustion tendency in coal seam and ignition phase directly affect that tunnel is arranged, roadway maintenance method and coal-face direction of propulsion, and whether determine to need to take to prevent fires grouting measure or select the method for collecting coal by the means of filling.In addition, also has economic and technological factor.
More than be this area common technique, just no longer describe in detail here.
Second step, adopts regional dynamic planing method to carry out fault block identification to production zone rock body quality of mine and divides with fracture.For example, according to regional dynamic planing method in public publication document < < Geo-dynamic Division > > (ISBN978-1-5020-3540-2), rock body quality of mine being carried out to fault block identification divides with fracture, the fault block of rock body quality of mine can utilize morphostructural analysis to find out, the fault block of take is divided as basis along the intensity that moves both vertically that is in the fault zone system of different depth, different times.
The 3rd step, the fault block marking off according to regional dynamic and fracture improve the definite engineering scheme of the first step, obtain a plurality of improved engineering schemes, such as 3-6.
Yet in existing mining activity, the fracture going out according to geological prospecting, is generally used for the division of border, field with "nine squares" or section boundary, and for affecting the small-sized fracture of work plane and the growing state of fracture cannot be grasped in advance.And application region power planning can be found out potential fault structure, this has different character from the fracture obtaining in geological prospecting, has the feature of growth, can be described as the fracture of living, and belongs to the derivative of large fracture structure.
Because natural cause is objective reality, can find out by geological prospecting and regional dynamic planing method, belong to constant; And engineering factor can be improved by design in theory, in actual production, need to take in conjunction with the residing concrete stage of mine: when mine (is development system in design or first stage of construction, comprise pit shaft, shaft station, main main haulage roadway and the large lane of main return air, not yet complete), developing mode is adjustable, whole engineering factor (developing mode and coal-mining method) is variable factor, therefore to the improvement of engineering scheme, should comprise the improvement of developing mode and the improvement of coal-mining method; When the intermediary and later stages of mine in building, (system of opening up completes, for example arranging exploiting field or preparatory working), whole developing mode forms, in the time of cannot adjusting, developing mode is constant, now, the adjustment of coal-mining method is comparatively easy, therefore using coal-mining method all the time as variable factor,, to forming the mine of developing system, the improvement of engineering scheme is only comprised to the improvement of coal-mining method.
Therefore, in order to use the result of regional dynamic planning to instruct mine in different phase to adopt reasonable manner to produce, control mine motive force energy source, thereby realize the Initiative defence of mine motive force disaster, also need calmodulin binding domain CaM power planning achievement further to be improved engineering scheme.For convenience, the fracture of hereinafter mentioning all refers to the fracture that regional dynamic marks off.
Particularly, when improving developing mode, take into full account the impact of the fracture that regional dynamic marks off, make main roadway remain on good practicality and maintenance state.Wherein, the improvement of developing mode comprises: (1) Mining Protective Seam: for impacting mine, if there is Protective Coal Seam, Mining Protective Seam, for the mine that is not impingement, or can not improve without the mine of Protective Coal Seam in advance; (2) direction of extraction: in this seam mining, according to the direction of fracture, adopt the direction of extraction parallel with rift direction, when there is the fracture intersecting, direction of extraction should be parallel with the main faults (being the fracture of influence basin maximum in these fractures) in Cross faults, to avoid in driving or recovery process, mining induced stress and breaking stress produce stack; (3) limit of mining: in this seam mining, should be according to the fracture marking off, in the influence basin of fracture, stay the barrier pillar of establishing certain width not adopt, avoid causing the significantly rising of work plane mine pressure, and generation bump, wherein, according to fracture, show that fault influence zone is this area routine techniques, for example, those skilled in the art can draw fault influence zone according to computer simulation or laboratory simulation, and concrete simulation process is well known to those skilled in the art, and just no longer describe in detail herein; (4) mining sequence: according to the fracture marking off, in the influence basin of fracture, should adopt unidirectional exploitation, to avoid the situation that in double-vane exploiting field, appearance is exploited in opposite directions.All things considered, in this seam mining, definite direction of extraction, limit of mining and mining sequence, should be parallel with the tectonic stress breaking to form, and avoids occurring superposition phenomenon.
Equally, when improving coal-mining method, should take into full account the feature that regional dynamic marks off fracture, azimuth such as fault growth, mainly along the trend in coal seam, be still inclined to development, avoid or reduce engineering factor for the facilitation of the fault growth of living, thereby avoiding causing the motion of overlying rock that huge power resources are provided because of fault activities or growth.
According to the feature of regional dynamic planning fracture, analyze, determine that in mining area, fracture is mainly derived from or derived from along coal seam tendency along bearing, thereby determine along bearing and be still inclined to and arrange tunnel, for example, if fracture has the tendency development characteristic along coal seam, for fear of or reduce work plane and break to form stress stack with division, can determine adopt inclined longwell mining method, tool post formula, mining height is once adopted full the coal-mining methods such as thick, incline cut and fill stoping inclination longwell is descendingly caving, the up filling of incline cut and fill stoping longwell, Sub-Level Caving longwell greatly; If fracture has the development characteristic along bearing, can adopt strike long wall method, tool post formula, large mining height once to adopt thick, incline cut and fill stoping entirely and move towards the coal-mining methods such as longwell is descendingly caving, the up filling of incline cut and fill stoping longwell, Sub-Level Caving, horizontal fragmentation Sub-Level Caving.
The improvement of coal-mining method comprises the improvement of tunnel layout and the improvement of process for stoping.Particularly, the improvement that tunnel is arranged comprises: (1) roadway shape: according to the fracture marking off, in the influence basin of fracture, by tunnel top design, be preferably arch; (2) tunnel size: the tunnel size design that can continue to use the definite engineering scheme of the first step; (3) drift support type: according to the fracture marking off, in the influence basin of fracture, preferably take flexible support, such as the supporting of anchor rete cord; (4) Coal Pillar Design: while being provided with coal column in the definite engineering scheme of the first step, according to the fracture marking off, in the influence basin of fracture, preferably fracture is arranged in to coal column inside, usings fracture as the Coal Pillar Design of adjacent two work plane boundarys.So both can improve the rate of extraction, can reduce the impact of fracture on actual mining by rational pillar size again.
Particularly, the improvement of process for stoping comprises: (1) fltting speed: for the work plane of Sub-Level Caving, large mining height and separate zone production first layer, according to the fracture marking off, in the influence basin of fracture, on the basis of Ying Yuan face propulsion speed, reduce fltting speed, as be reduced to former face propulsion speed 50% or following, other can not improve; (2) back production support pattern: according to the fracture marking off, in the influence basin of fracture, preferably adopt the support apparatus with good retractility, such as hydraulic support; (3) roof control: according to the fracture marking off, in the influence basin of fracture, can adopt tool post method or filling method to support the region of fracture, be mainly used in avoiding the development of overlying rock fracture to cause top board unstability and produce huge power resources.
Like this, by the developing improvement of mode and the improvement of coal-mining method, can on the basis of the definite engineering scheme of the first step, obtain a plurality of improved engineering schemes.
Preferably, according to the 3rd step, obtaining after a plurality of described improved engineering schemes, can also be by the feasibility of improved engineering scheme described in indoor analog simulation experimental verification, for example, for face in steep thick coal seam, adopt inclination longwell still to move towards longwell, adopt separate zone production or full-seam mining, the reasonability of Coal Pillar Design and the difference of top board management texts, tentatively to remove infeasible scheme.
The 4th step, carries out geostress survey to mine, and geostress survey is that the geostatic stress state of measuring point is directly observed, and the data of measurement will provide basis for further experiment.The method existing comprises multiple, as resultant stress solution division, hydraulic fracturing etc.Wherein stress relief method is the method generally adopting both at home and abroad, should carry out in the place of the definite reflecting regional rock mass stress of energy.Resultant stress solution division: make measuring point rock mass depart from the method for geostatic stress effect completely, the method that conventionally adopts cover to bore realizes the complete stress relieving of trepanning rock core, therefore also claims trepanning stress relief method.In actual measurement, require to guarantee that measuring point is positioned at the initial stress area that is not subject to rock excavation disturbance; Guarantee that the aperture central part of test is in plane strain state.
The 5th step, the improved engineering scheme that the 3rd step is obtained and the 4th step obtain geostatic stress as primary condition, adopt Computer Numerical Simulation software FLAC
3Dstress distribution to engineering background is calculated, and obtains stress distribution situation corresponding to different engineering schemes difference.FLAC
3D(Fast Lagrangian Analysis of Continua in 3Dimensions) is the three-dimensional explicit finite difference program by American I tasca Consulting Group Inc exploitation.FLAC
3Dresearch object is divided into the multiaspect cell cube grid that can be out of shape and move, adopts Lagrangian difference method to solve, its basic principle is similar to distinct element method to algorithm, uses the modal displacement condition of continuity, can carry out analysis on Large Deformation to continuous media.This software can be for the research of the aspects such as stability of slope, pit mining design, tunnelling design and supporting, earthquake engineering and rock burst research and digging large deformation.Adopt FLAC
3Dwhile carrying out numerical simulation, will be according to the target of determine analyzing, set up model, collect the detailed data of Solve problems, the computing of carrying out model, analytic operation result, because this software is the conventional simulation tool in this area, so its physical simulation process just no longer describes in detail.
The 6th step, the stress distribution situation obtaining according to the 5th step, by each scheme hazardous area relatively with threaten the stress distribution value in district and the size of distribution, determines optimal case.When if stress distribution value and distribution meet when different, at this moment first compare the size of stress distribution value, according to mining, if the difference of maximum stress Distribution Value is more than or equal to 5%, should choose the relatively minimum scheme of maximum stress Distribution Value as optimal case; If the difference of maximum stress Distribution Value is less than 5%, should further compare the distribution of maximum stress Distribution Value, choose scheme that distribution is relatively little as optimal case, thereby control mine motive force energy source.
The 7th step, the optimal case obtaining for the 6th step, marks off the hazardous area that optimal case is corresponding and threatens district, and prevents and treats for hazardous area and threat district.According to existing research conclusion, dynamic phenomenon generally occurs in hazardous area, threaten He Wu hazardous area, the district (region of high stress, stress gradient district and low stress area, i.e. " 3rd districts ") in hazardous area and threaten district (region of high stress and stress gradient district), according to this area experience achievement, region internal stress Distribution Value distribution from high to low reach total size 20% time, using this distribution of 20% as hazardous area with threaten district, and carry out mine motive force diaster prevention and control for hazardous area and threat district, concrete means of prevention can be the conventional means of prevention in this area, thereby make control more targeted, and can before occurring, disaster prevent and treat.
Certainly, if there is overbump and pressed or dynamic phenomenon in mine or adjacent mine in application, so according to the place of this bump or dynamic phenomenon generation, can from the analog result of software, find out stress distribution value corresponding to this place, and this is worth as the threshold of bump or dynamic phenomenon generation, thereby mark off more scientifically and rationally danger and threat district.
Claims (8)
1. application region power planning is controlled a method for mine motive force energy source, it is characterized in that, said method comprising the steps of:
A, according to geological exploration data, use existing method to determine the engineering scheme of exploitation;
B, employing regional dynamic planing method are carried out fault block identification and are divided with fracture;
C, the fault block marking off according to regional dynamic and fracture improve the definite engineering scheme of step a, and then obtain a plurality of improved engineering schemes;
D, mine is carried out to geostress survey;
The geostatic stress that e, the improved engineering scheme obtaining according to step c and steps d obtain, adopts Computer Numerical Simulation software FLAC
3Dstress distribution to engineering background is calculated, and obtains corresponding stress distribution situation and the distribution of a plurality of improved engineering schemes difference;
F, the stress distribution that step e is obtained are divided, and by contrasting the stress distribution value of each improved engineering scheme and the size of distribution, determine optimal case;
G, the optimal case obtaining according to step f, mark off corresponding hazardous area and the threat district of optimal case that step f obtains, and prevent and treat for hazardous area and threat district.
2. the method for claim 1, is characterized in that, in step c, when mine is in design or first stage of construction, the improvement of existing engineering scheme is comprised to the improvement of developing mode and the improvement of coal-mining method;
When the intermediary and later stages of mine in building, the improvement of existing engineering scheme is only comprised to the improvement of coal-mining method.
3. method as claimed in claim 2, is characterized in that, in step c, a plurality of improved engineering scheme obtaining is 3-6.
4. the method for claim 1, it is characterized in that, in step f, contrast the size of each scheme stress distribution value and distribution, when the difference of maximum stress Distribution Value is more than or equal to 5%, should choose the relatively minimum scheme of maximum stress Distribution Value as optimal case; If the difference of maximum stress Distribution Value is less than 5%, should further compare the distribution of maximum stress Distribution Value, choose the relatively minimum scheme of distribution as optimal case.
5. the method for claim 1, it is characterized in that, in step g, by hazardous area with while threatening Division out, region internal stress Distribution Value distribution from high to low reach total size 20% time, using this distribution of 20% as hazardous area with threaten district.
6. the method for claim 1, it is characterized in that, in step g, when the mine in application or adjacent mine overbump has occurred are pressed or dynamic phenomenon, so according to the place of this bump or dynamic phenomenon generation, from the analog result of software, find out stress distribution value corresponding to this place, and this is worth as the threshold of bump or dynamic phenomenon generation, and then mark off hazardous area and threaten district.
7. method as claimed in claim 2, is characterized in that, the improvement of described developing mode comprises: Mining Protective Seam: for impacting mine, if there is Protective Coal Seam, Mining Protective Seam, for the mine that is not impingement, or does not adjust without the mine of Protective Coal Seam in advance; Direction of extraction: in this seam mining, the direction according to fracture, adopts the direction of extraction parallel with rift direction, and when there is the fracture intersecting, direction of extraction is parallel with the main faults in Cross faults; Limit of mining: in this seam mining, in fault influence zone, stay the barrier pillar of establishing certain width not adopt; Mining sequence: according to the fracture marking off, in the influence basin of fracture, should adopt unidirectional exploitation.
8. method as claimed in claim 2, is characterized in that, the improvement of described coal-mining method comprises the improvement of tunnel layout and the improvement of process for stoping, the improvement that described tunnel is arranged comprises: roadway shape, according to the fracture marking off, in the influence basin of fracture, by tunnel top design, be arch; Tunnel size, continues to use the tunnel size design of the definite engineering scheme of step a, does not adjust; Drift support type, according to the fracture marking off, in the influence basin of fracture, takes flexible support; Coal Pillar Design, while being provided with coal column in the definite engineering scheme of step a, according to the fracture marking off, in the influence basin of fracture, is arranged in coal column inside by fracture;
The improvement of described process for stoping comprises: fltting speed, for the work plane of Sub-Level Caving, large mining height and separate zone production first layer, according to the fracture marking off, in the influence basin of fracture, on the basis of former face propulsion speed, reduce fltting speed, for other situation, do not adjust; Back production support pattern, according to the fracture marking off, in the influence basin of fracture, adopts the support apparatus with good retractility; Roof control, according to the fracture marking off, in the influence basin of fracture, adopts tool post method or filling method to support the region of fracture.
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| CN106761746A (en) * | 2016-11-29 | 2017-05-31 | 安徽理工大学 | A kind of method for determining island working face reserved coal pillar rational width |
| CN108590656B (en) * | 2018-04-02 | 2019-10-01 | 西安科技大学 | A kind of disaster-ridden member coupling hard-to-recovery reserve decoupling recovery method |
| CN113027529B (en) * | 2021-03-22 | 2022-03-01 | 中国矿业大学 | Stope impact risk assessment method based on numerical inversion |
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