CN103809215B - Method for obtaining response to soil body subsidence of thick alluvium mine area - Google Patents

Abstract

The invention provides a method for obtaining a response to soil body subsidence of a thick alluvium mine area. The method includes: obtaining an earth surface subsidence parameter of the thick alluvium mine area; obtaining an earth surface subsidence parameter of a thin alluvium mine area which has bed rock characteristics similar to characteristics of bed rock of the thick alluvium mine area, and using the earth surface subsidence parameter of the thin alluvium mine area as a reference parameter of the lower boundary of a soil body of the thick alluvium mine area; obtaining an interior subsidence characteristic parameter of the soil body of the thick alluvium mine area through calculation according to the earth surface subsidence parameter of the thick alluvium mine area and the reference parameter of the lower boundary of the soil body of the thick alluvium mine area so as to analyze the response to the soil body subsidence of the thick alluvium mine area. The method for obtaining the response to the soil body subsidence of the thick alluvium mine area is used to obtain the response to the subsidence of the interior of the soil body of the thick alluvium mine area so as to study a surface subsidence mechanism of the thick alluvium mine area.

Description

A kind of acquisition methods of Heavy work mining area soil body depression response

Technical field

The present invention relates to mining technology, more particularly, to a kind of acquisition side of Heavy work mining area soil body depression response Method.

Background technology

In the Coal Mining Area of China, mine geology is down followed successively by alluvium and basement rock from earth's surface, wherein, basement rock bag Include overlying rock, coal seam and floor strata.Mining area is divided into different species by the geologic feature according to mining area, with the thickness of alluvium As a example degree feature, the mining area generally alluvium thickness being less than 50m is referred to as thin alluvium mining area, and alluvium thickness is more than 100m Mining area be referred to as Heavy work mining area, by alluvium thickness be more than 300 meters mining area be referred to as inwash mining area.To coal seam During being exploited and exploitation terminate after, lacked the supporting role in coal seam, the alluvium above coal seam, overlying rock meeting Depression phenomenon, the stability of the Architectural Equipment to earth's surface for the depression phenomenon and security is occurred to have a certain impact, accordingly, it would be desirable to right The subsidence parameter in mining area is obtained, and to be analyzed to subsidence, and then takes suitable means to avoid depression Phenomenon causes serious impact to Architectural Equipment.

The acquisition methods of currently used subsidence parameter are primarily directed to thin alluvium mining area or no alluvium ore deposit Area setting, and for Heavy work mining area, because its alluvium is thicker, to thin alluvium mining area or no alluvium mining area institute Using parameter acquiring method can not be suitable for.At present, the acquisition side to Heavy work mining area inside soil body subsidence parameter Method mainly adopts the mode such as laboratory experiment and numerical simulation, and this mode is only capable of mining area superficial phenomenon is analyzed, for example, obtains Get subsidence coefficient to be analyzed with the scope to subsidence, and can not be to complicated ground in Heavy work mining area The variation characteristic of body is monitored.Therefore, obtain the characteristic parameter of Heavy work mining area inside soil body depression response, with to its ground Table depression response is analyzed becoming a great problem urgently to be resolved hurrily in this area.

Content of the invention

The present invention provides a kind of acquisition methods of Heavy work mining area soil body depression response, for Heavy work mining area soil The subsidence parameter in internal portion is obtained, and is analyzed with the soil body depression response to Heavy work mining area.

The embodiment of the present invention provides a kind of acquisition methods of Heavy work mining area soil body depression response, comprising:

Obtain the subsidence parameter in Heavy work mining area；

The basement rock in acquisition and described Heavy work mining area has the subsidence parameter in the thin alluvium mining area of similar features, Reference parameter as described Heavy work mining area soil body lower boundary；

The reference parameter of the subsidence parameter according to described Heavy work mining area and described soil body lower boundary is calculated The inside soil body subsidence parameter in described Heavy work mining area, is carried out with the soil body depression response to described Heavy work mining area Analysis.

The acquisition methods of Heavy work mining area as above soil body depression response, obtain and described Heavy work mining area Basement rock has the subsidence parameter in the thin alluvium mining area of similar features, as described Heavy work mining area soil body lower boundary Reference parameter, comprising:

Determine that the basement rock with described Heavy work mining area has the thin alluvium mining area of similar features；

Obtain the subsidence parameter in described thin alluvium mining area, as the ginseng of described Heavy work mining area soil body lower boundary Examine parameter.

The acquisition methods of Heavy work mining area as above soil body depression response, determine and described Heavy work mining area Basement rock has the thin alluvium mining area of similar features, comprising:

The boring column sample of collection Heavy work mining area basement rock is as standard sample；

The boring column sample gathering thin alluvium mining area to be identified basement rock is as sample to be identified；

Extract the lithologic character of described standard sample and sample to be identified respectively；

Lithologic character according to described standard sample and sample to be identified determines the basement rock tool with described Heavy work mining area There is the thin alluvium mining area of similar features.

The acquisition methods of Heavy work mining area as above soil body depression response, the lithology extracting described standard sample is special Levy, comprising:

Described standard sample is divided into n section rock stratum, along on from basement rock to the direction of alluvium, between every section of rock stratum away from From s_i=i(i=1,2 ..., n)；

It is calculated the rock of described standard sample according to the corresponding assessment of rock properties coefficient in each section of rock stratum according to equation below Property evaluation coefficient p_i, as the lithologic character of described standard sample:

$p_i=\frac{\underset{i=1}{\overset{n}{\mathrm{\σ}}}{m}_i{q}_i}{\underset{i=1}{\overset{n}{\mathrm{\σ}}}{m}_i},$

Wherein, m_iRepresent the normal thickness of i-th section of rock stratum in n section rock stratum,q_iRepresent i-th section in n section rock stratum Rock stratum corresponding assessment of rock properties coefficient.

The acquisition methods of Heavy work mining area as above soil body depression response, extract the lithology of described sample to be identified Feature, comprising:

Described sample to be identified is divided into n section rock stratum, along on from basement rock to the direction of alluvium, between every section of rock stratum Apart from s_j=j(j=1,2 ..., n)；

Described sample to be identified is calculated according to equation below according to the corresponding assessment of rock properties coefficient in each section of rock stratum Assessment of rock properties coefficient p_j, as the lithologic character of described sample to be identified:

$p_j=\frac{\underset{j=1}{\overset{n}{\mathrm{\σ}}}{m}_j{q}_j}{\underset{j=1}{\overset{n}{\mathrm{\σ}}}{m}_j},$

Wherein, m_jRepresent the normal thickness of n section rock stratum ZhongjDuan rock stratum,q_jRepresent jth in n section rock stratum Section rock stratum corresponding assessment of rock properties coefficient.

The acquisition methods of Heavy work mining area as above soil body depression response, according to described standard sample and to be identified The lithologic character of sample determines that the basement rock with described Heavy work mining area has the thin alluvium mining area of similar features, comprising:

Assessment of rock properties coefficient according to described standard sample and sample to be identified calculates described standard sample and mark to be identified This similarity；

Described similarity and standard value are compared, by mark to be identified minimum with the difference of standard value for described similarity This corresponding thin alluvium mining area has the thin alluvium mining area of similar features as the basement rock with described Heavy work mining area.

The acquisition methods of Heavy work mining area as above soil body depression response, according to described standard sample and to be identified The assessment of rock properties coefficient of sample calculates the similarity of described standard sample and sample to be identified, comprising:

Described standard sample is calculated according to the assessment of rock properties coefficient of described standard sample and sample to be identified and waits to know Degree of membership between other sample；

It is calculated the similarity of described standard sample and sample to be identified according to described degree of membership.

The acquisition methods of Heavy work mining area as above soil body depression response, according to described standard sample and to be identified The assessment of rock properties coefficient of sample is calculated the degree of membership between described standard sample and sample to be identified, including:

Described mark is calculated according to equation below according to the assessment of rock properties coefficient of described standard sample and sample to be identified I-th section between fiducial mark basis and sample to be identified (i=1,2 ..., n) degree of membership u of rock stratum_k:

$u_i=1.0-\frac{|p_i-p_j|}{p_i}.$

The acquisition methods of Heavy work mining area as above soil body depression response, are calculated institute according to described degree of membership State standard sample and the similarity of sample to be identified, comprising:

Calculate similarity c of described standard sample and m sample to be identified according to described degree of membership according to equation below_k(k =1,2 ..., m):

$c_k=\frac{\mathrm{\σ}{u}_i}{n}.$

Technical scheme provided in an embodiment of the present invention, the most similar by choosing a basement rock to Heavy work mining area Thin alluvium mining area, obtains the subsidence parameter in Heavy work mining area and thin alluvium mining area respectively, and by thin alluvium ore deposit The subsidence parameter in area, as the soil body downstream condition of Heavy work mining area alluvium, the earth's surface in Heavy work mining area is sunk Sunken parameter as the soil body upper boundary conditions of alluvium, according to alluviation layer soil body upper boundary conditions and downstream condition to thick alluviation The soil body depression response characteristic in layer mining area and subsidence particularity are calculated and are analyzed, and obtain Heavy work mining area surface and sink Sunken response characteristic parameters, and then analyze the Surface Subsidence Mechanism in Heavy work mining area, with to Heavy work mining area surface depression Particularity is comprehensively explained, solves a great problem of the prior art.

Brief description

Fig. 1 is the flow chart of the acquisition methods of Heavy work mining area provided in an embodiment of the present invention soil body depression response；

Fig. 2 is mining area distribution of strata schematic diagram；

Fig. 3 is the distribution schematic diagram of each rock stratum in overlying rock；

Fig. 4 is the structural representation of Heavy work surface subsidence.

Specific embodiment

Fig. 1 is the flow chart of the acquisition methods of Heavy work mining area provided in an embodiment of the present invention soil body depression response.This Embodiment provides a kind of acquisition methods of Heavy work mining area soil body depression response, can be to the depression of the Heavy work mining area soil body Response and subsidence particularity mechanism carry out system research, are carried out with the particularity to Heavy work mining area surface depression comprehensively Explanation, as shown in figure 1, the method may include that

Step 10, the subsidence parameter in acquisition Heavy work mining area.

The basement rock of step 20, acquisition and Heavy work mining area has the subsidence ginseng in the thin alluvium mining area of similar features Number, as the reference parameter of Heavy work mining area soil body lower boundary.

The reference parameter of step 30, the subsidence parameter according to Heavy work mining area and soil body lower boundary is calculated thickness The inside soil body subsidence parameter in alluvium mining area, is analyzed with the soil body depression response to Heavy work mining area.

Wherein, the subsidence parameter obtaining Heavy work mining area specifically the earth's surface in Heavy work mining area can set up observation Stand, the earth's surface in Heavy work mining area is measured, obtain subsidence parameter, specifically can be according to skill commonly used in the prior art Art scheme realizing, such as the earth's surface in the range of mining effect, set a series of observation stations connecting each other, in mining activity During, the space coordinates of each observation station of periodic measurement and the variable quantity of relative position, by dividing to the inverting of measured data Analysis obtains the subsidence parameter surveyed, as Heavy work soil body upper boundary conditions.

It is then determined that the more similar thin alluvium mining area of a basement rock feature to Heavy work mining area, in the present embodiment, Can determine that a thin alluvium mining area it is also possible to determine a no alluvium mining area, this thin alluvium mining area refers to alluvium Thickness be less than 50 meters of mining area, no alluvium mining area refers to the mining area not having alluvium.The present embodiment is only with thin alluvium As a example mining area, technical scheme is described in detail, the technical scheme that those skilled in the art can provide according to the present embodiment No alluvium mining area can be chosen realizing.Either the alluvium in Heavy work mining area or thin alluvium mining area is the soil body Structure.

After determining a more similar thin alluvium mining area of the basement rock feature to Heavy work mining area, obtain this thin The subsidence parameter in alluvium mining area, as (that is: the friendship of alluvium and basement rock of Heavy work mining area alluviation layer soil body lower boundary Interface) reference parameter.Specifically observation station can be set up in the earth's surface in thin alluvium mining area, the earth's surface in thin alluvium mining area is carried out Measurement, obtains subsidence parameter, specific implementation can be identical with the mode that the earth's surface in Heavy work sets up observation station, root According to the space coordinates of each observation station in thin alluvium mining area surface and the variable quantity of relative position, actual measurement ground is gone out by back analysis The subsidence parameter of table depression parameter, as thin alluvium mining area, in this, as the downstream condition of the Heavy work soil body.

Fig. 2 is mining area distribution of strata schematic diagram, as shown in Fig. 2 mining area stratum is divided into downwards alluvium soil from earth's surface Body and basement rock, wherein, basement rock is divided into overlying rock, coal seam and floor strata.Due to thin alluvium mining area alluvium relatively very Thin, if its basement rock is similar with the basement rock feature in Heavy work mining area, the earth's surface variation characteristic in thin alluvium mining area and Hou Chong The variation characteristic of lamination mining area basement rock upper surface (i.e. alluvium lower surface) is similar, then can be by the earth's surface in thin alluvium mining area Depression parameter as the depression parameter (i.e. the downstream condition of alluviation layer soil body) of Heavy work mining area alluvium lower surface, and with Combine is analyzed the subsidence parameter (i.e. the upper boundary conditions of alluviation layer soil body) in Heavy work mining area, to obtain thick punching The inside soil body depression response characteristic in lamination mining area, to realize the soil body depression response in Heavy work mining area is analyzed.

The above-mentioned determination thin alluvium mining area more similar to the basement rock feature in Heavy work mining area, using by the way of have a lot In, the present embodiment offer is a kind of can be in the way of realizing:

First, the boring column sample of collection Heavy work mining area basement rock, as standard sample, gathers thin alluviation to be identified The boring column sample of layer mining area basement rock as sample to be identified, the then lithology of extraction standard sample and sample to be identified respectively Feature, the lithologic character according to standard sample and sample to be identified determines that the basement rock with Heavy work mining area has similar features Thin alluvium mining area.

The technical scheme that the present embodiment provides is the comparison to basement rock characteristic, wherein, the boring in collection Heavy work mining area The mode of column sample can be holed downwards in the earth's surface in Heavy work mining area, then removes the column sample collecting In alluvium, remaining be basement rock, as standard sample.

For the determination process in thin alluvium mining area, multiple thin alluvium mining areas can be chosen and carry out collection of specimens, respectively with The standard sample in Heavy work mining area is compared, determine one most like.Specifically can be in the earth's surface in each thin alluvium mining area Holed downwards, then removed the alluvium in the column sample collecting, remaining as basement rock, as mark to be identified This.

The lithologic character of extraction standard sample and sample to be identified respectively, specifically can adopt the following technical scheme that real Existing:

(1) standard sample can be divided into n section rock stratum, along from basement rock to alluvium by the lithologic character of extraction standard sample Direction on, with the upper surface in coal seam as initial point, the distance between every section of rock stratum s upwards_i=i(i=1,2 ..., n).Then basis The corresponding assessment of rock properties coefficient in each section of rock stratum is calculated the assessment of rock properties coefficient p of standard sample according to equation below_i, as The lithologic character of standard sample:

$p_i=\frac{\underset{i=1}{\overset{n}{\mathrm{\σ}}}{m}_i{q}_i}{\underset{i=1}{\overset{n}{\mathrm{\σ}}}{m}_i},$

Wherein, m_iRepresent the normal thickness of i-th section of rock stratum in n section rock stratum,q_iRepresent i-th section in n section rock stratum Rock stratum corresponding assessment of rock properties coefficient, can refer to table one and comes to q_iSet.For example when the 2nd section of rock stratum is batt matter schist When, then q₂Can be with value for 0.4.

Table one assessment of rock properties coefficient reference value

Rock title	Assessment of rock properties coefficient
		Hard limestone, hard sand, hard marble, not hard granite	0.0
Harder limestone, sandstone, marble	0.05
		Common sandstone, iron ore	0.1
Arenaceous shale, sheet sandstone	0.2
		Batt matter schist, not hard sandstone and limestone, soft conglomerate	0.4
Various shale (not hard), fine and close marl	0.6
		Soft shale, very soft rock limestone, anthracite, common marl	0.8
Broken shale, bituminous coal, clay (densification)	0.9
		Soft dauk, loess, soft gravel, loose sand	1.0

(2) extract sample to be identified lithologic character, sample to be identified can be divided into n section rock stratum, along from basement rock to On the direction of alluvium, with the upper surface in coal seam as initial point, the distance between every section of rock stratum s upwards_j=j(j=1,2 ..., n).Root It is calculated the assessment of rock properties coefficient p of sample to be identified according to the corresponding assessment of rock properties coefficient in each section of rock stratum according to equation below_j, Lithologic character as sample to be identified:

$p_j=\frac{\underset{j=1}{\overset{n}{\mathrm{\σ}}}{m}_j{q}_j}{\underset{j=1}{\overset{n}{\mathrm{\σ}}}{m}_j},$

Wherein, m_jRepresent the normal thickness of n section rock stratum ZhongjDuan rock stratum,q_jRepresent jth in n section rock stratum Section rock stratum corresponding assessment of rock properties coefficient is it is also possible to set with reference to table one.

Above-mentioned according to arithmetic series, segmentation is carried out to standard sample and sample to be identified, allow in overlying rock different The sinking effect of rock stratum is different, as shown in figure 3, Fig. 3 is the distribution schematic diagram of each rock stratum in overlying rock.Overlying rock is from up to Under can be divided into loose alluvium band, curved bel, slit band and caving zone successively, in the sample collecting, nearer apart from coal seam Rock stratum affected by exploitation bigger, in counterincision seamed belt, the impact of rock mass is bigger.

After extracting the lithologic character of standard sample and sample to be identified, according to standard sample and sample to be identified Lithologic character determines that the basement rock with Heavy work mining area has the thin alluvium mining area of similar features, specifically can be according to standard mark This assessment of rock properties coefficient p_iAssessment of rock properties coefficient p with sample to be identified_jCalculating standard sample and sample to be identified similar Degree.

The mode calculating similarity has many kinds, for example with following manner: according to the assessment of rock properties coefficient of standard sample p_iAssessment of rock properties coefficient p with sample to be identified_jIt is calculated the degree of membership between standard sample and sample to be identified, such as: according to Equation below be calculated i-th section between standard sample and sample to be identified (i=1,2 ..., n) degree of membership u of rock stratum_i:

$u_i=1.0-\frac{|p_i-p_j|}{p_i}.$

Wherein, i=j.Then according to degree of membership u_iIt is calculated the similarity between standard sample and each sample to be identified, Similarity c of standard sample and m sample to be identified specifically can be calculated according to equation below_k(k=1,2 ..., m):

$c_k=\frac{\mathrm{\σ}{u}_i}{n}.$

By similarity c_kIt is compared with standard value, this standard value can be 1.00.By similarity c_kWith 1.00 difference Little sample to be identified corresponding thin alluvium mining area be considered as with the basement rock in Heavy work mining area do close, as with Heavy work The basement rock in mining area has the thin alluvium mining area of similar features.

The technical scheme being provided according to the above, is determining the thin alluvium mining area closest to Heavy work mining area basement rock Afterwards, the earth's surface in thin alluvium mining area sets up observation station, obtains subsidence parameter.Then by the earth's surface in thin alluvium mining area Depression parameter is as the depression parameter of alluviation layer soil body lower boundary in Heavy work mining area, the subsidence with Heavy work mining area Parameter combines and is analyzed, to obtain the soil body depression response characteristic in Heavy work mining area.

Specifically can refer to Fig. 4, Fig. 4 is the structural representation of Heavy work subsidence, in Fig. 4 divides alluvium and basement rock Open, be only used for the technical scheme of the present embodiment is illustrated.In actual mining area, the lower surface of alluvium is the upper of basement rock Surface (namely interface of alluviation layer soil body and basement rock).Form goaf after coal seam is plucked out of, the support having lacked coal seam is made There is inbreak, absciss layer and bending with, overlying rock, be then gradually passed up to alluviation layer soil body so that under alluviation layer soil body Heavy.Alluviation layer soil body occurs sinking can lead to, and the soil body follows sinking, dehydration consolidation is sunk and soil body compaction subsiding three aspect Response.And the Heavy work soil body in the form of load, going down, should due to act on basement rock and goaf until goaf Power increases, and in the gob caving band being affected by alluvium load, fragmented rock body is more compacted, and the broken swollen property of rock reduces, crack Tend to closing along slabbing gap and absciss layer in band, the space cementing out is delivered to earth's surface, cause Rock And Soil synergy to sink to ringing Should, increase the deflection of earth's surface.

According to the depression parameter of alluvium upper and lower surface, mechanics can be used according to the physico-mechanical properties of the soil body Method be calculated the sinking situation of each soil layer.The inside soil body subsidence parameter in Heavy work mining area can be multiple ginsengs Number, specifically can refer in prior art and is analyzed adopted parameters to thin alluvium mining area or no alluvium mining area, Its specific analysis method can also refer to method commonly used in the prior art to realize.For example can adopt commonly used in the prior art Probability integration process (is equivalent to thin according to the surface subsidence value that the actual measurement depression parameter in thin alluvium mining area calculates Heavy work mining area Adopting of alluvium mining area becomes big deeply), the soil body obtaining Heavy work mining area follows sinking；Surveyed according to Heavy work mining area surface That sinks and calculated follows sinking, asks its difference to obtain corresponding alluviation layer soil body depression response curve.Then according to alluviation The layer depression parameter of lower surface and the soil body follow the difference between sinking parameter, obtain the soil body additional sinking parameter and corresponding Curve, can sink to dehydration consolidation according to this additional sinking parameter and curve, soil body compaction subsiding and ground are worked in coordination with and made It is analyzed with situation about sinking.

The technical scheme that the present embodiment provides, by the thin punching the most similar of one basement rock to Heavy work mining area of selection Lamination mining area, obtains the subsidence parameter in Heavy work mining area and thin alluvium mining area respectively, and by thin alluvium mining area Subsidence parameter, as the soil body downstream condition of Heavy work mining area alluvium, the subsidence in Heavy work mining area is joined Count the soil body upper boundary conditions as alluvium, according to alluviation layer soil body upper boundary conditions and downstream condition to Heavy work ore deposit The soil body depression response characteristic in area and subsidence particularity are calculated and are analyzed, and obtain Heavy work mining area inside soil body and sink Sunken response characteristic parameters, and then analyze the Surface Subsidence Mechanism in Heavy work mining area, with to Heavy work mining area surface depression Particularity is comprehensively explained, solves a great problem of the prior art.

Finally it is noted that various embodiments above, only in order to technical scheme to be described, is not intended to limit；To the greatest extent Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that: its according to So the technical scheme described in foregoing embodiments can be modified, or wherein some or all of technical characteristic is entered Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology The scope of scheme.

Claims (6)

1. a kind of acquisition methods of Heavy work mining area soil body depression response are it is characterised in that include:

Obtain the subsidence parameter in Heavy work mining area；

Obtain the subsidence parameter in the thin alluvium mining area to the basement rock in described Heavy work mining area with similar lithologic character, Reference parameter as described Heavy work mining area soil body lower boundary；

Described in the reference parameter of the subsidence parameter according to described Heavy work mining area and described soil body lower boundary is calculated The inside soil body subsidence parameter in Heavy work mining area, to carry out to the soil body depression in described Heavy work mining area response point Analysis；

Wherein, the basement rock in acquisition and described Heavy work mining area has the subsidence ginseng in the thin alluvium mining area of similar features Number, as the reference parameter of described Heavy work mining area soil body lower boundary, comprising:

Determine that the basement rock with described Heavy work mining area has the thin alluvium mining area of similar features；

Obtain the subsidence parameter in described thin alluvium mining area, as the reference ginseng of described Heavy work mining area soil body lower boundary Number；

Wherein it is determined that have the thin alluvium mining area of similar features with the basement rock in described Heavy work mining area, comprising:

The boring column sample of collection Heavy work mining area basement rock is as standard sample；

The boring column sample gathering thin alluvium mining area to be identified basement rock is as sample to be identified；

Extract the lithologic character of described standard sample and sample to be identified respectively；

Lithologic character according to described standard sample and sample to be identified determines that the basement rock with described Heavy work mining area has phase Thin alluvium mining area like feature；

Wherein, extract the lithologic character of described standard sample, comprising:

Described standard sample is divided into n section rock stratum, along on from basement rock to the direction of alluvium, the distance between every section of rock stratum s_i =i, wherein i=1,2 ..., n；

Commented according to the lithology that equation below is calculated described standard sample according to the corresponding assessment of rock properties coefficient in each section of rock stratum Valency coefficient p_i, as the lithologic character of described standard sample:

$p_i=\frac{\underset{i=1}{\overset{n}{\σ}}{m}_i{q}_i}{\underset{i=1}{\overset{n}{\σ}}{m}_i},$

Wherein, m_iRepresent the normal thickness of i-th section of rock stratum in n section rock stratum, m_i=s_iCos α, α represent the rock stratum of i-th section of rock stratum Inclination angle, q_iRepresent the corresponding assessment of rock properties coefficient in i-th section of rock stratum in n section rock stratum.

2. the acquisition methods of Heavy work mining area according to claim 1 soil body depression response are it is characterised in that extract institute State the lithologic character of sample to be identified, comprising:

Described sample to be identified is divided into n section rock stratum, along on from basement rock to the direction of alluvium, the distance between every section of rock stratum s_j=j, wherein j=1,2 ..., n；

It is calculated the lithology of described sample to be identified according to the corresponding assessment of rock properties coefficient in each section of rock stratum according to equation below Evaluation coefficient p_j, as the lithologic character of described sample to be identified:

$p_j=\frac{\underset{j=1}{\overset{n}{\σ}}{m}_j{q}_j}{\underset{j=1}{\overset{n}{\σ}}{m}_j},$

Wherein, m_jRepresent the normal thickness of n section rock stratum ZhongjDuan rock stratum, m_j=s_jCos α, α represent the rock stratum of jth section rock stratum Inclination angle, q_jRepresent the corresponding assessment of rock properties coefficient in n section rock stratum ZhongjDuan rock stratum.

3. the acquisition methods of Heavy work mining area according to claim 2 soil body depression response are it is characterised in that according to institute State standard sample and the lithologic character of sample to be identified determines that the basement rock with described Heavy work mining area has the thin of similar features Alluvium mining area, comprising:

Described standard sample and sample to be identified are calculated according to the assessment of rock properties coefficient of described standard sample and sample to be identified Similarity；

Described similarity and standard value are compared, by sample pair to be identified minimum with the difference of standard value for described similarity The thin alluvium mining area answered has the thin alluvium mining area of similar features as the basement rock with described Heavy work mining area.

4. the acquisition methods of Heavy work mining area according to claim 3 soil body depression response are it is characterised in that according to institute State standard sample and the assessment of rock properties coefficient described standard sample of calculating of sample to be identified and the similarity of sample to be identified, bag Include:

Described standard sample and mark to be identified are calculated according to the assessment of rock properties coefficient of described standard sample and sample to be identified Degree of membership between this；

It is calculated the similarity of described standard sample and sample to be identified according to described degree of membership.

5. the acquisition methods of Heavy work mining area according to claim 4 soil body depression response are it is characterised in that according to institute State standard sample and the assessment of rock properties coefficient of sample to be identified is calculated the person in servitude between described standard sample and sample to be identified Genus degree, including:

Assessment of rock properties coefficient according to described standard sample and sample to be identified is calculated described standard mark according to equation below Degree of membership u of this i-th section of rock stratum and sample to be identified between_i, wherein i=1,2 ..., n:

$u_i=1.0-\frac{\left|p_i-p_j\right|}{p_i}.$

6. the acquisition methods of Heavy work mining area according to claim 5 soil body depression response are it is characterised in that according to institute State the similarity that degree of membership is calculated described standard sample and sample to be identified, comprising:

Calculate similarity c of described standard sample and m sample to be identified according to described degree of membership according to equation below_k, wherein k =1,2 ..., m:

$c_k=\frac{\σu_i}{n}.$