CN103809215A - 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

The acquisition methods of mining area, a kind of thick water-borne sediments soil body depression response

Technical field

The present invention relates to mining technology, relate in particular to the acquisition methods of mining area, a kind of thick water-borne sediments soil body depression response.

Background technology

In the Coal Mining Area of China, mine geology is down followed successively by water-borne sediments and basement rock from earth's surface, and wherein, basement rock comprises superincumbent stratum, coal seam and floor strata.According to the geologic feature in mining area, mining area is divided into different kinds, take the thickness characteristics of water-borne sediments as example, conventionally the mining area that alluvium thickness is less than to 50m is called thin alluvium mining area, the mining area that alluvium thickness is greater than to 100m is called mining area, thick water-borne sediments, and the mining area that alluvium thickness is greater than to 300 meters is called inwash mining area.In the process that coal seam is exploited and exploitation finish after, lack the supporting role in coal seam, can there is depression phenomenon in water-borne sediments, the superincumbent stratum of top, coal seam, stability and the security of the Architectural Equipment of depression phenomenon to earth's surface have a certain impact, therefore, need to obtain the subsidence parameter in mining area, so that subsidence is analyzed, and then take suitable means to avoid depression phenomenon to cause serious impact to Architectural Equipment.

The acquisition methods of currently used subsidence parameter is mainly set for mining area, Huo Wu water-borne sediments, thin alluvium mining area, and for mining area, thick water-borne sediments, because its water-borne sediments is thicker, the parameter acquiring method that mining area, Huo Wu water-borne sediments, thin alluvium mining area is adopted can not be suitable for.At present, acquisition methods to mining area, thick water-borne sediments inside soil body subsidence parameter mainly adopts the mode such as laboratory experiment and numerical simulation, this mode only can be analyzed mining area surface phenomena, for example get subsidence coefficient the scope of subsidence is analyzed etc., and can not monitor the variation characteristic of Rock And Soil complicated in mining area, thick water-borne sediments.Therefore, obtain the characteristic parameter of mining area, thick water-borne sediments inside soil body depression response, so that its subsidence response is analyzed and become a great problem urgently to be resolved hurrily in this area.

Summary of the invention

The invention provides the acquisition methods of mining area, a kind of thick water-borne sediments soil body depression response, for the subsidence parameter of mining area, thick water-borne sediments inside soil body is obtained, analyze with the soil body depression response to mining area, thick water-borne sediments.

The embodiment of the present invention provides the acquisition methods of mining area, a kind of thick water-borne sediments soil body depression response, comprising:

Obtain the subsidence parameter in mining area, thick water-borne sediments;

Obtain the subsidence parameter with the basement rock in mining area, described thick water-borne sediments with the thin alluvium mining area of similar features, as the reference parameter of mining area, described thick water-borne sediments soil body lower boundary;

Calculate the inside soil body subsidence parameter in mining area, described thick water-borne sediments according to the reference parameter of the subsidence parameter in mining area, described thick water-borne sediments and described soil body lower boundary, analyze with the soil body depression response to mining area, described thick water-borne sediments.

The acquisition methods of mining area, thick water-borne sediments as above soil body depression response, obtain the subsidence parameter with the basement rock in mining area, described thick water-borne sediments with the thin alluvium mining area of similar features, as the reference parameter of mining area, described thick water-borne sediments soil body lower boundary, comprising:

Determine the thin alluvium mining area with the basement rock in mining area, described thick water-borne sediments with similar features;

Obtain the subsidence parameter in described thin alluvium mining area, as the reference parameter of mining area, described thick water-borne sediments soil body lower boundary.

The acquisition methods of mining area, thick water-borne sediments as above soil body depression response, determines the thin alluvium mining area with the basement rock in mining area, described thick water-borne sediments with similar features, comprising:

Gather the boring column sample of mining area, thick water-borne sediments basement rock as standard sample;

Gather the boring column sample of thin alluvium to be identified mining area basement rock as sample to be identified;

Extract respectively the rock signature of described standard sample and sample to be identified;

Determine the thin alluvium mining area with the basement rock in mining area, described thick water-borne sediments with similar features according to the rock signature of described standard sample and sample to be identified.

The acquisition methods of mining area, thick water-borne sediments as above soil body depression response, extracts the rock signature of described standard sample, comprising:

Described standard sample is divided into n section rock stratum, along the direction from basement rock to water-borne sediments, the distance S between every section of rock stratum _i=i(i=1,2 ..., n);

Calculate the assessment of rock properties FACTOR P of described standard sample according to following formula according to each section of assessment of rock properties coefficient corresponding to rock stratum _i, the rock signature as 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 section rock stratum in n section rock stratum, q _irepresent assessment of rock properties coefficient corresponding to i section rock stratum in n section rock stratum.

The acquisition methods of mining area, thick water-borne sediments as above soil body depression response, extracts the rock signature of described sample to be identified, comprising:

Described sample to be identified is divided into n section rock stratum, along the direction from basement rock to water-borne sediments, the distance S between every section of rock stratum _j=j(j=1,2 ..., n);

Calculate the assessment of rock properties FACTOR P of described sample to be identified according to following formula according to each section of assessment of rock properties coefficient corresponding to rock stratum _j, the rock signature as 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 j section rock stratum in n section rock stratum,

q _jrepresent assessment of rock properties coefficient corresponding to j section rock stratum in n section rock stratum.

The acquisition methods of mining area, thick water-borne sediments as above soil body depression response, determines the thin alluvium mining area with the basement rock in mining area, described thick water-borne sediments with similar features according to the rock signature of described standard sample and sample to be identified, comprising:

According to the similarity of standard sample described in the assessment of rock properties coefficient calculations of described standard sample and sample to be identified and sample to be identified;

Described similarity and standard value are compared, and the thin alluvium mining area that described similarity is corresponding with the sample to be identified of the difference minimum of standard value is as having the thin alluvium mining area of similar features with the basement rock in mining area, described thick water-borne sediments.

The acquisition methods of mining area, thick water-borne sediments as above soil body depression response, according to the similarity of standard sample described in the assessment of rock properties coefficient calculations of described standard sample and sample to be identified and sample to be identified, comprising:

Obtain the degree of membership between described standard sample and sample to be identified according to the assessment of rock properties coefficient calculations of described standard sample and sample to be identified;

Calculate the similarity of described standard sample and sample to be identified according to described degree of membership.

The acquisition methods of mining area, thick water-borne sediments as above soil body depression response, obtains the degree of membership between described standard sample and sample to be identified according to the assessment of rock properties coefficient calculations of described standard sample and sample to be identified, comprising:

According to the assessment of rock properties coefficient of described standard sample and sample to be identified according to following formula calculate i section between described standard sample and sample to be identified (i=1,2 ..., n) the degree of membership u of rock stratum _k:

$u_i=1.0-\frac{|P_i-P_j|}{P_i}.$

The acquisition methods of mining area, thick water-borne sediments as above soil body depression response, calculates the similarity of described standard sample and sample to be identified according to described degree of membership, comprising:

Calculate the similarity C of described standard sample and m sample to be identified according to following formula according to described degree of membership _k(k=1,2 ..., m):

$C_k=\frac{\mathrm{\Σ}{u}_i}{n}.$

The technical scheme that the embodiment of the present invention provides, by choosing a thin alluvium mining area the most similar to the basement rock in mining area, thick water-borne sediments, obtain respectively the subsidence parameter in mining area, thick water-borne sediments and thin alluvium mining area, and soil body downstream condition using the subsidence parameter in thin alluvium mining area as water-borne sediments, mining area, thick water-borne sediments, soil body upper boundary conditions using the subsidence parameter in mining area, thick water-borne sediments as water-borne sediments, according to water-borne sediments soil body upper boundary conditions and downstream condition, soil body depression response characteristic and the subsidence singularity to mining area, thick water-borne sediments is calculated and is analyzed, obtain thick water-borne sediments mining area surface depression response characteristic parameters, and then analyze the Surface Subsidence Mechanism in mining area, thick water-borne sediments, so that the singularity of thick water-borne sediments mining area surface depression is comprehensively explained, solve a great problem of the prior art.

Accompanying drawing explanation

The process flow diagram of the acquisition methods that mining area, the thick water-borne sediments soil body depression that Fig. 1 provides for the embodiment of the present invention responds;

Fig. 2 is mining area stratigraphic distribution schematic diagram;

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

Fig. 4 is the structural representation of thick water-borne sediments surface subsidence.

Embodiment

The process flow diagram of the acquisition methods that mining area, the thick water-borne sediments soil body depression that Fig. 1 provides for the embodiment of the present invention responds.The present embodiment provides the acquisition methods of mining area, a kind of thick water-borne sediments soil body depression response, can carry out systematic study to the depression response of mining area, the thick water-borne sediments soil body and subsidence singularity mechanism, so that the singularity of thick water-borne sediments mining area surface depression is comprehensively explained, as shown in Figure 1, the method can comprise:

Step 10, obtain the subsidence parameter in mining area, thick water-borne sediments.

Step 20, obtain the subsidence parameter with the basement rock in mining area, thick water-borne sediments with the thin alluvium mining area of similar features, as the reference parameter of mining area, thick water-borne sediments soil body lower boundary.

Step 30, calculate the inside soil body subsidence parameter in mining area, thick water-borne sediments according to the reference parameter of the subsidence parameter in mining area, thick water-borne sediments and soil body lower boundary, analyze with the soil body depression response to mining area, thick water-borne sediments.

Wherein, obtain the subsidence parameter in mining area, thick water-borne sediments and specifically can set up research station on the earth's surface in mining area, thick water-borne sediments, earth's surface to mining area, thick water-borne sediments is measured, obtain subsidence parameter, specifically can realize according to technical scheme conventional in prior art, the for example earth's surface within the scope of mining effect, set a series of observation stations that connect each other, in mining activity process, the volume coordinate of the each observation station of periodic measurement and the variable quantity of relative position, by the back analysis of measured data being obtained to the subsidence parameter of actual measurement, as thick water-borne sediments soil body upper boundary conditions.

Then determine a thin alluvium mining area more similar to the basement rock feature in mining area, thick water-borne sediments, in the present embodiment, can determine a thin alluvium mining area, also can determine that one without mining area, water-borne sediments, the mining area that the thickness that this thin alluvium mining area refers to water-borne sediments is less than 50 meters, refers to the mining area that there is no water-borne sediments without mining area, water-borne sediments.The present embodiment is only elaborated to technical scheme as an example of thin alluvium mining area example, and the technical scheme that those skilled in the art can provide according to the present embodiment also can be chosen without mining area, water-borne sediments and realize.No matter be that mining area, thick water-borne sediments or the water-borne sediments in thin alluvium mining area are soil structures.

After determining a thin alluvium mining area more similar to the basement rock feature in mining area, thick water-borne sediments, obtain the subsidence parameter in this thin alluvium mining area, as the reference parameter of water-borne sediments, mining area, thick water-borne sediments soil body lower boundary (that is: the interface of water-borne sediments and basement rock).Specifically can set up research station on the earth's surface in thin alluvium mining area, earth's surface to thin alluvium mining area is measured, obtain subsidence parameter, specific implementation can be identical with the mode of setting up research station on the earth's surface of thick water-borne sediments, according to the thin alluvium mining area surface volume coordinate of each observation station and the variable quantity of relative position, go out to survey subsidence parameter by back analysis, be the subsidence parameter in thin alluvium mining area, the downstream condition using this as the thick water-borne sediments soil body.

Fig. 2 is mining area stratigraphic distribution schematic diagram, and as shown in Figure 2, stratum, mining area is divided into the water-borne sediments soil body and basement rock downwards successively from earth's surface, and wherein, basement rock is divided into superincumbent stratum, coal seam and floor strata.Because the water-borne sediments in thin alluvium mining area is relatively very thin, if the basement rock feature in its basement rock and mining area, thick water-borne sediments is similar, the variation characteristic of the earth's surface variation characteristic in thin alluvium mining area and mining area, thick water-borne sediments basement rock upper surface (being water-borne sediments lower surface) is similar, depression parameter (being the downstream condition of the water-borne sediments soil body) that can be using the subsidence parameter in thin alluvium mining area as water-borne sediments, mining area, thick water-borne sediments lower surface, and combine and analyze with the subsidence parameter (being the upper boundary conditions of the water-borne sediments soil body) in mining area, thick water-borne sediments, to obtain the inside soil body depression response characteristic in mining area, thick water-borne sediments, to realize, the soil body depression response in mining area, thick water-borne sediments is analyzed.

Above-mentioned definite thin alluvium mining area more similar to the basement rock feature in mining area, thick water-borne sediments, during the mode of employing has a lot, the present embodiment provides a kind of mode that can realize:

First, gather the boring column sample of mining area, thick water-borne sediments basement rock as standard sample, gather the boring column sample of thin alluvium to be identified mining area basement rock as sample to be identified, then extract respectively the rock signature of standard sample and sample to be identified, determine the thin alluvium mining area with the basement rock in mining area, thick water-borne sediments with similar features according to the rock signature of standard sample and sample to be identified.

The technical scheme that the present embodiment provides is the comparison to basement rock characteristic, wherein, the mode that gathers the boring column sample in mining area, thick water-borne sediments can be holed downwards on the earth's surface in mining area, thick water-borne sediments, then remove the water-borne sediments in the column sample collecting, the remaining basement rock that is, as standard sample.

For the deterministic process in thin alluvium mining area, can choose multiple thin alluviums mining area and carry out collection of specimens, compare with the standard sample in mining area, thick water-borne sediments respectively, determine one the most similar.Specifically can hole downwards on the earth's surface in each thin alluvium mining area, then remove the water-borne sediments in the column sample that collects, the remaining basement rock that is, as sample to be identified.

Extract respectively the rock signature of standard sample and sample to be identified, specifically can adopt following technical scheme to realize:

(1) extract the rock signature of standard sample, standard sample can be divided into n section rock stratum, along the direction from basement rock to water-borne sediments, take the upper surface in coal seam as initial point, the upwards distance S between every section of rock stratum _i=i(i=1,2 ..., n).Then calculate the assessment of rock properties FACTOR P of standard sample according to following formula according to each section of assessment of rock properties coefficient corresponding to rock stratum _i, the rock signature as 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 section rock stratum in n section rock stratum,

q _irepresent assessment of rock properties coefficient corresponding to i section rock stratum in n section rock stratum, can come Q with reference to table one _iset.For example, in the time that the 2nd section of rock stratum is stiff clay matter schist, Q ₂can value be 0.4.

Table one assessment of rock properties coefficient reference value

Rock title	Assessment of rock properties coefficient
		Hard ls, Hd.sd., hard marble, not hard grouan	0.0
Harder ls, sandstone, marble	0.05
		Common sandstone, iron ore	0.1
Arenaceous shale, sheet sandstone	0.2
		Stiff clay matter schist, not hard sandstone and ls, soft conglomerate	0.4
Various shale (not hard), fine and close muddy limestone	0.6
		Soft shale, very soft rock limestone, stone coal, common muddy limestone	0.8
Broken shale, bituminous coal, clay (densification)	0.9
		Soft sandy clay, loess, soft gravel, loose sand	1.0

(2) extract the rock signature of sample to be identified, sample to be identified can be divided into n section rock stratum, along the direction from basement rock to water-borne sediments, take the upper surface in coal seam as initial point, the upwards distance S between every section of rock stratum _j=j(j=1,2 ..., n).Calculate the assessment of rock properties FACTOR P of sample to be identified according to following formula according to each section of assessment of rock properties coefficient corresponding to rock stratum _j, the rock signature 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 j section rock stratum in n section rock stratum, q _jrepresent assessment of rock properties coefficient corresponding to j section rock stratum in n section rock stratum, also can set with reference to table one.

Above-mentioned standard sample and sample to be identified being carried out to segmentation according to arithmetic series, is the sinking effect difference of considering different rock-layers in superincumbent stratum, and as shown in Figure 3, Fig. 3 is the distribution schematic diagram of each rock stratum in superincumbent stratum.Superincumbent stratum can be divided into loose alluvium band, sagging zone, slit band and caving zone from top to bottom successively, in the sample collecting, larger apart from Yue Jin rock stratum, coal seam affected by exploitation, and in fracture band, the impact of rock mass is larger.

After extracting the rock signature of standard sample and sample to be identified, determine the thin alluvium mining area with the basement rock in mining area, thick water-borne sediments with similar features according to the rock signature of standard sample and sample to be identified, specifically can be according to the assessment of rock properties FACTOR P of standard sample _iassessment of rock properties FACTOR P with sample to be identified _jthe similarity of calculating standard sample and sample to be identified.

The mode of calculating similarity has a variety of, for example in the following way: according to the assessment of rock properties FACTOR P of standard sample _iassessment of rock properties FACTOR P with sample to be identified _jcalculate the degree of membership between standard sample and sample to be identified, as: according to following formula calculate i section between standard sample and sample to be identified (i=1,2 ..., n) the 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 _icalculate the similarity between standard sample and each sample to be identified, specifically can calculate according to following formula the similarity C of standard sample and m sample to be identified _k(k=1,2 ..., m):

$C_k=\frac{\mathrm{\Σ}{u}_i}{n}.$

By similarity C _kcompare with standard value, this standard value can be 1.00.By similarity C _kthe thin alluvium mining area corresponding with the sample to be identified of 1.00 difference minimum be considered as with the basement rock in mining area, thick water-borne sediments do approaching, as thering is the thin alluvium mining area of similar features with the basement rock in mining area, thick water-borne sediments.

The technical scheme providing according to foregoing, determine approach the thin alluvium mining area of mining area, thick water-borne sediments basement rock most after, set up research station on the earth's surface in thin alluvium mining area, obtain subsidence parameter.Then using the depression parameter of the subsidence parameter in thin alluvium mining area water-borne sediments soil body lower boundary in mining area, thick water-borne sediments, combine and analyze with the subsidence parameter in mining area, thick water-borne sediments, to obtain the soil body depression response characteristic in mining area, thick water-borne sediments.

Specifically can be with reference to Fig. 4, Fig. 4 is the structural representation of thick water-borne sediments subsidence, in Fig. 4, water-borne sediments and basement rock is separated, and only describes for the technical scheme to the present embodiment.In actual mining area, the lower surface of water-borne sediments is the upper surface of basement rock (being also the interface of the water-borne sediments soil body and basement rock).After coal seam is plucked out of, form goaf, lacked the supporting role in coal seam, superincumbent stratum generation inbreak, absciss layer and bending, be then upwards passed to the water-borne sediments soil body gradually, and the water-borne sediments soil body is sunk.Water-borne sediments soil body generation sinking can cause the soil body to follow the response of sinking, the fixed sinking of dehydration and soil body compaction subsiding three aspects:.And the thick water-borne sediments soil body with the form going down of load until goaf, because the stress that acts on basement rock and goaf increases, be subject to the interior fragmented rock body compacting more of gob caving band of water-borne sediments load impact, the broken swollen property of rock reduces, in slit band, be tending towards closed along slabbing gap and absciss layer, the space cementing out is delivered to earth's surface, causes Rock And Soil synergy sinking response, increases the deflection on earth's surface.

According to the depression parameter of water-borne sediments upper surface and lower surface, can, according to the physico-mechanical properties of the soil body, calculate the sinking situation of each soil layer by the method for mechanics.The inside soil body subsidence parameter in mining area, thick water-borne sediments can be many kinds of parameters, specifically can be with reference to adopted parameters being analyzed in mining area, Huo Wu water-borne sediments, thin alluvium mining area in prior art, its concrete analytical approach also can realize with reference to method conventional in prior art.For example can adopt probability integration process conventional in prior art according to the surface subsidence value (being equivalent to the dark change of adopting of thin alluvium mining area large) in the mining area, the thick water-borne sediments of actual measurement depression calculation of parameter in thin alluvium mining area, the soil body that obtains mining area, thick water-borne sediments is followed sinking; According to thick water-borne sediments mining area surface, actual measurement is sunk and the sinking of following of calculating, and asks its difference to obtain corresponding water-borne sediments soil body depression response curve.Then follow the difference between sinking parameter according to the depression parameter of water-borne sediments lower surface and the soil body, obtain the additional sinking parameter of the soil body and corresponding curve, can analyze the situation of the fixed sinking of dehydration, soil body compaction subsiding and the sinking of ground synergy according to this additional sinking parameter and curve.

The technical scheme that the present embodiment provides, by choosing a thin alluvium mining area the most similar to the basement rock in mining area, thick water-borne sediments, obtain respectively the subsidence parameter in mining area, thick water-borne sediments and thin alluvium mining area, and soil body downstream condition using the subsidence parameter in thin alluvium mining area as water-borne sediments, mining area, thick water-borne sediments, soil body upper boundary conditions using the subsidence parameter in mining area, thick water-borne sediments as water-borne sediments, according to water-borne sediments soil body upper boundary conditions and downstream condition, soil body depression response characteristic and the subsidence singularity to mining area, thick water-borne sediments is calculated and is analyzed, obtain mining area, thick water-borne sediments inside soil body depression response characteristic parameters, and then analyze the Surface Subsidence Mechanism in mining area, thick water-borne sediments, so that the singularity of thick water-borne sediments mining area surface depression is comprehensively explained, solve a great problem of the prior art.

Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (9)

1. an acquisition methods for mining area, thick water-borne sediments soil body depression response, is characterized in that, comprising:

Obtain the subsidence parameter in mining area, thick water-borne sediments;

Obtain the subsidence parameter with the basement rock in mining area, described thick water-borne sediments with the thin alluvium mining area of similar features, as the reference parameter of mining area, described thick water-borne sediments soil body lower boundary;

Calculate the inside soil body subsidence parameter in mining area, described thick water-borne sediments according to the reference parameter of the subsidence parameter in mining area, described thick water-borne sediments and described soil body lower boundary, analyze with the soil body depression response to mining area, described thick water-borne sediments.

2. the acquisition methods of mining area, thick water-borne sediments according to claim 1 soil body depression response, it is characterized in that, obtain the subsidence parameter with the basement rock in mining area, described thick water-borne sediments with the thin alluvium mining area of similar features, as the reference parameter of mining area, described thick water-borne sediments soil body lower boundary, comprising:

Determine the thin alluvium mining area with the basement rock in mining area, described thick water-borne sediments with similar features;

Obtain the subsidence parameter in described thin alluvium mining area, as the reference parameter of mining area, described thick water-borne sediments soil body lower boundary.

3. the acquisition methods of mining area, thick water-borne sediments according to claim 2 soil body depression response, is characterized in that, determines the thin alluvium mining area with the basement rock in mining area, described thick water-borne sediments with similar features, comprising:

Gather the boring column sample of mining area, thick water-borne sediments basement rock as standard sample;

Gather the boring column sample of thin alluvium to be identified mining area basement rock as sample to be identified;

Extract respectively the rock signature of described standard sample and sample to be identified;

Determine the thin alluvium mining area with the basement rock in mining area, described thick water-borne sediments with similar features according to the rock signature of described standard sample and sample to be identified.

4. the acquisition methods of mining area, thick water-borne sediments according to claim 3 soil body depression response, is characterized in that, extracts the rock signature of described standard sample, comprising:

Described standard sample is divided into n section rock stratum, along the direction from basement rock to water-borne sediments, the distance S between every section of rock stratum _i=i(i=1,2 ..., n);

Calculate the assessment of rock properties FACTOR P of described standard sample according to following formula according to each section of assessment of rock properties coefficient corresponding to rock stratum _i, the rock signature as 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 section rock stratum in n section rock stratum,

q _irepresent assessment of rock properties coefficient corresponding to i section rock stratum in n section rock stratum.

5. the acquisition methods of mining area, thick water-borne sediments according to claim 4 soil body depression response, is characterized in that, extracts the rock signature of described sample to be identified, comprising:

Described sample to be identified is divided into n section rock stratum, along the direction from basement rock to water-borne sediments, the distance S between every section of rock stratum _j=j(j=1,2 ..., n);

Calculate the assessment of rock properties FACTOR P of described sample to be identified according to following formula according to each section of assessment of rock properties coefficient corresponding to rock stratum _j, the rock signature as 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 j section rock stratum in n section rock stratum,

q _jrepresent assessment of rock properties coefficient corresponding to j section rock stratum in n section rock stratum.

6. the acquisition methods of mining area, thick water-borne sediments according to claim 5 soil body depression response, it is characterized in that, determine the thin alluvium mining area with the basement rock in mining area, described thick water-borne sediments with similar features according to the rock signature of described standard sample and sample to be identified, comprising:

According to the similarity of standard sample described in the assessment of rock properties coefficient calculations of described standard sample and sample to be identified and sample to be identified;

Described similarity and standard value are compared, and the thin alluvium mining area that described similarity is corresponding with the sample to be identified of the difference minimum of standard value is as having the thin alluvium mining area of similar features with the basement rock in mining area, described thick water-borne sediments.

7. the acquisition methods of mining area, thick water-borne sediments according to claim 6 soil body depression response, is characterized in that, according to the similarity of standard sample described in the assessment of rock properties coefficient calculations of described standard sample and sample to be identified and sample to be identified, comprising:

Obtain the degree of membership between described standard sample and sample to be identified according to the assessment of rock properties coefficient calculations of described standard sample and sample to be identified;

Calculate the similarity of described standard sample and sample to be identified according to described degree of membership.

8. the acquisition methods of mining area, thick water-borne sediments according to claim 7 soil body depression response, it is characterized in that, obtain the degree of membership between described standard sample and sample to be identified according to the assessment of rock properties coefficient calculations of described standard sample and sample to be identified, comprising:

According to the assessment of rock properties coefficient of described standard sample and sample to be identified according to following formula calculate i section between described standard sample and sample to be identified (i=1,2 ..., n) the degree of membership u of rock stratum _k:

$u_i=1.0-\frac{|P_i-P_j|}{P_i}.$

9. the acquisition methods of mining area, thick water-borne sediments according to claim 8 soil body depression response, is characterized in that, calculates the similarity of described standard sample and sample to be identified according to described degree of membership, comprising:

Calculate the similarity C of described standard sample and m sample to be identified according to following formula according to described degree of membership _k(k=1,2 ..., m):

$C_k=\frac{\mathrm{\Σ}{u}_i}{n}.$

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