CN108446450B - Method for analyzing and calculating damage degree of building influenced by mining - Google Patents
Method for analyzing and calculating damage degree of building influenced by mining Download PDFInfo
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Abstract
The invention belongs to the technical field of mineral engineering, and relates to an analysis and calculation method for the damage degree of a building influenced by mining. And selecting six influence factors of the horizontal deformation value of the building after coal seam mining, the plane area generating the horizontal deformation, the plane area generating the inclined deformation and the inclined deformation, the plane area generating the curvature deformation and the curvature deformation as the evaluation indexes of the damage degree of the building influenced by mining. The method for analyzing and calculating the damage degree of the building influenced by mining evaluates the damage degree of the building on the whole, can accurately analyze the influence damage condition of the coal seam on the building after mining, provides scientific basis for safe use of the building after mining, and is suitable for wide popularization and application.
Description
Technical Field
The invention belongs to the technical field of mineral engineering, and relates to an analysis and calculation method for the damage degree of a building influenced by mining.
Background
China is rich in coal resources, and not only a large amount of coal resources exist underground in plains, mountainous regions and other areas, but also a large amount of coal resources exist under a plurality of buildings. For a long time, China always adopts a strip mining or filling mining method to mine a large amount of coal resources under buildings. After the coal resources under the building are mined, the mining influence can be caused to the building, the building can be damaged in serious conditions, and even the building collapses, so that the life safety is threatened. At present, after coal and carbon resources under buildings in China are mined, influence damage to the buildings is mainly calculated through a probability integral method to obtain deformation values (including horizontal deformation epsilon, inclined deformation i and curvature deformation k) of the buildings, and according to a building damage grade table in building, water, railway and main roadway coal pillar reservation and coal briquetting mining procedures, the damage degree of the buildings is divided into I, II, III and IV grades, but only the deformation value of the buildings is considered, the damage degree of the buildings is not analyzed and evaluated from the damage range, and the damage degree of the buildings after coal seam mining under the buildings cannot be accurately reflected.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides the method for analyzing and calculating the damage degree of the buildings influenced by mining, which is reasonable in analysis and convenient to calculate.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a method for analyzing and calculating the damage degree of a building influenced by mining is characterized by comprising the following steps: the analysis steps are as follows:
1) selecting six influence factors of horizontal deformation of a building deformation value and a plane area generating the horizontal deformation after coal seam mining, inclined deformation and a plane area generating the inclined deformation, curvature deformation and a plane area generating the curvature deformation as evaluation indexes of the damage degree of the building influenced by mining;
2) calculating the horizontal deformation epsilon, the inclined deformation i and the curvature deformation k of the building after coal seam mining by adopting a probability integration method, and respectively superposing a horizontal deformation epsilon contour map, an inclined deformation i contour map and a curvature deformation k contour map with a plan view of the building to obtain a plan area m for generating the horizontal deformation epsilonεPlane area m where inclined deformation i occursiAnd a plane area m where curvature deformation k occursk；
3）Respectively constructing a membership function a of the horizontal deformation epsilon and a plane area m generating the horizontal deformation epsilonεMembership function b of (a), membership function c of oblique deformation i, and area m of plane generating oblique deformation iiMembership function d of (d), membership function e of curvature deformation k, plane area m of generating curvature deformation kkA membership function f;
membership function of horizontal deformation ε:
in the formula: a is the horizontal deformation membership; epsilon is horizontal deformation generated by a building after coal seam mining, and the unit is mm/m (epsilon is used as the horizontal deformation value of the building, has positive or negative, and the absolute value is required to be taken when the epsilon range is determined); e is horizontal deformation which can be borne by the building and has a unit of mm/m;
plane area m generating horizontal deformation epsilonεMembership function of (a):
in the formula: b is the area m of the plane where the horizontal deformation epsilon occursεDegree of membership of; m isεProducing a planar area for the building with a horizontal deformation of epsilon in m2(ii) a M is the plane area of the building, unit M2；
Membership function of tilt deformation i:
in the formula: c is the inclination deformation membership; i is the inclined deformation of the building after coal seam mining, and the unit is mm/m (i is used as the inclined deformation value of the building, has positive or negative values, and needs to take the absolute value when the range of i is determined); i is the inclination deformation which can be borne by the building, and the unit is mm/m;
plane area m of generating inclined deformation iiMembership function of (a):
in the formula: d is the area m of the plane where the inclined deformation i occursiDegree of membership of; m isiProducing a planar area for the building with an oblique deformation of i, in m2(ii) a M is the plane area of the building, unit M2；
Membership function of curvature deformation k:
in the formula: e is the membership of curvature deformation k; k is the curvature deformation of the building after coal seam mining, unit 10-3M (k is used as a curvature deformation value of the building, has positive or negative values, and needs to take an absolute value when a k range is determined); k is the curvature deformation that the building can withstand, unit 10-3/m；
Plane area m generating curvature deformation kkMembership function of (a):
in the formula: f is the area m of the plane where curvature deformation k occurskDegree of membership of; m iskProducing a planar area for a building with a curvature deformation of k, in m2(ii) a M is the plane area of the building, unit M2；
In order to comprehensively evaluate the damage degree of the buildings affected by mining, the a, b, c, d, e and f are subjected to superposition calculation:
λ=βa+γb+δc+ηd+θe+μf
in the formula: lambda is the total membership of the damage degree of the building influenced by mining, beta is the weight of a, gamma is the weight of b, delta is the weight of c, eta is the weight of d, theta is the weight of e, mu is the weight of f, beta, gamma, delta, eta, theta and mu are directly selected according to the actual condition of the building, and are subjected to multiple superposition trial calculation and determined after comprehensive analysis;
4) after all the weights are selected through comprehensive analysis, calculating to obtain the total membership lambda of the damage degree of the building influenced by mining;
5) evaluating the damage condition of the building according to the total membership lambda of the damage degree of the building influenced by mining, wherein the larger the lambda value is, the larger the damage degree of the building is, and the smaller the damage degree of the building is otherwise;
6) and establishing an analysis and calculation model of the damage degree of the building influenced by mining.
Compared with the prior art, the invention has the advantages and positive effects that:
the method for analyzing and calculating the damage degree of the building influenced by mining evaluates the damage degree of the building as a whole, and can accurately analyze the damage condition of the coal seam after mining on the building. Compared with the previous research results, the method considers more influencing factors and enables the evaluation result to be more scientific. According to the specific evaluation result of the patent, the safety of the building can be accurately evaluated, a scientific basis is provided for whether the building can be safely used after coal seam mining, and the method is suitable for wide popularization and application.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, the present invention will be further described with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
Embodiment 1, this embodiment provides specific steps of a method for analyzing and calculating the damage level of a building affected by mining, as follows:
1) selecting six influence factors of horizontal deformation of a building deformation value and a plane area generating the horizontal deformation after coal seam mining, inclined deformation and a plane area generating the inclined deformation, curvature deformation and a plane area generating the curvature deformation as evaluation indexes of the damage degree of the building influenced by mining;
2) calculating the horizontal deformation epsilon, the inclined deformation i and the curvature deformation k of the building after coal seam mining by adopting a probability integration method, and respectively superposing a horizontal deformation epsilon contour map, an inclined deformation i contour map and a curvature deformation k contour map with a plan view of the building to obtain a plan area m for generating the horizontal deformation epsilonεPlane area m where inclined deformation i occursiAnd a plane area m where curvature deformation k occursk；
3) Respectively constructing a membership function a of the horizontal deformation epsilon and a plane area m generating the horizontal deformation epsilonεMembership function b of (a), membership function c of oblique deformation i, and area m of plane generating oblique deformation iiMembership function d of (d), membership function e of curvature deformation k, plane area m of generating curvature deformation kkA membership function f;
membership function of horizontal deformation ε:
in the formula: a is the horizontal deformation membership; epsilon is horizontal deformation of a building generated after coal seam mining, and the unit is mm/m; e is horizontal deformation which can be borne by the building and has a unit of mm/m;
plane area m generating horizontal deformation epsilonεMembership function of (a):
in the formula: b is the area m of the plane where the horizontal deformation epsilon occursεDegree of membership of; m isεProducing a planar area for the building with a horizontal deformation of epsilon in m2(ii) a M is the plane area of the building, unit M2；
Membership function of tilt deformation i:
in the formula: c is the inclination deformation membership; i is the inclined deformation of the building after coal seam mining, and the unit is mm/m; i is the inclination deformation which can be borne by the building, and the unit is mm/m;
plane area m of generating inclined deformation iiMembership function of (a):
in the formula: d is the area m of the plane where the inclined deformation i occursiDegree of membership of; m isiProducing a planar area for the building with an oblique deformation of i, in m2(ii) a M is the plane area of the building, unit M2；
Membership function of curvature deformation k:
in the formula: e is the membership of curvature deformation k; k is the curvature deformation of the building after coal seam mining, unit 10-3(ii)/m; k is the curvature deformation that the building can withstand, unit 10-3/m；
Plane area m generating curvature deformation kkMembership function of (a):
in the formula: f is the area m of the plane where curvature deformation k occurskDegree of membership of; m iskProducing a planar area for a building with a curvature deformation of k, in m2(ii) a M is the plane area of the building, unit M2；
In order to comprehensively evaluate the damage degree of the buildings affected by mining, the a, b, c, d, e and f are subjected to superposition calculation:
λ=βa+γb+δc+ηd+θe+μf
in the formula: λ is the total membership of the degree of destruction of the building affected by mining, β is the weight of a, γ is the weight of b, δ is the weight of c, η is the weight of d, θ is the weight of e, μ is the weight of f. Directly selecting beta, gamma, delta, eta, theta and mu according to the actual condition of the building, performing multiple superposition trial calculation, and determining after comprehensive analysis;
4) after all the weights are selected through comprehensive analysis, calculating to obtain the total membership lambda of the damage degree of the building influenced by mining;
5) evaluating the damage condition of the building according to the total membership lambda of the damage degree of the building influenced by mining, wherein the larger the lambda value is, the larger the damage degree of the building is, and the smaller the damage degree of the building is otherwise;
6) and establishing an analysis and calculation model of the damage degree of the building influenced by mining.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (1)
1. A method for analyzing and calculating the damage degree of a building influenced by mining is characterized by comprising the following steps: the analysis steps are as follows:
1) selecting six influence factors of horizontal deformation of a building deformation value and a plane area generating the horizontal deformation after coal seam mining, inclined deformation and a plane area generating the inclined deformation, curvature deformation and a plane area generating the curvature deformation as evaluation indexes of the damage degree of the building influenced by mining;
2) calculating the horizontal deformation epsilon, the inclined deformation i and the curvature deformation k of the building after coal seam mining by adopting a probability integration method, and summing the horizontal deformation epsilon contour map, the inclined deformation i contour mapThe curvature deformation k contour map is respectively superposed with the plane map of the building to obtain the plane area m generating the horizontal deformation epsilonεPlane area m where inclined deformation i occursiAnd a plane area m where curvature deformation k occursk；
3) Respectively constructing a membership function a of the horizontal deformation epsilon and a plane area m generating the horizontal deformation epsilonεMembership function b of (a), membership function c of oblique deformation i, and area m of plane generating oblique deformation iiMembership function d of (d), membership function e of curvature deformation k, plane area m of generating curvature deformation kkA membership function f;
membership function of horizontal deformation ε:
in the formula: a is the horizontal deformation membership; epsilon is horizontal deformation of a building generated after coal seam mining, and the unit is mm/m; e is horizontal deformation which can be borne by the building and has a unit of mm/m;
plane area m generating horizontal deformation epsilonεMembership function of (a):
in the formula: b is the area m of the plane where the horizontal deformation epsilon occursεDegree of membership of; m isεProducing a planar area for the building with a horizontal deformation of epsilon in m2(ii) a M is the plane area of the building, unit M2；
Membership function of tilt deformation i:
in the formula: c is the inclination deformation membership; i is the inclined deformation of the building after coal seam mining, and the unit is mm/m; i is the inclination deformation which can be borne by the building, and the unit is mm/m;
plane area m of generating inclined deformation iiMembership function of (a):
in the formula: d is the area m of the plane where the inclined deformation i occursiDegree of membership of; m isiProducing a planar area for the building with an oblique deformation of i, in m2(ii) a M is the plane area of the building, unit M2；
Membership function of curvature deformation k:
in the formula: e is the membership of curvature deformation k; k is the curvature deformation of the building after coal seam mining, unit 10-3(ii)/m; k is the curvature deformation that the building can withstand, unit 10-3/m；
Plane area m generating curvature deformation kkMembership function of (a):
in the formula: f is the area m of the plane where curvature deformation k occurskDegree of membership of; m iskProducing a planar area for a building with a curvature deformation of k, in m2(ii) a M is the plane area of the building, unit M2；
In order to comprehensively evaluate the damage degree of the buildings affected by mining, the a, b, c, d, e and f are subjected to superposition calculation:
λ=βa+γb+δc+ηd+θe+μf
in the formula: λ is total membership of the destruction degree of the building affected by mining, β is weight of a, γ is weight of b, δ is weight of c, η is weight of d, θ is weight of e, and μ is weight of f;
4) after all the weights are selected through comprehensive analysis, calculating to obtain the total membership lambda of the damage degree of the building influenced by mining;
5) evaluating the damage condition of the building according to the total membership lambda of the damage degree of the building influenced by mining, wherein the larger the lambda value is, the larger the damage degree of the building is, and the smaller the damage degree of the building is otherwise;
6) and establishing an analysis and calculation model of the damage degree of the building influenced by mining.
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