A Method for Evaluation of Foundation Stability in Coal Mining Subsidence Area

An evaluation method and technology for subsidence areas, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as impacts on ground buildings, endangering normal safe operation, and concentrated deformation

Inactive Publication Date: 2018-08-31
TANGSHAN BRANCH COAL SCI ACAD
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  • Description
  • Claims
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Problems solved by technology

After the coal seam is mined, the overlying strata will form a caving fault zone, and its overall strength and stiffness will decrease significantly. Movement and deformation, even concentrated deformation, will have a significant impact on ground buildings and endanger their normal and safe operation

Method used

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  • A Method for Evaluation of Foundation Stability in Coal Mining Subsidence Area
  • A Method for Evaluation of Foundation Stability in Coal Mining Subsidence Area
  • A Method for Evaluation of Foundation Stability in Coal Mining Subsidence Area

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Embodiment 1

[0088] A residential area in Pingdingshan plans to build a 13-story (39m high) residential building, and the proposed area is located above the goaf. The coal seam mined in the goaf is Group E coal seam, the thickness of the coal seam is 5.0m, the inclination angle of the coal seam is 8-10°, and the minimum mining depth is about 87m. The mining time is from 1966 to 1973. The sinking method manages the top plate.

[0089] After calculation, the building load influence depth (H 影 ) is 33m (refer to Table 3), and the height of the goaf caving fault zone (H 裂 ) is 48.7m (calculated according to the maximum height formula of the water-conducting fracture zone in the mining of gently inclined thick coal seams in Table 2), the sum of the two is 81.7m, and the minimum mining depth of the coal seam below this area (H 采 ) is 87m. According to the analysis and evaluation, the depth of the goaf will not overlap with the depth of the load influence of the newly built 13-storey building ...

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Abstract

The invention discloses a method for evaluating the foundation stability of a coal mining subsidence area. The method comprises the following steps of (1) calculating the height of a caving fracture zone: according to different geological and mining conditions, measuring related parameters and selecting a calculation formula or an empirical formula for the height of the caving fracture zone; (2) calculating the load impact depth of the coal mining subsidence area: according to the geological stratum conditions of a goaf, analyzing the gravity stress and additional ground stress of a foundation and determining a calculation method for the building load impact depth of the coal mining subsidence area; and (3) evaluating the foundation stability of the coal mining subsidence area: according to a mutual relation among the mining depth H<mining> of a coal seam, the height H<fracture> of the caving fracture zone in the coal mining subsidence area and the building load impact depth H<impact>, evaluating the foundation stability of the coal mining subsidence area. The method is suitable for foundation stability evaluation of different mining methods and mining processes under different geological and mining conditions, and is wider in application range and good in evaluation effect.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of coal mining subsidence areas, and relates to an evaluation method for foundation stability of coal mining subsidence areas, in particular to an evaluation method for foundation stability of newly built (structure) structures in coal mining subsidence areas. Background technique [0002] The large-scale mining of coal resources in the mining area has left a large area of ​​goaf, and the residual cavity or ruptured rock mass in the goaf has changed the engineering geological characteristics and properties of the stratum and rock mass, forming complex foundation conditions with poor engineering geology, which hinders utilization The use of the surface of the coal mining subsidence area as construction land brings difficulties and hidden dangers, which seriously restricts the development of urbanization in the mining area. In recent years, the urban engineering construction in my country's ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06Q50/02G06Q50/08
CPCG06F30/13G06Q50/02G06Q50/08
Inventor 滕永海唐志新易四海郭轲轶郑志刚朱伟李悦
Owner TANGSHAN BRANCH COAL SCI ACAD
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