Method for evaluating stability of newly built railway foundation on goaf

An evaluation method and goaf technology, which is applied in the field of foundation soil survey, construction, and infrastructure engineering, etc., can solve the problem of failure to fully consider the geological and mining conditions of the mining area, mining technology, mining methods, and calculation results. Problems such as hidden dangers of railway construction in empty areas have achieved the effect of promoting sustainable development, mitigating the reduction, and making the evaluation results reasonable

Inactive Publication Date: 2012-01-25
SHANXI LUAN MINING GRP +1
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Problems solved by technology

[0013] Using the calculation formula of the safe mining depth before the present invention does not fully consider the specific geological mining conditions and mining technology and...

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  • Method for evaluating stability of newly built railway foundation on goaf
  • Method for evaluating stability of newly built railway foundation on goaf
  • Method for evaluating stability of newly built railway foundation on goaf

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Embodiment Construction

[0019] The present invention is further described by an embodiment below, and the present invention is not limited to the embodiment.

[0020] The coal-based synthetic oil railway line of Lu'an Group is located in the west of Yuwu Coal Mine Industrial Square, above the north wing of the second south mining area of ​​Yuwu Coal Mine, with three working faces S2105, S2106, and S2107 below, and the mining coal seam is No. 3 coal of Shanxi Group. The thickness of the coal seam is 5.31-5.35m, the average is 5.33m, the inclination angle is 2.2-12.5°, and the average mining depth is 511m. The thickness of the Quaternary loess layer is 28.40-74.65m.

[0021] After calculation, the development height of the caving fault zone in the goaf in this area is 117.2m, the impact depth (H shadow) of the railway boxcar load is 31m, the sum of the two is 148.2m, and the minimum mining depth of the coal seam in this area is 482m. Therefore, The load of the newly built railway will not cause large u...

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Abstract

The invention belongs to the technical field of coal mining collapse, and in particular relates to a method for evaluating the stability of a newly built railway foundation on a goaf. The method comprises three parts, namely goaf foundation stability analysis, roadbed residual subsidence deformation and mining influence evaluation. Compared with a calculation method recommended in Railway Geological Engineering Manual, the method has the advantages that: the method is more suitable for foundation stability evaluation of different mining methods or mining processes under various geological mining conditions, and the damage characteristic of overlying strata of coal beds and earth surface load influence depth are fully considered; and the method is suitable for foundation stability evaluation of different mining methods or mining processes under different geological mining conditions, is wide in application range and reasonable and reliable in evaluation result, and has good reference significance for foundation stability evaluation of newly built railways in the Lu'an mine district and other mine development goaf. The method has great significance for accelerating the development of the transportation industry of mining areas, solving the problem that the available land of the mining areas is gradually reduced and promoting the sustainable development of the mining area economy.

Description

Technical field: [0001] The invention belongs to the technical field of coal mining subsidence, in particular to an evaluation method for the foundation stability of newly built railways in goafs. Background technique: [0002] Lu'an mining area is an important production base of coal resources in my country. In recent years, with the rapid development of coal and related industries, the pressure of transportation in the mining area has become increasingly obvious, which has affected the normal development of enterprises. However, the goaf (moving) area is densely distributed in the mining area, which brings difficulties to the construction of the railway in the mining area and seriously restricts the sustainable development of the mining area economy. [0003] The Lu'an mining area belongs to the Qinshui coalfield, where the 3# thick coal seam of the Permian Shanxi Formation is mainly mined. The overlying strata are composed of sandstone, mudstone, sandy mudstone and Quater...

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Application Information

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IPC IPC(8): E02D1/00
Inventor 崔振清滕永海谢建军郑志刚陈红春
Owner SHANXI LUAN MINING GRP
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