Pier type arch linkage type goaf treatment method

A goaf treatment and goaf technology, which is applied in mining equipment, earthwork drilling, filling, etc., can solve the problem of not meeting the requirements of the surface settlement value of surface buildings, slow settlement of the overlying ground layer in the goaf, The problem of high process cost can maximize the production benefits, reduce the amount of engineering, and improve the filling quality.

Active Publication Date: 2018-06-22
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects that the traditional goaf treatment method cannot meet the requirements of surface buildings on the surface settlement value and the high process cost, etc., and provide a method that can fundamentally solve the overlying surface layer of the mine left goaf. Goaf Treatment Method for Slow Settlement and Subsidence

Method used

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  • Pier type arch linkage type goaf treatment method
  • Pier type arch linkage type goaf treatment method
  • Pier type arch linkage type goaf treatment method

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Embodiment Construction

[0070] The specific embodiment and steps of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0071] 1. Determine the key layer. According to the actual hydrogeological exploration data at the site, the position of the key layer 12 on the goaf is determined by comprehensively using three methods: theoretical analysis, numerical simulation and key layer identification software.

[0072] 2. Calculate the load on the key layer 12

[0073] When there are multiple strata in the overlying strata of the stope, the stratum that controls the movement of the rock mass in whole or in part is the key stratum 12, and the self-weight load of all the strata 11 on the key stratum 12 (only one stratum 11 is shown in the figure) for:

[0074]

[0075] In the formula, q—the self-weight load of all (m layer) rock layers above the key layer, KN; E i —Elastic modulus of rock layer i, MPa; h i —thickness of rock layer i, m; γ i —...

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Abstract

The invention discloses a pier type arch linkage type goaf treatment method. A bracing strength of a pier column is obtained mainly through data analysis of a key layer, then a grouting hole is formedin a bottom plate of a goaf from the ground surface, the grouting hole is filled intermittently by using a pipe lifting method to form the pier till the pier is connected with the top of the key layer, and after grouting filling is completed, residual grouting holes are filled and sealed. A pier type arch linkage structure is formed by utilizing mutual cooperation of the pier formed after grouting filling aggregate is solidified and a caving top plate covering the goaf, and the stability of the top plate of the goaf is maintained.

Description

technical field [0001] The invention relates to the field of mining, in particular to a "pier-type double-arch" type goaf treatment method. Background technique [0002] The demand for resources in social and economic development is increasing day by day, and the mining of underground resources will inevitably lead to the formation of goafs. The settlement and subsidence of goafs will have a great impact on surface buildings, especially bridges, railways, houses, etc. Surface buildings that require higher surface settlement values. In order to minimize the settlement of the goaf surface layer, control the settlement value within a reasonable range, prevent the damage of the surface buildings in the goaf area, and ensure the safety and stability of the overlying surface buildings located in the goaf area, the traditional gob Area treatment methods usually include five treatment methods: natural caving method, caving method, filling method, coal pillar support method, and clo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00
CPCE21F15/00E21F15/005
Inventor 宁建国姜宁邱鹏奇徐强
Owner SHANDONG UNIV OF SCI & TECH
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