Grouting water disaster prevention and control method considering mining-induced fracture influence

A grouting and water hazard technology, applied in drainage, mining equipment, earth-moving drilling, etc., can solve problems such as rock movement control, overburden damage, etc., and achieve the effect of solving water hazard prevention and control.

Pending Publication Date: 2021-11-02
XUCHANG UNIV
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Problems solved by technology

[0003] Coal seam group mining has two methods: upward mining and downward mining. After the mining of the previous coal seam is completed, the mining of the subsequent coal seam...

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  • Grouting water disaster prevention and control method considering mining-induced fracture influence

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Embodiment Construction

[0031] A grouting water disaster prevention method considering the impact of mining fissures, the working conditions include an upper coal seam and a lower coal seam with similar distances; the distance between the upper coal seam and the lower coal seam is Hj, that is, the thickness of the rock layer between the upper coal seam and the lower coal seam is Hj; There is an aquifer at a short distance above the upper coal seam, and the distance between the upper coal seam and the aquifer is Hh; the water damage comes from the aquifer, and the mining fracture is the collapse zone and water-conducting fracture zone produced by coal seam mining;

[0032] The method for preventing and controlling water damage comprises the steps of:

[0033] S1, according to the overlying rock lithology above the coal seam, combined with the mining height of the coal seam, determine the caving zone heights Hks, Hkx, and water-conducting fissure zone heights Hds, Hdx when the upper coal seam and the lo...

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Abstract

The invention belongs to the field of mine water disaster prevention and control, and particularly relates to a grouting water disaster prevention and control method considering mining-induced fracture influence based on a close-distance coal seam repeated mining-induced working condition. The invention discusses a grouting water disaster prevention and control method when a close-range aquifer exists above an upper coal seam under the condition of two close-range coal seams, and aims to provide reference for water and sand prevention and control mining of a close-range coal seam group. A buffer layer is formed through presplitting to reduce the height of a water flowing fissure zone, and a water-resisting layer is formed through grouting, so that water disaster prevention and control under the condition of repeated mining of a close-distance coal seam are achieved.

Description

technical field [0001] The invention belongs to the field of mine water disaster prevention and control, and in particular relates to a grouting water disaster prevention and control method based on the repeated mining of short-distance coal seams and considering the influence of mining fissures. Background technique [0002] Coal usually occurs underground in the form of multiple layers, forming coal seam groups. Most underground coal mines will face the situation of mining multiple coal seams (coal seam groups), which are affected by geological conditions such as the thickness of each coal seam, the distance between coal seams, and the lithology of overlying rocks. Coal seam mining has the possibility of interaction, which will greatly increase the possibility of disasters during mining, especially when there is a close aquifer above the coal seam group. [0003] Coal seam group mining has two methods: upward mining and downward mining. After the mining of the previous coa...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/38E21F16/00
CPCE21D11/10E21D11/381E21F16/00E21C41/18
Inventor 杨滨滨
Owner XUCHANG UNIV
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