One-hole grouting and filling dual-purpose method implemented by aid of ground gas extraction drill holes

A gas drilling and gas extraction technology, applied in filling, gas discharge, mining equipment, etc., can solve the problem of single project purpose, do not have such problems, prevent movement and deformation, realize the protection of ground buildings, realize the realization of surface The effect of subsidence control

Active Publication Date: 2016-02-03
HUABEI MINING GRP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, it is no longer possible to carry out pressure relief gas drainage and overlying rock grouting filling as two independent projects, and it should be considered to realize both in the same project, but there is no such means and method in the existing technology , or only use surface ...

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  • One-hole grouting and filling dual-purpose method implemented by aid of ground gas extraction drill holes
  • One-hole grouting and filling dual-purpose method implemented by aid of ground gas extraction drill holes
  • One-hole grouting and filling dual-purpose method implemented by aid of ground gas extraction drill holes

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Embodiment Construction

[0016] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0017] Such as figure 1 As shown, using the ground gas drainage borehole to realize the double-purpose method of grouting filling, using the four-opening hole-forming method to arrange several ground gas boreholes along the working face 3 on the surface 4 above the coal mining face 3. The four-open hole-forming method includes: drilling to form a loose layer cementing section, that is, the first hole, installing the first solid casing 12 in the loose layer cementing section; Drill down until the 10m above the upper adjacent coal seam 6 where the pressurized gas is to be pumped, to form a second opening. The second opening passes through the key layer 5 of the overlying rock of the coal mining face 3. Install the second opening solid casing 11 protective hole in the hole; continue drilling until the 6m above the mining coal seam to form the third opening...

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Abstract

The invention discloses a one-hole grouting and filling dual-purpose method implemented by the aid of ground gas extraction drill holes. The one-hole grouting and filling dual-purpose method is applicable to underground coal mines. The one-hole grouting and filling dual-purpose method includes extracting pressure relief gas of adjacent coal seams by the aid of the first ground gas drill holes in exploitation procedures; tripping grouting stopping wooden plugs in the first ground gas drill holes after extraction is completed and then gas starts to be extracted by the second ground gas drill holes, and cutting second cut solid casings to form cut openings; forming channels communicated with separation layers; grouting and filling separation layer zones; removing the grouting stopping wooden plugs after the separation layers are filled and the gas is completely extracted by the second ground gas drill holes; starting to grout and fill gobs; circularly extracting pressure relief gas of the follow-up ground gas drill holes in an integral coal mining working face and grouting and filling cover rock. The one-hole grouting and filling dual-purpose method has the advantages that the pressure relief gas is extracted while the cover rock is grouted and filled, accordingly, construction of special ground grouting drill holes can be omitted, the difficult problem of filled grout and gas flow interference can be solved, and problems in the aspects of gas extraction and earth surface subsidence control can be solved.

Description

technical field [0001] The invention relates to a grouting filling method, and is especially suitable for a dual-purpose method for grouting and filling in one hole by utilizing ground gas drainage boreholes used in underground coal mines. Background technique [0002] In coal mining, coal mining will lead to the movement of overlying strata and gas migration, and when they develop to a certain extent, mining disasters will be formed, such as surface subsidence (collapse) and gas gushing (outburst). Therefore, controlling the movement of rock formations and extracting pressure relief gas have become two major problems that mining technology workers need to solve. Controlling the movement of rock formations and extracting pressure relief gas itself are two opposite processes, that is, the former needs to prevent the bending and deformation of the rock formations, while the latter requires the rock formations to be fully decompressed and produce mining cracks before they can b...

Claims

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Application Information

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IPC IPC(8): E21F15/08E21F7/00
CPCE21F7/00E21F15/08
Inventor 许家林李伟轩大洋葛春贵王秉龙倪建明陈家祥
Owner HUABEI MINING GRP
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