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Spaced overlying strata broken expansion filling reinforcement cage bag grouting loss reduction method

A technology of steel cages and bladders, which is applied in the direction of filling, earthwork drilling, safety devices, etc., can solve the problems of unresolved, secondary settlement, etc., and achieve the effects of reducing waste, saving costs, and avoiding damage

Inactive Publication Date: 2020-09-01
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, for the traditional top-cutting and pressure-relief goaf caving full-section filling method, when using the goaf caving and bulging filling method, it is rare to use broken gangue combined with steel cage bags for interval grouting In addition, for the traditional grouting construction method, the method of drilling down from the surface is generally used to carry out the full-section grouting method in the goaf, and there is no research on the use of underground directional The joint support technology of drilling combined with spaced grouting of steel cage bags does not solve the problem of secondary settlement caused by overlying rock compaction

Method used

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  • Spaced overlying strata broken expansion filling reinforcement cage bag grouting loss reduction method
  • Spaced overlying strata broken expansion filling reinforcement cage bag grouting loss reduction method
  • Spaced overlying strata broken expansion filling reinforcement cage bag grouting loss reduction method

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[0036] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0037] Any feature disclosed in this specification (including any appended claims, abstract), unless otherwise stated, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe the present invention and simplify the description, but not to indicate or imply that the device or element referred to must have a specific orientation, be cons...

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Abstract

The invention discloses a spaced overlying strata broken expansion filling reinforcement cage bag grouting loss reduction method, and aims to solve the problem that a goaf is not completely filled with broken bodies formed by natural caving of a top plate. During the coal mining operation, the effect of temporarily supporting a top plate by using a hydraulic bracket is utilized, and at the moment,spaced reinforcement cage bag supports are arranged before the goaf top plate is collapsed, and grouting is carried out; controlling the grouting process by utilizing the initial setting time of theslurry and combining a grouting pressure gauge and a flowmeter which are arranged on a grouting pipeline; and after the goaf collapses, the directional drilling technology is used for conducting jet grouting on broken overlying strata collapsed on the upper portion of the reinforcement cage grouting bag, a composite supporting structure is formed to stably support the roof overlying strata, and collapse and subsidence of an upper rock stratum are effectively prevented.

Description

technical field [0001] The invention relates to a grouting reduction method for spaced overlying rock broken and swollen filled reinforced cage bags, and relates to the technical field of coal mining. Background technique [0002] my country is the world's largest consumer of coal resources, but also the largest coal producer. This is due to my country's unique mineral production conditions. In the foreseeable future, my country will still occupy the world's coal resource consumption and production. leading position. In recent years, the depth of coal mining has become deeper and deeper, and various problems have become more prominent, such as gangue accumulation, surface subsidence, etc., and there are fewer and fewer large-scale high-quality coal mines. At the same time, various accidents have occurred frequently in the process of coal seam mining. It affects my country's coal production, and also has a serious impact on the life safety of coal production personnel. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/02E21F15/00E21F15/06
CPCE21F15/005E21F15/02E21F15/06
Inventor 申艳军白志鹏侯新郝建帅袁江强
Owner XIAN UNIV OF SCI & TECH
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