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Spaced arrangement gangue filling and bag grouting combined support loss reduction method

A grouting and bagging technology, which is used in fillings, mining equipment, earthwork drilling, etc., can solve the problems of reducing the amount of grouting in goafs and lifting of gangue, so as to reduce the risk of groundwater pollution, reduce waste and construction. convenient effect

Inactive Publication Date: 2020-08-18
XIAN UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

At the same time, on the one hand, this method makes full use of broken gangue interval grouting reinforcement to reduce the amount of grouting in the goaf, which not only solves the problem of a large number of gangue upwelling and pollution, but also meets the demand for filling materials; Grouting filling solves the problem of contact between gangue cemented pile piles and roof

Method used

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  • Spaced arrangement gangue filling and bag grouting combined support loss reduction method
  • Spaced arrangement gangue filling and bag grouting combined support loss reduction method
  • Spaced arrangement gangue filling and bag grouting combined support loss reduction method

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Embodiment Construction

[0035] 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.

[0036] 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.

[0037] 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 arrangement gangue filling and bag grouting combined support loss reduction method. The method is suitable for thin and medium-thickness coal seams with hard top plates in mining areas with more gangues in middle and west. The method is characterized in that gangue is piled by adopting a hydraulic support rear gangue throwing device, interval type cemented gangue and bag combined support is arranged in the coal mining operation, the top plates are in a cantilever beam state, before the top plates are broken and collapsed, the broken gangue is thrown and accumulated to a reserved supporting point through a gangue throwing machine by means of a working gap of temporary supporting of a hydraulic support, and after the broken gangue is grouted and glued to a certain strength, grouting bags are arranged for grouting supporting; and meanwhile, the grouting process is controlled through the initial setting time and the grouting pressure of the cement paste, the construction quality is guaranteed, and therefore, the supporting means can meet the environmental protection requirement and the technical requirement of green mining.

Description

technical field [0001] The invention relates to a joint supporting and reducing method for gangue filling and bag grouting arranged at intervals, and relates to the technical field of coal mining. Background technique [0002] With the transfer of coal mining to the western region in recent years, it has led to the deterioration of the environment in the western region and exacerbated the destruction of the western ecology. Especially in the ecologically fragile areas in the west, drought and little rain, lack of water resources, and fragile ecological environment make the contradiction between large-scale mining of coal resources and ecological environment protection very prominent. Coal mining activities cause fractures and subsidence of the overlying strata of the coal seam, resulting in problems such as surface subsidence, subsidence and cracking, which cause changes in the original geological conditions, damage to the surface ecological environment, damage to infrastruc...

Claims

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Application Information

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IPC IPC(8): E21F15/00E21F15/06
CPCE21F15/005E21F15/06
Inventor 申艳军郝建帅白志鹏侯新袁江强
Owner XIAN UNIV OF SCI & TECH
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