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Anchor and extraction integrated method for mining bottom plate rock roadway in deep part coal seam

A technology of coal seam and rock, which is applied in the field of integration of bolting and pumping in rock roadways in deep coal seam mining, can solve problems such as difficult to effectively eliminate high ground stress hazards, inability to timely extract coal seam gas, and easy collapse and deformation of boreholes, etc., to achieve increased Practicality and adaptability, low cost of anchor pumping, and the effect of increasing the tightness of hole sealing

Active Publication Date: 2019-11-15
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the technology of excavation and support first, followed by drainage and drilling is mainly adopted. The main problems of this technology are that the support technology and the drainage technology are independent of each other. The overall construction period is long, and it is difficult to effectively eliminate the hazards of high ground stress, and the coal cannot be extracted in time. Layers of gas, borehole collapse and deformation, serious closure, and poor drainage channels, etc., especially in deep mining, these problems will become more serious

Method used

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  • Anchor and extraction integrated method for mining bottom plate rock roadway in deep part coal seam
  • Anchor and extraction integrated method for mining bottom plate rock roadway in deep part coal seam
  • Anchor and extraction integrated method for mining bottom plate rock roadway in deep part coal seam

Examples

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Effect test

Embodiment 1

[0041] Such as Figure 1-Figure 3 As shown, the integrated method of bolting and pumping for rock roadway in deep coal seam mining includes the following steps:

[0042] (1) Drilling: use a conventional drilling rig to drill in the rock roadway 1, and drill a plurality of boreholes 2;

[0043] (2) Select a suitable integrated anchor-pump device according to the three indicators of coal seam burial depth, coal seam gas content, and rock mass integrity, and insert the selected anchor-pump integrated device into the borehole 2 to integrate the anchor-pump pump The extraction section of the device is located in the coal seam 3, and the anchoring section of the integrated anchor-pumping device is located in the rock layer 4;

[0044] (3) Anchoring the anchor-pumping integrated device in the borehole 2;

[0045] (4) Connect the anchor-pumping integrated device to the gas drainage pipeline in the rock roadway 1 for gas drainage.

[0046] The integrated anchor and pumping device of...

Embodiment 2

[0053] Such as Figure 4-Figure 7 As shown, the difference from Example 1 is that the anchor-pumping integrated device of this embodiment is a hollow grouting type anchor-pumping integrated device, and the hollow grouting type anchor-pumping integrated device includes a hollow anchor body 5, a extraction flower pipe 6. A number of centralizers 7, steel expansion shell anchor heads 13, hole sealing components, anchor discs 8 and nuts 9, with the end of the hollow anchor body 5 extending into the borehole 2 as the front end, and the hollow anchor body 5 It is composed of several short hollow anchor rods connected with coaxial threads, and the drainage flower pipe 6 is composed of several short flower pipes connected with coaxial threads. 5, the steel expansion shell anchor head 13 has a conical shell structure with a thin front and a thick rear end and an open rear end. The steel expansion shell anchor head 13 is fixed and fixed on the outer circumference of the front side of th...

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Abstract

The invention discloses an anchor and extraction integrated method for mining a bottom plate rock roadway in a deep part coal seam. The anchor and extraction integrated method includes the following steps that (1) drilling is conducted, specifically, a conventional drilling machine is used for drilling in the rock roadway, and a plurality of drilling holes are drilled; (2) anchor and extraction integrated devices are inserted into the drilling holes, extraction sections of the anchor and extraction integrated devices are located in the coal seam, and anchorage sections of the anchor and extraction integrated device are located in lithosphere; (3) the anchor and extraction integrated devices are anchored in the drilling holes; and (4) the anchor and extraction integrated devices are connected with extraction pipelines of a gas extraction system in the rock roadway for conducting gas extraction. The anchor and extraction integrated method has the advantages of being simple in structure,convenient to operate, high in reliability and low in anchor extraction cost.

Description

technical field [0001] The invention relates to the technical field of roadway anchoring and coal seam gas drainage, in particular to an integrated anchoring and pumping method for deep coal seam mining floor rock roadways. Background technique [0002] With the increase of coal mining depth and intensity, the risk of coal and gas outburst (hereinafter referred to as "outburst") increases, and the difficulty of outburst prevention technology increases. Different from the shallow part, such as the complexity and diversity of the stress field evolution of the surrounding rock, the large deformation and strong rheological characteristics of the surrounding rock, the brittle-ductile transformation of the deep coal and rock mass, and the sudden change of the dynamic response, etc.; Complex, deep in-situ stress-dominated coal roadway outburst is more prominent. [0003] At present, there is no protection layer for mining in a single outburst coal seam, and outburst prevention mea...

Claims

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Application Information

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IPC IPC(8): E21D21/00E21D20/00E21F7/00E21B17/00E21B17/10E21B17/042E21B33/127
CPCE21B17/00E21B17/042E21B17/1078E21B33/127E21D20/003E21D21/0026E21F7/00
Inventor 刘晓荆天祥倪小明韩颖李定启蔺海晓李勇邢宝林
Owner HENAN POLYTECHNIC UNIV
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