Delayed expansion type composite drilling sealing material

A sealing material and delayed expansion technology, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of high cost, limited hole sealing depth of hole sealer, complicated polyurethane hole sealing operation, etc., and achieve strong fluidity Effect

Inactive Publication Date: 2019-12-31
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used sealing technologies for gas drainage in my country include cement mortar sealing, polyurethane sealing, and hole sealing device sealing, etc. Among them, the cement mortar sealing material loses water and

Method used

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Effect test

Embodiment 1

[0045] Embodiment 1: The delayed expansion type composite drilling sealing material provided by the present invention includes microcapsule expansion agent, high dispersion cement and polymer mixture, and according to the mass ratio, the required microcapsule expansion agent components are respectively sodium alginate 2%, gelatin 2%, expansion agent 4%, water 92%; the required high dispersion cement components are Portland cement 66%, water 33%, dispersant 1%; the required polymer mixture components They are 49%, curing agent 49%, and coupling agent 2%.

[0046] The preparation steps of the delayed expansion type composite drilling sealing material are as follows:

[0047] a. Get gelatin, sodium alginate, water, and expansion agent in proportion, and mix them to make microcapsule expansion agent for subsequent use;

[0048] b. Take Portland cement, water, and dispersant in proportion, and mix them to make high-dispersion cement for later use;

[0049] c. Take the resin, curi...

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PUM

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Abstract

The invention discloses a delayed expansion type composite drilling sealing material, which comprises a microcapsule expanding agent, high-dispersity cement and a polymer mixture. Specifically, the microcapsule expanding agent comprises the following substances by mass: 2% of sodium alginate, 2% of gelatin, 4% of an expanding agent and 92% of water; the high-dispersity cement comprises the following substances by mass: 66% of Portland cement, 33% of water and 1% of a dispersing agent; and the polymer mixture comprises the following substances by mass: 49% of resin, 49% of a curing agent, and 2% of a coupling agent. The microcapsule expanding agent, the high-dispersity cement and the polymer mixture are mixed in a mass ratio of 0.02:1:0.06 to obtain the delayed expansion type composite drilling sealing material. The delayed expansion type composite drilling sealing material provided by the invention can permeate into fissures around hole walls under a grouting pressure, the polymer mixture improves the compactness, impermeability and mechanical strength of the sealing material, the microcapsule expanding agent delays the onset time of the expanding agent, and lowers the influence ofthe expanding agent on the compactness of the material, thus realizing expansion-strength coordinated development.

Description

technical field [0001] The invention designs a delayed-expansion composite drilling sealing material, in particular a method for preparing and using a delayed-expansion composite drilling sealing material, and belongs to the technical field of coal seam gas control. [0002] technical background [0003] my country's coal mining is dominated by underground mining. The coal seam occurrence conditions are complex and changeable, coal disasters are frequent, and gas accidents are particularly serious. Gas drainage is the basic control method for coal mine gas control. The quality of borehole sealing determines the effect of gas drainage. strength. [0004] At present, the commonly used sealing technologies for gas drainage in my country include cement mortar sealing, polyurethane sealing, and hole sealing device sealing, etc. Among them, the cement mortar sealing material loses water and shrinks during the solidification process, leaving pores; the polyurethane sealing operation ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C09K8/467
CPCC04B28/04C09K8/467C04B2111/70C04B24/287C04B2103/408C04B24/38C04B24/42C04B24/281C04B22/04
Inventor 倪冠华董凯程卫民徐宇航王刚刘震孙路路刘义鑫
Owner SHANDONG UNIV OF SCI & TECH
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