High-water-retention mine filling material
A mine filling and cement technology, applied in the field of coal mining, can solve the problems of lower final strength, short initial setting time, easy pipe plugging, etc., and achieve the effect of waste utilization, long initial setting time and high final setting strength
Inactive Publication Date: 2017-06-27
谢松甫
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Problems solved by technology
However, the initial setting time is only 1.5 to 2 hours, which is not conducive to the pre-preparation of filling materials. It needs to be prepared immediately during use, and there is no sufficient preparation time.
In addition, multiple mixing equipments are required to work at the same time during the preparation, which requires more manpower; the short initial setting time and high expansion rate cause easy plugging of the pipe and reduce the final strength
Method used
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Embodiment 1-4
[0015] Example 1-4 Filling materials for mines with high water retention
[0016] This embodiment is respectively a high water retention mine filling material, and the specific ingredients are shown in the following table.
[0017]
[0018] The preparation methods of Examples 1-5 are as follows:
[0019] In the mixing equipment, first add water, then add high-calcium fly ash, continue to stir evenly, add the remaining materials at the same time, and stir for 15 minutes to get it.
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Abstract
The invention discloses a high-water-retention mine filling material which is a compound prepared from high-calcium pulverized fuel ash, gypsum, cement, sodium polyacrylate and a foaming agent. The high-water-retention mine filling material is low in cost, convenient to prepare, high in flow rate, easy to convey, has expansibility, facilitates top joint, can achieve self flowing and active pressure exertion for top joint and gob area filling and has a certain pressure-resistant strength. The high-water-retention mine filling material is suitable for usage after mining.
Description
Technical field [0001] The invention belongs to the technical field of coal mining, and specifically relates to a high water retention mine filling material. Background technique [0002] At present, in the prior art, the filling materials used in coal mining by the filling method mainly include coal gangue, water sand, and paste materials. The more mature paste materials are the paste materials, but the paste filling materials are not only costly, but also due to paste materials. The slurry has poor fluidity, which increases the difficulty of transportation. The use of coal gangue and water sand as a filler has disadvantages such as high labor intensity and high operating cost. The current research and development directions for new filling materials are high-water materials (generally above 55% moisture content), ultra-high-water materials (water content above 90%), and ultra-high-water materials are still in the research stage and there is no public formula. [0003] Chinese p...
Claims
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IPC IPC(8): C04B28/00C04B38/02C04B111/40
CPCC04B28/00C04B2111/00724C04B2111/40C04B22/143C04B18/08C04B24/2641C04B22/04C04B38/02
Inventor 谢松甫
Owner 谢松甫
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