A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention provides a preparation method of a microbial cemented filling material for a coal mine. The preparation method comprises the steps of culture of microorganisms for the coal mine, preparation of a calcium-based chitosan solution, preparation of a urea-calcium-based chitosan solution and preparation of a matrix. A preparation method of the calcium-based chitosan solution comprises heating a 12-15% chitosan-acetic acid solution, carrying out heat preservation, and adding anhydrous calcium chloride until the calcium ion content is 65-90 g/l. According to a preparation method of the matrix, the mass ratio of the coarse aggregate to the fine aggregate is (6-8): (1.4-2.5), and the average specific surface area of the coarse aggregate is 500-1500 m<2>/kg, and the average specific surface area of the fine aggregate is 1500-3000 m<2>/kg. The microbial cemented filling material for coal mine has the advantages of low microbial consumption, high compressive strength, high roof contact rate, small slump and low bleeding rate. The technical problems that an existing microorganism cemented filling material is large in use amount and poor in cemented filling effect are solved.
本发明提供了一种煤矿用微生物胶结充填材料的制备方法，包括煤矿用微生物的培养、钙基壳聚糖溶液的制备、尿素‑钙基壳聚糖溶液的制备、基质的制备；钙基壳聚糖溶液的制备，将12‑15%的壳聚糖‑醋酸溶液加热保温，加入无水氯化钙至钙离子含量为65‑90g/l；所述基质的制备，粗骨料和细骨料质量比为6‑8:1.4‑2.5，粗骨料平均比表面积为500‑1500m/kg；细骨料平均比表面积为1500‑3000m/kg；本发明的煤矿用微生物胶结充填材料，微生物用量少，微生物胶结充填材料抗压强度高，接顶率高，坍落度小，泌水率低；解决了现有的微生物胶结充填材料用量大、胶结充填效果差的技术问题。
The invention provides a preparation method of a microbial cemented filling material for a coal mine. The preparation method comprises the steps of culture of microorganisms for the coal mine, preparation of a calcium-based chitosan solution, preparation of a urea-calcium-based chitosan solution and preparation of a matrix. A preparation method of the calcium-based chitosan solution comprises heating a 12-15% chitosan-acetic acid solution, carrying out heat preservation, and adding anhydrous calcium chloride until the calcium ion content is 65-90 g/l. According to a preparation method of the matrix, the mass ratio of the coarse aggregate to the fine aggregate is (6-8): (1.4-2.5), and the average specific surface area of the coarse aggregate is 500-1500 m<2>/kg, and the average specific surface area of the fine aggregate is 1500-3000 m<2>/kg. The microbial cemented filling material for coal mine has the advantages of low microbial consumption, high compressive strength, high roof contact rate, small slump and low bleeding rate. The technical problems that an existing microorganism cemented filling material is large in use amount and poor in cemented filling effect are solved.
本发明提供了一种煤矿用微生物胶结充填材料的制备方法，包括煤矿用微生物的培养、钙基壳聚糖溶液的制备、尿素‑钙基壳聚糖溶液的制备、基质的制备；钙基壳聚糖溶液的制备，将12‑15%的壳聚糖‑醋酸溶液加热保温，加入无水氯化钙至钙离子含量为65‑90g/l；所述基质的制备，粗骨料和细骨料质量比为6‑8:1.4‑2.5，粗骨料平均比表面积为500‑1500m/kg；细骨料平均比表面积为1500‑3000m/kg；本发明的煤矿用微生物胶结充填材料，微生物用量少，微生物胶结充填材料抗压强度高，接顶率高，坍落度小，泌水率低；解决了现有的微生物胶结充填材料用量大、胶结充填效果差的技术问题。
Microbial cemented filling material for coal mines and preparation method thereof
一种煤矿用微生物胶结充填材料及其制备方法
2020-09-08
Patent
Electronic Resource
Chinese
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