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| Research and application of grouting water plugging technology of vertical well shaft in Liangbei No.2 Well |
| Rao xin |
| Henan Pingmei Shenma Liangbei No.2 Well Coal Industry Co., Ltd., Xuchang 461694, China |
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Abstract In order to reduce the water yield of the shaft and ensure the construction safety, the research on grouting water plugging technology was carried out in the construction of the main and auxiliary shafts of Liangbei No.2 Well. On the basis of analyzing the existing problems, the overall control scheme of ' curtain pre grouting + wall grouting ' was put forward. The thickness of the rock cap was calculated, the grouting section and the layout of grouting hole was determined, and the grouting parameters and process were determined according to the site conditions. After the application of this technology, the wellbore was bottomed 100 days in advance, which saved water plugging cost of 5 million yuan, and the economic and social benefits were remarkable. The technology provided a reference for control of wellbore water plugging under similar conditions.
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