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郑煤集团告成煤矿南翼副立井,井筒设计746 m,二1煤层底板太原群下段L1-4灰岩富水性强,水压大,严重影响井筒安全落底。为保证井筒安全落底,在充分分析该区域水文地质条件的基础上,对浆液、浆液扩撒半径以及根据岩溶裂隙发育程度,计算注浆孔个数,对L1-4灰岩段进行超前预注浆加固。物探结果表明,注浆对L1-4灰岩段改造效果理想,该成果对高水压类似井筒水害防治有一定的参考价值和指导意义。
Zheng Coal Group reported to the south wing of the coal mine deputy shaft, wellbore design 746 m, the second floor of the Taiyuan Group II1 coal seams L1-4 limestone strong water-rich, large water pressure, seriously affecting the wellbore safety at the end. Based on the full analysis of the hydrogeological conditions in this area, the number of grouting holes is calculated based on the radius of grout and slurry spreading and the degree of development of karst fractures. Grouting reinforcement. The results of geophysical prospecting show that the grouting has an ideal reformation effect on the L1-4 limestone section, and the results have certain reference value and guiding significance for prevention and control of water damage in similar high-pressure wellbores.