布尔台矿42201工作面底板砂岩承压水防治技术

发布时间：2018-12-23 13:10

【摘要】：为了解决布尔台矿42201工作面底板砂岩承压水带压开采问题。根据勘探钻孔资料及上部22201工作面开采过程中封闭不良钻孔出水情况,分析了工作面带压开采水文地质条件。通过计算煤层底板采动破坏深度、有效保护层厚度、阻水能力及突水系数,评价了工作面带压开采威胁程度。采取直流电法探测对底板砂岩含水层富水性异常垂向、平面分布范围、特征进行探查,并对重点富水异常区域进行钻探验证及疏水降压。对工作面内钻孔封孔质量进行了评价,预计了工作面开采时封闭不良钻孔的透水量,并对封闭不良钻孔区域的底板砂岩含水层实施疏水降压及注浆改造。经注浆检查孔验证,该区域疏水降压及注浆改造效果较好,可实现工作面安全开采。
[Abstract]:In order to solve the pressure mining problem of bottom slab sandstone bearing water belt in 42201 face of Botai Coal Mine. According to the data of exploration borehole and the situation of sealing bad borehole effluent in the mining process of the upper 22201 working face, the hydrogeological conditions of the mining face with pressure are analyzed. By calculating the mining failure depth of coal seam floor, the thickness of effective protective layer, the water blocking capacity and the water inrush coefficient, the threat degree of mining with pressure in the working face is evaluated. The vertical, plane distribution range and characteristics of water-rich anomaly in bottom sandstone aquifer are detected by direct current method, and the key water-rich anomaly area is drilled and verified and hydrophobic pressure is lowered. The quality of borehole sealing in working face is evaluated, the permeability of bad borehole is predicted, and the hydrophobic pressure reduction and grouting reconstruction of the bottom sandstone aquifer in the region of sealing bad borehole are carried out. It is verified by grouting inspection hole that the hydrophobic pressure reduction and grouting retrofit in this area are better, and safe mining can be realized.
【作者单位】：神华神东煤炭集团有限责任公司;中煤科工集团西安研究院有限公司;
【分类号】：TD745.2

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