Yongcheng Coal Holdings Group Co. , Ltd. , HNEC

为解决陈四楼煤矿大采长工作面高承压水区域底板水害治理难题,在矿井典型2517大采长工作面采用底板注浆改造技术解放受底板太原组灰岩水威胁的煤层。通过资料调研和数据计算,选取改造层位并进行钻孔设计,基于底板注浆改造钻孔的涌水量和注浆量数据,对各含水层富水性、注浆量、主要可注裂隙、不同级别充水裂隙注浆材料消耗及平均单孔耗浆量规律进行对比分析。结果表明,含水层富水区主要受裂隙、断层和褶皱等构造的影响,L10灰岩和L8灰岩含水层富水性强,分布较均匀,连通性较好,其含水层以中小型和大型裂隙为主且中小型裂隙较多;工作面平均单孔耗浆量约是充水裂隙涌水量的3.4倍。3次物探结果显示,底板注浆改造效果显著,基本解决了陈四楼煤矿高承压水工作面底板突水问题,可为其他矿区矿井水害治理提供借鉴。

In order to solve the problem of water disaster control of floor in the high-confined water area in working face with large mining length in Chensilou Coal Mine,the technology of floor grouting transformation was adopted in the typical 2517 working face with large mining length of the mine to liberate the coal seams threatened by the limestone water in the Taiyuan Formation of the floor. Through data investigation and data calculation,the reconstruction horizon was selected and the borehole design was carried out. Based on the data of water yield and grouting volume of the floor grouting reconstruction borehole,the water abundance, grouting volume, main injectable fissures, grouting material consumption of different levels of water filled fissures,and the average slurry consumption of a single hole were compared and analyzed. The results show that the water-rich area of the aquifer is mainly affected by fractures,faults,folds and other structures. Aquifers of L10 limestone and L8 limestone are characterized by highly water-rich,uniform distribution and good connectivity. Their aquifers are mainly medium and small scale and large-scale fractures and dominated by small and medium scale fractures. The average slurry consumption in single hole of the working face is about 3. 4 times of the water yield in water - filled fissure. According to the results of three times of geophysical exploration,the grouting transformation effect of the floor is remarkable,which basically solves the problem of gushing water of the floor in high-confined water working face in Chensilou Coal Mine,and can provide reference for the treatment of mine water disasters in other mining areas.

国家重点研发计划项目(2019YFC1805400);国家自然科学基金面上项目(42172272)

段李宏. 大采长工作面高承压水底板注浆改造技术研究[J]. 矿业安全与环保,2023,50(4):110-115.

DUAN Lihong. Study on grouting transformation technology of high-confined water floor in working face with large mining length[J]. Mining Safety & Environmental Protection,2023,50(4):110-115.