王国梁，王飞，王树勇，等.寺河煤矿大采高超宽工作面导水裂隙带发育规律研究［J］.河南理工大学学报（自然科学版），doi:10.16186/j.cnki.1673-9787.2023110011

ZANG J C，LI D H，ZHANG L，et al. Study on the development law of water-conducting fissure zone in large mining height and ultra-wide working face of Sihe coal mine［J］.Journal of Henan Polytechnic University（Natural Science），doi:10.16186/j.cnki.1673-9787.2023110011

寺河煤矿大采高超宽工作面导水裂隙带发育规律研究(网络首发)

王国梁^1.2，王飞³，王树勇²，程凤飞²，杜锋⁴

（1.太原理工大学 继续教育学院，山西 太原 030000；2.晋能控股装备制造集团有限公司寺河煤矿，山西 晋城 048000；3.山西晋煤集团技术研究院有限责任公司，山西 晋城 048000；4.河南理工大学 能源科学与工程学院，河南 焦作 454000）

摘要: [目的] 为了得到寺河煤矿大采高超宽工作面导水裂隙带发育规律，[方法] 以寺河煤矿6306大采高超宽工作面为研究对象，利用并行电法观测采动前后煤层顶板岩层视电阻率变化规律，结合数值模拟结果得到导水裂隙带发育规律。[结果] 结果表明：（1）采动前后煤层顶板岩层视电阻率变化明显，原始地层视电阻率为150~300 Ω•m，严重破坏地层视电阻率可达680 Ω•m，并行电法实测大采高超宽工作面开采垮落带高度为21.0m，垮采比为3.5，导水裂隙带实测高度下限值为82.5 m，裂采比为13.8，未能在观测期间有效捕捉到导水裂隙带上限值；（2）数值计算得出大采高超宽工作面垮落带高度为21.9 m，工作面推进至300m时，导水裂隙带发育至最高，达90.6 m，导水裂隙的最终形态仍然符合“马鞍型”分布特征；（3）由于垮落带发育至最高值所需时间短，并行电法测试过程中，垮落带已充分发育，现场实测与数值计算结果接近；而导水裂隙带发育至最高值所需时间至少需1-2月，现场有效测试时间短，导致现场实测与数值计算结果有较大偏差。[结论] 寺河煤矿大采高超宽工作面导水裂隙带发育高度为82.5m~90.6m，导水裂隙的最终形态为“马鞍型”分布特征，该研究结果对预防寺河煤矿顶板水害及科学抽采采空区瓦斯具有重要的指导意义。

关键词: 导水裂隙带；超宽工作面；并行电法；数值模拟

中图分类号：TD745

doi: 10.16186/j.cnki.1673-9787.2023110011

基金项目: 国家自然科学基金资助项目（52274079，52174073）；河南省高校创新人才工程项目（24HASTIT021）

收稿日期：2023-11-08

修回日期：2024-03-08

网络首发日期：2024-12-12

Study on the development law of water-conducting fissure
zone in large mining height and ultra-wide working face of
Sihe coal mine

WANG Guoliang^1,2, WANG Fei³, WANG Shuyong², CHENG Fengfei², DU Feng⁴

(1. School of Continuing Education Taiyuan University of Technology, Taiyuan 030000, Shanxi, China; 2. Jinneng Holding Equipment Manufacturing Group Co.，Ltd., Sihe Coal Mine， Jincheng 048000, Shanxi, China; 3.Shanxi Jinmei Group Technology Research Institute Co.，Ltd.， Jincheng 048000, Shanxi, China; 4.School of Energy Science and Engineering，Henan Polytechnic University, Jiaozuo 454000, Henan, China)

Abstract: [Objective] In order to obtain the development law of the water diversion fracture zone in the large mining height and ultra-wide working face of Sihe coal mine. [Methods] Taking the 6306 large mining height and ultra-wide working face of Sihe coal mine as the research object, the variation law of apparent resistivity of roof rock of coal seam before and after mining is observed by using parallel electric method. [Results] (1) The change in apparent resistivity of the coal seam roof rock layers before and after mining is significant. The original strata's apparent resistivity is 150~300 Ω•m, and the severely damaged strata can reach 680 Ω•m. The measured height of the caving zone in the large mining height and super-wide working face using parallel electrical method is 21.0m, with a caving ratio of 3.5. The measured lower limit of the water-conducting fracture zone's height is 82.5m, with a fracturing ratio of 13.8. The upper limit of the water-conducting fracture zone was not effectively captured during the observation period; (2) Numerical calculations show that the height of the caving zone in the large mining height and super-wide working face is 21.9m. When the working face advances to 300m, the water-conducting fracture zone develops to its highest at 90.6m, and the final form of the water-conducting fractures still conforms to the 'saddle-shaped' distribution characteristics; (3) Since the caving zone develops to its maximum height in a short time, the parallel electrical method test process, the caving zone has fully developed, and the field measurements are close to the numerical calculation results. However, it takes at least 1-2 months for the water-conducting fracture zone to develop to its maximum height. Due to the short effective testing time on site, there is a significant deviation between the field measurements and the numerical calculation results. [Conclusion] The development height of the water-conducting fracture zone in the large mining height and super-wide working face of the Sihe Coal Mine ranges from 82.5m to 90.6m, and the final form of the water-conducting fractures exhibits 'saddle-shaped' distribution characteristics. These research results have significant implications for preventing water hazards in the roof of the Sihe Coal Mine and for scientifically extracting gas from the mined-out area.

Key words: water conduction fracture zone; extra-wide working surface; parallel electrical method; numerical simulation

CLC: