School of Mines, China University of Mining and Technology
Shaanxi Yulin Energy Group Co. , Ltd.

由于技术装备问题导致前期一些矿井的特厚煤层开采仅限厚开采造成了大量优质煤炭资源的浪费,本研究基于榆树湾煤矿20111限厚开采工作面,综合运用现场实测,UDEC数值模拟、实验室试验、理论分析研究了特厚煤层工作面限厚与充填协同分层开采覆岩导水裂隙发育规律。数值模拟表明,当下分层充填开采充实率达到70%及以上时,导水裂隙带发育高度为177.4m,下分层开采对第四系萨拉乌苏组含水层无影响;下分层70%充实率充填开采物理模型相互验试验表明,下分层70%充实率充填开采时,覆岩裂隙发育明显减缓,导水裂隙带发育高度明显降低,仅为179.7m,导水裂隙带未发育至最小隔水保护层,可实现第四系萨拉乌苏组含水层下的特厚煤层安全、高效开采。

In the early stage of coal development, due to the technical equipment issues, some mines limited their thick coal seam mining to a portion, leaving a large amount of idle high-quality coal resources. Based on the engineering background of the thick coal seam mining face in Yushuwan Coal Mine, we comprehensively used on - site measurement, UDEC numerical simulation, laboratory experiments, and theoretical analysis to study the development law of overlying rock water conducted fractures in the thick coal seam mining face of collaborative slicing mining with thickness limit and filling. Numerical simulation shows that, when the filling rate of the lower slicing filling mining reaches 70% or above, the development height of the water conducted zone is 177. 4 m, and the lower slicing mining has no impact on the Quaternary Salawusu Formation aquifer; The physical model cross validation test of the lower slicing 70% filling mining shows that, in this condition, the development of overlying rock fractures slows down significantly, and the height of the development of the water conducted zone greatly declines to 179. 7 m. The water conducted zone has not developed to the minimum waterproof protective layer, which indicates the extra-thick coal seam can be mined safely and efficiently under the Quaternary Salawusu Formation aquifer.

陈海富,范立民,李小龙,等.特厚煤层限厚与充填协同分层开采覆岩导水裂隙发育规律研究[J].煤炭工程,2024,56(5):129-137.