沙吉海矿高强度开采软弱覆岩“两带”高度三维模拟研究  

Three-dimensional simulation of soft overburden"two-zone"height due to high-intensity mining in Shajihai Coal Mine

作　　者：张刚艳[1,2] 于秋鸽 赵高博 ZHANG Gangyan;YU Qiuge;ZHAO Gaobo(China Coal Research Institute,Beijing 100013,China;CCTEG Coal Mining Research Institute,Beijing 100013,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]煤炭科学研究总院,北京100013 [2]中煤科工开采研究院有限公司,北京100013 [3]河南理工大学能源科学与工程学院,河南焦作454003

出　　处：《采矿与岩层控制工程学报》2021年第2期19-26,共8页Journal of Mining and Strata Control Engineering

基　　金：国家自然科学基金资助项目(51874177);天地科技开采设计事业部青年基金资助项目(KJ-2021-KCQN-03);天地科技股份有限公司科技创新创业资金资助项目(2019-TD-MS004)。

摘　　要：为研究沙吉海煤矿高强度开采软弱覆岩"两带"高度,以该矿某高强度开采软弱覆岩工作面为原型建立了三维离散元数值模型,该模型考虑了最大、最小水平主应力及其与工作面推进方向夹角,并基于现场钻孔实测数据对数值模型及岩性参数的合理性进行了校核,分析了不同采厚、工作面倾向长度、走向长度与推进速度对沙吉海矿高强度开采软弱覆岩"两带"最大高度的影响。研究结果表明:该矿高强度开采软弱覆岩"两带"最大高度随采厚的增加而增加,但与工作面的倾向长度、推进速度没有明显关系;高强度开采软弱覆岩工作面达到"两带"最大高度时所需的工作面推进距离与采厚成正相关关系,与倾向长度、推进速度成负相关关系。In order to study the"two-zone"height of soft overburden rock in high-intensity mining in Shajihai Coal Mine,a 3DEC three-dimensional numerical model was established based on a high-intensity mining face.The maximum and minimum horizontal principal stresses and the angle between them and the advancing direction of the working face were considered in the model.The numerical model was calibrated against the field measured data.The influence of mining height,dip length,strike length and mining rate on the maximum height of soft overburden"two-zone"in high-intensity mining was evaluated.The numerical results show that the maximum height of soft overburden"two-zone"in the high-intensity mining has a positive correlation with the mining height,and has no obvious correlation with the dip length and advancing rate of the high-intensity mining face.The advancing distance of working face where the high-intensity mining face reaches the maximum height of overburden"two-zone"has a positive correlation with the mining height,and a negative correlation with the dip length and the advancing rate.

关 键 词：高强度开采 软弱覆岩 “两带”高度 数值模拟 3DEC 

分 类 号：TD82[矿业工程—煤矿开采]