考虑煤岩材料非均匀性的特大采高工作面周期来压分析  

Analysis on the Periodic Pressure at the Working Face with Super-Large Mining Height Considering the Heterogeneity of Coal and Rock Materials

作　　者：孙秋迪 杨小彬[1] 吕嘉琦 唐娟 张立辉[3] SUN Qiudi;YANG Xiaobin;LYU Jiaqi;TANG Juan;ZHANG Lihui(School of Emergency Management and Safety Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China;China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400039,China;Shangwan Coal Mine,Shenhua Shendong Coal Group,Ejin Horo Banner,Inner Mongolia 017209,China)

机构地区：[1]中国矿业大学(北京)应急管理与安全工程学院,北京100083 [2]中煤科工集团重庆研究院有限公司,重庆400039 [3]神华神东煤炭集团上湾矿,内蒙古伊金霍洛旗017209

出　　处：《矿业研究与开发》2022年第5期122-126,共5页Mining Research and Development

基　　金：国家自然科学基金面上项目(51774048)。

摘　　要：考虑煤岩材料的非均匀特性对特大采高工作面矿压显现规律的影响,采用理论分析、数值模拟和现场实测相结合的研究方法,研究神东矿区某8m特大采高工作面周期来压规律。提出煤岩微结构密度参数,理论推导工作面非均质顶板周期垮落步距计算公式;建立非均质煤岩体工作面推进数值计算模型,结合现场实测结果验证理论模型和数值计算结果的合理性。结果表明:考虑煤岩材料非均匀特性,周期垮落步距随煤岩微结构密度参数增大呈近似线性减小;周期来压过程,8 m采高工作面垮落步距约为15 m,与现场矿压监测结果较为吻合。研究成果对于掌握神东矿区8 m特大采高综采工作面周期来压规律和保障特大采高综采工作面的安全开采具有重要参考意义。Considering the influence of heterogeneity of coal and rock material on the behavior law of mining pressure in the working face with super-large mining height,periodic pressure law at a working face with 8 m super-large mining height in Shendong mining area was studied by theoretical analysis,numerical simulation and field measurement.The microstructure density parameter of coal rock was proposed,and the calculation formula for the periodic caving step distance of heterogeneous roof at the working face was deduced.The numerical calculation model of heterogeneous coal and rock working face was established.Combined with the field measured results,the rationality of the theoretical model and numerical calculation results were verified.The results show that considering heterogeneity of coal and rock material,the periodic caving step distance decreases linearly with the increase of the rock microstructure density.In the process of periodic pressure,the caving step distance of the working face with 8 m height is 15 m,which is consistent with the mine pressure monitoring results.This study has an important reference significance for grasping the periodic pressure law of the fully mechanized mining face with 8 m super-large mining height in Shendong mining area and ensuring the safe mining of the fully mechanized mining face.

关 键 词：特大采高工作面 非均质岩层 周期垮落 垮落步距 数值模拟 

分 类 号：TD323[矿业工程—矿井建设]