冀宇鑫, 李鹤鹤, 宋高峰.部分充填开采工作面围岩稳定性分析及采充工艺优化[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2022010024

JI Y X, LI H H, SONG G F,.Study on surrounding rock stability of partially filled mining face underthe influence of filling stiffness and filling step[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2022010024

部分充填开采工作面围岩稳定性分析及采充工艺优化（网络首发）

冀宇鑫, 李鹤鹤, 宋高峰

北方工业大学 土木工程学院，北京100144

摘要:为了进一步研究部分充填采煤技术顶板及覆岩移动规律，采用弹性地基梁理论建立顶板 挠度微分方程，明确充填体弹性地基系数以及直接顶弹性模量与顶板下沉的关系，并建立 Phase 2D 有限元数值模型，研究部分充填条件下充填体刚度及充填步距对覆岩稳定性的影响 规律。结果表明：充填区直接顶最终下沉量随充填体弹性地基系数增大而减小；随着顶板弹性 模量增大，工作面范围内直接顶下沉量逐渐减小，而充填区直接顶下沉量没有太大变化；随着 充填体刚度和充填步距增大，工作面前方塑性区、工作区域直接顶下沉量、工作面上方覆岩垂 直位移都随之减小，且在充填步距对围岩稳定性的影响中，高宽比相对于及时支护更为显著。

关键词:部分充填;充填步距;充填体刚度;顶板下沉;围岩稳定性

中图分类号：TD322;TD823

doi:10.16186/j.cnki.1673-9787.2022010024

基金项目:国家自然科学基金资助项目（52004010）

收稿日期:2022-01-08

修回日期:2022-05-23

网络首发日期: 2023-04-13

Study on surrounding rock stability of partially filled mining face underthe influence of filling stiffness and filling step（Online）

JI Yuxin, LI Hehe, SONG Gaofeng

School of Civil Engineering，North China University of Technology，Beijing 100144，China

Abstract:In order to further study the movement law of roof and overburden in partial backfill mining technology ，the equation is developed using the elastic foundation beam theory to reveal the relationship between the filling elastic foundation coefficient as well as the direct roof elastic modulus and the roof subsid- ence，a numerical model is developed using the Phase 2D，which studys and analyzes the overburden movement under different backfill stiffness and different backfill steps.The results show that the final subsidence of the direct roof decreases with the increase of the elastic foundation coefficient of the filling body； with the increase of roof elastic modulus，the direct roof subsidence in the working face decreases gradually， while the direct roof subsidence in the filling area does not change much. With the increase of filling body stiffness and backfill steps，the plastic zone in front of the longwall face，the deflection of direct roof in the working area and the vertical displacement of overburden above the longwall face all decrease accordingly， and in the influence of filling step on the stability of surrounding rock，the height width ratio is more significant than timely support.

Key words:partial backfill;backfill steps;filling body stiffness;direct roof subsidence;surrounding rock stability

CLC：TD322;TD823