采矿与安全工程学报2017，Vol.34Issue(2)：221-227,7.DOI:10.13545/j.cnki.jmse.2017.02.004
综放巷内预充填无煤柱掘巷围岩变形特征与控制
Deformation characteristics and control of the surrounding rock in roadways with pre-backfill instead of the pillar in fully mechanized working faces
摘要
Abstract
The technology of pre-backfill instead of the pillar in roadways is based on pre-building backfill body next to the non-cut coal side in the lane of upper working face, the roadway of the nearby working face is driven near to backfill body, and in this way mining without coal pillar is realized. Nu-merical simulation was done with FLAC3D for the deformation and failure characteristics of surrounding rock of roadways with pre-backfill instead of the pillar in top caving working faces. The results have shown that the deformation of roadway is heterogeneous, which further unstably partitions the sur-rounding rock of roadways: shallow roof of the roadway is defined as "tension failure zone", the strati-fication between the immediate roof and the basic roof as well as top coal "shear gliding separation zone", the backfill side shoulder "compression-shear falling zone", and the coal side "compres-sion-shear zone with high stress". Based on the above analysis, the system of non-symmetrical support-ing for different zones is put forward, i.e., with high strength and high pretension yieldable bolt and in-clined anchor as the supporting body, and the anchor is made shift entirely to the backfill body for coor-dinated deformation of the roadways. The technology was applied to the Changcun Coal Mine of Lu'an Group, and could effectively control the deformation of surrounding rock.关键词
无煤柱掘巷/巷内预充填/围岩变形特征/分区非匀称支护Key words
roadway driven without coal pillar/pre-backfill in roadways/deformation characteristics of surrounding rock/non-symmetrical supporting aiming different zones分类
矿业与冶金引用本文复制引用
吴锐,徐金海,赵奎,李海港..综放巷内预充填无煤柱掘巷围岩变形特征与控制[J].采矿与安全工程学报,2017,34(2):221-227,7.基金项目
国家自然科学基金项目(51604126,51664018,51364012) （51604126,51664018,51364012）
江西省科技支撑计划项目(20143ACG70010) （20143ACG70010）
江西省教育厅青年基金项目(3204704054) （3204704054）
江西理工大学博士启动基金项目(jxxjbs15003) （jxxjbs15003）
