摘要
针对传统巷旁支护存在支护阻力、可缩性等力学性能与沿空留巷围岩变形不相适应问题,致使充填体密闭性能差,施工机械化程度低的问题,在分析风力充填留巷、高水材料充填留巷、端头钢模板支架及泵充填留巷和柔模混凝土充填留巷的基础上,对4种留巷方式的设备配置及运行情况进行了评价。最终确定榆家梁煤矿快速沿空留巷选用柔模混凝土充填留巷方式,实现了地面混凝土干拌及井下混凝土上料、加水搅拌与泵送的连续作业,研究表明该套设备符合神东矿区快速沿空留巷的要求,充填速度可达20 m/班,充填体抗压强度可达25 MPa。
According to the inadequate, poor leakproofness performances and low mechanization degree problems between the support re- sistance, yielding and other mechanics performances existed in the conventional sidewall support of the gateway and the surrounding rock deformation of the gob-side entry retaining, based on the analysis on the pneumatic backfill gateway retained, high water material backfill gateway retained, face end steel module support and pumping backfill gateway retained and concrete backfill gateway retained with the flex- ible module, an evaluation was conducted on the equipment allocation and operation conditions of four gateway retained methods.Finally, a flexible module concrete preparation and conveyor unit was selected for the rapid gob-side entry retaining in Yujialiang Mine.A surface concrete dry mixing and a concrete feeding in underground mine, mixing with water and continued pumping operation could be realized.The study showed that the set equipment could meet the requirements of the rapid gob-side entry retaining in Shendong Mining Area, the back- fill speed could be reached to 20 m/shift and the compressive strength of the backfill mass could be reached to 25 MPa.
出处
《煤炭科学技术》
CAS
北大核心
2014年第1期129-133,共5页
Coal Science and Technology
基金
国家高技术研究发展计划(863计划)资助项目(2012AA062203)
关键词
沿空留巷
巷旁支护
柔模混凝土充填
围岩稳定性
gob-side entry retaining
side support of gateway
concrete backfill with flexible module
stability of surrounding rock
