采矿与安全工程学报2018，Vol.35Issue(1)：19-26,8.DOI:10.13545/j.cnki.jmse.2018.01.003
高应力综放面区段煤柱合理宽度与控制技术
Reasonable segment pillar width and its control technology for fully mechanized top-coal caving face with high stress
摘要
Abstract
To address challenges which are serious deformations of the roadway surrounding rock in the fully mechanized top-coal caving mining face, comprehensive methods include theoretical analysis, numerical simulation and field test were used to analyze the problem of segment pillar design and con-trol in ZF201 working face of Jiangjiahe coal mine. The results indicate that the stability of coal pillar is mainly affected by the basic roof fracture and the multi-mining induced effects. With the increase of coal pillar width, the stress concentration area is transferred from the solid coal to the middle pillar and the plastic zone developing from the two sides into the central section with a "X" penetration trend. Considering the roadway stability and safe and efficient mining, the reasonable coal pillar width was optimized to be 18 m. With the application of resin-length bolts and cables reinforcing combined sup-port system, the field monitoring indicated that the coal pillar bear an asymmetrical "double-peak" type stress distribution and a good control effect for the roadway surrounding rock was achieved. The re-search results have been successfully applied in field practices, which provide a beneficial model for roadway layout with similar conditions.关键词
高应力/区段煤柱/合理宽度/组合支护/围岩控制Key words
high stress/segment pillar/reasonable width/combined support/surrounding rock control分类
矿业与冶金引用本文复制引用
赵宾,王方田,梁宁宁,王文林..高应力综放面区段煤柱合理宽度与控制技术[J].采矿与安全工程学报,2018,35(1):19-26,8.基金项目
中央高校基本科研业务费项目(2015XKMS002) （2015XKMS002）
煤炭开采水资源保护与利用国家重点实验室开放基金项目(SHJT-16-30.13) （SHJT-16-30.13）
江苏省优势学科项目 （）
