采矿与安全工程学报2016，Vol.33Issue(4)：585-591,7.DOI:10.13545/j.cnki.jmse.2016.04.003
膏体置换煤柱充填体承载特性及工作面支护强度研究
Bearing characteristics of filling body and supporting intensity of working face during coal pillar mined with paste backfill
摘要
Abstract
Taking paste backfill working face 2351 for an example in Daizhuang coal mine, bearing characteristics of filling body and supporting intensity of working face during coal pillar mined with paste backfill have been studied. Based on the analysis of the motion characteristics of roof in coal pillar mined with paste backfill, the mechanical model of roof stability during coal pillar mined with paste backfill has been established, and the mechanics related formula of supporting intensity has also been concluded. Research has shown that: the strength of paste is high, elastic modulus and Poisson’s ratio are lower, the discreteness of mechanical properties is obvious, and that the paste has typical plasticity hardening features; The overlying strata of paste backfill working face has breaks, bed separation and bending zone rather than caving zone; The distribution of vertical stress above the filling body is not a horizontal line nor saddle-shaped as the strip coal pillar but presents wave distribution. The stress above the filling body is not mutational but tends to be increasing and stable at last. The hydraulic supports used in paste backfill face 2351 can control the roof subsidence effectively, but the efficiency of hydrau-lic supports is lower, which should be optimized properly.关键词
条带煤柱/膏体置换开采/充填体承载特性/工作面支护强度Key words
strip coal pillar/paste backfill mining/bearing characteristics of filling body/supporting intensity of working face分类
矿业与冶金引用本文复制引用
郭惟嘉,江宁,王海龙,陈绍杰..膏体置换煤柱充填体承载特性及工作面支护强度研究[J].采矿与安全工程学报,2016,33(4):585-591,7.基金项目
国家自然科学基金项目(51274132，U1361105)；教育部博士点基金项目(20133718110001)；山东省自然科学基金重点项目(ZR2013EEZ001) （51274132，U1361105）
