【摘要】 为了掌握综放工作面停采后超前支承压力分布及影响范围,分析研究既能满足巷道维护需要,又尽可能地减小煤柱损失的停采线煤柱宽度,通过在综采放顶煤工作面中间回风巷布置应力观测区和煤体松动范围观测区,动态监测煤柱内应力变化,同时进行了巷道围岩松动范围观测。结果表明:停采线煤柱应力测试中,最大应力读数为3.90 MPa,最小2.50 MPa,煤柱内50~170 m范围内受超前压力影响较小;停采线煤柱可减少到160 m。更多还原

【Abstract】 In order to master the abutment pressure distribution and its influence scope of the fully mechanized caving face stop line,we analyze a reasonable coal pillar width which both can meet the needs of roadway maintenance and reduce the loss of coal pillar as much as possible. We dynamically monitor the stress changes of coal pillar and roadway surrounding rock loose range through arranging stress and the coal body loose scope observation areas at fully mechanized caving face return air lane. The results show that the maximum stress readings is 3. 90 MPa and minimum is 2. 50 MPa,which suggest that the coal pillar width within 50 m to 170 m is reasonable by abutment pressure,and the coal pillar width of stopping line could be reduced to 160 m.更多还原