摘要
为研究深部软岩巷道强烈底鼓发生机理及治理方法,以邯矿集团陶二煤矿扩大区南大巷底鼓问题为背景,分析了南大巷强烈底鼓特征及影响因素,提出了巷道底板锚索束+底板深浅注浆的治理方案,通过巷道原支护和底鼓治理方案相似模拟试验,对比分析了两方案在底板破坏和围岩应力分布特征。结果表明:高应力、岩石遇水膨胀、支护结构不合理等因素综合作用导致巷道发生强烈底鼓;浅部注浆使底板破碎岩体相互黏结形成整体,深部注浆填充深部裂隙岩体孔隙,锚索束将浅部注浆岩体和深部注浆岩体锚固在一起限制底板变形。现场底鼓治理试验表明:巷道底板变形在38~48 mm之间,治理后30 d巷道趋于稳定。该底鼓治理技术适用于深部大断面、永久巷道(硐室)底板加固。
In order to research on mechanism and controlling method of strong floor heave in deep soft rock roadway, with the floor heave of southern main roadway in Handan MIG Tao＇er coal mine expansion area as the engineering background, the characteristics and influence factors of strong floor heave in south main roadway were analyzed, the treatment scheme of cable beam ＋ floor grouting was put forward, and the characteristics of floor failure and stress distribution for the two schemes were compared and analyzed through similar simulation test of original roadway support and floor heave treat-ment scheme. The results have shown that the factors of strong floor heave include high stress, rock water swelling, and unreasonable supporting structure; shallow floor grouting makes the broken rock mutual cohere and form a whole rock, deep floor grouting fills the deep fractured rock pores, and cable beams anchor the shallow grouting rock mass and the deep grouting rock mass together to limit the floor deformation. The field test has shown that floor deformation is between 38-48 mm, and roadway defor- mation tends to be stable 30 days after the treatment. The treatment technology of floor heave is suitable for floor reinforcement of deep large section roadway and permanent roadway.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2017年第2期235-242,共8页
Journal of Mining & Safety Engineering
基金
煤矿安全高效开采省部共建教育部重点实验室开放基金项目(JYBSYS2015101)
河北省高等学校科学技术研究项目(QN2016230)
国家自然科学基金项目(51174070
51174015)
河北省自然科学基金项目(E2015402038)
关键词
深部矿井
软岩巷道
底鼓
底板锚索束
深浅注浆
eepmine
softrock
floor heave
cablebeam
shaUow and deep part grouting
