软底石灰岩顶板沿空留巷综合支护技术  

Comprehensive Support Technology of Gob-side Entry Retaining in Soft Limestone Floor

作　　者：马庆 谭云亮[1,2] 赵增辉 李鑫[3] 李瑞 

机构地区：[1]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590 [2]山东科技大学矿业与安全工程学院,山东青岛266590 [3]鲁中矿业集团莱新铁矿有限责任公司,山东莱芜271113 [4]山东能源新矿集团新巨龙公司,山东菏泽274918

出　　处：《煤矿安全》2017年第11期155-158,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51474137);山东省科技发展计划资助项目(2014GSF120002);中国博士后科学基金资助项目(2016M592221)

摘　　要：针对软底坚硬顶板沿空留巷悬顶时间长,悬顶距大,底板松软,易造成巷道端头部位支护强度不足及顶板来压时沿下帮煤壁折断问题,提出"提高支护强度,强力实现沿空切顶"的支护理念;设计了单体液压支柱切顶与锚网护顶、混凝土垛切顶与锚网护顶、密集单体液压支柱切顶与锚网护顶3种巷旁支护方案;以滨湖煤矿泥岩底板石灰岩顶板沿空留巷为例,通过数值模拟和现场监测表明锚网+单体液压支柱切顶与锚网护顶为最优支护方案,可有效控制巷道顶板下沉并实现切顶。For the problems that long hanging time and big hanging distance of gob-side entry retaining with hard roof and soft bottom easily cause the insufficient support strength of roadway ends and coal wall broken when the roof is weighted, the concept＂to improve the support strength, to strongly achieve roof cutting along gob＂is proposed; three kinds of roof support schemes are designed, such as single hydraulic prop roof cutting and anchor net roof protecting, concrete roof cutting and anchor net roof protecting, dense single hydraulic prop roof cutting and anchor net roof protecting; taking the gob-side entry retaining of the limestone roof and mudstone floor in Binhu Coal Mine as an example, through numerical simulation and in-situ monitoring, it is shown that bolt-mesh ＋ single hydraulic pillar roof cutting and anchor net roof protecting is the optimal support scheme, which can effectively control the roof sinking and realize the roof cutting.

关 键 词：软底 坚硬顶板 沿空留巷 切顶 巷道支护 

分 类 号：TD353[矿业工程—矿井建设]