东篱科研大数据发现系统（DRDS）

位置：成果数据库 > 期刊 > 期刊详情页

构造复杂区域膨胀软岩巷道底鼓控制研究

期刊名称：采矿与安全工程学报
时间：0
页码：16-21+27
语言：中文
分类：TD327.3[矿业工程—矿井建设]
作者机构：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,力学与建筑工程学院,江苏徐州221008
相关基金：国家自然科学基金项目（50804046, 50774082, 50490273）; 国家重点基础研究发展计划（973）项目（2007CB209400）
相关项目：岩石断裂及其强度的结构效应研究

关键词：膨胀软岩, 底鼓, 锚注, 砌碹, swelling soft rock, floor heave, bolting-grouting, arch walling

中文摘要：

某矿-400 m水平水仓位于复杂地质构造区域内且底板极具亲水膨胀性,在高构造应力、高膨胀应力作用下,原有普通锚网索喷支护方案无法维持水仓底板的基本稳定;根据现场地质条件,针对原支护方案的不足,分析了水仓底鼓变形的主要影响因素,并对底鼓变形全过程进行了数值模拟.提出采用＂先刚后让再抗＂的底鼓控制技术途径,对水仓围岩采取锚注＋全断面钢筋混凝土砌碹支护总体方案,并辅助聚乙烯泡沫缓冲层卸压措施.通过模型试验验证了这种＂刚让抗＂多级支护结构解决高应力状态下大变形问题的有效性.研究结果表明：巷道底鼓变形从巷道整体压缩变形开始,底板在严重水平挤压变形后发生破坏而隆起;对松动围岩注浆加固后,可有效提高围岩的自身承载能力和支护结构的整体性;采用＂刚让抗＂多级支护结构,可有效控制巷道的严重底鼓变形.

英文摘要：

The sump of a certain coal mine at-400 m level is located in an area where the geological structure is complicated and its floor strata have a swelling characteristic when water is meet.Under a high tectonic stress and high expansion stress,previous common anchoring-netting-bolting and pre-stressed cabling support can not at all keep its indispensable stability of surrounding rock in the sump.Based on the survey of in-situ geological conditions and the shortcoming analysis of previous support design,we analyzed the main important influential factors of floor heave.The whole floor heave process is also numerically simulated.An approach of ＂rigidity-unloading-resistance＂ to control floor heave is adopted and a support design of bolting-grouting and full-face reinforced concrete arch walling with unloading measures of polyethylene foam buffer layer is used in the sump.The ＂rigidity-unloading-resistance＂ multilevel support structure to solve large deformation problems under high stress is validated by similar material experiments.The research results show that floor heave initiates from the whole compaction of roadways and forms at the failure of floor strata after heavy horizontal extrusion.Grouting in broken surrounding rock can effectively improve itself loading-capability and the integrity of support structure.The ＂rigidity-unloading-resistance＂ multilevel loading structure can control heavy floor heave of roadways effectively.

同期刊论文项目