摘要
为了探讨松软破碎围岩巷道合理的控制方法,以山西鑫鼎泰煤矿2#松软破碎煤层轨道大巷为研究对象,采用现场调查、数值模拟和理论分析相结合方法,探讨了破碎软岩条件下巷道破坏的原因、过程及耦合支护参数,通过数值模拟及工业性试验对该支护进行了评价。研究结果表明,巷道顶底板易成为破坏失稳的关键部位,使两帮承受更大载荷而发生片帮破坏,进一步削弱对顶板的支撑作用,形成破坏的恶性循环过程。基于支护体和围岩在强度和刚度不耦合使得支护异常困难,确定采用锚网索及U型钢棚的联合支护形式。研究结果在鑫鼎泰煤矿2#松软破碎煤层轨道大巷成功应用。
In order to investigate the reasonable control method to soft broken rock roadway, taking Shanxi Xindingtai Coal Mine 2# soft broken seam track roadway as the research object, using the combination methods of on - site investigation, numerical simulation and theoretical analysis, the article explored the roadway damage causes, processes and coupling support parameters under broken and soft rock conditions, and numerical simulation and industrial test of the snpport were evaluated. The results showed that roadway roof and floor easily become damaged key parts of instability, so that the two walls withstood greater loads and spalling damage occurred, and further weaken the supporting role of the roof, and formed a vicious cycle of destruction. Based on that support body and the rock strength and stiffness are not coupled, which is extremely difficult to determine the use of U - shaped steel anchor net shed and joint support form. Findings are successfully applied for 2# soft broken rock seam track roadway at Dintaixin Mine.
出处
《煤矿安全》
CAS
北大核心
2014年第6期144-147,共4页
Safety in Coal Mines
基金
"十二五"国家科技支撑计划资助项目(2012BAB13B04)
关键词
破碎软岩
耦合支护
数值模拟
支护评价
控制技术
broken soft rock
coupling support
numerical simulation
supporting evaluation
control technology
