解盘石;段建杰;皇甫靖宇;田双奇;

• 1:西安科技大学西部矿井开采及灾害防治教育部重点实验室
• 2:西安科技大学能源学院

摘要(Abstract)：

为了研究大倾角煤层多区段开采围岩运移规律,采用物理相似模拟实验方法,分析了大倾角煤层多区段采场顶板和煤柱变形破坏规律、底板应力分布及演化规律、垮落矸石充填特征等。结果表明:大倾角煤层多区段开采围岩运移规律不同于单区段开采,下区段采动导致上区段采场倾向中、上部垮落顶板出现二次下沉和滑移,顶板运移曲线呈现沿倾斜方向"上大下小"的双峰特点,垮落顶板非均匀充填导致采空区底板应力沿倾向呈现出中部>下部>上部,下区段采动导致上区段采空区中部底板应力显著增加。下区段开采致使区段煤柱上、下两侧非对称受载并发生破坏,引发了煤柱-上区段采场煤岩体的连锁运动;区段煤柱支承压力从上区段开采时的"W"型分布变为下区段开采时的"V"型分布,增载系数达到4.9.研究可为大倾角煤层多区段围岩控制提供了理论指导。

关键词(KeyWords)： 大倾角煤层;多区段开采;顶板运移;二次扰动;非均匀充填

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51774230,51634007);; 陕西省创新能力支撑计划(科技创新团队)(2018TD-038);; 西安科技大学学科高峰计划项目(2018GG-2-07)

作者(Author): 解盘石;段建杰;皇甫靖宇;田双奇;

Email:

DOI: 10.13800/j.cnki.xakjdxxb.2020.0204

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