浅埋煤层综采面护巷煤柱尺寸和布置方案优化

来源 :采矿与安全工程学报 | 被引量 : 0次 | 上传用户:thardway
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
根据浅埋薄基岩煤层顶板几乎沿采空区边缘垂直断裂,地表下沉速度快,采空区迅速压实等特点,运用理论分析、数值模拟和现场实测等研究方法,结合鄂尔多斯乌兰集团温家梁煤矿3-2煤层实际,得出了沿空掘巷合理护巷煤柱宽度为5m;滞后回采工作面50m左右,采空区基本处于稳定状态.在此基础上提出了在保证工作面顺序接替条件下的煤柱护巷与沿空掘巷相结合的回采巷道布置方案.现场应用表明:沿空掘进巷道和实体煤巷道在回采期间能保持较好的稳定性,使该矿工作面煤炭采出率提高了13%.
其他文献
Reliability of braking systems is a key requirement to ensure the safety of in using downward belt conveyor brakes.By analyzing and comparing three commonly use
金属的腐蚀是金属与周围介质作用而引起的破坏,金属的腐蚀行为不但与金属本身的因素有关,而且与腐蚀环境密切相关.口腔中连续不断的唾液分泌使其始终处于潮湿状态,而且唾液的
By analyzing the pollutant concentrations over the urban area and over the rural area of the city of Lanzhou,Gansu Province,China,the relationships between the
The title complex 1, {[CuEu(Hbidc)(HO)]·HO} (Hbidc = 1H-benzimidazole- 5,6-dicarboxylic acid), has been solvothermally synthesized and structurally characteriz
Heterogeneous oxidation of gas-phase Hg0 by nano-Fe2O3 was investigated on a fixed bed reactor, and the effects of oxygen concentration, bed temperature, water
In order to study dynamic laws of surface movements over coal mines due to mining activities,a dynamic prediction model of surface movements was established,bas
The collaboration of at least a threshold number of secret shareholders in a threshold secret sharing scheme is a strict requirement to ensure its intended func
An aqueous solution containing sodium polyacrylate(PAAS) was used in diffusive gradient in thin-films technique(DGT) to measure DGT-labile Ni2+ concentrations.T
针对杭州经济技术开发区内暂态电能质量导致用户生产损失的问题,建立了分布式电能质量在线监测网,对暂态电能质量进行监测,统计评估了监测结果,分析了电压暂降产生的原因,提
为了确定侧压系数对巷道变形与周边应力分布规律的影响,使用岩体力学、FLAC3D有限差分数值模拟软件对1