摘要
以宁东煤田某煤矿为例,首先采用理论计算和数值模拟法对只有上部煤层开采时其底板破坏规律进行了分析,然后利用数值模拟法总结了在下部煤层开采后上部煤层开采时其底板破坏规律。单一煤层开采时底板破坏深度随着工作面回采呈现出"台阶状"增加,并且初始破坏深度较小;下部煤层开采后上部煤层开采时其底板破坏深度随着工作面回采变化不大,并且初始破坏深度较大。
Take a coal mine in Ningdong coal field as an example, theoretical calculation and numerical simulation were adopted to analyze floor failure rule of upper coal seam when it was mined.Then, the floor failure rule of upper coal seam after lower coal seam mined was studied based on numerical simulation. Single coal seam floor failure depth was increased as a ＂terrace＂ with working face mining and the initial failure depth was small. After lower coal seam mined, the change of upper coal seam floor failure depth was little with working face mining and the initial depth was large.
出处
《煤炭技术》
北大核心
2017年第7期79-81,共3页
Coal Technology
基金
国家重点研发计划课题(2016YFC0501104)
关键词
上行开采
底板破坏深度
矿井水害
ascending mining
coal seam floor failure depth
water disaster of coal mine
