摘要
为了搞清"两硬"浅埋煤层开采覆岩活动规律,以大同煤业集团马脊梁煤矿为原型,在实验室进行了相似模拟实验,发现"两硬"浅埋煤层刀柱开采发生的大面积来压其实是多米诺效应引起的覆岩大面积切冒,垮落从直接顶开始,逐步扩展至松散层。地表下沉最大处出现在地表沉陷区的中部,上覆岩层的运移以垂直位移为主,呈倒梯形整体下沉。
In allusion to reveal movement law of overlying strata from mining shallow seam under＂two hard＂condition,took Majiliang Coal Mine as simuliton entity.The results show that ＂Domino＂ effect causes roof failure due to weighting over great extent in pillar mining shallow seam in mining face under＂two hard＂condition through the simulation experiment,that is to say,overlying strata caving in large area is from direct roof to loose layer.The maximum value of ground subsidence is in the middle of subsidence area,movement of overlying strata is mostly vertical displacement and integral sank inverted ladder.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第1期7-11,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(50704024)
山西省高等学校优秀青年学术带头人支持计划资助
关键词
马脊梁煤矿
浅埋煤层
覆岩活动规律
两硬
Majiliang Coal Mine
shallow seam
movement behavior of mined overlying strata
two hard
