软岩矿区近距离厚煤层群上行开采可行性研究  

Feasibility study on ascending mining of thick coal seam group at close distance in soft rock mining area

作　　者：李寿君 李哲 郝嘉伟 于斌 LI Shoujun;LI Zhe;HAO Jiawei;YU Bin(Zhalainuoer Coal Industry Co.,Ltd.,Manzhouli 021410,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]扎赉诺尔煤业有限责任公司,内蒙古满洲里021410 [2]山东科技大学能源与矿业工程学院,山东青岛266590

出　　处：《中国矿业》2021年第3期76-82,共7页China Mining Magazine

基　　金：华能集团总部科技项目“特厚煤层顶分层大采高综采高效铺网洁净开采技术与装备研发项目”资助。

摘　　要：以灵东煤矿Ⅱ2-1煤层、Ⅱ2-2煤层和Ⅱ3煤层为研究对象,采用FLAC 3D有限元软件进行模拟,研究在开采Ⅱ2-1煤层完毕,Ⅱ2-1煤层顶板全部破坏稳定后,Ⅱ3煤层开挖对Ⅱ2-2煤层底板的影响及Ⅱ2-1煤层受扰动后对Ⅱ2-2煤层顶板的二次影响。模拟结果表明:Ⅱ3煤层开采对Ⅱ2-2煤层无直接破坏影响,但Ⅱ2-1煤层与Ⅱ3煤层工作面两侧,煤柱产生的应力集中区对Ⅱ2-2煤层的安全生产有一定程度的影响。最后采用比值判别法和“三带”判别法对Ⅱ2-2煤层上行开采的可行性进行判定,结果显示:Ⅱ3煤层开采后,Ⅱ3煤层与Ⅱ2-2煤层的层间距能满足Ⅱ2-2煤层上行开采的要求,其对保障Ⅱ2-2煤层工作面安全高效开采具有重要意义,同时对该矿今后采面的上行开采工作具有有效的指导意义。Taking theⅡ2-1,Ⅱ2-2 andⅡ3 coal seams of Lingdong coal mine as the research object,using FLAC 3D finite element software to simulate,the study is conducted after mining theⅡ2-1 coal seam and the roof of theⅡ2-1 coal seam is completely destabilized,the excavation of theⅡ3 coal seam The influence of theⅡ2-2 coal seam floor and the secondary influence of theⅡ2-1 coal seam on the roof of theⅡ2-2 coal seam after being disturbed.The simulation results show that the mining of theⅡ3 coal seam has no direct damage to theⅡ2-2 coal seam,but the stress concentration areas generated by the coal pillars on both sides of theⅡ2-1 coal seam and theⅡ3 coal seam have a certain degree of influence on the safety production of theⅡ2-2 coal seam.Finally,the ratio discriminant method and the three-zone discriminant method are used to judge the feasibility of ascending mining of theⅡ2-2 coal seam.The results show that:after theⅡ3 coal seam is mined,the interval between theⅡ3 coal seam and theⅡ2-2 coal seam can meet the requirements of theⅡ2-2 coal seam ascending mining requirement,it is of great significance to ensure the safe and efficient mining of coal seamⅡ2-2,and at the same time,it has effective guiding significance for the upward mining of the mining face in the future.

关 键 词：上行开采 厚煤层群 比值判别法 “三带”判别法 软岩矿区 

分 类 号：TD325[矿业工程—矿井建设]