万利一矿采空区下工作面回撤通道布置位置研究  

Study on Layout Position of Working Face Withdrawal Channel under Goaf in Wanli No.1 Mine

作　　者：刘润 王朋飞 LIU Run;WANG Pengfei(Wanli No.1 Coal Mine,CHN Energy Baotou Energy Co.,Ltd.,Ordos 017000,China;College of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]国能包头能源有限责任公司万利一矿,内蒙古鄂尔多斯017000 [2]太原理工大学矿业工程学院,太原030024

出　　处：《煤炭技术》2024年第9期38-41,共4页Coal Technology

基　　金：国家能源集团科技项目(FW-2021.017)。

摘　　要：采空区下工作面末采阶段主、辅回撤通道及巷间煤柱在复杂应力环境影响下易发生大变形及破坏,影响工作面回撤。为此,以万利一矿42煤层工作面为工程背景,研究了下煤层工作面主、辅回撤通道布置于采空区下不同位置时回撤通道间护巷煤柱所受载荷的特点。结果表明:(1)当采厚比较小、煤厚较大、上下煤层间隔较小、上煤层直接顶较厚时,完全采空区下方回撤巷道间隔煤柱载荷更小;(2)当采厚比较大、煤厚较小、上下煤层间隔较大、上煤层直接顶较薄时,残留煤柱下方回撤巷道间隔煤柱载荷更小;(3)万利一矿42煤层将双回撤巷道布置于采空区下方时主、辅回撤通道及护巷煤柱受到的载荷更小,更利于回撤通道的稳定和维护。In the final mining stage of the working face under the goaf,the main and auxiliary withdrawal channels and the coal pillars between the roadways are prone to large deformation and damage under the influence of complex stress environment,which affects the withdrawal of the working face.Therefore,taking the 42 coal seam working face of Wanli No.1 coal mine as the engineering background,the characteristics of the load on the coal pillar between the main and auxiliary retracement channels of the lower coal seam working face are studied when the main and auxiliary retracement channels are arranged at different positions under the goaf.The results show that:(1)When the mining thickness ratio is small,the coal thickness is large,the interval between the upper and lower coal seams is small,and the direct roof of the upper coal seam is thick,the interval coal pillar load of the retracement roadway under the complete goaf is smaller;(2)When the mining thickness is large,the coal thickness is small,the interval between the upper and lower coal seams is large,and the direct roof of the upper coal seam is thin,the load of the interval coal pillar of the retracement roadway below the residual coal pillar is smaller;(3)When the double retracement roadway is arranged under the goaf in the 42 coal seam of Wanli No.1 coal mine,the load on the main and auxiliary retracement channels and the coal pillar of the roadway is smaller,which is more conducive to the stability and maintenance of the withdrawal channel.

关 键 词：采空区 回撤通道 巷间煤柱 支承压力 

分 类 号：TD822[矿业工程—煤矿开采]