基于覆岩运动规律的煤矿开采工程关键层断裂机理研究  

Fracture Mechanism of Key Layers in Coal Mining Engineering Based on Overlying Rock Movement Law

作　　者：王英杰 WANG Yingjie(Shanxi Xinzhou Shenda Energy Group Co.,Ltd.,Xinzhou 034000,Shanxi,China)

机构地区：[1]山西忻州神达能源集团有限公司,山西忻州034000

出　　处：《能源与节能》2024年第5期47-49,共3页Energy and Energy Conservation

摘　　要：随着煤矿开采工程的推进,煤矿区域矿震严重威胁着工人的安全。为了监测煤矿开采工程的安全性,对古城煤矿矿井顶板覆岩层的移动规律进行了分析,在此基础上,通过深入研究古城煤矿煤层顶板上覆岩层的移动对煤层关键层位的影响,从而挖掘出煤层顶板裂隙与采掘工程的关系。数值模拟分析结果表明,从整体上看,沉降速率曲线先增后减。在早期的监测时段内,沉降速率较大,2月为6.28 mm/d。后期沉降速率约为5.37 mm/d,沉降速率仍较高,沉降率呈下降趋势。沉降速率曲线初期比较陡,后期渐趋平缓,这表明地面沉降量随时间增加而降低,最终进入缓沉期。深部煤层顶板常形成多个关键层位,煤层开采容易引起多个关键层位的协同活动。采动区域上覆百米以内无巨厚岩层,采区采动后,覆岩破断、下沉、移动充分,与正常地层移动规律相吻合,总体上无大面积悬顶发生的可能。研究对煤矿开采工程中安全问题的解决有一定的借鉴价值。With the advancement of coal mining engineering,mine earthquake in coal mine area seriously threatens the safety of workers.In order to monitor the safety of coal mining engineering,the movement law of the overlying strata in Gucheng Coal Mine was analyzed.On this basis,the relationship between the seam roof crack and mining engineering was dug out by deeply studying the influence of the overlying strata movement on the key strata of the coal seam in Gucheng Coal Mine.The numerical simulation results showed that the sedimentation rate curve increased first and then decreased overall.In the early monitoring period,the sedimentation rate was larger,which was 6.28 mm/d in February.The later settlement rate was about 5.37 mm/d,which was still relatively high,and the settlement rate showed a downward trend,which was steep in the early stage and gradually gentle in the later stage,indicating that the surface settlement gradually decreased with the passage of time and finally entered the slow settlement period.The roof of deep coal seam often forms several key levels,and coal seam mining is easy to cause the cooperative activities of several key levels.There is no thick rock layer within a hundred meters above the mining area.After mining,the overlying rock breaks,sinks,and moves sufficiently,which is consistent with the normal movement pattern of the strata.Overall,there is no possibility of large-scale suspended roof occurrence.The research has certain reference value for solving safety issues in coal mining engineering.

关 键 词：覆岩运动规律 煤矿开采工程 关键层 断裂机理 

分 类 号：TD31[矿业工程—矿井建设]