煤层顶板次生离层水害成因的模拟研究  

Simulation of water hazards caused by burst of water cells formed by overburden stratum separation

作　　者：王经明[1] 喻道慧[2] 

机构地区：[1]华北科技学院,北京065201 [2]淮北矿业集团公司,安徽淮北235001

出　　处：《岩土工程学报》2010年第2期231-236,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(40772152)

摘　　要：次生离层水害是在没有水源的情况下发生的煤层顶板溃水灾害,灾害的成因一直没有很好的认识和解释,给矿山水害防治带来了很大的困难。以海孜煤矿为例,对此类水害问题进行了水文地质、工程地质条件和开采条件分析,顶板运动的相似材料模拟和数值模拟,最终发现了一种新的水害类型,提出了一种新的水害成因观点,即次生离层水包破裂致灾观点。钻探和钻孔成像证实了理论分析和实验结果。针对灾害成因,采取了采动疏干的防治水方法,取得了满意的效果,确保了类似条件工作面开采的安全。对灾害成因的模拟不但在理论上填补了水害类型的空白,且给此类型水害的防治探索了一条途径。Hazards due to stratum separation are a type of roof water hazards that unexpectedly happen under the conditions without any water reservoir.However,the hazard origins have not been understood or explained,resulting in great difficulties in control of water hazards in coal mines.To solve the problem,Haizi Coal Mine is taken as a case study.The hydrogeological,geotechnical and mining conditions are analyzed.The roof stratum failure and displacement are analogized physically and simulated numerically.A new type of water hazards is found finally,and a new theory for the mine hazards,i.e.water hazards caused by burst of water cells formed by overburden stratum separation,is put forward.The drilling and borehole camera scanning have verified the above theory.According to the theory,the dynamic draining measures are proposed and used successfully in the control of water hazards.The research achievements are applied to other working faces with the similar hydrogeological conditions for coal mining safety.The investigation on the hazards by simulations not only theoretically fills the gap of water hazard classification for coal mines,but also finds a way for the control of water hazards in coal mines.

关 键 词：次生离层水 顶板 数值模拟 相似材料模拟 疏干 

分 类 号：TD745[矿业工程—矿井通风与安全]