采场覆岩裂隙演化分区与渗透性研究  

Division of mining-induced fracture and permeability of overlying strata

作　　者：许兴亮[1] 张农[1] 田素川[1] 

机构地区：[1]中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2014年第4期564-568,共5页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2011CB201200);中央高校基本科研业务费专项资金项目(2011QNA11)

摘　　要：通过分析开采条件下工作面前方支承压力分布规律和煤体卸压破坏全过程的采动力学行为,采用实验室实验研究了工作面前方承载应力环境下岩体渗透性的变化;揭示了采动影响下采场空间裂隙发育与演化规律,提出工作面前方裂隙发育区形成的主要原因是强度破坏,并分为原岩裂隙区、应力集中裂隙孕育区、卸压剪切裂隙发育区,渗透性较强的区域为卸压剪切裂隙发育区,与塑性区近似重合。With the analysis of front abutment pressure distribution and mining-induced mechanical behavior of surrounding rock under the condition of relief failure, rock permeability changes in the front bearing stress environment are studied in the method of laboratory testing. Fracture development and evolution law of overlying strata under mining condition is revealed. The paper points out that the main cause of fracture development in front of the work face is strength failure, and the zone is divided into three parts： the original rock fissure zone, the stress concentration and fracture inoculation zone, the pressure relief and shear fracture development zone. The zone which has a better permeability accords with the plastic zone.

关 键 词：采动岩体 裂隙演化 渗透性 

分 类 号：TD353[矿业工程—矿井建设]