某矿2502采区冲击类型及其防治  

Type of Rock Bursting and its Precaution in 2502 Mining Field of A Colliery

作　　者：王玉刚[1] 乔中栋 窦林名[1] 于贵良 陈国祥[1] 巩思园[1] 

机构地区：[1]“煤炭资源与安全开采”国家重点实验室,中国矿业大学能源与安全工程学院,江苏徐州221008 [2]甘肃华亭煤电公司砚北煤矿,甘肃华亭744100

出　　处：《煤矿开采》2008年第1期66-70,共5页Coal Mining Technology

基　　金：国家自然科学基金项目(50474068);“十一五”国家科技支撑计划(2006BAK04B02,2006BAK03B06);国家重点基础研究发展规划(973)项目(2005CB221504)

摘　　要：2502采区250205上工作面回采5煤层,基本顶为坚硬稳定的粉砂岩,平均厚度12m左右;底板为胶结致密的中粗砂岩,平均厚度13m左右。其冲击特点是,工作面处于褶曲构造之中,回采初期处于向斜西翼,受到构造应力的强烈作用;中后期处于背斜轴部,构造应力影响明显减弱,顶板运动与冲击关系紧密。在冲击矿压发生后,巷道两帮没有鼓出,以底鼓为主,强烈冲击时伴有顶板下沉,但顶板没有断裂。冲击发生时震动剧烈,有震歪或压坏支柱和震断十字铰接顶梁现象。以此,可以确定该区域发生的冲击矿压为构造型(冲击型)冲击矿压为主的构造煤层型(冲击压力型)。对于此类冲击矿压,可采用煤体爆破卸压、煤岩体预注水和切顶爆破等3种措施解危。Basic roof of 250205 mining face was hard and stable sihstone with 12 m thickness and its floor was cemented and compact medium grit stone with 13 m thickness. The mining face was in buckle tectonic. At mining early stage, the face was west of syneline and endured large tectonic stress. At mining medium and late stage, the face was at axial of anticline and the influence of tectonic stress reduced; rock bursting was much related to roof movement. After rock bruiting, not side heave but floor heave of roadway occurred, roof subsidence would occurred when violent rock bruiting started but roof would net break. Shaking was so strong that props were damaged and articulated roof beams were broken during rock bursting. Therefore, the type of rock bursting in this area may be recognized as tectonic type. For this type rock bursting, coal blasting for loading relief, water injecting into coal and rock and blasting for breaking roof may be used to relieve bursting danger.

关 键 词：冲击矿压 褶曲构造 显现 冲击类型 解危 

分 类 号：TD32[矿业工程—矿井建设]