王洼矿巷道围岩特征的实验研究  

Experimental study on rock-mass characteristic at roadways in Wangwa coal mine

作　　者：张杰[1,2] 程学智 樊贵强 刘斌科 赵毕 付贵 张芳宁 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]教育部西部矿井开采及灾害防治重点实验室,陕西西安710054 [3]宁夏王洼煤业有限公司,宁夏固原756504

出　　处：《辽宁工程技术大学学报（自然科学版）》2011年第6期818-821,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(51174157);陕西省教育厅专项科研计划资助项目(09JK599)

摘　　要：为了研究王洼煤矿围岩变形原因,调研分析了该矿煤层开采深度,围岩变形情况。进行了围岩特征的力学实验,煤层顶底板均为泥岩,岩体强度低、有明显的节理和裂隙,煤层内生裂隙和构造裂隙都发育,一般锚固长度支护的有效性差。研究表明,巷道围岩结构属破碎软岩,围岩成分属于较膨胀软岩至膨胀软岩,底板属于极软弱底板,现有锚网支护条件下围岩不能保持平衡,难进入稳定状态,满足不了该条件下的围岩变形。研究结论对该矿巷道支护设计和参数选择具有一定的指导作用。In order to study the underlying mechanism of rock-mass deformation at Wangwa coal mine,this study investigates the mining depth of coal seams and the deformation of surrounding rock mass.Also the mechanical tests are conducted to test the characteristics of surrounding rock.The roof and floor are mudstones with a low strength and various joints and fractures.The endogenous fractures and construction fractures are well developed in coal seams.Therefore,a regular anchor with normal length is not sufficient for the anchoring support required.The experimental study indicates that the structure of rock-mass is a cracked soft rock structure,its composition of rock-mass is lower expansible soft rock and expansible soft rock,and its floor is extremely soft floor.The present anchor system cannot maintain the balance between rock-mass and its supports,and also cannot satisfy the rock-mass deformation.The study provides a useful guidance for designing roadway support and selecting support parameters.

关 键 词：王洼矿 巷道 围岩特征 变形 破坏 实验研究 支护 对策 

分 类 号：TD353[矿业工程—矿井建设]