窄煤柱工作面沿空留巷围岩大变形控制技术及应用  

Large deformation control technology and its application of surrounding rock along gob-side entry in narrow coal pillar face

作　　者：佐江宏[1] 陈晓祥[2,3] ZUO Jianghong;CHEN Xiaoxiang(Wuyang Coal Mine,Lu’an Environment & Energy Stock Corporation,Changzhi 046103,Shanxi,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;The Collaborative Innovation Center of Coal Safety Production of Henan Province,Jiaozuo 454000,Henan,China)

机构地区：[1]山西潞安环保能源开发股份有限公司五阳煤矿,山西长治046103 [2]河南理工大学能源科学与工程学院,河南焦作454000 [3]煤炭安全生产河南省协同创新中心,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2019年第2期27-33,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(U1504515;51304068);中国煤炭工业协会指导性研究计划项目(MTKJ2015-251);2017年度河南省高等学校青年骨干教师培养计划项目(2017GGS055)

摘　　要：针对窄煤柱工作面沿空留巷巷旁支护体参数不合理和围岩严重变形等问题,研究了不同巷旁支护体宽度、强度和充填率对窄煤柱工作面沿空留巷围岩变形破坏的影响。研究结果表明:充填体宽度、强度和充填率不同,对窄煤柱工作面沿空留巷围岩应力分布及变形有很大影响;充填体宽度、强度和充填率过低时充填体承载能力较小,沿空留巷围岩变形量较大;过高时顶板下沉量减小不明显,使成本增加;充填体宽度2 m,强度为30 MPa,充填率95%以上,可保证沿空留巷围岩稳定;提出的"巷内锚网索+巷旁充填柔模混凝土墙+单体柱+基本底注浆"联合支护技术,控制了沿空留巷围岩的大变形。工业性试验结果表明:沿空留巷顶底板移近量最大值600 mm,两帮移近量最大值为435 mm,分别是原方案变形量的55. 5%和51. 6%,沿空留巷围岩变形得到有效控制,能满足通风和安全生产的要求。Because of the unreasonable support parameters and surrounding rock large deformation of gob-side entry retaining in narrow coal pillar face,the influences of different width,strength and filling ratio of entry-side support on deformation and failure of surrounding rock of gob-side retaining in narrow coal pillar face were studied.The results showed that the different width,strength and filling rate of entry-side support had different influence on the stress distribution and deformation of surrounding rock;when the width,strength and filling rate of entry-side support were too low,the roof subsidence couldnot be prevented;while they are too high,the subsidence of the roof was not obvious,and the cost was increased;the width of entry-side support was 2 m,the strength was 30 MPa,and the filling rate was above 95%.It could keep the stability of surrounding rock of entry-side support;the combined support technology of“anchor cable in roadway+flexible formwork concrete of entry-side support+single hydraulic prop+grouting in basic bottom”were put forward and successfully applied in engineering.The application results showed that the maximum displacement of roof-to-floor convergence was 600 mm,and the maximum value of two-party approach was 435 mm,which was 55.5% and 51.6% of the original deformation.The surrounding rock deformation along the gob-side entry retaining was effectively controlled and met the requirements of ventilation and safe production.

关 键 词：窄煤柱工作面 沿空留巷 巷旁支护 充填 围岩控制 

分 类 号：TD350.1[矿业工程—矿井建设]