综放工作面软底沿空留巷围岩控制技术研究  

Surrounding rock control technology of soft-floor gob-side entry retaining in fully mechanized caving face

作　　者：宋旭斌 SONG Xubin(Gucheng Coal Mine,Shanxi Lu'an Mining(Group)Co.,Ltd.,Changzhi 046108,China)

机构地区：[1]山西潞安矿业(集团)有限公司古城煤矿,山西长治046108

出　　处：《煤炭工程》2023年第2期38-44,共7页Coal Engineering

摘　　要：针对综放工作面软底沿空留巷变形严重的难题,以古城煤矿S1303辅助进风巷为研究对象,采用现场调研、数值模拟和现场试验等方法,分析了综放工作面软底沿空留巷变形异常特征,模拟研究长综放工作面软底沿空留巷应力变化规律。模拟结果发现:距实体煤约7.5m处存在应力峰值,以此确定分段扩孔技术有关参数;根据巷道围岩整体变形呈现明显非对称性特点,并提出“控顶-限帮-让底”为核心思路的围岩分区协同控制技术;通过工业性试验结果,认为该技术的支护效果较好,提高了沿空留巷的整体稳定性,可实现对软弱煤层底板的高效处理,对类似条件软底沿空留巷具有一定借鉴意义。Aiming at the serious deformation of soft floor gob-side entry retaining in the fully mechanized caving face, taking the S1303 auxiliary air intake way in Gucheng Coal Mine as the research object, on-site investigation, numerical simulation and field test were carried out to study the abnormal deformation characteristics and stress change law of soft-floor gob-side entry retaining in the long fully mechanized caving face. The simulation results showed that, there was a stress peak at about 7.5m away from the solid coal, based on which the relevant parameters of the segmented hole reaming technology are determined;according to the the coordinated control technology of surrounding rock zone was put forward with the core idea of “controlling the roof-limiting the side-walls-yielding the floor”;through the industrial test results, it is believed that this technology has a better supporting effect, improves the overall stability of the gob-side entry retaining, and can achieve efficient treatment of weak coal seam floors. Gob-side entry retaining with soft bottom under similar conditions has certain reference significance.

关 键 词：综放工作面 沿空留巷 围岩控制 软岩巷道 分段扩孔 柔模墙体 

分 类 号：TD322[矿业工程—矿井建设]