特厚煤层沿空掘巷矿压显现力学机制及控制技术研究  

Research on Mechanical Mechanism and Control Technology of Mine Pressure Appearance in Gob-side Entry Driving of Extra-thick Coal Seam

作　　者：朱乐章 宋浩然 陆银龙[2] ZHU Lezhang;SONG Haoran;LU Yinlong(Huaibei Mining Industry Co.,Ltd.,Huaibei 235000,China;China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]淮北矿业股份有限公司,安徽淮北235000 [2]中国矿业大学,江苏徐州221116

出　　处：《煤炭技术》2025年第4期87-93,共7页Coal Technology

基　　金：国家重点研发计划(2023YFC2907601)。

摘　　要：以淮北矿区袁店一井煤矿823工作面沿空掘巷为工程背景,研究了特厚煤层沿空掘巷力源结构特征与作用机理,分析了不同煤柱尺寸对沿空掘巷围岩变形与破坏的影响规律,揭示了沿空掘巷锚架联合支护作用机理,提出了823工作面风巷3种支护模式,并结合现场工业性试验与矿压监测优化了相关支护技术参数。研究结果表明:823工作面风巷围岩应力来源包括822工作面覆岩断裂拱内破断覆岩块体自重及其回转挤压作用、822工作面覆岩应力拱大结构外岩层载荷;823工作面风巷采用5 m小煤柱进行沿空掘巷较为合理;随着锚索滞后掘进工作面距离增大,巷道顶板下沉量逐渐增大,采用紧跟掘进工作面施工“锚架”支护新模式有利于实现巷道由被动支护向主动支护的转变;相比“6-5-6”和“6-6-6”支护模式,采用“9-7-9”支护模式巷道顶板下沉、底鼓、实体煤帮和小煤柱帮变形量分别降低了29.4%、57.9%、75.8%和56.9%,沿空巷道围岩变形得到有效控制,显著提升了支护效果。研究成果为解决特厚煤层小煤柱沿空巷道围岩治理难题提供了一定的理论与技术支持。Take the 823 working faces of the Yuandian Yijing coal mine in the Huaibei mining area as the engineering background,studies the structural characteristics and mechanism of force sources in gob-side entry driving of the extra-thick coal seam,analyses the influence of different coal pillar sizes on the deformation and destruction of surrounding rock in gob-side entry driving,reveals the mechanism of joint support of anchor frame along the open road,proposes three support modes for the windy lane of the 823 working faces and optimises the relevant support technical parameters by combining with the on-site industrial test and mine pressure monitoring.It has optimised the relevant support technical parameters.The results of the study show that the sources of stress on the surrounding rock in the wind tunnel of the 823 working face include the self-weight of the broken overburden blocks in the fracture arch of the overburden at the 822 working face and its rotational extrusion,and the loads on the rock layer outside the large structure of the stress arch of the overburden at the 822 working faces.It is more reasonable to use a 5 m small coal pillar to excavate along the air in the winding lane of 823 working face;as the distance of anchor cable lagging behind the digging face increases,the amount of roadway roof sinking gradually increases,and it is beneficial to use the new mode of"anchor frame"support to follow the construction of digging face to realise the change of the roadway from passive support to active support.Compared with the"6-5-6"and"6-6-6"support modes,the deformation of the roadway roof subsidence,bottom bulge,solid coal gang and small coal pillar gang in the"9-7-9"support mode has been reduced by 29.4%,57.9%,75.8%and 56.9%,respectively,and the deformation of peripheral rock along the open roadway was effectively controlled,which significantly improved the support effect.The research results provide theoretical and technical support for solving the problem of perimeter rock management of small coal pil

关 键 词：特厚煤层 沿空掘巷 力源结构 锚架联合支护 工业性试验 

分 类 号：TD322[矿业工程—矿井建设]