| 煤层构造岩顶板稳定性初探 |
| |
| 引用本文： | 王志荣.煤层构造岩顶板稳定性初探[J].煤田地质与勘探,1992,20(2):44-46. |
| |
| 作者姓名： | 王志荣 |
| |
| 作者单位： | 河南省煤炭科学研究所 郑州 450002 |
| |
| 摘 要： | 河南登封煤田郜城井田二1煤层顶板为滑动构造形成的构造岩,岩石破碎,结构松散,极难管理。为寻求合理有效的管理方法,通过宏观观察、镜下鉴定和岩石组构分析等研究,该顶板自下而上可分为断层泥、断层角砾岩、构造破碎带和裂隙带;断层角砾岩分为张性角砾岩和剪性角砾岩,它们是在深层塑性形变的基础上迭加了后期浅层脆性形变的产物。通过工程地质特性试验,其泥化现象明显。针对断层泥软化、膨胀、崩解和泥化现象,应用短段、快速掘砌法施工,严格排水措施,减少岩帮暴露时间,岩帮开挖压力释放槽等方法减缓膨胀;对张性角砾岩围岩,采用工作面预注浆加固,先锚喷后作永久支护办法减少围岩松动;顶板采用密集木支柱支护或迫使冒落法管理。
|
| 关 键 词： | 登封煤田 推覆构造 构造岩 稳定性 顶板管理 |
| 收稿时间： | 1991-08-07 |
INVESTIGATION TO THE TECTONITE ROOF OF THE COAL SEAM FOR THE STABILITY |
| |
| Wang Zhirong.INVESTIGATION TO THE TECTONITE ROOF OF THE COAL SEAM FOR THE STABILITY[J].Coal Geology & Exploration,1992,20(2):44-46. |
| |
| Authors: | Wang Zhirong |
| |
| Institution: | Institute of Coal Sciences, Henan Province |
| |
| Abstract: | The roof of the 2_1 coal seam in Gaocheng area of Dengfeng Coal Field is a tectonite formed by gliding. It is broken,incompact in texture and difficult to control. According to the results of the field work, the microscopic examination and the fabric analysis, this tectOnote roof can be divided from the lower to the upper into four zones,they are the gouge, the fault breccia,the tectonoclastic and the crack zones. The fault breccia includes two kinds of tension and shear, they are formed under the deepseated plastic deformation, with addition of the late shallowseated brittle deformation. After the engineering properties tests, it is found that the clay grouting of the tectonite is obvious. In order to control the roof of the 2_1 coal seam following measures are taken. First the underground lanes are dug and built rapidly and short range by short range so as to shorten the time for the lane walls to open. Then the pressure relieve troughs are dug in the side walls of the lanes to save the swell of the wall rocks. The slurry is preinjected into the working faces to make them firm and to keep the wall rocks from collapsing. Last the roof is supported with dense woody props or made collapsed forcibly. |
| |
| Keywords: | Dengfeng Coal Field nappe structure tectonote stability roof control |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《煤田地质与勘探》浏览原始摘要信息 |
| 点击此处可从《煤田地质与勘探》下载免费的PDF全文 |
|
