煤层底板承压含水层上安全开采技术研究  

Study on Technology of Safety Mining Above Pressurized Aquifer in Seam Floor

作　　者：张鹏[1] 孙亚军[1] 曹焕举[1,2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]义马煤业(集团)有限责任公司,河南义马472300

出　　处：《煤炭科学技术》2012年第9期104-107,共4页Coal Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2007CB209406)

摘　　要：基于我国华北煤电煤层底板太灰含水层富水性具有明显的差异性,在特定条件下可作为隔水层,为了准确确定底板隔水层厚度,预测底板突水危险性,结合新义煤矿首采区二1煤底板实际情况,运用物探、钻探等手段对其灰岩富水性进行探查分析。结果表明:该矿首采区底板灰岩可作为隔水层,从而将底板隔水层平均厚度增加至54 m左右,运用突水系数法评价得出首采区大部分区域的突水系数均小于正常块段临界突水系数0.1 MPa/m,在前期底板注浆加固基础上可以实现安全带压开采。Based on the obvious differences in the watery of Taiyuan limestone aquifer under the floor of North China Mining Area, under the certain conditions, the aquifer could be a water isolation layer. In order to accurately determine the thickness of the water isolation lay-er under the floor and to predict the water inrush dangers from the floor, in combination with the actual conditions of No. 21 seam floor in the first mining block of the Henan Xinyi Mine, the geophysical exploration, drilling exploration and other means were applied to the sur-vey and analysis on the watery of the limestone. The results showed that the floor limestone of the first mining block in the mine could be considered as a water isolation layer, thus the thickness of the floor water isolation layer could be increased to about 54 m in average. The water inrush coefficient method was applied to evaluate and obtain the water inrush coefficient value of the major area in the first mining block all below the critical water inrush coefficient of 0. 1 MPa/m in the normal section. Based on the previous floor grouting and rein-forcement, a safety mining above the pressurized water could be realized.

关 键 词：水文地质 底板突水 隔水层 承压含水层 突水系数 

分 类 号：P641.54[天文地球—地质矿产勘探]