基于岩体阻水能力测试的煤层底板突水评价方法  

Evaluation methods of water inrush in floor on the basis of rock water-resisting ability

作　　者：王希良[1] 张书国[2] 李水祥[2] 

机构地区：[1]石家庄铁道学院土木工程分院,河北石家庄050043 [2]冀中能源股份有限公司邢台矿,河北邢台054021

出　　处：《煤田地质与勘探》2012年第1期38-42,共5页Coal Geology & Exploration

基　　金：河北省自然科学基金项目(E2009000918)

摘　　要：以金牛能源股份有限公司邢台矿9号煤开采为例,对底板岩体质量及阻水性能进行了评价。首先分析了开采煤层的底板岩体地质结构,获取了岩石力学参数;进行了地应力测试,掌握了该区域地应力性质;进行了矿山压力显现规律研究,获取了工作面的初次垮落步距、周期来压步距和来压强度;在综放和综采工作面进行了底板破坏深度测试,得到了不同开采条件下煤层底板破坏深度;采用三维非线性固—液耦合岩石水力学计算方法,以非线性数值模拟软件ANSYS为手段,建立了三维数值仿真模型,根据矿井水文地质、工程地质特征和开采技术条件,分4种工况,对不同开采阶段、不同深度煤层底板应力分布、破坏状态的影响进行了分析研究。数值模拟结果表明,从突水的必要条件(底板破裂带贯通)和充分条件(水平应力小于承压水压力)来考察,在本次计算采用的工作面开采条件和正常的地质条件下,突水的可能性由大到小依此为:工况Ⅳ>工况Ⅲ>工况Ⅱ>工况Ⅰ,由此为该矿首个9号煤工作面开采选择提供了依据。The rock mass quality and the water blocking performance in the floor was evaluated,with extraction of seam No.9 in Xingtai coal mine as an example.First of all,analysis of geological structures of coal seam floor was conducted,and the rock mechanics parameters were obtained;the ground stress was tested,the nature of ground stress was grasped in this region;The rock pressure behavior was studied,the step of the initial collapse and step of the pressure cycle of working face were obtained.The depth of floor damage in fully mechanized and coal top-coal mining face was tested.On the basis of the above-mentioned study,by using three-dimensional non-linear solid-liquid coupling calculation of rock hydraulics,and by means of non-linear numerical simulation software ANSYS,three-dimensional numerical simulation model was established.The stress distribution of coal seam floor of different stages of mining was studied according to the mine hydrogeological,engineering geological character-istics and conditions of mining technology.Numerical simulation results show that the possibility of inrush water was as condition Ⅳ condition Ⅲ condition Ⅱ conditionⅠ,the basis for selecting the first coal mining of 9th coal seam was provided

关 键 词：底板岩体 阻水能力 试验测试 ANSYS 突水评价 

分 类 号：TD741[矿业工程—矿井通风与安全]