葫芦素井田深部巷道原位地质力学测试  

In situ geomechanical test of deep roadway in Hulusu mine field

作　　者：李永元 邓文彬[1] LI Yongyuan;DENG Wenbin(School of Architecture and Engineering,Xinjiang University,Urumqi 830000,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830000

出　　处：《陕西煤炭》2022年第6期54-58,共5页Shaanxi Coal

摘　　要：葫芦素井田内开采的侏罗纪2^(-1)和2^(-2)煤层深度已达到630~660m。在高应力作用下,巷道压力明显增大,围岩变形明显。为解决这一突出问题,通过采用水压致裂法和钻孔触探法对井下4个测点进行了地应力和巷道围岩强度原位测试,分析了2^(-1)和2^(-2)煤层的围岩力学参数。研究表明:葫芦素煤矿所测区域应力场在量值上属于中等-高应力值区域,最大水平主应力为24.74MPa,垂直应力最大值为16.31MPa,最小水平主应力为13.36MPa。应力场类型全部为σ_(H)>σ_(v)>σ_(h)型应力场,区域构造应力占优势。建议在工作面回采期间,对顺槽巷道围岩结构进行观测,判断采动影响前后围岩结构的变化状况,为巷道掘进时合理选取支护参数提供依据。The depth of Jurassic 2^(-1) and 2^(-2) coal seams mined in the Hulusu mine field has reached 630~660m.Under the action of high stress,the roadway pressure increases significantly,and the surrounding rock deforms obviously.In order to solve this outstanding problem,by using hydraulic fracturing method and drilling hole contact detection method,the in-situ stress and roadway surrounding rock strength were tested at 4 underground measuring points,and the surrounding rock mechanics parameters of 2^(-1) and 2^(-2) coal seams were analyzed.The research shows that the stress field measured in Hulusu Coal Mine belongs to the medium-high stress value area,the maximum horizontal principal stress is 24.74 MPa,the maximum vertical stress is 16.31 MPa,and the minimum horizontal principal stress is 13.36 MPa.The stress field types are all σ_(H)>σ_(v)>σ_(h) stress fields,and the regional tectonic stress is dominant.It is suggested to observe the surrounding rock structure of the roadway along the trough during the mining period of the working face,and judge the change of the surrounding rock structure before and after the mining effect,so as to provide a basis for the reasonable selection of supporting parameters during the roadway tunneling.

关 键 词：深部开采 地质力学 水平主应力 合理支护 

分 类 号：TD163[矿业工程—矿山地质测量]